Tektronixメーカー1780-Rの使用説明書/サービス説明書
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Operator ’ s Manual 1780R-Series V ideo Measur ement Set 070-6890-08 This document supports firmware version 1.10 to 1.16. Operator ’ s Manual 1780R-Series V ideo Measur ement Set 070-6890-08 This document supports firmware version 1.
Copyright © T ektronix, Inc. All rights reserved. T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.
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W ARRANTY T ektronix warrants that the products that it manufactures and sells will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment.
Contacting T ektronix Product Support For questions about using T ektronix measurement products, call toll free in North America: 1-800-TEK-WIDE (1-800-835-9433 ext.
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1780R-Series Operator ’ s Manual i T able of Contents General Safety Summary xi . . . . . . . . . . . . . . . . . . . . . . . . . . . . Getting Started Documentation Overview 1–1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator ’ s Manual 1–1 .
T able of Contents ii 1780R-Series Operator ’ s Manual Power 2–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CR T Controls 2–3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Precision Measurement (Large Knob) 2–5 .
T able of Contents 1780R-Series Operator ’ s Manual iii Parade Operation 3–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T wo Line or Field Parade 3–23 . . . . . . . . . . . . . . . . . . . . . . . . . . . Three Line Display 3–23 .
T able of Contents iv 1780R-Series Operator ’ s Manual Measure Menu 3–56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the Measure Menu 3–56 . . . . . . . . . . . . . . . . . . . . . . . . . . . Beep 3–57 . .
T able of Contents 1780R-Series Operator ’ s Manual v K Factor Measurement 4–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enter K Factor Mode 4–20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Making K Factor Measurements 4–20 .
T able of Contents vi 1780R-Series Operator ’ s Manual List of Figures Figure 1–1: Location of the four scr ews that secure the instrument to rack-mounting cabinet or portable case 1–5 . Figure 1–2: Dimensions used for rack-mounting the 1780R-Series V ideo Measur ement Set 1–6 .
T able of Contents 1780R-Series Operator ’ s Manual vii Figure 3–15: Left Side of Fr ont Panel, showing Menu Buttons and T ouch Screen 3–31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3–16: T ouch Screen 4 X 4 Matrix 3–33 .
T able of Contents viii 1780R-Series Operator ’ s Manual List of T ables T able 2–1: Possible Parade and Overlay Configurations 2–1 1 . . T able 2–2: W aveform Magnification 2–13 . . . . . . . . . . . . . . . . . . . T able 2–3: Multiple Filter Displays 2–14 .
T able of Contents 1780R-Series Operator ’ s Manual ix T able 5–2: W aveform Monitor V ertical System 5–2 . . . . . . . . . . T able 5–3: W aveform Monitor Probe Input 5–7 . . . . . . . . . . . . . T able 5–4: W aveform Monitor Horizontal Deflection System 5–7 .
T able of Contents x 1780R-Series Operator ’ s Manual T able of Contents x 1780R-Series Operator ’ s Manual.
1780R-Series Operator ’ s Manual xi General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. T o avoid potential hazards, use this product only as specified. Only qualified personnel should perform service pr ocedur es.
General Safety Summary xii 1780R-Series Operator ’ s Manual Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry . Provide Proper V entilation. Refer to the manual’ s installation instructions for details on installing the product so it has proper ventilation.
Getting Started Getting Started.
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1780R-Series Operator ’ s Manual 1–1 Getting Started Documentation Overview This operator ’ s manual is one of a set of two manuals that document the T ektronix 1780R-Series V ideo Measurement Set.
Getting Started 1–2 1780R-Series Operator ’ s Manual Documentation Conventions W ithin this manual, front-panel push-button names are shown all in capitals, such as the PRESET menu button. T ouch screen words are represented in brackets, such as <DEF AUL T>.
Getting Started 1780R-Series Operator ’ s Manual 1–3 A selection of internal and external graticules and electronic cursors permit measurements specific to many studio and transmission system applications. An external horizontal input facilitates ICPM measurements.
Getting Started 1–4 1780R-Series Operator ’ s Manual 1780R-Series Package The 1780R-Series is supplied as a single 5 1/4-inch high package, ready for rack-mounting. A portable cabinet is available, providing handle, feet, and front and rear covers.
Getting Started 1780R-Series Operator ’ s Manual 1–5 Figure 1–1: Location of the four screws that secure the instrument to rack-mounting cabinet or portable case W ARNING. Do not attempt to carry a cabinetized instrument without installing the r ear-panel mounting scr ews.
Getting Started 1–6 1780R-Series Operator ’ s Manual Figure 1–2: Dimensions used for rack-mounting the 1780R-Series Video Measurement Set Getting Started 1–6 1780R-Series Operator ’ s Manual.
Getting Started 1780R-Series Operator ’ s Manual 1–7 Figure 1–3: Dimensions of the adjustable rear rack-mounting bracket T o install the instrument in the rack: First remove the four securing screws and take the instrument out of the rack-mounting cabinet.
Getting Started 1–8 1780R-Series Operator ’ s Manual Figure 1–4: Installing rear rack-mounting brackets for rack applications of depths from 18 to 24 inches NOTE . For ease of installation, place the nut bars to the outside of the adjustable brackets and drive the scr ews from the center into the nut bars.
Getting Started 1780R-Series Operator ’ s Manual 1–9 Options The 1780R-Series is shipped with a standard U.S. plug, or can be ordered with one of the following options.
Getting Started 1–10 1780R-Series Operator ’ s Manual Optional Accessories The following is a list of the most common accessory items for the 1780R-Series.
Connectors, Controls, Indicators Connectors, Controls, Indicators.
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1780R-Series Operator ’ s Manual 2–1 Connectors, Controls, Indicators This section provides an overview of control and connector functions. T o locate more detailed information, please refer to the manual index or table of contents. Switches Push and release the front-panel switches to toggle between selections.
Connectors, Controls, Indicators 2–2 1780R-Series Operator ’ s Manual Audio Feedback (Beep) A Beep Sounds When: The limit of a front-panel control range has been reached. An attempt is made to change a locked setting. An attempt is made to access an invalid condition, such as a Parade display in 1-line mode.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–3 Front-Panel Controls NOTE . Locations for the following contr ols ar e shown in Figure 2–1. Power 1. POWER. The Power push-button switch turns the instrument on or to standby status, and displays a colored spot inside the switch when power is on.
Connectors, Controls, Indicators 2–4 1780R-Series Operator ’ s Manual Figure 2–1: Left side of front panel Connectors, Controls, Indicators 2–4 1780R-Series Operator ’ s Manual Figure 2–1:.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–5 7. VER T POS. Use the V ertical Position control to move the display up and down. A beep indicates the limits of the control range. (Positioning range is greater for waveform monitor than for vectorscope.
Connectors, Controls, Indicators 2–6 1780R-Series Operator ’ s Manual tion or variable sweep is selected, the cursor interval is magnified correspondingly . T o change the large knob assignment from one cursor to another , touch the quadrant labeled <CURSOR 1 / CURSOR 2>.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–7 Different lines can be displayed on the waveform and vector- scope CR T s, when that function is selected via the Line Select menu by touching <WFM = VECT> until <NO> is outlined.
Connectors, Controls, Indicators 2–8 1780R-Series Operator ’ s Manual Menu Access Switches NOTE . Detailed menu information is located in Section 3. 16. PRESET . This switch provides access to the Preset menu screen, which allows the user to store, recall, and name up to 12 complete instrument setups.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–9 Probe 20. BNC Connector . This is the input connector for a X1 or X10 probe. 21. CAL OUT . This pin jack outputs the calibration signal used to compensate the X10 probe. DC Restorer must be OFF (page 1 of the Configure menu) and EXT REF must be selected.
Connectors, Controls, Indicators 2–10 1780R-Series Operator ’ s Manual Figure 2–2: Right side of front panel Connectors, Controls, Indicators 2–10 1780R-Series Operator ’ s Manual Figure 2.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–1 1 NOTE . The following switch gr oups ar e companion switches: VECT / SCH & XY / PIX, P ARADE / OVERLA Y & W A VEFORM/ WFM + CAL. Refer to the preceding instructions entitled Companion Switch Example.
Connectors, Controls, Indicators 2–12 1780R-Series Operator ’ s Manual T able 2–1: Possible Parade and Overlay Configurations (Cont.) Display Automatic Selections Possible Inputs * Overlay C H B.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–13 and continuously increase the magnification factor . Magnifica- tion factors are shown in T able 2–2. T able 2–2: Waveform Magnification > tton Magni ication m sec/Div > Bu tton Setting Magni f ication Factor 1 Line 2 Line 3 Line Off X1 5.
Connectors, Controls, Indicators 2–14 1780R-Series Operator ’ s Manual 34. W A VEFORM (Control). Use this knob to control the amount of variable gain when V AR is selected. 35. VECTOR (Control). Use this knob to control the amount of variable gain when V AR is selected.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–15 NOTE . The thr ee INPUT switches ar e companion switches. Refer to the pr eceding Companion Switch Example. Input 39. A–B1 / B1–B2 / B1–B3. This switch selects from the following inputs for display: CH A minus CH B1, CH B1 minus CH B2, or CH B1 minus CH B3.
Connectors, Controls, Indicators 2–16 1780R-Series Operator ’ s Manual Rear Panel Connectors Connectors CH A, CH B1, CH B2, CH B3, EXT REF , and CW are high impedance bridging loop-through inputs.
Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–17 Figure 2–3: Rear-Panel Connectors Connectors, Controls, Indicators 1780R-Series Operator ’ s Manual 2–17 Figure 2–3: .
Connectors, Controls, Indicators 2–18 1780R-Series Operator ’ s Manual 12. EXT HORIZ. The EXT HORIZ input connector allows external control of waveform monitor sweeps. A positive-going signal deflects the sweep from left to right. A 0 V to +5 V signal is required for full scale deflection (ICPM).
Operating Instructions Operating Instructions.
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1780R-Series Operator ’ s Manual 3–1 Operating Instructions Large Knob And Associated Switches Timing Cursors Push the TIME switch to enable the timing cursors and obtain a menu on the vectorscope CR T . Use this menu to choose cursors that track together or are positioned separately , and to choose between locate and measure.
Operating Instructions 3–2 1780R-Series Operator ’ s Manual For softwar e versions 1.13 and up, installed in instruments SN B020100 and up: The Timing Cursor dots are positioned on the V oltage Cursors while in Line Select mode, for ease in viewing the T iming Cursors.
Operating Instructions 1780R-Series Operator ’ s Manual 3–3 For softwar e versions 1.13 and up, installed in instruments SN B020100 and up: V oltage cursors are automatically enabled when in Line Select with T iming Cursors. Line Select This switch enables the line select function, which is available for both waveform and vectorscope.
Operating Instructions 3–4 1780R-Series Operator ’ s Manual Figure 3–1: Line Select Menu Screen with <2 OF 4> Fields selected The waveform and vectorscope CR T s can be used to display the same selected line or different lines.
Operating Instructions 1780R-Series Operator ’ s Manual 3–5 Figure 3–2: Line Select Menu Screen with <1 OF 8> Fields selected For softwar e versions 1.13 and up: A dual Line Select mode is available for making ICPM measurements when in Line Select.
Operating Instructions 3–6 1780R-Series Operator ’ s Manual Knob The Precision Measurement control (large knob) provides analog precision adjustments associated with the REFERENCE SET , LINE SELECT , PHASE, TIMING CURSOR, and VOL T AGE CURSOR switches, or as assigned by menu selections.
Operating Instructions 1780R-Series Operator ’ s Manual 3–7 Figure 3–3: 1780R V ector Graticule The graticule includes four burst amplitude marks: 75% with setup, 75% with no setup, 100% with setup, and 100% with no setup.
Operating Instructions 3–8 1780R-Series Operator ’ s Manual amplitude centered around 100% standard amplitude. The dimen- sions of the smaller inner target represent ± 3 _ and ± 5% of chromi- nance amplitude. Note that the chrominance vectors associated with the –V burst are terminated in the smaller targets only .
Operating Instructions 1780R-Series Operator ’ s Manual 3–9 amplitude (3 dB), there are gaps in the horizontal and vertical axes. This calibration aid makes it possible to check the –3 dB points of the demodulator output amplifiers. Differential Gain and Phase Measurements.
Operating Instructions 3–10 1780R-Series Operator ’ s Manual XY INPUT Connector . The rear-panel XY INPUT connector is a 15-pin, sub-miniature, D-type connector that provides input to the Horizontal and V ertical (X and Y) Amplifiers.
Operating Instructions 1780R-Series Operator ’ s Manual 3–1 1 Pin Number Function 1 –X Input 2 No Connection 3 +X Input 4 No Connection 5 –Y Input 6 No Connection 7 +Y Input 8 No Connection 9 .
Operating Instructions 3–12 1780R-Series Operator ’ s Manual Using The W aveform Graticule Basic W aveform Graticule Markings. The two basic 1780R-Series internal waveform graticules are the NTSC and P AL graticules. The NTSC graticule is shown in Figure 3–6, and the P AL graticule is shown in Figure 3–7.
Operating Instructions 1780R-Series Operator ’ s Manual 3–13 Figure 3–7: 1781R W aveform Graticule Graticule horizontal scales are divided into 12.
Operating Instructions 3–14 1780R-Series Operator ’ s Manual of the bar . Use the ± 2% and ± 5% graticule marks to quantify the peak-to-peak deviation of the bar top (tilt or rounding) within the structure. The vertical gain can be increased to measure small errors.
Operating Instructions 1780R-Series Operator ’ s Manual 3–15 Remote Operation REMOTE Connector The rear-panel REMOTE connector is a subminiature 15-pin D-type receptacle with female contacts. All the active Remote control lines are enabled by remote ground closures or TTL levels (0 V to +0.
Operating Instructions 3–16 1780R-Series Operator ’ s Manual a. T o recall a preset, force the corresponding remote line low . b. T o store a front-panel configuration at a preset location, apply a low first to the Store line (pin 1 1) and then to the desired preset.
Operating Instructions 1780R-Series Operator ’ s Manual 3–17 T able 3–2: Remote Pin Functions (Cont.) Pin Function Name 9 Ground 10 Remote Sync Input 5 k W input impedance to ground. Polarity set by jumper A2J192. Factory set for positive polarity .
Operating Instructions 3–18 1780R-Series Operator ’ s Manual Serial Communications Interface Serial Interface Connector The rear-panel SERIAL interface connector is a 9-pin, sub-minia- ture, D-type connector . It is used as an RS422A or RS232D interface to the 1780R-Series microcontroller .
Operating Instructions 1780R-Series Operator ’ s Manual 3–19 9-Pin Male Connector Figure 3–10: Serial Interface Connector Wiring Converter Serial Remote Information 1780R-Series instrument configurations can be stored at (and retrieved from) a remote location.
Operating Instructions 3–20 1780R-Series Operator ’ s Manual T able 3–3: Serial Remote Commands to the 1780R-Series Command* Function Results #U or #u UPLOAD 1780R-Series sends a stream of data, representing the current instrument configuration, to the host computer .
Operating Instructions 1780R-Series Operator ’ s Manual 3–21 The data stream transmitted to and from the host (representing the current 1780R-Series settings) consists of 512 bytes, followed by a one-byte checksum. All data bytes are in the range of Hex 20 to Hex 7F , so that they are printable ASCII characters.
Operating Instructions 3–22 1780R-Series Operator ’ s Manual EXT REF setting: only one dot appears on the vectorscope compass rose. This relative mode allows the comparison of the color framing of two signals. The two signals are color framed when the sync dot is within 90 _ of the burst vector .
Operating Instructions 1780R-Series Operator ’ s Manual 3–23 Parade Operation NOTE . Switch function is further described in Section 2. Select the Parade mode of operation by pushing the P ARADE/ OVERLA Y button, shown in Figure 3–1 1, until the Parade LED lights.
Operating Instructions 3–24 1780R-Series Operator ’ s Manual Figure 3–12: Offsets Menu Screen T o obtain Offset menu, touch <OFFSET MENU> until <ON> is outlined. T ouch <OFFSET> until <V AR> is outlined, and touch CHB2 or CHB3 to assign large knob function to desired of fset.
Operating Instructions 1780R-Series Operator ’ s Manual 3–25 DC Level Measurement Procedure 1. Enter the Parade mode. Press the CONFIGURE button and then use the vectorscope touch screen to select <GND> under the <COUPLING> area. Press the CH B1 / CH B2 / CH B3 switch to go to Three Line.
Operating Instructions 3–26 1780R-Series Operator ’ s Manual Overlay Operation NOTE . Switch function is further described in Section 2. Select the Overlay mode of operation by pushing the P ARADE/ OVERLA Y button, shown in Figure 3–1 1, until the Overlay LED lights.
Operating Instructions 1780R-Series Operator ’ s Manual 3–27 WFM + CAL NOTE . Switch function is further described in Section 2. Enter WFM+CAL Mode Select the WFM+CAL mode of operation by pushing the WFM / WFM+CAL button, shown in Figure 3–1 1, until the WFM+CAL LED lights.
Operating Instructions 3–28 1780R-Series Operator ’ s Manual Figure 3–13: WFM + CAL Readout with ABS selected .
Operating Instructions 1780R-Series Operator ’ s Manual 3–29 When operating in the <V AR> mode, software versions 1.11 & Up provide a choice of absolute or relative readouts. When <ABS> is selected, the readout appears in IRE or mV .
Operating Instructions 3–30 1780R-Series Operator ’ s Manual 2. Use the large knob to align a horizontal reference point (usually the sync tip) of one display with the white bar of the second display . 3. Push the REF SET button and obtain a CAL readout of 0.
Operating Instructions 1780R-Series Operator ’ s Manual 3–31 equal that value when the back porch of one display is aligned with the white bar of the second display . c. The 700 mV (98.0 IRE) calibrator amplitude (NTSC and P AL) can be used to adjust component levels for component video.
Operating Instructions 3–32 1780R-Series Operator ’ s Manual Many selections are made by touching the desired word on the CR T screen, as shown in Figure 3–15. This is indicated by the use of the word ‘touch’ (as opposed to ‘push’ for front-panel switches).
Operating Instructions 1780R-Series Operator ’ s Manual 3–33 Figure 3–16: T ouch Screen 4 X 4 Matrix The touch screens are light sensitive, so it is not necessary to apply pressure. If it is necessary to adjust quadrant center points, refer to the 1780R-Series Service Manual .
Operating Instructions 3–34 1780R-Series Operator ’ s Manual Password Menu Figure 3–17: Password Menu Screen Enable / Disable the Password T o enable password operation, place button #2 of S385 (MPU board) in the closed position. T urn the instrument power to standby and back to on for the microprocessor to recognize the new switch setting.
Operating Instructions 1780R-Series Operator ’ s Manual 3–35 2, 3, and 4). That password is then stored, and remains in memory , even when the instrument power is turned to standby and back to on. Change the Password Move button #2 of S385 (MPU board) to the open position to disable password operation.
Operating Instructions 3–36 1780R-Series Operator ’ s Manual Preset Menu Figure 3–18: Preset Menu Screen Recall Recall Preset Settings. Push PRESET button to enter Preset menu, shown in Figure 3–18. Recall desired preset by touching the preset name.
Operating Instructions 1780R-Series Operator ’ s Manual 3–37 If a Measure menu selection (for example, user-modified R–Y SWEEP setup) has been stored at a Preset location, recalling it will cause the instrument to reenter the stored measurement mode (R–Y SWEEP in this example), turning on both Preset and Measure LEDs.
Operating Instructions 3–38 1780R-Series Operator ’ s Manual T able 3–5: Initial Settings (Cont.) Control Setting Control Setting COUPLING AC BEEP On FIELD TRIG F1 BAUD RA TE 9600 SLOW SWEEP TRI.
Operating Instructions 1780R-Series Operator ’ s Manual 3–39 As soon as any right-side front-panel control setting is changed, the instrument settings (as configured before that change) are saved, and the Preset menu is exited. T o recover saved configuration, push the PRESET button again, and then touch <RECOVER>.
Operating Instructions 3–40 1780R-Series Operator ’ s Manual Name Renaming a PRESET : H Push the PRESET button to enter Preset menu. H T ouch <Name>. If password is enabled, enter the password now . H <RENAME WHICH?> is added to the display .
Operating Instructions 1780R-Series Operator ’ s Manual 3–41 Figure 3–19: Name Menu Screen Operating Instructions 1780R-Series Operator ’ s Manual 3–41 Figure 3–19: Name Menu Screen.
Operating Instructions 3–42 1780R-Series Operator ’ s Manual Calibrate Menu General Calibration Menu Information The Calibrate menu is available for both vector and waveform, and uses both CR T s. Pushing the front-panel CALIBRA TE button provides access to the menu.
Operating Instructions 1780R-Series Operator ’ s Manual 3–43 W aveform Calibration Procedure 1. Apply a video signal to a 1780R-Series input channel and select that channel for display . 2. Push the front-panel CONFIGURE button and touch <FIXED CAL AMPL> until 1000 (1.
Operating Instructions 3–44 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–20: W aveform Calibration Menu Display Operating Instructions 3–44 1780R-Series Operato.
Operating Instructions 1780R-Series Operator ’ s Manual 3–45 7. T ouch <CAL AMPL ZERO SET> to obtain a menu on the waveform CR T for adjusting the calibrator zero level. Adjust the large knob to overlay the two calibrator waveforms. Press the front-panel REFERENCE SET button to record this zero setting.
Operating Instructions 3–46 1780R-Series Operator ’ s Manual i. T ouch <EXT HORIZ CAL>. The large knob will now adjust sweep length (time) with respect to the graticule. Do not change the MAG setting (automatically set to 100 mV/div). Adjust the large knob for a horizontal display of 10 divisions.
Operating Instructions 1780R-Series Operator ’ s Manual 3–47 Left CRT display Right CRT display Figure 3–21: V ectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.
Operating Instructions 3–48 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–22: V ectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.
Operating Instructions 1780R-Series Operator ’ s Manual 3–49 For 1781R (P AL), touch <GAIN CAL> and use the large knob to make the circle match the compass rose.
Operating Instructions 3–50 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 3–23: V ectorscope Calibration Menu Display for 1781R (P AL) all software versions, and for 1780R (NTSC) software versions 1.
Operating Instructions 1780R-Series Operator ’ s Manual 3–51 3. <READOUT INTENSITY> will be circled, and a test readout will be displayed. Use the large knob to adjust intensity . (The front-panel INTENSITY control adjusts signal intensity only .
Operating Instructions 3–52 1780R-Series Operator ’ s Manual Configure Menu Changing Configurations Push the CONFIGURE button to enter the Configure menu. All front-panel controls remain operational during Configure menu operation. The Configure menu is a three-page menu, shown in Figures 3–24, 3–25, and 3–26.
Operating Instructions 1780R-Series Operator ’ s Manual 3–53 Left CRT display Figure 3–24: Configure Menu Screen, page 1 T able 3–6: Configure Menu Selections, page 1 SYNC Direct or Auto Frequency Controlled wfm sync. COUPLING AC / DC coupling or ground reference, sets all four inputs.
Operating Instructions 3–54 1780R-Series Operator ’ s Manual Left CRT display Figure 3–25: Configure Menu Screen, page 2 T able 3–7: Configure Menu Selections, page 2 BARS V ectorscope can be calibrated to 75% or 100% color bars. PHASE DISPLA Y 360 = Phase reads from 0 _ to 360 _ .
Operating Instructions 1780R-Series Operator ’ s Manual 3–55 Left CRT display Figure 3–26: Configure Menu Screen, page 3 T able 3–8: Configure Menu Selections, page 3 CW SYNC When CW subcarrier is used for vectorscope reference, wfm sync source can be INT or EXT .
Operating Instructions 3–56 1780R-Series Operator ’ s Manual Measure Menu Left CRT display Figure 3–27: Measure Menu Screen Using the Measure Menu Push the front-panel MEASURE button to enter the Measurement menu, illustrated in Figure 3–27. T o select a measurement type, touch the desired measurement on the screen.
Operating Instructions 1780R-Series Operator ’ s Manual 3–57 Front-panel and menu settings are automatically adjusted to accommodate the selected measurement.
Operating Instructions 3–58 1780R-Series Operator ’ s Manual After both Preset and Measure menus have been exited, push the PRESET button and touch the appropriate preset. The stored measurement mode, including the user modifications, will be recalled.
Measurements Measurements.
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1780R-Series Operator ’ s Manual 4–1 Measurements Measurement Information Figure 4–1: Measure Menu Access NOTE . The measur ements described in this section ar e accessed thr ough the Measur ement menu, shown in Figur e 4–1. Push the front-panel MEASURE button to enable the Measurement menu.
Measurements 4–2 1780R-Series Operator ’ s Manual measurements, touch the <GO TO DIFF PHASE> and <GO T O DIFF GAIN> areas of the screen to alternate between those two measurement modes. T o perform additional measurements, push the MEASURE button and touch the next desired measurement.
Measurements 1780R-Series Operator ’ s Manual 4–3 Right CRT display Left CRT display Figure 4–2: Differential Phase Measurement Measurements 1780R-Series Operator ’ s Manual 4–3 Right CRT di.
Measurements 4–4 1780R-Series Operator ’ s Manual T able 4–1: DIFF PHASE Front-Panel Configuration VECTORSCOPE V ector display enabled, other choices locked out. W A VEFORM R–Y sweep displayed, all front-panel choices locked out. (There is no LED to indicate R–Y sweep.
Measurements 1780R-Series Operator ’ s Manual 4–5 NOTE . Fr eeze only available with Noise Reduction ON. Freeze. T o capture the display (right CR T only), touch <NOISE REDUCTION> so that <ON> is outlined, then touch <FREEZE>. <FREEZE> will be outlined.
Measurements 4–6 1780R-Series Operator ’ s Manual 3. Use the vectorscope variable gain control to set the amplitude of the chroma to be measured to the edge of the compass rose. 4. Use the large knob to set the phase of the chroma to be measured to the nine o’clock position.
Measurements 1780R-Series Operator ’ s Manual 4–7 2. Line Select readout is provided on the waveform CR T . Make sure the Line number is circled. If it is not, touch the screen in that area. 3. T ouch <MENU> to outline <ON> for Line Select menu display on the vectorscope CR T .
Measurements 4–8 1780R-Series Operator ’ s Manual Left CRT display Right CRT display Figure 4–3: Differential Gain Measurement Measurements 4–8 1780R-Series Operator ’ s Manual Left CRT disp.
Measurements 1780R-Series Operator ’ s Manual 4–9 T able 4–2: DIFF GAIN Front-Panel Configuration VECTORSCOPE V ector display enabled, other choices locked out. W A VEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.
Measurements 4–10 1780R-Series Operator ’ s Manual The captured display remains on the screen even if the input signal is removed. The display is lost when the DIFF GAIN menu is exited by any meth.
Measurements 1780R-Series Operator ’ s Manual 4–1 1 6. Differential gain is the amount of signal that is above or below the graticule reference mark. Read the amount directly off the graticule scale (waveform CR T); 1 major division = 1% (10 IRE NTSC or 100 mV P AL).
Measurements 4–12 1780R-Series Operator ’ s Manual Simultaneous Diff Phase & Diff Gain Measurements Enter DP & DG Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <DP & DG> on the screen to enable simultaneous differential phase and differential gain measurements.
Measurements 1780R-Series Operator ’ s Manual 4–13 Right CRT display Left CRT display Figure 4–4: DP & DG Measurement Measurements 1780R-Series Operator ’ s Manual 4–13 Right CRT display.
Measurements 4–14 1780R-Series Operator ’ s Manual T able 4–3: DP & DG Front-Panel Configuration VECTORSCOPE V ector display enabled, other choices locked out. W A VEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.
Measurements 1780R-Series Operator ’ s Manual 4–15 settings will be stored and recalled at next entry to DP & DG mode. The amount of distortion is read from the graticule scale. DIFF PHASE & DIFF GAIN Measurement Procedure 1. Apply a staircase signal or a ramp signal with subcarrier to the 1780R-Series.
Measurements 4–16 1780R-Series Operator ’ s Manual Noise Measurement Enter Noise Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <NOISE> on the screen. Exit Noise Measurement Mode T o exit Noise mode, push the MEASURE button again.
Measurements 1780R-Series Operator ’ s Manual 4–17 ICPM Measurement Enter ICPM Measurement Mode (Incidental Carrier Phase Modulation) Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <ICPM> on the screen.
Measurements 4–18 1780R-Series Operator ’ s Manual The 1780R-Series ICPM measurement method is similar to the T ektronix 1480-Series method. Refer to the 1450 manual for details on configuring the demodulator for this measurement. The external low-pass filters (T ektronix P/N 015-0352-00) can be used to improve the display .
Measurements 1780R-Series Operator ’ s Manual 4–19 5. The 1780R-Series on-screen readout shows the ICPM phase error in degrees. Figure 4–5: Making ICPM Measurements Measurements 1780R-Series Operator ’ s Manual 4–19 5. The 1780R-Series on-screen readout shows the ICPM phase error in degrees.
Measurements 4–20 1780R-Series Operator ’ s Manual K Factor Measurement Enter K Factor Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <K F ACTOR> on the screen. K F ACTOR is displayed on the left CR T .
Measurements 1780R-Series Operator ’ s Manual 4–21 Left CRT display Right CRT display Figure 4–6: K Factor Electronic Graticule Measurements 1780R-Series Operator ’ s Manual 4–21 Left CRT di.
Measurements 4–22 1780R-Series Operator ’ s Manual T able 4–5: K Factor Front-Panel Configuration VECTORSCOPE Selected by operator W A VEFORM Waveform display enabled, choices locked out INPUT S.
Measurements 1780R-Series Operator ’ s Manual 4–23 Chroma / Luma Inequalities Measurement Enter Chroma / Luma Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1.
Measurements 4–24 1780R-Series Operator ’ s Manual Right CRT display Left CRT display Figure 4–7: Initial Chroma / Luma Inequalities Measurement Screen Measurements 4–24 1780R-Series Operator .
Measurements 1780R-Series Operator ’ s Manual 4–25 T able 4–6: Chroma / Luma Front-Panel Configuration VECTORSCOPE V ector display initially enabled, other choices locked out. Chroma-to-Luma Lissajous display selected by touching <VECTOR / C/Y> area of screen.
Measurements 4–26 1780R-Series Operator ’ s Manual If OTHER was selected on Step 1, this step allows the 1780R-Se- ries instrument to determine the pulse width and adjust the readout accordingly . a. V oltage cursors are automatically set to 50% of the amplitude entered in step 2.
Measurements 1780R-Series Operator ’ s Manual 4–27 Chroma / Luma Measurements with Lissajous Display The Lissajous display is an X/Y plot of the sine-squared luminance pulse versus the sine-squared envelope of the demodulated chrominance.
Measurements 4–28 1780R-Series Operator ’ s Manual Short-Time Distortion Measurement Enter Short-Time Distortion Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <SHOR T -TIME DISTOR TION> on the screen.
Measurements 1780R-Series Operator ’ s Manual 4–29 Left CRT display Right CRT display Figure 4–9: Short-Time Distortion Electronic Graticule Measurements 1780R-Series Operator ’ s Manual 4–2.
Measurements 4–30 1780R-Series Operator ’ s Manual T able 4–7: Short-Time Distortion Mode Front-Panel Configuration VECTORSCOPE Selected by operator W A VEFORM Waveform display enabled, other ch.
Measurements 1780R-Series Operator ’ s Manual 4–31 R–Y Sweep Measurement Enter R–Y Sweep Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <R–Y SWEEP> on the screen. V ectorscope and waveform displays are enabled and the instrument is now configured as shown in T able 4–8.
Measurements 4–32 1780R-Series Operator ’ s Manual Using R–Y Sweep Mode 1. Set the burst to 180 _ on the vector graticule. The R–Y compo- nent of the input signal is viewed on the waveform CR T . 2. Set the front-panel VECT / SCH INPUT selection to SCH, and the SCH Phase component is added to the R–Y display .
Measurements 1780R-Series Operator ’ s Manual 4–33 Bowtie Measurement Use the following information to perform bowtie measurements. Enter Bowtie Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <BOWTIE> on the screen.
Measurements 4–34 1780R-Series Operator ’ s Manual Right CRT display Left CRT display Figure 4–10: Bowtie Measurement Screen Measurements 4–34 1780R-Series Operator ’ s Manual Right CRT disp.
Measurements 1780R-Series Operator ’ s Manual 4–35 T able 4–9: Bowtie Mode Front-Panel Configuration VECTORSCOPE Selected by operator W A VEFORM Parade selected, other choices locked INPUT B1–.
Measurements 4–36 1780R-Series Operator ’ s Manual F SC Time Marks Measurement Enter F SC Time Marks Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. T ouch <FSC TIME MARKS> on the screen. The large knob function is assigned to phase shift.
Measurements 1780R-Series Operator ’ s Manual 4–37 Making SCH Phase Measurements The 1780R-Series offers two methods of measuring SCH phase errors: The polar SCH display , and this F SC T ime Marks (voltage-vs- time) method.
Measurements 4–38 1780R-Series Operator ’ s Manual Other Measurements The 1780R-Series instruments are capable of other measurements not described in this manual, such as Group Delay and Chrominance Non-Linear Phase and Gain.
Specifications Specifications.
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1780R-Series Operator ’ s Manual 5–1 Specifications T able 5–1: Input/Output Characteristics Performance Requirements Supplemental Information V ertical Ranges V olts Full Scale 1.0 Accuracy – 1.0 V ± 0.007 V . P-to-P Amplitude for Full Graticule.
Specifications 5–2 1780R-Series Operator ’ s Manual T able 5–1: Input/Output (Cont.) Characteristics Supplemental Information Performance Requirements Max volts from Loop- Through common terminal to chassis 2 V rms at mains frequency . Rejection ratio of common- to-chassis in floating ground mode, ≥ 34 dB at mains frequency .
Specifications 1780R-Series Operator ’ s Manual 5–3 T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements Crosstalk T ypically 70 dB isolation between channels. Mea- sured at F SC between channels and each channel and EXT REF .
Specifications 5–4 1780R-Series Operator ’ s Manual T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements Cal Amplitude Accuracy 1.00 V ± 0.2%. NTSC 0.714 V ± 0.5%. Resolution 1 mV at 1.
Specifications 1780R-Series Operator ’ s Manual 5–5 T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements V ertical Overscan Baseline Distortion <7 mV variation in baseline of chroma when positioned any- where between sync tip and 100% white.
Specifications 5–6 1780R-Series Operator ’ s Manual T able 5–2: Waveform Monitor V ertical System (Cont.) Characteristics Supplemental Information Performance Requirements Diff Steps (Differentiated Steps Attenuation) >40 dB at 3.58 MHz (4.43 MHz P AL) 5 step, 20 IRE staircase within 2% of flat display .
Specifications 1780R-Series Operator ’ s Manual 5–7 T able 5–3: Waveform Monitor Probe Input Characteristics Performance Requirements Supplemental Information Input Resistance 1 M W . Input RC Product 20 m s (20 pF). Gain Unity 3%. With gain adjusted for equivalent 1 V p-to-p dis- play .
Specifications 5–8 1780R-Series Operator ’ s Manual T able 5–4: W aveform Monitor Horizontal Deflection System (Cont.) Characteristics Supplemental Information Performance Requirements 1 Field Sweep Displays 1 full field includ- ing vertical interval.
Specifications 1780R-Series Operator ’ s Manual 5–9 T able 5–4: W aveform Monitor Horizontal Deflection System (Cont.) Characteristics Supplemental Information Performance Requirements Magnified Sweep Accuracy X5 (1 m s/Div .) ± 1%. A ppli es to th e c e nt er 10 ds s f m f e d X10 (0.
Specifications 5–10 1780R-Series Operator ’ s Manual T able 5–4: W aveform Monitor Horizontal Deflection System (Cont.) Characteristics Supplemental Information Performance Requirements RGB/YRGB Staircase Input Amplitude A +10 V input will result in a horizontal display of 9 divisions ± 1.
Specifications 1780R-Series Operator ’ s Manual 5–1 1 T able 5–5: Waveform Monitor DG and DP Display Characteristics Performance Requirements Supplemental Information Differential Gain Deflection Factor 5% dG deflects the trace 50 IRE (NTSC) or 500 mV (P AL) ± 5%.
Specifications 5–12 1780R-Series Operator ’ s Manual T able 5–5: Waveform Monitor DG and DP Display (Cont.) Characteristics Supplemental Information Performance Requirements Recursive Filter Noise Reduction ≈ 15 dB signal-to-noise reduction with filter se- lected.
Specifications 1780R-Series Operator ’ s Manual 5–13 T able 5–6: Synchronization Characteristics Performance Requirements Supplemental Information Sync Input Internal Ref. Sync Separator 0.2 to 2.0 V peak-to-peak composite video. Composite video applied to Inputs A, B1, B2, or B3 or probe.
Specifications 5–14 1780R-Series Operator ’ s Manual T able 5–6: Synchronization (Cont.) Characteristics Supplemental Information Performance Requirements AFC Sync Horiz. Freq. Range 15.75 kHz ± 200 Hz. Lock-In Time <1 second. Sync Jitter Comp sync or video ≤ 10 n s ; with th e a dd ition o f 36 dB white noise, ≤ 12 ns.
Specifications 1780R-Series Operator ’ s Manual 5–15 T able 5–6: Synchronization (Cont.) Characteristics Supplemental Information Performance Requirements Remote Sync Amplitude 2.0 to 5.0 V square wave, or 4.0 V composite sync. Input enabled through rear-panel REMOTE con- nector .
Specifications 5–16 1780R-Series Operator ’ s Manual T able 5–7: V ectorscope V ector Display (Cont.) Characteristics Supplemental Information Performance Requirements Display V ector Phase Accuracy ± 1.25 _ . Measured with color bar signal. V ector Gain Accuracy ± 2.
Specifications 1780R-Series Operator ’ s Manual 5–17 T able 5–7: V ectorscope V ector Display (Cont.) Characteristics Supplemental Information Performance Requirements V ector Display Differential Phase ≤ 1 _ . Differential Gain ≤ 1%. Measured with 140 IRE (1 V) linearity signal with 40 IRE (300 mV) of subcarrier .
Specifications 5–18 1780R-Series Operator ’ s Manual T able 5–8: V ectorscope XY Display Characteristics Performance Requirements Supplemental Information Input DC coupled differential inputs through rear-panel connector . Input Amplitude 2 to 9 V peak-to-peak.
Specifications 1780R-Series Operator ’ s Manual 5–19 T able 5–9: V ectorscope SCH Phase Display (Cont.) Characteristics Supplemental Information Performance Requirements Input Timing Stable display with any time relationship between sig- nals on CH A, CH B, and EXT .
Specifications 5–20 1780R-Series Operator ’ s Manual T able 5–1 1: Power Requirements Characteristics Performance Requirements Supplemental Information Mains V oltage Ranges 1 10 V AC 90 – 132 V . S e l e ct ed b y re a r- pan e l s 220 V AC 200 – 250 V .
Specifications 1780R-Series Operator ’ s Manual 5–21 T able 5–13: Environmental Summary Characteristics Supplemental Information T emperature Operating 0 _ C to +50 _ C. Non-Operating –55 _ C to +75 _ C. Altitude Operating T o 2 km maximum. Vibration Operating 0.
Specifications 5–22 1780R-Series Operator ’ s Manual T able 5–14: Certifications and compliances EC Declaration of Conformity – EMC 1 Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility .
Specifications 1780R-Series Operator ’ s Manual 5–23 T able 5–14: Certifications and compliances (Cont.) Pollution Degree 1 No pollution or only dry , nonconductive pollution occurs. Products in this category are generally encapsulated, hermetically sealed, or located in clean rooms.
Specifications 5–24 1780R-Series Operator ’ s Manual T able 5–14: Certifications and compliances (Cont.) Altitude (maximum operating) 2000 meters Equipment T ype T est and measuring Safety Class.
Options and Accessories Options and Accessories.
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1780R-Series Operator ’ s Manual 6–1 Options and Accessories Options The Power Cord options are the only currently available options for purchase with the 1780R-Series. Part numbers are listed below . Accessories Standard Accessories The following accessories are shipped with the 1780R-Series.
Options and Accessories 6–2 1780R-Series Operator ’ s Manual One of the following cables is shipped with each instrument: Qty T ek Part Number Description 1 161–0216–00 Cable, Power 1 161–00.
Index Index.
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1780R-Series Operator ’ s Manual Index–1 Index A Absolute units (mV / IRE), 3–54 Accessories, 6–1 Adjustments Calibrator amplitude (zero set), 3–45 External horizontal gain (waveform), 3–4.
Index Index–2 1780R-Series Operator ’ s Manual Coupling (AC / DC / GND), 3–53 CR T controls, 2–1, 2–3 Cursors T ime, 2–5, 3–1 Set interval, 3–45 V oltage, 2–6, 3–2 Units (mV / IRE).
Index 1780R-Series Operator ’ s Manual Index–3 NTSC, 3–6 P AL, 3–7 W aveform NTSC, 3–12 P AL, 3–12 XY graticule scale, 3–9 H Hold for function switches, 2–1 Horizontal gain adjustment (waveform), 3–45 Horizontal position control, 2–5 Horizontal position control calibra- tion, 3–43 How to.
Index Index–4 1780R-Series Operator ’ s Manual Low–pass filter , 2–14 Luminance filter , 2–14 M Magnifier, 2–12 Measurement menu Bowtie, 4–33 Chrominance–to–luminance inequalities, 4.
Index 1780R-Series Operator ’ s Manual Index–5 R Readout (ON / OFF), 3–55 Readout intensity adjustment (vectorscope), 3–46 Readout intensity adjustment (waveform), 3–43 Rear panel connectors.
Index Index–6 1780R-Series Operator ’ s Manual X X–Y input, 2–16 XY / PIX switch, 2–1 1 XY graticule scale, 3–9 Z Zero carrier (ICPM), 4–18 Zero set Calibrator amplitude, 3–45 Phase sh.
デバイスTektronix 1780-Rの購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
Tektronix 1780-Rをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはTektronix 1780-Rの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。Tektronix 1780-Rの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。Tektronix 1780-Rで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
Tektronix 1780-Rを既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はTektronix 1780-Rの不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、Tektronix 1780-Rに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちTektronix 1780-Rデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
