Tektronix 1740A/1750A User Manual
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Tektronix 1740A/1750A User Manual

1740a series; 1750a series waveform / vector monitor
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User Manual

1740A/1750A Series
Waveform/Vector Monitor
070-8470-06
This document supports firmware version 2.2 and
above.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com

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  • Page 1: User Manual

    User Manual 1740A/1750A Series Waveform/Vector Monitor 070-8470-06 This document supports firmware version 2.2 and above. www.tektronix.com Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

  • Page 2: General Safety Summary

    Observe All Terminal Ratings To avoid fire or shock hazard, observe all ratings and mark- ings on the product. Consult the product manual for further ratings information before making connections to the prod- uct. 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 3: Safety Terms And Symbols

    Safety Terms and Symbols Terms in This Manual. These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 4 Symbols on the Product. These symbols may appear on the product: CAUTION WARNING Refer to High Volt- Manual Not suitable for connection to the public tele- communica- tions network 1740A/1750A Series Waveform/Vector Monitor User Manual General Safety Summary Double Protective Insu- Ground (Earth) lated Terminal...

  • Page 5: Table Of Contents

    Operation Basics Functional Overview 1740A/1750A Series Waveform/Vector Monitor User Manual ............. .
  • Page 6 Remote Operation Using Presets through the Remote 1740A/1750A Series Waveform/Vector Monitor User Manual ......
  • Page 7 ........Adjusting Instrument Gain 1740A/1750A Series Waveform/Vector Monitor User Manual ......
  • Page 8 ......... . . viii 1740A/1750A Series Waveform/Vector Monitor User Manual ..... .
  • Page 9 Figure 4-10. Two-Field SC/H R- - Y display (NTSC). Figure 4-11. Two-Field SC/H R- - Y display (NTSC), showing approximate 10° phase error. 1740A/1750A Series Waveform/Vector Monitor User Manual Table of Contents ..
  • Page 10 ....... 1740A/1750A Series Waveform/Vector Monitor User Manual ..
  • Page 11 This user manual is one of a set of two manuals that document the Tektronix 1740A/1750A-Series Waveform/Vector monitors. To purchase a service manual, please refer to “Contacting Tektronix” on Page xiv for address and phone number information. User Manual Instrument controls and readouts appear in...

  • Page 12: Service Manual

    Preface Service Manual Topics covered in the service manual are as follows: Specifications Operating Information Theory of Operation Performance Verification Adjustment Procedures Maintenance Options Electrical Parts List Diagrams Mechanical Parts List 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 13 Preface 1750A Waveform / Vector Monitor. xiii 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 14: Introduction

    Introduction...

  • Page 16: Product Description

    D-2 servo observation. The 1750A- - Series is useful in the composite edit suite, providing all 1740A- - Series features, plus the Tektronix polar SCH display to match color subcarrier-to-horizontal sync timing and color framing among edit sources.

  • Page 17: Description Of Features

    1740/1750- - Series monitors are made through an on-screen menu in the 1740A/ 1750A- - Series. The operator can also recall up to 10 front-panel setups through the 1740A/1750A Series Waveform/Vector Monitor User Manual VOLTAGE/TIMING VARIABLE GAIN LINE SELECT...

  • Page 18: More Information

    Accessories section, which follows this product descrip- tion. Instrument options are listed on page 1-5. A complete listing of instrument specifications begins on Appendix page A-1. 1740A/1750A Series Waveform/Vector Monitor User Manual Product Description FILTER (color subcarrier) rates. menu also...
  • Page 19 Product Description 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 20: Options

    Power Cord Options 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com White phosphor CRT and power cord options are the only options currently available for the 1740A/ 1750A- - Series.

  • Page 21: Crt Options

    CRT installed. If Option 74 is ordered, the instru- ment is shipped with a P4 (white) phosphor CRT installed. The Option 74 CRT part numbers are given in the service manual, at the end of the Replaceable Electrical Parts List. 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 22: Accessories

    CRT filter: smoke gray (378- - 0258- - 00) Optional Accessories Manual, service: 1740A/1750A/1760- - Series (070- - 8469- - XX) Camera, C9 Option 20 Viewing Hood (016- - 0475- - 00) Front-Panel Cover (200- - 3897- - 01) 1740A/1750A Series Waveform/Vector Monitor User Manual Accessories...

  • Page 23: Field Upgrade Kits

    The drawer opens and closes freely, unless latched for transport. Ordering — These items can be ordered with the monitor, or purchased through a Tektronix field office or distributor. When ordering, include both the name and number of the Field Upgrade Kits. Installation —...

  • Page 24: Installation

    Replacement Graticule Light Bulbs (4) Replacement Air Filters for Fan (4) Repackaging for Shipment If it becomes necessary to ship the instrument to a Tektronix Service Center for service or repair, follow these instructions for repackaging: Attach a tag to the instrument showing: the owner,...

  • Page 25: Electrical Installation

    When power is supplied, line voltage will be present in the instrument, even if the is set to 1-10 1740A/1750A Series Waveform/Vector Monitor User Manual NOTE STANDBY POWER switch...

  • Page 26: Mains Frequency And Voltage Range

    No operational modifications are made to these monitors through internal jumper settings. Input coupling, STORER clamp time, configurations are changed through the on-screen menu. Instrument configuration is described on page 3-18. 1740A/1750A Series Waveform/Vector Monitor User Manual WARNING REMOTE connector is a 25-pin, RGB/YRGB staircase, external REMOTE connector.

  • Page 27: Mechanical Installation

    Installation Mechanical Installation All qualification testing was performed with a Tektronix 1700F00 cabinet installed. To guarantee compliance with specifications, the instrument should be operated in a cabinet or rackmount adapter. The Tektronix 1700F00, 1700F02, and 1700F05 provide the proper electrical environment for the instrument, supply adequate shielding, minimize handling damage, and reduce dust collection within the instrument.

  • Page 28: Rackmounting

    20 inches in front of a rack for installation and removal of the instrument. The optional 1700F05 rack adapter allows two Tektronix half-rack instruments to be mounted side-by-side in a rack. It is adjustable so that the instrument can be closely aligned with other equipment in the rack.

  • Page 29: Instrument Configuration

    Focus, scale illumination, signal intensity, readout intensity, and trace rotation are set through the CRT menu. Several instrument operating parameters can be set through CONFIG menu. Instructions for using these menus begin on page 3-18. 1-15 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 30: Getting Started

    Getting Started Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

  • Page 31: Front-Panel Controls

    1-8; serious injury could result. Instrument Reset Certain conditions may cause the 1740A/1750A- - Series instrument front-panel controls to become locked. Reset as follows: 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 32: Figure 2-1. Multi-Use Bezel Controls And Buttons

    If this reset does not unlock the controls, contact your Tektronix field office or call Tektronix at the phone number listed in the front of this manual. Multi-Use Controls...

  • Page 33: Figure 2-2. 1740A Front Panel

    At A Glance Figure 2-2. 1740A Front Panel. 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 34: Figure 2-3. 1750A Front Panel

    At A Glance Figure 2-3. 1750A Front Panel. 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 35 DC REST RESTORE Restorer speed and clamp point are selected through 1740A/1750A Series Waveform/Vector Monitor User Manual allows the signal display to be moved CONFIGURE provides voltage vs. time display of the presents an...
  • Page 36 PARADE side, with any additional inputs overlaid. Selecting PARADE PARADE, inputs. In offers only two choices: one line and one field. 1740A/1750A Series Waveform/Vector Monitor User Manual toggles between external reference PARADE OVERLAY selected, only one A123 / B123 and is cancelled when another...
  • Page 37 1740A/1750A Series Waveform/Vector Monitor User Manual provides an overlaid display of all se- allows choice of flat or filtered display of the...

  • Page 38: Rear-Panel Connectors

    3-25 and page B-1. RS232 provides a serial interface for remote control. The RS232 interface is not supported at the time of this writing. 1740A/1750A Series Waveform/Vector Monitor User Manual A, A1, A2, A3, B, B1, B2 , and INPUT switch settings determine is a 75 Ω...

  • Page 39: Fan Filter

    AC Power for 120 or 240 Vac power mains. The plug is compatible with any of the power cord options available with the 1740A/1750A- - Series. Fan Filter Four replacement air filters for the fan are included with the instrument. Refer to page C-1 for replace- ment and cleaning instructions.

  • Page 40: Figure 2-4. 1740A/ 1750A- - Series Rear Panel

    At A Glance Figure 2-4. 1740A/1750A ---Series Rear Panel. 2-10 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

  • Page 41: Operator's Checkout Procedure

    If performing this procedure reveals improper instrument operation, first check the operation of the associated equip- ment. If the associated equipment is operating normally, refer the 1740A/1750A- - Series to qualified service personnel for repair or adjustment. Required Equipment The following equipment is required to perform this proce- dure: 1.

  • Page 42: Procedure

    INPUT displayed in two-line sweep. 2. Adjust the Display VERT POS Use the display. 2-12 1740A/1750A Series Waveform/Vector Monitor User Manual NTSC NTSC FACTORY menu and select . Press the bezel RECALL . The front-panel controls menu is automatically exited.
  • Page 43 Change the input selections to CH-B, CH-B1, CH-B2, and CH-B3. Repeat the process of moving the generator signal. 4. Check Gain The 1740A/1750A- - Series internal calibrator can be used to CH-A check instrument calibration. Select input and set the generator for NTSC Color Bars output.

  • Page 44: Figure 2-6. Calibrator Display

    Return to the two-line sweep. 2-14 1740A/1750A Series Waveform/Vector Monitor User Manual ), as well as an independent variable gain control. menu and select . Note that menu, then enter it again. Note that the vari- VERT POS control to place the signal on baseline.
  • Page 45 3-4 for a list of sweep rates.) 7. Voltage and Timing Cursors The 1740A/1750A- - Series voltage, timing, and vector cursors can be used to measure any portion of the displayed signal.
  • Page 46 Exit the menu. (For more information about using the cursors, see page 3-8.) 8. Filter Selection The 1740A/1750A- - Series offers several filter selections for the waveform display. Ensure that the instrument is operating in waveform mode. FILTER Enter the preset).

  • Page 47: Figure 2-7. Two-Line Lum Filter Display Of Color Bar Signal

    Figure 2-7. Two-Line LUM filter display of color bar signal. Figure 2-8. Two-Line CHROM filter display of color bar signal. 1740A/1750A Series Waveform/Vector Monitor User Manual Operator’s Checkout Procedure 10 S/DIV FLAT CHROM DIFF R- - Y SCH R- - Y...

  • Page 48: Figure 2-9. Two-Line Diff Filter Display

    FILTER Exit the filter selections are unchanged. Select Figure 2-9. Two-Line DIFF filter display of 5-step staircase signal. 2-18 1740A/1750A Series Waveform/Vector Monitor User Manual FLAT CHROM plus plus display, with the chrominance-filtered . Select the generator 5-step staircase signal. The .

  • Page 49: Figure 2-10. Two-Line R- - Y Display Of Color Bar Signal

    Figure 2-10. Two-Line R ---Y display of color bar signal. Figure 2-11. Two-Field SC/H R ---Y display (NTSC), showing proper SCH phase. 1740A/1750A Series Waveform/Vector Monitor User Manual Operator’s Checkout Procedure FLAT CHROM DIFF R- - Y SCH R- - Y...
  • Page 50 (intensified portion appears wider). The readout is ALL 131- - - - 145 2-20 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com VECTOR PHASE...
  • Page 51 PICTURE Select the selected input signal appears. This can be used to visual- ly identify the signal source. See Figure 2-15. 1740A/1750A Series Waveform/Vector Monitor User Manual Operator’s Checkout Procedure LINE SEL Now only the first field has intensified lines, selection appears.

  • Page 52: Figure 2-14. Vectorscope Color Bar Display

    Operator’s Checkout Procedure VECTOR PHASE Figure 2-14. Vectorscope color bar display. Figure 2-15. Picture mode display of color bar signal. 2-22 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 53: Figure 2-16. Audio Display With Phase Error

    This provides the single-dot display, shown in Figure 2-18. For PAL operation, the selection does not affect the display. A sample PAL display is shown in Figure 2-18. Figure 2-16. Audio display with phase error. 2-23 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 54: Figure 2-17. Ntsc Sc/H Display

    Operator’s Checkout Procedure Figure 2-17. NTSC SC/H display with internal reference selected. Figure 2-18. PAL SC/H display. This concludes the Operator’s Checkout Procedure. 2-24 1740A/1750A Series Waveform/Vector Monitor User Manual VECTOR PHASE VECTOR PHASE...

  • Page 55: Operation Basics

    Operation Basics...

  • Page 56: Functional Overview

    Multiple inputs can be displayed at the same time, or multiple filters can be applied to one input for signal analysis. 1740A/1750A Series Waveform/Vector Monitor User Manual (1750A- - Series only) displays plot of demodulated chromi-...

  • Page 57: Audio

    Picture PICTURE PICTURE source. In marker identifies the selected line in the picture. 1740A/1750A Series Waveform/Vector Monitor User Manual is discussed on page 3-14 and display. Sync jitter over mode allows the operator to verify the signal LINE SELECT mode with...

  • Page 58: Displaying A Signal

    To return to “single input” operation, PARADE / OVERLAY push the longer lighted). 1740A/1750A Series Waveform/Vector Monitor User Manual Functional Overview is pushed, any combination of front-panel TIME CODE PICTURE displays.
  • Page 59 One line magnified = 200 ns/division Two line magnified = 1 µs/division One field or two field magnified = approximately X20 magnification. 1740A/1750A Series Waveform/Vector Monitor User Manual B1, B2, B3 are designed to be used as provides a side-by-side display of the...

  • Page 60: Using The Menus

    (with the menu LED remaining lighted to show this state). To reinstate a menu display, push that menu button again. 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

  • Page 61: Clear Menu

    To exit a menu function while its display is present, push that menu button. (The menu button is functioning as an on-off toggle switch). If the menu display is not present, but the 1740A/1750A Series Waveform/Vector Monitor User Manual CONFIG menus will be exited completely...

  • Page 62: Filter Menu

    SCH variations versus time. F + L — luminance filtered. The display is in parade or overlay mode, as selected through the on-screen menu. When on the left. 1740A/1750A Series Waveform/Vector Monitor User Manual Mode Only) WAVEFORM menu is available for WAVEFORM FILTER mode, an on-screen menu allows the following provides flat (normal) response.

  • Page 63: Cursor Menu

    The right bezel control adjusts the phase of the vector signal. 1740A/1750A Series Waveform/Vector Monitor User Manual displays the video signal flat, lumi- menu button to enter the cursor menu.

  • Page 64: Waveform Cursor Control

    The readout shows the voltage difference (positive or negative) between the two cursor positions, up to four signifi- cant digits. 1740A/1750A Series Waveform/Vector Monitor User Manual AMPL PHASE 75.0IRE 145.0°...

  • Page 65: Figure 3-3. The Waveform Cursor Menu

    Both voltage and timing readouts are present. VERTPOS Figure 3-3. The WAVEFORM CURSOR menu. 3-10 1740A/1750A Series Waveform/Vector Monitor User Manual (MARK) , a control assignment appears on the screen. ∆ V 700 mV WFM CURSOR VOLT1...

  • Page 66: Vector + Waveform (Multiple)

    Using the Cursors With Vector Display Vector cursors are available when a composite vector display is selected. To use vector cursors, operate in TOR+WAVEFORM 1740A/1750A Series Waveform/Vector Monitor User Manual ∆ V 700 mV WFM CURSOR VEC CURSOR CONTROL...
  • Page 67 One use of markers is to position them on the vector target boxes. Adjust the signal source until the color bar signal appears in the marker boxes. 3-12 1740A/1750A Series Waveform/Vector Monitor User Manual POLAR bezel control continues to adjust the POLAR...
  • Page 68 These markers are designed to be used for reference points; there is no amplitude readout. The markers are not affected by 00 IRE set to 1740A/1750A Series Waveform/Vector Monitor User Manual READOUT . Use the bezel controls to (VPOS) and horizontal position...

  • Page 69: Line Select Menu

    Push the bezel button corresponding to ALT 4 FIELD the fourth next field; for example, FIELD5 3-14 1740A/1750A Series Waveform/Vector Monitor User Manual LIN SEL menu button enables the line select mode — 1of 2 (one line or 15 lines) —...
  • Page 70 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com When bezel buttons corresponding to ALT 2 FIELD ALT 4 FIELD , or momentarily around the on-screen label to verify that the selection has been made.

  • Page 71: Preset Menu

    PRESET 8 PRESET 9 FACTORY VERTPOS Left Figure 3-5. PRESET menu display. 3-16 1740A/1750A Series Waveform/Vector Monitor User Manual WAVEFORM internal and menus off. WAVEFORM DISPLAY, CH-A 10 µ SWEEP , REF internal menu button to access the on-screen menu,...
  • Page 72 When the change has been made satisfactorily, select CEPT to store the new name. 1740A/1750A Series Waveform/Vector Monitor User Manual to recall the stored instrument configura- to restore the front-panel setup that was in RECALL was pushed.

  • Page 73: Configure Menu

    +V lines to provide a comparison display. +V shows +V and - - V on alternate lines. TEST service manual. 3-18 1740A/1750A Series Waveform/Vector Monitor User Manual button to display the configure menu, FORMAT STANDARD OFFSET REFERENCE (a box appears around the selec- —...

  • Page 74: Format

    GBR sequence or RGB sequence, as selected through the GBR PARADE GBR/RGB menu. Table 3-1 shows valid format selections. CONFIG—FORMAT played when the front-panel pressed. 1740A/1750A Series Waveform/Vector Monitor User Manual COUPLING DCRESTORER SLOW FAST CLAMP A123...

  • Page 75: Standard

    NTSC , PAL, When changes automatically to match the standard of the displayed input signal. A circled “A” precedes NTSC or PAL on the readout. 3-20 1740A/1750A Series Waveform/Vector Monitor User Manual Valid FORMAT selections. SETUP BARS 75% 100% •...

  • Page 76: Calibrate

    CALIBRATE These choices are offered when CAL SIG on/off. GAIN CAL ment on/off. 1740A/1750A Series Waveform/Vector Monitor User Manual VERTICAL POSITION control normally positions OFFSET ) and 3 ( ) with respect to channel 1 ( control will still position all channels together,...
  • Page 77 In vector mode, the center bezel control adjusts the vector signal gain. Once gain has been adjusted, RESET VCAL VCAL returns the instrument to the factory calibrated gain settings. 3-22 1740A/1750A Series Waveform/Vector Monitor User Manual CAL SIG 100 KHZ FSC OSC or to (3.58 MHz) PAL FSC (3.58 MHz)

  • Page 78: Remote

    1740A/1750A Series Waveform/Vector Monitor User Manual REMOTE connector pin 3 to configures the staircase input for 3-step (Dual Standard Only)

  • Page 79: Gain Menu

    TRACE Exiting the menu will return the instrument to normal opera- tion, with the new settings in effect. 3-24 1740A/1750A Series Waveform/Vector Monitor User Manual . Variable gain is also available, indepen- TIME CODE display is selected. Gain is used for signal and etched graticule adjust-...

  • Page 80: Remote Operation

    (pin 25) is grounded along with one of the pre- set pins, the current front-panel setup is stored at the selected preset location. 3-25 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

  • Page 81: Making Measurements

    Making Measurements...

  • Page 82: Basic Measurements

    Basic Measurements Basic Measurements contains 1740A/1750A- - Series graticule descriptions, followed by specific measurement procedures. This monitor uses an internal graticule, which combines wa- veform and vector markings. The internal graticule scales are on the same plane as the CRT phosphor, eliminating par- allax errors.

  • Page 83: Ntsc Vertical Scales

    The graticules are also marked for K- - Factor tolerances and linear-distortion measurements. These measurements will be described later in this section. Audio K Factor 100% White Level 75% White Level Baseline Setup Sync Tip Figure 4-1. NTSC waveform/vector graticule. 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 84: Pal Vertical Scale

    These measure- ments will be described later in this section. Component signals can be centered on the .35 V line. Audio K Factor 100% White Level Baseline Sync Tip Figure 4-2. PAL waveform/vector graticule. 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 85: Dual-Standard Vertical Scale

    (left side or right side) that is calibrated for the present operating mode. K Factor 75% White Level Setup NTSC Scale Figure 4-3. Dual Standard waveform/vector graticule. 1740A/1750A Series Waveform/Vector Monitor User Manual Audio 100% White Level Baseline Sync Tip PAL Scale...

  • Page 86: Making Waveform Measurements

    VARIABLE GAIN unity. If it is not, adjust the (enabled from the GAIN MENU ) for exactly 100 IRE (700 mV PAL) of signal amplitude from baseline to the middle of the white bar. 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 87 2T pulse over the center of the boxed measurement area and measure its amplitude. When the top of the pulse falls within the dashed lines, the K- - Factor equals 2% or less. 1740A/1750A Series Waveform/Vector Monitor User Manual Factor line-time distortion, measure the VAR GAIN CONFIG—GAIN...

  • Page 88: Vector Graticule

    ±10° centered on the ex- act chrominance phase, and ±20% of chrominance amplitude centered around standard amplitude. The dimen- sions of the smaller boxes represent ±2.5° and ±2.5 IRE. 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 89: Figure 4-4. Vector Targets

    The 1745 and 1755 graticule is a composite of the PAL and NTSC graticules. There are two inner targets within the larger target; the PAL target, and the NTSC target. The NTSC target is inside the PAL target. 1740A/1750A Series Waveform/Vector Monitor User Manual ° ° °...

  • Page 90: Making Vector Measurements

    2° dφ Figure 4-5. Differential Gain and Phase Measurements. 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com Chroma Bandwidth The horizontal and vertical axes of the vector graticule contain markings for checking chroma bandwidth.

  • Page 91: Making Sc/H Phase Measurements

    SC/H-phased with the frames are properly matched. A phase reading of 180° indi- cates that the ly matched. 4-10 1740A/1750A Series Waveform/Vector Monitor User Manual is set to internal, the 1750A has a dual-dot SC/H phased.” is set to...

  • Page 92: Figure 4-6. Ntsc Dual-Dot Sc/H Display

    Relative angle indicates degree of SC/H phase. Figure 4-6. NTSC dual-dot SC/H display. Burst Vector 0° Axis Sync Dot Figure 4-7. NTSC single-dot SC/H display. 1740A/1750A Series Waveform/Vector Monitor User Manual Basic Measurements Sync Dot VECTOR PHASE VECTOR PHASE 4-11...

  • Page 93: Pal

    Figure 4-11. The flat lines indicate that SC/H phase is stable over the entire frame. For PAL, SC/H is a sine wave resulting from the 25 Hz offset (Figure 4-12). 4-12 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 94: Figure 4-10. Two-Field Sc/H R- - Y Display (Ntsc)

    Burst Horizontal Sync Figure 4-9. Two-Line SC/H R ---Y display (NTSC), with proper SC/H phase. Figure 4-10. Two-Field SC/H R ---Y display (NTSC), showing proper SC/H phase. 1740A/1750A Series Waveform/Vector Monitor User Manual Basic Measurements FLAT CHROM DIFF R- - Y...

  • Page 95: Figure 4-11. Two-Field Sc/H R- - Y Display (Ntsc), Showing Approximate 10° Phase Error

    Basic Measurements Figure 4-11. Two-Field SC/H R ---Y display (NTSC), showing approximate 10° phase error. Figure 4-12. Two-Field SC/H R ---Y display (PAL), showing proper SC/H phase. 4-14 1740A/1750A Series Waveform/Vector Monitor User Manual VECTOR PHASE FLAT CHROM DIFF R- - Y...

  • Page 96: Making Audio Measurements

    Gain choices are 0 dBu, 4 dBu, 8 dBu, or 12 dBu. Select gain relative to the system under test. a. Correct Phase c. Phase Error of approximately 30° Figure 4-13. Audio displays. 1740A/1750A Series Waveform/Vector Monitor User Manual Basic Measurements GAIN AUDIO menu when display is b.

  • Page 97: Time Code Display

    LTC is typically recorded on an unused audio track. The 1740A/1750A- - Series monitor provides a voltage- versus-time display of the Time Code waveform, which can be used to check for the following problems: No signal.

  • Page 98: Calibration

    Instrument gain can be adjusted through the BRATE menu. Set Vertical Gain 1. To adjust vertical gain, select mode and push the CALIBRATE 1740A/1750A Series Waveform/Vector Monitor User Manual Calibration CONFIG menu is described on page 3-18. WAVEFORM CONFIG menu button. Select...
  • Page 99 1. To set horizontal gain, push the button. Select Set Vector Gain 1. To adjust vector gain, select and push the BRATE 4-18 1740A/1750A Series Waveform/Vector Monitor User Manual CONFIG CALIBRATE CAL SIG ON , then GAIN CAL ON Select...
  • Page 100 Appendices Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

  • Page 101: Performance Specifications

    The demonstrated MTBF goal is 40637 hours MTBF at 25° C ambient, which will be monitored from field failure reports. Mean Time to Repair (MTTR) The projected MTTR is 1 hour. 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix A (Req) Information that ampli-...

  • Page 102: Electrical Specifications

    Video Input DC Offset Between Channels Video Input Offset Range Video Input Loop-Through Isolation 1740A/1750A Series Waveform/Vector Monitor User Manual DESCRIPTION Req: 1 V full scale (X1): 1 volt input displayed with- in 1% of 140 IRE (1.00 V PAL) X5 Gain: 0.2 volt input displayed within...
  • Page 103 Chrominance Filter Bandwidth Chrominance Filter Attenuation at 2X F Differentiated Step Filter Attenuation at 2X F 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix A: Performance Specification DESCRIPTION Typically ≥60 dB ±2% to 10 MHz (X1 Gain) ±4% to 10 MHz Req: (X5 and X10 Gain), on screen signal (0.2 V or...
  • Page 104 DC Restorer 60 Hz (50 Hz) Attenuation DC Restorer Offset Error Fast Settling Time Blanking Shift with 10 to 90% APL Change 1740A/1750A Series Waveform/Vector Monitor User Manual DESCRIPTION Req: Pulse-to-Bar Ratio 0.99:1 to 1.01:1 Preshoot ≤1% Overshoot ≤1% Ringing ≤1% Field-Rate Tilt ≤1%...
  • Page 105 Input Maximum Operating Input Voltage Absolute Maximum Input Voltage DC Input Impedance Return Loss 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix A: Performance Specification DESCRIPTION Req: ≤ 1 IRE (7 mV PAL) Typically 3 mV DESCRIPTION Composite video or black burst - -1.8 V to +2.2 V, dc + peak ac...
  • Page 106 Sweep Linearity Magnified Sweep Accuracy Magnified Sweep Linearity Horizontal Position Range External Horizontal Input Remote Sync 1740A/1750A Series Waveform/Vector Monitor User Manual DESCRIPTION Req: Synchronization: Sweep triggered by horizon- tal and vertical sync pulses Sweep Length: ≈12 divisions Sweep freeruns without input 5 s/division ±1%...
  • Page 107 Table A- 4: Measurement Cursors CATEGORY Waveform Accuracy Vector Accuracy Table A- 5: RGB/YRGB CATEGORY RGB/YRGB 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix A: Performance Specification DESCRIPTION Req: Voltage: 0.5% Timing: 0.5%, for line rate sweeps Typically 0.5% for field rate sweeps Gain: ±1.5%...
  • Page 108 PAL +V Display Phase Accuracy Error Display Gain Accuracy Error Quadrature Phasing Error Subcarrier Regenerator Pull-in Range 1740A/1750A Series Waveform/Vector Monitor User Manual DESCRIPTION Amplitude: 1.0 V ±0.5% Req: Frequency: 100 kHz ±0.1% Req: Crystal controlled 10 s square wave , ±1%...
  • Page 109 Control +3 dB to - -6 dB. Burst Jitter Clamp Stability Phase Control Range Phase Control Quantization Position Control Range Differential Phase Differential Gain 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix A: Performance Specification DESCRIPTION ≤2 seconds ≤2° (F Req: NTSC: to F ≤2°...
  • Page 110 Longitudinal Time Code. DC coupled, differential input 20 kΩ. 0, 4, 8, & 12 dBm full scale. Menu selectable for 140 IRE (1.0 V) deflection - -10 V to +10 V peak ≥200.0 kHz Req: 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 111 Table A- 11: CRT Display (PAL Values in Parentheses) CATEGORY CRT Viewing Area Accelerating Potential Trace Rotation Range Graticule 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix A: Performance Specification (1750- - Series Only) DESCRIPTION ≤5° Req: Applies over a temperature range of 0 - - 50°...
  • Page 112 Operating Altitude Storage Altitude Vibration Mechanical Shock Transportation Humidity A-12 1740A/1750A Series Waveform/Vector Monitor User Manual DESCRIPTION Req: 90- -250 V Continuous range from 90 to 250 Vac 50 or 60 Hz. 110 VA (67 watts) maximum; 102 VA (60 watts) typical...

  • Page 113: Certifications And Compliances

    IEC 801-3 IEC 801-4 High-quality shielded cables must be used to ensure compliance to the above listed standards. This product complies when installed into any of the following Tektronix instrument enclosures: AS/NZS 3548 FCC Compliance Emissions comply with FCC Code of Federal Regulations 47, Part 15, Subpart B, Class A Limits.
  • Page 114 Pollution Degree 4 Pollution that generates persistent conductivity through conductive dust, rain, or snow. Typical outdoor locations. A-14 1740A/1750A Series Waveform/Vector Monitor User Manual Distribution-level mains (usually permanently connected). Equipment at this level is typically in a fixed industrial location.
  • Page 115 Class 1 (as defined in IEC 1010-1, Annex H) -- grounded product Overvoltage Category Overvoltage Category II (as defined in IEC 1010-1, Annex J) Pollution Degree Pollution Degree 2 (as defined in IEC 1010-1). Note: Rated for indoor use only. 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix A: Performance Specification A-15...

  • Page 116: Remote Connectors

    Input 0 - - +5 V Sawtooth Ground Staircase / Ext. Ground (TTL low) Horizontal En- able 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix B REMOTE Miscellaneous Information ≈9 div of sweep. (Staircase/external horizontal and RGB/YRGB selections are made through the menu.)
  • Page 117 Not used Not used Preset 1 Ground (TTL low) Preset 2 Ground (TTL low) 1740A/1750A Series Waveform/Vector Monitor User Manual Miscellaneous Information Enabled by menu selection. 30/90 Hz for NTSC 25/100 Hz for PAL Grounding this pin enables the function.
  • Page 118 Ground (TTL low) Preset 8 Ground (TTL low) Store Ground (TTL low) 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix B: Remote Connectors Miscellaneous Information Grounding pin 19 recalls setup from preset 3. Grounding pins 19 and 25 stores current setup at preset 3.

  • Page 119: Remote Connector Converter

    Figure B-2. 1740A/1750A-- Series Rear-Panel REMOTE Connector RGB ENABLE REMOTE SYNC IN REMOTE SYNC ENABLE Figure B-2. REMOTE adapter for 1740/1750---Series replacement. 1740A/1750A Series Waveform/Vector Monitor User Manual RGB INPUT GROUND Remote Plug...

  • Page 120: Figure B-3. Rear Panel Rs232 Connector

    RS232 Connector 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com Appendix B: Remote Connectors The serial interface has a driver built in for RS232 serial binary data interchange.

  • Page 121: Appendix C User Service

    This section contains instructions for user and preventive maintenance. If the instrument does not function properly, it should be referred to qualified service personnel or returned to Tektronix for service. Packaging directions for shipment are on page 1-9. Cleaning or Replacing the Fan Filter To ensure adequate air flow, it is essential to clean or replace the rear-panel fan filter regularly.

  • Page 122: Required Equipment

    Graticule Light Replacement Replacement Bulbs Replacement bulbs are supplied with this instru- ment as Standard Accessories. Additional bulbs can be purchased from Tektronix or from local electronics distribution sources. The Tektronix part number and ordering information is given on page 1-7.

  • Page 123: Figure C-1. Graticule Light Replacement

    Replace the five knobs below the CRT and tighten the set screws. Recess Remove this panel (shaded portion) Remove these five knobs Figure C-1. Graticule light replacement. 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix C: User Service Recess...

  • Page 124: Cleaning

    Abrasive cleaners should not be used. Interior Interior cleaning and maintenance should be performed by qualified service personnel only. Instructions for interior maintenance are provided in the service manual. 1740A/1750A Series Waveform/Vector Monitor User Manual CAUTION...

  • Page 125: Replacing The Crt Filter

    Remove the damaged filter and snap the new filter into place on the back side of the bezel. Position the ridged side of the filter towards the CRT to eliminate unwanted visual effects on the CRT face. 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix C: User Service CAUTION...
  • Page 126 Replace the panel below the CRT, and press on both the right and left sides of the panel until it snaps into place. Replace the five knobs below the CRT and tighten the set screws. 1740A/1750A Series Waveform/Vector Monitor User Manual...

  • Page 127: Software Version

    1992 B010458 1750A’s B010100 1.02 Custom 1992 1.03 Custom 1992 1740A/1750A Series Waveform/Vector Monitor User Manual Appendix D Software Version Comments Original software. M7875 Installed in new products, not sent for field upgrade. • Added AUTO unit of measure selection for CURSORS.
  • Page 128 1993 1750/51A B010729 1745/55A B010100 B011760 1993 1993 1740A/1750A Series Waveform/Vector Monitor User Manual Comments M7891 Product enhancement to coincide with the release of dual-standard monitors. Not sent for field upgrade. • Remote sync changed to positive edge trigger. • CONFIG REFERENCE menu now avail.

  • Page 129: Glossary

    Glossary...
  • Page 130 (0.3 volt level, with respect to sync tip, for PAL systems) which exists before and after horizontal sync and during the vertical interval. 1740A/1750A Series Waveform/Vector Monitor User Manual Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...
  • Page 131 3.58 MHz (NTSC) or 4.43 MHz (PAL) subcarrier with R- - Y and B- - Y information. Color Black 1740A/1750A Series Waveform/Vector Monitor User Manual The portion of the video signal which lies Another name for the vertical synchroniz-...
  • Page 132 - frequency carrier. In television it may refer to: (1) An instrument, such as a TEKTRONIX 1450, which takes video in its transmitted form (modulated onto the picture carrier) and converts it to baseband.

  • Page 133: Frequency Modulation (Fm)

    R, G, and B signals are converted to R and B . Values for gamma range from 2.2 to 2.8. 1740A/1750A Series Waveform/Vector Monitor User Manual If a sine wave of a single frequency is put into The pulses which occur before and after the...
  • Page 134 0 IRE point is at blanking level, with sync tip at - - 40 IRE and white extending to +100 IRE. IRE stands for Institute of Radio Engineers, the organization which defined the unit. Linear Distortion Refers to distortions which are inde- pendent of signal amplitude. 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 135 90 degrees (hence the Quadrature notation). The two resultant signals can be added together, and both signals recovered at the other end, if they are also demodulated 90 degrees apart. 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 136 In NTSC systems, video black is typically 7.5 IRE above the blanking level. This 7.5 IRE level is referred to as the black setup level, or simply as setup. 1740A/1750A Series Waveform/Vector Monitor User Manual Distortion resulting from the The property of color which relates to the...
  • Page 137 R- - Y versus B- - Y in NTSC systems (or V versus U in PAL systems). The angle and magnitude of the displayed vectors are respectively related to hue and saturation. 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 138 Abbreviation for luminance. Zero Carrier Reference A pulse in the vertical interval which is produced by the demodulator to provide a reference for evaluating depth of modulation. 1740A/1750A Series Waveform/Vector Monitor User Manual...
  • Page 139 Index...
  • Page 140 1-12 part numbers, 1-8 Calibrator, Specification, A-8 Calibrator signal frequency, 3-22 Camera (optional accessory), 1-7 Carrying case (optional accessory), 1-8 1740A/1750A Series Waveform/Vector Monitor User Manual Index Certifications, A-13 Compliances, A-13 Chroma bandwidth measurements, 3-7, Clamp point, 3-18 Cleaning...
  • Page 141 Front-panel illustration, 2-3 Front-panel controls, 2-1 Front-panel cover (optional accessory), Fuse part number, 1-7 replacing, C-1 Gain adjustment, 4-17 1740A/1750A Series Waveform/Vector Monitor User Manual menu, 3-24 reset, 3-22 X1, X5, X10, 3-24 Graticule illumination, 3-24 vector, 4-7 waveform, 4-1...
  • Page 142 Offsets, enable, 3-21 Operating standard, 1-1, 3-20 Operating voltage, 1-11 Optional accessories, 1-7 Options, 1-5 Ordering accessories, 1-8 1740A/1750A Series Waveform/Vector Monitor User Manual Overlay mode, 2-7, 3-4 Packaging for shipment, 1-9 Parade mode, 2-6, 3-4 Performance specification, A-3 Physical Characteristics, Specification,...
  • Page 143 Vertical position control, 2-5 Viewing hood (optional accessory), 1-7 Voltage cursors, 3-9 Waveform cursors, 3-9 Waveform display, 2-5, 3-1 Waveform graticule, 4-1 Waveform Horizontal Deflection, Specifica- tion, A-6 Waveform markers, 3-9 Waveform Vertical Deflection, Specifica- tion, A-3 1740A/1750A Series Waveform/Vector Monitor User Manual...

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