Operator’s Manual Operator’s Manual 1780R-Series Video Measurement Set 1780R-Series Video Measurement Set 070-6890-08 070-6890-08 This document supports firmware version 1.10 to 1.16. This document supports firmware version 1.10 to 1.16.
Copyright © Tektronix, Inc. All rights reserved. Copyright © Tektronix, Inc. All rights reserved. Tektronix 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. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material.
WARRANTY WARRANTY Tektronix 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. If a product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
Contacting Tektronix Product Support Service Support For questions about using Tektronix measurement products, call toll free in North America: 1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Contacting Tektronix Product Support For questions about using Tektronix measurement products, call toll free in North America: 1-800-TEK-WIDE (1-800-835-9433 ext. 2400) 6:00 a.m. – 5:00 p.m. Pacific time Or contact us by e-mail: tm_app_supp@tek.
Table of Contents General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table of Contents xi Getting Started Documentation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operator’s Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . Who Should Use This Operator’s Manual . . . . . .
Table of Contents Table of Contents Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CRT Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Precision Measurement (Large Knob) . . . . . . . . . . . . . . . . . Menu Access Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Display Mode . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents Parade Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Two Line or Field Parade . . . . . . . . . . . . . . . . . . . . . . . . . . . Three Line Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Offset Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Level Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Level Measurement Procedure . . . . . . . . . . . . . . . . . . .
Table of Contents Table of Contents Measure Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Using the Measure Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . Beep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Store and Recall Modified Setups . . . . . . . . . . . . . . . . . . . . Making Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents K Factor Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enter K Factor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Making K Factor Measurements . . . . . . . . . . . . . . . . . . . . . Chroma / Luma Inequalities Measurement . . . . . . . . . . . . . . . . Enter Chroma / Luma Mode . . . . . . . . . . . . . . . . . . . . . . . . Exit Chroma / Luma Mode . . . . . . . . . . . . . . . . . . . . . . . . . Cursors in Chroma / Luma . . . . . . . .
Table of Contents Table of Contents List of Figures List of Figures vi Figure 1–1: Location of the four screws that secure the instrument to rack-mounting cabinet or portable case . 1–5 Figure 1–1: Location of the four screws that secure the instrument to rack-mounting cabinet or portable case . 1–5 Figure 1–2: Dimensions used for rack-mounting the 1780R-Series Video Measurement Set . . . . . . . . . . . . . . .
Table of Contents Table of Contents Figure 3–15: Left Side of Front Panel, showing Menu Buttons and Touch Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–31 Figure 3–15: Left Side of Front Panel, showing Menu Buttons and Touch Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–31 Figure 3–16: Touch Screen 4 X 4 Matrix . . . . . . . . . . . . . . . . 3–33 Figure 3–16: Touch Screen 4 X 4 Matrix . . . . . . . . . . . . . . . .
Table of Contents Table of Contents List of Tables List of Tables viii Table 2–1: Possible Parade and Overlay Configurations . . 2–11 Table 2–1: Possible Parade and Overlay Configurations . . 2–11 Table 2–2: Waveform Magnification . . . . . . . . . . . . . . . . . . . 2–13 Table 2–2: Waveform Magnification . . . . . . . . . . . . . . . . . . . 2–13 Table 2–3: Multiple Filter Displays . . . . . . . . . . . . . . . . . . . . 2–14 Table 2–3: Multiple Filter Displays . . . . . . . . . . . . . . .
Table of Contents Table of Contents Table 5–2: Waveform Monitor Vertical System . . . . . . . . . . 5–2 Table 5–2: Waveform Monitor Vertical System . . . . . . . . . . 5–2 Table 5–3: Waveform Monitor Probe Input . . . . . . . . . . . . . 5–7 Table 5–3: Waveform Monitor Probe Input . . . . . . . . . . . . . 5–7 Table 5–4: Waveform Monitor Horizontal Deflection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents x Table of Contents 1780R-Series Operator’s Manual x 1780R-Series Operator’s Manual
General Safety Summary General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures.
General Safety Summary General Safety Summary Do Not Operate in Wet/Damp Conditions. Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation Provide Proper Ventilation. Refer to the manual’s installation instructions for details on installing the product so it has proper ventilation.
Getting Started Getting Started
Getting Started Getting Started Documentation Overview Documentation Overview This operator’s manual is one of a set of two manuals that document the Tektronix 1780R-Series Video Measurement Set. To purchase a service manual, please refer to the “Contacting Tektronix” page located near the front of this manual for address and phone number information. This operator’s manual is one of a set of two manuals that document the Tektronix 1780R-Series Video Measurement Set.
Getting Started Getting Started Documentation Conventions Documentation Conventions Within this manual, front-panel push-button names are shown all in capitals, such as the PRESET menu button. Touch screen words are represented in brackets, such as . CRT instructional labels, such as SELECT MEASUREMENT, are represented in italics in the manual and on the instrument CRT. Within this manual, front-panel push-button names are shown all in capitals, such as the PRESET menu button.
Getting Started Getting Started 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. 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 Getting Started 1780R-Series Package 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. The instrument is equipped with a high reliability cooling fan so that no clearance is required above or below the 1780R-Series. Mechanical Installation The 1780R-Series is supplied as a single 5 1/4-inch high package, ready for rack-mounting.
Getting Started Getting Started Figure 1–1: Location of the four screws that secure the instrument to rack-mounting cabinet or portable case Figure 1–1: Location of the four screws that secure the instrument to rack-mounting cabinet or portable case WARNING. Do not attempt to carry a cabinetized instrument without installing the rear-panel mounting screws. There is nothing to hold the instrument in the cabinet if it is tipped forward. WARNING.
Getting Started Getting Started Figure 1–2: Dimensions used for rack-mounting the 1780R-Series Video Measurement Set 1–6 1780R-Series Operator’s Manual Figure 1–2: Dimensions used for rack-mounting the 1780R-Series Video Measurement Set 1–6 1780R-Series Operator’s Manual
Getting Started Getting Started Figure 1–3: Dimensions of the adjustable rear rack-mounting bracket Figure 1–3: Dimensions of the adjustable rear rack-mounting bracket To install the instrument in the rack: First remove the four securing screws and take the instrument out of the rack-mounting cabinet. (All 1780R-Series instruments are shipped in the rack-mounting cabinet to provide extra shipping protection.
Getting Started 1–8 Getting Started Figure 1–4: Installing rear rack-mounting brackets for rack applications of depths from 18 to 24 inches 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 screws from the center into the nut bars. NOTE.
Getting Started Options Getting Started Options The 1780R-Series is shipped with a standard U.S. plug, or can be ordered with one of the following options. The 1780R-Series is shipped with a standard U.S. plug, or can be ordered with one of the following options.
Getting Started Getting Started Optional Accessories Optional Accessories The following is a list of the most common accessory items for the 1780R-Series. Part numbers, if applicable, are listed in Section 6. 1–10 The following is a list of the most common accessory items for the 1780R-Series. Part numbers, if applicable, are listed in Section 6.
Connectors, Controls, Indicators Connectors, Controls, Indicators
Connectors, Controls, Indicators Connectors, Controls, Indicators This section provides an overview of control and connector functions. To locate more detailed information, please refer to the manual index or table of contents. This section provides an overview of control and connector functions. To locate more detailed information, please refer to the manual index or table of contents. Switches Switches Push and release the front-panel switches to toggle between selections.
Connectors, Controls, Indicators Connectors, Controls, Indicators Audio Feedback (Beep) Audio Feedback (Beep) A Beep Sounds When: A Beep Sounds When: The limit of a front-panel control range has been reached. 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 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 Front-Panel Controls Connectors, Controls, Indicators Front-Panel Controls NOTE. Locations for the following controls are shown in Figure 2–1. NOTE. Locations for the following controls are shown in Figure 2–1. Power 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. 1. POWER.
Connectors, Controls, Indicators Connectors, Controls, Indicators Figure 2–1: Left side of front panel 2–4 Figure 2–1: Left side of front panel 1780R-Series Operator’s Manual 2–4 1780R-Series Operator’s Manual
Connectors, Controls, Indicators Connectors, Controls, Indicators 7. VERT POS. Use the Vertical 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.) 7. VERT POS. Use the Vertical 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.) 8. HORIZ POS.
Connectors, Controls, Indicators 2–6 Connectors, Controls, Indicators tion or variable sweep is selected, the cursor interval is magnified correspondingly. tion or variable sweep is selected, the cursor interval is magnified correspondingly. To change the large knob assignment from one cursor to another, touch the quadrant labeled . The current assignment is outlined by a box.
Connectors, Controls, Indicators Connectors, Controls, Indicators Different lines can be displayed on the waveform and vectorscope CRTs, when that function is selected via the Line Select menu by touching until is outlined. Different lines can be displayed on the waveform and vectorscope CRTs, when that function is selected via the Line Select menu by touching until is outlined. For software versions 1.
Connectors, Controls, Indicators Connectors, Controls, Indicators Menu Access Switches Menu Access Switches NOTE. Detailed menu information is located in Section 3. 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. 16. PRESET.
Connectors, Controls, Indicators Connectors, Controls, Indicators Probe Probe 20. BNC Connector. This is the input connector for a X1 or X10 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. 21. CAL OUT. This pin jack outputs the calibration signal used to compensate the X10 probe.
Connectors, Controls, Indicators Connectors, Controls, Indicators Figure 2–2: Right side of front panel Figure 2–2: Right side of front panel 2–10 1780R-Series Operator’s Manual 2–10 1780R-Series Operator’s Manual
Connectors, Controls, Indicators Connectors, Controls, Indicators NOTE. The following switch groups are companion switches: VECT / SCH & XY / PIX, PARADE / OVERLAY & WAVEFORM/ WFM + CAL. NOTE. The following switch groups are companion switches: VECT / SCH & XY / PIX, PARADE / OVERLAY & WAVEFORM/ WFM + CAL. Refer to the preceding instructions entitled Companion Switch Example. Locations of the switches are shown in Figure 2–2. Refer to the preceding instructions entitled Companion Switch Example.
Connectors, Controls, Indicators Connectors, Controls, Indicators Table 2–1: Possible Parade and Overlay Configurations (Cont.) Table 2–1: Possible Parade and Overlay Configurations (Cont.
Connectors, Controls, Indicators Connectors, Controls, Indicators and continuously increase the magnification factor. Magnification factors are shown in Table 2–2. Table 2–2: Waveform Magnification and continuously increase the magnification factor. Magnification factors are shown in Table 2–2. Table 2–2: Waveform Magnification msec/Div > Button tton Setting Magnification Magni ication Factor 1 Line 2 Line Off X1 5.
Connectors, Controls, Indicators Connectors, Controls, Indicators 34. WAVEFORM (Control). Use this knob to control the amount of variable gain when VAR is selected. 34. WAVEFORM (Control). Use this knob to control the amount of variable gain when VAR is selected. 35. VECTOR (Control). Use this knob to control the amount of variable gain when VAR is selected. 35. VECTOR (Control). Use this knob to control the amount of variable gain when VAR is selected. 36. VAR / MAX (Switch).
Connectors, Controls, Indicators Connectors, Controls, Indicators NOTE. The three INPUT switches are companion switches. Refer to the preceding Companion Switch Example. NOTE. The three INPUT switches are companion switches. Refer to the preceding Companion Switch Example. Input 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 Connectors, Controls, Indicators Rear Panel Connectors Rear Panel Connectors 2–16 Connectors CH A, CH B1, CH B2, CH B3, EXT REF, and CW are high impedance bridging loop-through inputs. CH A, CH B1, CH B2, and CH B3 have either a grounded or floating shield, depending on the position of the grounding screw, which is located between the BNC connectors. Connectors CH A, CH B1, CH B2, CH B3, EXT REF, and CW are high impedance bridging loop-through inputs.
Connectors, Controls, Indicators Connectors, Controls, Indicators Figure 2–3: Rear-Panel Connectors 1780R-Series Operator’s Manual Figure 2–3: Rear-Panel Connectors 2–17 1780R-Series Operator’s Manual 2–17
Connectors, Controls, Indicators 2–18 Connectors, Controls, Indicators 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). 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.
Operating Instructions Operating Instructions
Operating Instructions Operating Instructions Large Knob And Associated Switches Large Knob And Associated Switches Timing Cursors Timing Cursors Push the TIME switch to enable the timing cursors and obtain a menu on the vectorscope CRT. Use this menu to choose cursors that track together or are positioned separately, and to choose between locate and measure. Push the TIME switch to enable the timing cursors and obtain a menu on the vectorscope CRT.
Operating Instructions Operating Instructions 3–2 For software versions 1.13 and up, installed in instruments SN B020100 and up: The Timing Cursor dots are positioned on the Voltage Cursors while in Line Select mode, for ease in viewing the Timing Cursors. For software versions 1.13 and up, installed in instruments SN B020100 and up: The Timing Cursor dots are positioned on the Voltage Cursors while in Line Select mode, for ease in viewing the Timing Cursors.
Operating Instructions Operating Instructions For software versions 1.13 and up, installed in instruments SN B020100 and up: Voltage cursors are automatically enabled when in Line Select with Timing Cursors. For software versions 1.13 and up, installed in instruments SN B020100 and up: Voltage cursors are automatically enabled when in Line Select with Timing Cursors. Line Select Line Select This switch enables the line select function, which is available for both waveform and vectorscope.
Operating Instructions Operating Instructions 3–4 Figure 3–1: Line Select Menu Screen with <2 OF 4> Fields selected Figure 3–1: Line Select Menu Screen with <2 OF 4> Fields selected The waveform and vectorscope CRTs can be used to display the same selected line or different lines. To display different lines, enable the Line Select menu, then touch until is outlined. Be sure that both and show outlined.
Operating Instructions Operating Instructions Figure 3–2: Line Select Menu Screen with <1 OF 8> Fields selected Figure 3–2: Line Select Menu Screen with <1 OF 8> Fields selected For software versions 1.13 and up: A dual Line Select mode is available for making ICPM measurements when in Line Select. It is described in Section 4, under ICPM Measurement. For software versions 1.13 and up: A dual Line Select mode is available for making ICPM measurements when in Line Select.
Operating Instructions Operating Instructions Knob Knob The Precision Measurement control (large knob) provides analog precision adjustments associated with the REFERENCE SET, LINE SELECT, PHASE, TIMING CURSOR, and VOLTAGE CURSOR switches, or as assigned by menu selections. The Precision Measurement control (large knob) provides analog precision adjustments associated with the REFERENCE SET, LINE SELECT, PHASE, TIMING CURSOR, and VOLTAGE CURSOR switches, or as assigned by menu selections.
Operating Instructions Operating Instructions Figure 3–3: 1780R Vector Graticule Figure 3–3: 1780R Vector Graticule The graticule includes four burst amplitude marks: 75% with setup, 75% with no setup, 100% with setup, and 100% with no setup. The graticule includes four burst amplitude marks: 75% with setup, 75% with no setup, 100% with setup, and 100% with no setup.
Operating Instructions Operating Instructions 3–8 amplitude centered around 100% standard amplitude. The dimensions of the smaller inner target represent ±3_ and ±5% of chrominance amplitude. Note that the chrominance vectors associated with the –V burst are terminated in the smaller targets only. amplitude centered around 100% standard amplitude. The dimensions of the smaller inner target represent ±3_ and ±5% of chrominance amplitude.
Operating Instructions Operating Instructions 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. 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 Operating Instructions 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 Vertical (X and Y) Amplifiers. They are balanced (differential), DC-coupled, high impedance (>20 kW), un-terminated inputs provided for audio applications. If AC coupling is desired, external capacitors are required.
Operating Instructions 15 9 8 1 Pin Number Function 1 –X Input 2 Operating Instructions Pin Number Function 1 –X Input No Connection 2 No Connection 3 +X Input 3 +X Input 4 No Connection 4 No Connection 5 –Y Input 5 –Y Input 6 No Connection 6 No Connection 7 +Y Input 7 +Y Input 8 No Connection 8 No Connection 9 –X Input 9 –X Input 10 Ground 10 Ground 11 +X High Gain Input 11 +X High Gain Input 12 Ground 12 Ground 13 –Y Input 13 –Y Input 14 No Co
Operating Instructions Operating Instructions 3–12 Using The Waveform Graticule Using The Waveform Graticule Basic Waveform Graticule Markings. The two basic 1780R-Series internal waveform graticules are the NTSC and PAL graticules. The NTSC graticule is shown in Figure 3–6, and the PAL graticule is shown in Figure 3–7. External graticules (short time distortion for NTSC and CCIR / K-factor for PAL) are also available in full scale and in a 3% reduced photo version. Basic Waveform Graticule Markings.
Operating Instructions Operating Instructions Figure 3–7: 1781R Waveform Graticule Figure 3–7: 1781R Waveform Graticule Graticule horizontal scales are divided into 12.7 divisions along the horizontal line at blanking level. The vertical graduations are scaled according to measuring units and ranges unique to each system – mV for the CCIR graticule, and IRE units and percent modulation for NTSC. A mV scale has been added to the NTSC graticule to facilitate component measurements.
Operating Instructions Operating Instructions 3–14 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. (When the X5 setting is selected, the graticule marks correspond to ±0.4% and ±1%.) 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.
Operating Instructions Operating Instructions Remote Operation Remote Operation REMOTE Connector 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 +0.8 V). Pin assignments for the REMOTE connector are shown in Figure 3–8 and Table 3–2. The REMOTE connector appears in the 1780R-Series Service Manual, Section 11, UART and A/D Schematic Diagram.
Operating Instructions Operating Instructions a. To recall a preset, force the corresponding remote line low. a. To recall a preset, force the corresponding remote line low. b. To store a front-panel configuration at a preset location, apply a low first to the Store line (pin 11) and then to the desired preset. Alternately, the Store line and desired preset line may be forced low simultaneously. b.
Operating Instructions Operating Instructions Table 3–2: Remote Pin Functions (Cont.) Pin Name 9 Ground 10 Remote Sync Input 11 / Store 12 / Preset 8 Table 3–2: Remote Pin Functions (Cont.) Function Pin Name Function 9 Ground 5 kW input impedance to ground. Polarity set by jumper A2J192. Factory set for positive polarity. 10 Remote Sync Input 5 kW input impedance to ground. Polarity set by jumper A2J192. Factory set for positive polarity. Low = Store. 11 / Store Low = Store.
Operating Instructions Operating Instructions Serial Communications Interface Serial Communications Interface Serial Interface Connector Serial Interface Connector The rear-panel SERIAL interface connector is a 9-pin, sub-miniature, D-type connector. It is used as an RS422A or RS232D interface to the 1780R-Series microcontroller. Drivers for both interfaces are resident. RS422A is a balanced voltage digital interface, and RS232D is a serial binary data interchange.
Operating Instructions 9-Pin Male Connector Operating Instructions 9-Pin Male Connector Figure 3–10: Serial Interface Connector Wiring Converter Figure 3–10: Serial Interface Connector Wiring Converter Serial Remote Information Serial Remote Information 1780R-Series instrument configurations can be stored at (and retrieved from) a remote location. To accomplish this, the 1780R-Series is connected to a host computer through a serial port that supports RS-232 or RS-422 standards.
Operating Instructions Operating Instructions Table 3–3: Serial Remote Commands to the 1780R-Series Table 3–3: Serial Remote Commands to the 1780R-Series Command* Function Results Command* Function Results #U or #u UPLOAD 1780R-Series sends a stream of data, representing the current instrument configuration, to the host computer. #U or #u UPLOAD 1780R-Series sends a stream of data, representing the current instrument configuration, to the host computer.
Operating Instructions 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. SCH Display Operating Instructions 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.
Operating Instructions 3–22 Operating Instructions 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. 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.
Operating Instructions Parade Operation Operating Instructions Parade Operation NOTE. Switch function is further described in Section 2. NOTE. Switch function is further described in Section 2. Select the Parade mode of operation by pushing the PARADE/ OVERLAY button, shown in Figure 3–11, until the Parade LED lights. Two pushes may be required, depending on the previous condition.
Operating Instructions Operating Instructions 3–24 Figure 3–12: Offsets Menu Screen Figure 3–12: Offsets Menu Screen To obtain Offset menu, touch until is outlined. To obtain Offset menu, touch until is outlined. Touch until is outlined, and touch CHB2 or CHB3 to assign large knob function to desired offset. Large knob assignment will be circled.
Operating Instructions Operating Instructions DC Level Measurement Procedure DC Level Measurement Procedure 1. Enter the Parade mode. Press the CONFIGURE button and then use the vectorscope touch screen to select under the area. Press the CH B1 / CH B2 / CH B3 switch to go to Three Line. 1. Enter the Parade mode. Press the CONFIGURE button and then use the vectorscope touch screen to select under the area. Press the CH B1 / CH B2 / CH B3 switch to go to Three Line. 2.
Operating Instructions Operating Instructions Overlay Operation Overlay Operation NOTE. Switch function is further described in Section 2. NOTE. Switch function is further described in Section 2. Select the Overlay mode of operation by pushing the PARADE/ OVERLAY button, shown in Figure 3–11, until the Overlay LED lights. Two pushes may be required, depending on the previous condition.
Operating Instructions WFM + CAL Operating Instructions WFM + CAL NOTE. Switch function is further described in Section 2. NOTE. Switch function is further described in Section 2. Enter WFM+CAL Mode Enter WFM+CAL Mode Select the WFM+CAL mode of operation by pushing the WFM / WFM+CAL button, shown in Figure 3–11, until the WFM+CAL LED lights. Two pushes may be required, depending on the previous condition.
Operating Instructions Operating Instructions Figure 3–13: WFM + CAL Readout with ABS selected Figure 3–13: WFM + CAL Readout with ABS selected Figure 3–14: WFM + CAL Readout with REL selected 3–28 1780R-Series Operator’s Manual Figure 3–14: WFM + CAL Readout with REL selected 3–28 1780R-Series Operator’s Manual
Operating Instructions Operating Instructions When operating in the mode, software versions 1.11 & Up provide a choice of absolute or relative readouts. When is selected, the readout appears in IRE or mV. (For an IRE readout, must be selected on page 2 of the Configure menu.) When is selected, the readout is given in both dB and percentage (%) values, relative to a reference that is selected by pushing the REF SET button. (Software versions below 1.
Operating Instructions 3–30 Operating Instructions 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. 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 0.00 dB and 100.0%. 3. Push the REF SET button and obtain a CAL readout of 0.00 dB and 100.0%. 4.
Operating Instructions Operating Instructions equal that value when the back porch of one display is aligned with the white bar of the second display. 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 PAL) can be used to adjust component levels for component video. c. The 700 mV (98.0 IRE) calibrator amplitude (NTSC and PAL) can be used to adjust component levels for component video. d.
Operating Instructions Operating Instructions 3–32 Many selections are made by touching the desired word on the CRT 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). Many selections are made by touching the desired word on the CRT 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 Operating Instructions Figure 3–16: Touch Screen 4 X 4 Matrix Figure 3–16: Touch Screen 4 X 4 Matrix The touch screens are light sensitive, so it is not necessary to apply pressure. 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. If it is necessary to adjust quadrant center points, refer to the 1780R-Series Service Manual.
Operating Instructions Operating Instructions Password Menu Password Menu Figure 3–17: Password Menu Screen Figure 3–17: Password Menu Screen 3–34 Enable / Disable the Password Enable / Disable the Password To enable password operation, place button #2 of S385 (MPU board) in the closed position. Turn the instrument power to standby and back to on for the microprocessor to recognize the new switch setting. Disable in the same manner, placing button #2 in the open position.
Operating Instructions Operating Instructions 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. 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 Change the Password Move button #2 of S385 (MPU board) to the open position to disable password operation.
Operating Instructions Operating Instructions Preset Menu Preset Menu Figure 3–18: Preset Menu Screen Figure 3–18: Preset Menu Screen Recall Recall Recall Preset Settings. Push PRESET button to enter Preset menu, shown in Figure 3–18. Recall Preset Settings. Push PRESET button to enter Preset menu, shown in Figure 3–18. Recall desired preset by touching the preset name. Recall desired preset by touching the preset name. Example: . 3–36 Example: .
Operating Instructions Operating Instructions 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 Operating Instructions Table 3–5: Initial Settings (Cont.) Table 3–5: Initial Settings (Cont.
Operating Instructions Operating Instructions 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. 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. To recover saved configuration, push the PRESET button again, and then touch .
Operating Instructions Operating Instructions Name Name Renaming a PRESET: Renaming a PRESET: H Push the PRESET button to enter Preset menu. H Push the PRESET button to enter Preset menu. H Touch . If password is enabled, enter the password now. H Touch . If password is enabled, enter the password now. H is added to the display. , , , and are omitted. H is added to the display.
Operating Instructions Figure 3–19: Name Menu Screen 1780R-Series Operator’s Manual Operating Instructions Figure 3–19: Name Menu Screen 3–41 1780R-Series Operator’s Manual 3–41
Operating Instructions Operating Instructions Calibrate Menu Calibrate Menu 3–42 General Calibration Menu Information General Calibration Menu Information The Calibrate menu is available for both vector and waveform, and uses both CRTs. The Calibrate menu is available for both vector and waveform, and uses both CRTs. Pushing the front-panel CALIBRATE button provides access to the menu. Several calibration features (such as Readout Intensity) can be selected using the touch screen menu.
Operating Instructions Operating Instructions Waveform Calibration Procedure Waveform Calibration Procedure 1. Apply a video signal to a 1780R-Series input channel and select that channel for display. 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 until 1000 (1.0 volt) is outlined. 2. Push the front-panel CONFIGURE button and touch until 1000 (1.0 volt) is outlined. 3.
Operating Instructions Right CRT display Left CRT display Left CRT display Right CRT display Operating Instructions Figure 3–20: Waveform Calibration Menu Display 3–44 1780R-Series Operator’s Manual Figure 3–20: Waveform Calibration Menu Display 3–44 1780R-Series Operator’s Manual
Operating Instructions Operating Instructions 7. Touch to obtain a menu on the waveform CRT 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. 7. Touch to obtain a menu on the waveform CRT for adjusting the calibrator zero level. Adjust the large knob to overlay the two calibrator waveforms.
Operating Instructions Operating Instructions i. Touch . 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. 3–46 i. Touch . 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).
Left CRT display Right CRT display Operating Instructions Left CRT display Right CRT display Operating Instructions Figure 3–21: Vectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.11 & Up, with CAL OSC Off Figure 3–21: Vectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.
3–48 Left CRT display Left CRT display Right CRT display Operating Instructions Right CRT display Operating Instructions Figure 3–22: Vectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.11 & Up, with CAL OSC On Figure 3–22: Vectorscope Calibration Menu Display for 1780R (NTSC), software versions 1.
Operating Instructions Operating Instructions For 1781R (PAL), touch and use the large knob to make the circle match the compass rose. b. Touch until is outlined. For 1781R (PAL), touch and use the large knob to make the circle match the compass rose. b. Touch until is outlined. 6. To check the Vectorscope Gain adjustment, push the front-panel CALIBRATE button to enter the Calibration menu, then push the button under the left CRT. 6.
Operating Instructions 3–50 Right CRT display Right CRT display Left CRT display Left CRT display Operating Instructions Figure 3–23: Vectorscope Calibration Menu Display for 1781R (PAL) all software versions, and for 1780R (NTSC) software versions 1.10 & Below Figure 3–23: Vectorscope Calibration Menu Display for 1781R (PAL) all software versions, and for 1780R (NTSC) software versions 1.
Operating Instructions Operating Instructions 3. 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. Readout intensity must be adjusted through the Calibration menu.) 3. 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 Operating Instructions Configure Menu Configure Menu Changing Configurations Changing Configurations Push the CONFIGURE button to enter the Configure menu. Push the CONFIGURE button to enter the Configure menu. All front-panel controls remain operational during Configure menu operation. 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 Operating Instructions Left CRT display Left CRT display Figure 3–24: Configure Menu Screen, page 1 Figure 3–24: Configure Menu Screen, page 1 Table 3–6: Configure Menu Selections, page 1 Table 3–6: Configure Menu Selections, page 1 SYNC Direct or Auto Frequency Controlled wfm sync. SYNC Direct or Auto Frequency Controlled wfm sync. COUPLING AC / DC coupling or ground reference, sets all four inputs. (The probe input is always AC coupled.
Operating Instructions Operating Instructions Left CRT display Left CRT display Figure 3–25: Configure Menu Screen, page 2 Table 3–7: Configure Menu Selections, page 2 Figure 3–25: Configure Menu Screen, page 2 Table 3–7: Configure Menu Selections, page 2 BARS Vectorscope can be calibrated to 75% or 100% color bars. BARS Vectorscope can be calibrated to 75% or 100% color bars. PHASE DISPLAY 360 = Phase reads from 0_ to 360_. 180 = Phase reads from +180_ to –179.95_.
Operating Instructions Operating Instructions Left CRT display Left CRT display Figure 3–26: Configure Menu Screen, page 3 Figure 3–26: Configure Menu Screen, page 3 Table 3–8: Configure Menu Selections, page 3 Table 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. CW SYNC When CW subcarrier is used for vectorscope reference, wfm sync source can be INT or EXT.
Operating Instructions Operating Instructions Measure Menu Measure Menu Left CRT display Left CRT display Figure 3–27: Measure Menu Screen Figure 3–27: Measure Menu Screen Using the Measure Menu Using the Measure Menu Push the front-panel MEASURE button to enter the Measurement menu, illustrated in Figure 3–27. Push the front-panel MEASURE button to enter the Measurement menu, illustrated in Figure 3–27. To select a measurement type, touch the desired measurement on the screen.
Operating Instructions Operating Instructions Front-panel and menu settings are automatically adjusted to accommodate the selected measurement. Front-panel and menu settings are automatically adjusted to accommodate the selected measurement. To exit a measurement mode, push the front-panel MEASURE button. In the case of DIFF PHASE and DIFF GAIN measurements, touch and areas of the screen to alternate between those two measurements.
Operating Instructions Operating Instructions 3–58 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. Both Preset and Measure LEDs will be on. 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
Measurements Measurements Measurement Information Measurement Information Figure 4–1: Measure Menu Access Figure 4–1: Measure Menu Access NOTE. The measurements described in this section are accessed through the Measurement menu, shown in Figure 4–1. NOTE. The measurements described in this section are accessed through the Measurement menu, shown in Figure 4–1. Push the front-panel MEASURE button to enable the Measurement menu. Push the front-panel MEASURE button to enable the Measurement menu.
Measurements Measurements measurements, touch the and areas of the screen to alternate between those two measurement modes. measurements, touch the and areas of the screen to alternate between those two measurement modes. To perform additional measurements, push the MEASURE button and touch the next desired measurement. To perform additional measurements, push the MEASURE button and touch the next desired measurement.
Measurements Measurements Right CRT display Right CRT display Left CRT display Left CRT display Figure 4–2: Differential Phase Measurement 1780R-Series Operator’s Manual Figure 4–2: Differential Phase Measurement 4–3 1780R-Series Operator’s Manual 4–3
Measurements Measurements Table 4–1: DIFF PHASE Front-Panel Configuration Table 4–1: DIFF PHASE Front-Panel Configuration VECTORSCOPE Vector display enabled, other choices locked out. VECTORSCOPE Vector display enabled, other choices locked out. WAVEFORM R–Y sweep displayed, all front-panel choices locked out. (There is no LED to indicate R–Y sweep.) WAVEFORM R–Y sweep displayed, all front-panel choices locked out. (There is no LED to indicate R–Y sweep.) INPUT Status does not change.
Measurements Measurements NOTE. Freeze only available with Noise Reduction ON. NOTE. Freeze only available with Noise Reduction ON. Freeze. To capture the display (right CRT only), touch so that is outlined, then touch . will be outlined. REDUCTION> so that is outlined, then touch . will be outlined.
Measurements 4–6 Measurements 3. Use the vectorscope variable gain control to set the amplitude of the chroma to be measured to the edge of the compass rose. 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. See Figure 4–3. 4. Use the large knob to set the phase of the chroma to be measured to the nine o’clock position.
Measurements Measurements 2. Line Select readout is provided on the waveform CRT. Make sure the Line number is circled. If it is not, touch the screen in that area. 2. Line Select readout is provided on the waveform CRT. Make sure the Line number is circled. If it is not, touch the screen in that area. 3. Touch
Measurements Measurements Right CRT display Right CRT display Left CRT display Left CRT display Figure 4–3: Differential Gain Measurement 4–8 1780R-Series Operator’s Manual Figure 4–3: Differential Gain Measurement 4–8 1780R-Series Operator’s Manual
Measurements Table 4–2: DIFF GAIN Front-Panel Configuration Measurements Table 4–2: DIFF GAIN Front-Panel Configuration VECTORSCOPE Vector display enabled, other choices locked out. VECTORSCOPE Vector display enabled, other choices locked out. WAVEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.) WAVEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.
Measurements Measurements 4–10 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 method, including touching , pushing any of the four front-panel menu buttons, pushing the front-panel LINE SELECT button to enter Line Select mode, changing the selected line if already in Line Select mode, or turning instrument power off.
Measurements Measurements 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 CRT); 1 major division = 1% (10 IRE NTSC or 100 mV PAL). 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 CRT); 1 major division = 1% (10 IRE NTSC or 100 mV PAL).
Measurements Measurements Simultaneous Diff Phase & Diff Gain Measurements Simultaneous Diff Phase & Diff Gain Measurements 4–12 Enter DP & DG Mode Enter DP & DG Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen to enable simultaneous differential phase and differential gain measurements.
Measurements Measurements Right CRT display Right CRT display Left CRT display Left CRT display Figure 4–4: DP & DG Measurement 1780R-Series Operator’s Manual Figure 4–4: DP & DG Measurement 4–13 1780R-Series Operator’s Manual 4–13
Measurements Measurements Table 4–3: DP & DG Front-Panel Configuration Table 4–3: DP & DG Front-Panel Configuration VECTORSCOPE Vector display enabled, other choices locked out. VECTORSCOPE Vector display enabled, other choices locked out. WAVEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.) WAVEFORM Demodulated sweep displayed, all front-panel choices locked out. (There is no LED to indicate demodulated sweep.
Measurements Measurements settings will be stored and recalled at next entry to DP & DG mode. The amount of distortion is read from the graticule scale. 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 DIFF PHASE & DIFF GAIN Measurement Procedure 1. Apply a staircase signal or a ramp signal with subcarrier to the 1780R-Series. 1.
Measurements Measurements Noise Measurement Noise Measurement 4–16 Enter Noise Measurement Mode Enter Noise Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen. Exit Noise Measurement Mode Exit Noise Measurement Mode To exit Noise mode, push the MEASURE button again. All instrument settings return to their previous state.
Measurements ICPM Measurement Measurements ICPM Measurement Enter ICPM Measurement Mode Enter ICPM Measurement Mode (Incidental Carrier Phase Modulation) (Incidental Carrier Phase Modulation) Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen. The instrument is now configured as specified in Table 4–4.
Measurements 4–18 Measurements The 1780R-Series ICPM measurement method is similar to the Tektronix 1480-Series method. Refer to the 1450 manual for details on configuring the demodulator for this measurement. The external low-pass filters (Tektronix P/N 015-0352-00) can be used to improve the display. The 1780R-Series ICPM measurement method is similar to the Tektronix 1480-Series method. Refer to the 1450 manual for details on configuring the demodulator for this measurement.
Measurements Measurements 5. The 1780R-Series on-screen readout shows the ICPM phase error in degrees. Figure 4–5: Making ICPM Measurements 1780R-Series Operator’s Manual 5. The 1780R-Series on-screen readout shows the ICPM phase error in degrees.
Measurements Measurements K Factor Measurement K Factor Measurement Enter K Factor Mode Enter K Factor Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen. K FACTOR is displayed on the left CRT. The input signal and electronic graticule are displayed on the right CRT. K FACTOR is displayed on the left CRT.
Measurements Measurements Right CRT display Right CRT display Left CRT display Left CRT display Figure 4–6: K Factor Electronic Graticule Figure 4–6: K Factor Electronic Graticule 1780R-Series Operator’s Manual 4–21 1780R-Series Operator’s Manual 4–21
Measurements Measurements Table 4–5: K Factor Front-Panel Configuration Table 4–5: K Factor Front-Panel Configuration VECTORSCOPE Selected by operator VECTORSCOPE Selected by operator WAVEFORM Waveform display enabled, choices locked out WAVEFORM Waveform display enabled, choices locked out INPUT Selected by operator INPUT Selected by operator REFERENCE Status does not change REFERENCE Status does not change FILTER Status does not change FILTER Status does not change WFM SWEEPS One
Measurements Chroma / Luma Inequalities Measurement Measurements Chroma / Luma Inequalities Measurement Enter Chroma / Luma Mode Enter Chroma / Luma Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen. Vectorscope and waveform displays are enabled and the instrument is now configured as shown in Figure 4–7 and Table 4–6.
Measurements Measurements Right CRT display Right CRT display Left CRT display Left CRT display Figure 4–7: Initial Chroma / Luma Inequalities Measurement Screen 4–24 1780R-Series Operator’s Manual Figure 4–7: Initial Chroma / Luma Inequalities Measurement Screen 4–24 1780R-Series Operator’s Manual
Measurements Measurements Table 4–6: Chroma / Luma Front-Panel Configuration Table 4–6: Chroma / Luma Front-Panel Configuration VECTORSCOPE Vector display initially enabled, other choices locked out. Chroma-to-Luma Lissajous display selected by touching area of screen. VECTORSCOPE Vector display initially enabled, other choices locked out. Chroma-to-Luma Lissajous display selected by touching area of screen. WAVEFORM Waveform display enabled, other choices locked out.
Measurements Measurements If OTHER was selected on Step 1, this step allows the 1780R-Series instrument to determine the pulse width and adjust the readout accordingly. If OTHER was selected on Step 1, this step allows the 1780R-Series instrument to determine the pulse width and adjust the readout accordingly. a. Voltage cursors are automatically set to 50% of the amplitude entered in step 2. a. Voltage cursors are automatically set to 50% of the amplitude entered in step 2. b.
Measurements Measurements Chroma / Luma Measurements with Lissajous Display 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. This display is useful when signals have previously been transcoded into a component format, so that R–Y and B–Y may be unequally delayed with respect to luminance.
Measurements Measurements Short-Time Distortion Measurement Short-Time Distortion Measurement 4–28 Enter Short-Time Distortion Mode Enter Short-Time Distortion Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen.
Measurements Measurements Right CRT display Right CRT display Left CRT display Left CRT display Figure 4–9: Short-Time Distortion Electronic Graticule 1780R-Series Operator’s Manual Figure 4–9: Short-Time Distortion Electronic Graticule 4–29 1780R-Series Operator’s Manual 4–29
Measurements Measurements Table 4–7: Short-Time Distortion Mode Front-Panel Configuration Table 4–7: Short-Time Distortion Mode Front-Panel Configuration VECTORSCOPE Selected by operator VECTORSCOPE Selected by operator WAVEFORM Waveform display enabled, other choices may be selected by operator WAVEFORM Waveform display enabled, other choices may be selected by operator INPUT Status does not change INPUT Status does not change REFERENCE Status does not change REFERENCE Status does not ch
Measurements R–Y Sweep Measurement Measurements R–Y Sweep Measurement Enter R–Y Sweep Mode Enter R–Y Sweep Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen. Vectorscope and waveform displays are enabled and the instrument is now configured as shown in Table 4–8.
Measurements 4–32 Measurements Using R–Y Sweep Mode Using R–Y Sweep Mode 1. Set the burst to 180_ on the vector graticule. The R–Y component of the input signal is viewed on the waveform CRT. 1. Set the burst to 180_ on the vector graticule. The R–Y component of the input signal is viewed on the waveform CRT. 2. Set the front-panel VECT / SCH INPUT selection to SCH, and the SCH Phase component is added to the R–Y display.
Measurements Measurements Bowtie Measurement Bowtie Measurement Use the following information to perform bowtie measurements. Use the following information to perform bowtie measurements. Enter Bowtie Measurement Mode Enter Bowtie Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen. BOWTIE is displayed on the left CRT.
Measurements Measurements Right CRT display Right CRT display Left CRT display Left CRT display Figure 4–10: Bowtie Measurement Screen 4–34 1780R-Series Operator’s Manual Figure 4–10: Bowtie Measurement Screen 4–34 1780R-Series Operator’s Manual
Measurements Table 4–9: Bowtie Mode Front-Panel Configuration Measurements Table 4–9: Bowtie Mode Front-Panel Configuration VECTORSCOPE Selected by operator VECTORSCOPE Selected by operator WAVEFORM Parade selected, other choices locked WAVEFORM Parade selected, other choices locked INPUT B1–B2 & B1–B3 selected, other choices locked INPUT B1–B2 & B1–B3 selected, other choices locked REFERENCE Status does not change REFERENCE Status does not change FILTER Status does not change FILTER
Measurements Measurements FSC Time Marks Measurement FSC Time Marks Measurement Enter FSC Time Marks Measurement Mode Enter FSC Time Marks Measurement Mode Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Push the MEASURE button to enable the Measurement menu, shown in Figure 4–1. Touch on the screen. Touch on the screen. The large knob function is assigned to phase shift. The large knob function is assigned to phase shift.
Measurements Measurements Making SCH Phase Measurements Making SCH Phase Measurements The 1780R-Series offers two methods of measuring SCH phase errors: The polar SCH display, and this FSC Time Marks (voltage-vstime) method. The FSC time marks display is more direct than the polar display, and affords the operator more manual control, but may provide a less precise measurement. To ensure an accurate measurement, both methods can be used.
Measurements Measurements Other Measurements 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. These measurements and others are covered in the book, Television Measurements, available through Tektronix Customer Support.
Specifications Specifications
Specifications Specifications Table 5–1: Input/Output Table 5–1: Input/Output Characteristics Performance Requirements Supplemental Information Characteristics Vertical Ranges Supplemental Information Accuracy – 1.0 V ±0.007 V. P-to-P Amplitude for Full Graticule. Vertical Ranges Volts Full Scale 1.0 Performance Requirements Volts Full Scale Accuracy – 1.0 V ±0.007 V. P-to-P Amplitude for Full Graticule. 1.0 1.0 volt / 140 IRE. 1.0 volt / 140 IRE. ≤0.5:1 to ≥1.5:1 (0.67 V to 2.
Specifications Specifications Table 5–1: Input/Output (Cont.) Table 5–1: Input/Output (Cont.) Characteristics Max volts from LoopThrough common terminal to chassis Performance Requirements Supplemental Information 2 V rms at mains frequency. Rejection ratio of commonto-chassis in floating ground mode, ≥34 dB at mains frequency. Max DC Output Voltage Max volts from LoopThrough common terminal to chassis Performance Requirements Supplemental Information 2 V rms at mains frequency.
Specifications Table 5–2: Waveform Monitor Vertical System (Cont.) Characteristics Performance Requirements Crosstalk Table 5–2: Waveform Monitor Vertical System (Cont.) Supplemental Information Characteristics Typically 70 dB isolation between channels. Measured at FSC between channels and each channel and EXT REF. Frequency Response Flat (X1) From 50 kHz Reference: Input Ch A, B1, B2, & B3 ±1%. AUX IN, AUX OUT ±2%. 5 MHz – 10 MHz Input Ch A +1%.
Specifications Specifications Table 5–2: Waveform Monitor Vertical System (Cont.) Table 5–2: Waveform Monitor Vertical System (Cont.) Characteristics Performance Requirements Supplemental Information Cal Amplitude Performance Requirements Supplemental Information Cal Amplitude Accuracy 1.00 V ±0.2%. NTSC 0.714 V ±0.5%. Accuracy 1.00 V ±0.2%. NTSC 0.714 V ±0.5%. Resolution 1 mV at 1.00 V. PAL 0.700 V ±0.5%. Resolution 1 mV at 1.00 V. PAL 0.700 V ±0.5%.
Specifications Table 5–2: Waveform Monitor Vertical System (Cont.) Characteristics Performance Requirements Table 5–2: Waveform Monitor Vertical System (Cont.) Supplemental Information Characteristics Vertical Overscan Baseline Distortion Performance Requirements Supplemental Information <7 mV variation in baseline of chroma when positioned anywhere between sync tip and 100% white. 1 V p-to-p PAL or NTSC Modulated Sin2 composite video signal (12.5T NTSC, 10T PAL).
Specifications Specifications Table 5–2: Waveform Monitor Vertical System (Cont.) Table 5–2: Waveform Monitor Vertical System (Cont.) Characteristics Diff Steps (Differentiated Steps Attenuation) Performance Requirements Supplemental Information >40 dB at 3.58 MHz (4.43 MHz PAL) 5 step, 20 IRE staircase within 2% of flat display. Vertical Gain increase approximately 5X to compare staircase risers.
Specifications Table 5–3: Waveform Monitor Probe Input Table 5–3: Waveform Monitor Probe Input Supplemental Information Characteristics Input Resistance 1 MW. Input Resistance 1 MW. Input RC Product 20 ms (20 pF). Input RC Product 20 ms (20 pF). With gain adjusted for equivalent 1 V p-to-p display. Gain Characteristics Gain Performance Requirements Specifications Unity 3%. Frequency Response Supplemental Information Unity 3%. With gain adjusted for equivalent 1 V p-to-p display.
Specifications Specifications Table 5–4: Waveform Monitor Horizontal Deflection System (Cont.) Table 5–4: Waveform Monitor Horizontal Deflection System (Cont.) Characteristics Performance Requirements Supplemental Information Performance Requirements Supplemental Information 1 Field Sweep Displays 1 full field including vertical interval. 1 Field Sweep Displays 1 full field including vertical interval. 2 Field Sweep Displays 2 full fields and the vertical interval between them.
Specifications Table 5–4: Waveform Monitor Horizontal Deflection System (Cont.) Characteristics Performance Requirements Specifications Table 5–4: Waveform Monitor Horizontal Deflection System (Cont.) Supplemental Information Performance Requirements Supplemental Information X5 (1 ms/Div.) ±1%. X10 (0.5 ms/Div.) ±2%. X20 (0.25 ms/Div.) ±3%. X25 (0.2 ms/Div.) ±3%. Applies to the center 10 d s s off unmagnified divisions m f ed sweep.
Specifications Specifications Table 5–4: Waveform Monitor Horizontal Deflection System (Cont.) Table 5–4: Waveform Monitor Horizontal Deflection System (Cont.) Characteristics Performance Requirements Supplemental Information RGB/YRGB Performance Requirements Supplemental Information Staircase Input Amplitude A +10 V input will result in a horizontal display of 9 divisions ±1.4 major divisions. Ground to +10 V. +10 V corresponds to left side of the CRT.
Specifications Table 5–5: Waveform Monitor DG and DP Display Characteristics Performance Requirements Specifications Table 5–5: Waveform Monitor DG and DP Display Supplemental Information Characteristics Differential Gain Performance Requirements Supplemental Information Differential Gain Deflection Factor 5% dG deflects the trace 50 IRE Waveform gain X1, Var. (NTSC) or 500 mV (PAL) ±5%. gain off. Vector gain adjusted to place chroma at compass rose.
Specifications Specifications Table 5–5: Waveform Monitor DG and DP Display (Cont.) Table 5–5: Waveform Monitor DG and DP Display (Cont.) Characteristics Performance Requirements Supplemental Information Recursive Filter Characteristics Performance Requirements Supplemental Information Recursive Filter Noise Reduction ≈15 dB signal-to-noise reduction with filter selected. Assumes white noise source. Noise Reduction ≈15 dB signal-to-noise reduction with filter selected.
Specifications Table 5–6: Synchronization Characteristics Performance Requirements Specifications Table 5–6: Synchronization Supplemental Information Performance Requirements Supplemental Information 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. Int. Sync Separator 0.5 to 2.0 V peak-to-peak composite video. Characteristics Sync Input Sync Input Internal Internal Ref. Sync Separator 0.2 to 2.
Specifications Specifications Table 5–6: Synchronization (Cont.) Table 5–6: Synchronization (Cont.) Characteristics Performance Requirements Supplemental Information AFC Sync Characteristics Performance Requirements AFC Sync Horiz. Freq. Range 15.75 kHz ±200 Hz. Horiz. Freq. Range 15.75 kHz ±200 Hz. Lock-In Time <1 second. Lock-In Time <1 second. Sync Jitter Sync Jitter ≤10 ns; with the addition of 36 dB white noise, ≤12 ns.
Specifications Table 5–6: Synchronization (Cont.) Characteristics Performance Requirements Table 5–6: Synchronization (Cont.) Supplemental Information Characteristics Remote Sync Amplitude Specifications Performance Requirements Supplemental Information 2.0 to 5.0 V square wave, or 4.0 V composite sync. Input enabled through rear-panel REMOTE connector. Remote Sync 2.0 to 5.0 V square wave, or 4.0 V composite sync. Input enabled through rear-panel REMOTE connector.
Specifications Specifications Table 5–7: Vectorscope Vector Display (Cont.) Table 5–7: Vectorscope Vector Display (Cont.) Characteristics Performance Requirements Supplemental Information Display Vector Phase Accuracy Performance Requirements Supplemental Information ±1.25_. Measured with color bar signal. Display ±1.25_. Vector Gain Accuracy Quadrature Phasing Characteristics Measured with color bar signal. Vector Phase Accuracy ±2.5% (1.25 IRE). Vector Gain Accuracy ±0.5_.
Specifications Table 5–7: Vectorscope Vector Display (Cont.) Characteristics Performance Requirements Specifications Table 5–7: Vectorscope Vector Display (Cont.) Supplemental Information Characteristics Vector Display Performance Requirements Supplemental Information Vector Display Differential Phase ≤1_. Differential Phase ≤1_. Differential Gain ≤1%. Differential Gain ≤1%. Measured with 140 IRE (1 V) linearity signal with 40 IRE (300 mV) of subcarrier.
Specifications Specifications Table 5–8: Vectorscope XY Display Table 5–8: Vectorscope XY Display Characteristics Performance Requirements Supplemental Information Input Characteristics Performance Requirements Supplemental Information DC coupled differential inputs through rear-panel connector. Input DC coupled differential inputs through rear-panel connector. Adjustable full scale deflection 0 dBm to +12 dBm for 600 W system. Factory set to 0 dBm. Input Amplitude 2 to 9 V peak-to-peak.
Specifications Table 5–9: Vectorscope SCH Phase Display (Cont.) Characteristics Performance Requirements Input Timing Table 5–9: Vectorscope SCH Phase Display (Cont.) Supplemental Information Characteristics Stable display with any time relationship between signals on CH A, CH B, and EXT. Display Range Performance Requirements Input Timing Supplemental Information Stable display with any time relationship between signals on CH A, CH B, and EXT. Display Range Ext Reference 360_.
Specifications Specifications Table 5–11: Power Requirements Table 5–11: Power Requirements Characteristics Performance Requirements Supplemental Information Mains Voltage Ranges 90 – 132 V. 220 VAC 200 – 250 V. Selected by rear-panel s switch. 48 – 66 Hz. ≥1.3. 120 Watts maximum. 90 – 132 V. 220 VAC 200 – 250 V. Selected by rear-panel s switch. 48 – 66 Hz. ≥1.3.
Specifications Table 5–13: Environmental Summary Characteristics Specifications Table 5–13: Environmental Summary Supplemental Information Characteristics Temperature Supplemental Information Temperature Operating 0_ C to +50_ C. Operating 0_ C to +50_ C. Non-Operating –55_ C to +75_ C. Non-Operating –55_ C to +75_ C. Altitude Operating Altitude To 2 km maximum. Operating Vibration Operating Vibration 0.015 inch (0.38 mm) peak-to-peak 10 –55 Hz, 75 minutes total.
Specifications Specifications Table 5–14: Certifications and compliances Table 5–14: Certifications and compliances EC Declaration of Conformity – EMC 1 Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EC Declaration of Conformity – EMC 1 Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility.
Specifications Table 5–14: Certifications and compliances (Cont.) Table 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. 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 Specifications Table 5–14: Certifications and compliances (Cont.) Table 5–14: Certifications and compliances (Cont.
Options and Accessories Options and Accessories
Options and Accessories Options and Accessories Options Options The Power Cord options are the only currently available options for purchase with the 1780R-Series. Part numbers are listed below. Accessories The Power Cord options are the only currently available options for purchase with the 1780R-Series. Part numbers are listed below. Accessories Standard Accessories Standard Accessories The following accessories are shipped with the 1780R-Series.
Options and Accessories Options and Accessories One of the following cables is shipped with each instrument: 6–2 One of the following cables is shipped with each instrument: Qty Tek Part Number Description Qty Tek Part Number Description 1 161–0216–00 Cable, Power 1 161–0216–00 Cable, Power 1 161–0066–09 Cable, Power (Option A1, 220 V Euro) 1 161–0066–09 Cable, Power (Option A1, 220 V Euro) 1 161–0066–10 Cable, Power (Option A2, 240 V, UK) 1 161–0066–10 Cable, Power (Option A2, 2
Index Index
Index Index A C A C Absolute units (mV / IRE), 3–54 Accessories, 6–1 Adjustments Calibrator amplitude (zero set), 3–45 External horizontal gain (waveform), 3–46 Gain (vector), 3–46, 3–49 Horizontal gain (waveform), 3–45 Horizontal position control calibration, 3–43 Readout intensity (vector), 3–46, 3–51 Readout intensity (waveform), 3–43 Scale illumination, 2–3, 3–6 Trace rotation (waveform), 3–43 Vertical gain (waveform), 3–45 Voltage cursors (zero set), 3–45 Air filter (fan), 6–1 Audio feedback, 2–2
Index Coupling (AC / DC / GND), 3–53 CRT controls, 2–1, 2–3 Cursors Time, 2–5, 3–1 Set interval, 3–45 Voltage, 2–6, 3–2 Units (mV / IRE), 3–54 Zero set, 3–45 CW connector, 2–16 CW reference, 2–12, 3–55 D DC level measurements, 3–24 DC restorer (slow / fast / off), 3–53 Dead zone, 3–43 Differential gain measurement, 3–9, 4–7 Differential phase and gain measurement, 4–12 Differential phase measurement, 3–9, 4–2 Differentiated step filter, 2–14 Disable the beep, 2–2 Disable the password, 3–34 E Enable the p
Index NTSC, 3–6 PAL, 3–7 Waveform NTSC, 3–12 PAL, 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 calibration, 3–43 How to...
Index Low–pass filter, 2–14 Luminance filter, 2–14 M Magnifier, 2–12 Measurement menu Bowtie, 4–33 Chrominance–to–luminance inequalities, 4–23 Diff phase and diff gain, 4–12 Differential gain, 4–7 Differential phase, 4–2 FSC time marks, 4–36 General measurement information, 2–8, 3–56, 4–1 Incidental Carrier Phase Modulation (ICPM), 2–7, 3–5, 4–17 K Factor, 4–20 Noise, 4–16 R–Y sweep, 4–31 Short–Time Distortion, 4–28 Menu access, 2–8, 3–32 Menus Calibrate, 2–8, 3–42 Configure, 2–8, 3–52 Toggling between pa
Index Index R T R T Readout (ON / OFF), 3–55 Readout intensity adjustment (vectorscope), 3–46 Readout intensity adjustment (waveform), 3–43 Rear panel connectors, 2–16 Recall a preset, 3–36 Recall initial settings, 3–37 Recover function, 3–37 Reference switch (INT / EXT / CW), 2–12 Remote connector, 2–18, 3–15 Remote control, 3–15 Rename a preset, 3–40 RS232, 3–18 RS422, 3–18 RY sweep measurement, 4–31 Time cursors, 2–5, 3–1 In line select, 2–6 Set interval, 3–45 Touch screen, 2–2, 3–32 Quadrants, 3–
Index Index X Z X Z X–Y input, 2–16 XY / PIX switch, 2–11 XY graticule scale, 3–9 Zero carrier (ICPM), 4–18 Zero set Calibrator amplitude, 3–45 Phase shift (reference set), 2–7 Voltage cursors, 3–45 X–Y input, 2–16 XY / PIX switch, 2–11 XY graticule scale, 3–9 Zero carrier (ICPM), 4–18 Zero set Calibrator amplitude, 3–45 Phase shift (reference set), 2–7 Voltage cursors, 3–45 Index–6 1780R-Series Operator’s Manual Index–6 1780R-Series Operator’s Manual
