Tektronix DS1001G User Manual
Tektronix DS1001G User Manual

Tektronix DS1001G User Manual

Television demodulators
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  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 User Manual DS1001A/DS1001G Television Demodulators 071-0905-01 www.tektronix.com...
  • Page 3 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, Inc., P.O. Box 500, Beaverton, OR 97077...
  • Page 4 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
  • Page 6: Table Of Contents

    ......2- -4 Differences Between DS1001A and DS1001G ... . .
  • Page 7 Programming Model ....... . . B- -2 DS1001A/DS1001G User Manual...
  • Page 8 ......D- -1 Appendix E: Factory Default Settings ....E- -1 Glossary Index DS1001A/DS1001G User Manual...
  • Page 9 Figure 1- -2: Typical system configuration ....1- -6 Figure 2- -1: DS1001A/DS1001G front panel ... . . 2- -1 Figure 2- -2: DS1001A Rear-panel connectors .
  • Page 10 ....E- -1 Table E- -2: System default settings ..... E- -2 DS1001A/DS1001G User Manual...
  • Page 11 Table of Contents DS1001A/DS1001G User Manual...
  • Page 12: General Safety Summary

    Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. Provide Proper Ventilation. Refer to the manual’s installation instruc- tions for details on installing the product so it has proper ventilation. DS1001A/DS1001G User Manual...
  • Page 13 WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product. These symbols may appear on the product: WARNING Protective Ground CAUTION High Voltage (Earth) Terminal Refer to Manual DS1001A/DS1001G User Manual viii...
  • Page 14: Preface

    Preface This is the user manual for the DS1001A/DS1001G Television Demodulator. The DS1001A/DS1001G model offers the following features: H Simultaneous SAP and stereo audio outputs H Dual composite video outputs H Audio IF output H IF input and output H M/N Standard...
  • Page 15: Contacting Tektronix

    This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices. DS1001A/DS1001G User Manual...
  • Page 16: Getting Started

    Getting Started...
  • Page 18: Product Description

    H Functional Check Product Description The television demodulator can demodulate M/N standard television signals to baseband video and audio. In addition, the DS1001G provides the capability of recognizing a GCR signal and applying correction to the baseband video output. The DS1001A/DS1001G covers the tuning range of 55.25 to 801.25 MHz.
  • Page 19: Physical Dimensions

    Accessories Standard Accessories Your television demodulator includes the standard accessories listed below: H DS1001A/DS1001G - - Standard North American Power Cord (161-0066-00) H Two, 250 V, 1.6 Amp (1.6AT) replacement fuses (159-0366-00) H Audio output connectors (020-2381-00) H User Manual (071-0905-01), this manual...
  • Page 20: Table 1- -1: Power Cords

    Getting Started The following power cords can be ordered from Tektronix: Table 1- - 1: Power Cords Plug configuration Normal usage Part number North America Standard 115 V 161-0066-00 Europe 161-0066-09 230 V United Kingdom 161-0066-10 230 V North America...
  • Page 21: Electrical Installation

    Summary at the front of this manual. NOTE. Save the shipping carton and packing materials in case it becomes necessary to ship the television demodulator to a Tektronix Service Center for service or repair. Packaging instructions are on page C- -1.
  • Page 22: Figure 1- -1: Rear-Panel Connectors

    The television demodulator tests major circuits during power on and displays the following status messages: ROM test RAM test C test System Initialization When testing completes, the television demodulator displays the current RF setting. DS1001A/DS1001G User Manual 1- - 5...
  • Page 23: Mechanical Installation

    To guarantee compliance with specifica- tions, operate the instrument only in the original cabinet. Video monitor Audio R+L outputs Video output Audio monitor RF/Antenna input Figure 1- - 2: Typical system configuration DS1001A/DS1001G User Manual 1- - 6...
  • Page 24: Custom Installation

    It requires approximately 3 inches (7.6 cm) of rear panel clearance for the power cord and cable connections and 20 inches (50.8 cm) in front of the rack for installation and removal. See Optional Accessories on page 1- -2 for available rackmount kits. DS1001A/DS1001G User Manual 1- - 7...
  • Page 25: Functional Check

    A continued failure may indicate the need for repair. Contact your service person or a Tektronix, Inc. field office for assistance. DS1001A/DS1001G User Manual 1- - 8...
  • Page 26: Operating Basics

    Operating Basics...
  • Page 28: Functional Overview

    Operating Basics The DS1001A/DS1001G Television Demodulator is typically used as part of a system that includes video and audio measurement equipment, such as the Tektronix VM100 Series Automated Measurement Set. Typical equipment connections are described in the Functional Check procedure, located in section 1.
  • Page 29 When the status display is active, the left and right arrow buttons can be used to temporarily change the current frequency. H ENTER button (↵). Use the enter button to enter the required configuration mode and to accept configuration changes. DS1001A/DS1001G User Manual 2- - 2...
  • Page 30: Rear-Panel Connectors

    H VIDEO OUT. Provides two video output connectors with a standard 1 volt output with nominal 75 Ω impedance. H AUDIO IF OUT. Provides a buffered 4.5 MHz audio subcarrier output with nominal 75 Ω impedance. DS1001A/DS1001G User Manual 2- - 3...
  • Page 31: Audio Output Connector

    Two types of mating connectors can be used with the audio output connectors, a shielded 3-way plug, or a cable housing. + 0 -- Figure 2- - 3: Audio output connector DS1001A/DS1001G User Manual 2- - 4...
  • Page 32: Differences Between Ds1001A And Ds1001G

    Operating Basics Differences Between DS1001A and DS1001G The main difference between the DS1001A and DS1001G television demodulators is a GCR (Ghost Canceller Reference) module replacing the DS1001A video output card. GC Video O/P Standard Video O/P Figure 2- - 4: DS1001G Rear-panel connectors The GCR module has three separate outputs located on the rear- -panel, shown in Figure 2- -4.
  • Page 33 +25 µs after the main signal and two 36- -tap “floating” filter blocks that remove rare ghosts occurring from +25 µs to +41.6 µs after the main signal. The DS1001G cancels ghosts with signal strength of - -6 dB relative to the main video signal, leaving a ghost residue of less than - -35 dB relative to the main signal.
  • Page 34: Operating Procedures

    1 second to perform if the internal nonvolatile memory is valid. If the memory has been corrupted or damaged, then the television demodulator will attempt to load factory default settings. This process takes 5 to 10 seconds. When the initialization sequence DS1001A/DS1001G User Manual 2- - 7...
  • Page 35: Selecting Display Modes

    If RF is the selected input source, the display shows the input signal level, the channel number and associated frequency. If IF is the selected input source, the display shows the IF frequency. DS1001A/DS1001G User Manual 2- - 8...
  • Page 36: Audio1 Output Status

    When you display the Audio 1 O/P Status, you can temporarily select audio modes using the right and left arrow buttons (← →) on the front panel. If all audio modes are available from the received signal, DS1001A/DS1001G User Manual 2- - 9...
  • Page 37: Audio 2 Output Status

    (← →) on the front panel. If both audio modes are available from the received signal, the status display shows each mode. If SAP is not available on the received signal, the status display shows the following: Mono, Mute DS1001A/DS1001G User Manual 2- - 10...
  • Page 38: Gcr Module Status

    GCR signal is not detected on line 19 of video signal. GCR coefficients not frozen. GCR module bypass set off. GCR signal is detected on line 19 of video signal. GCR coefficients not frozen, ghost cancellation algorithm active. DS1001A/DS1001G User Manual 2- - 11...
  • Page 39: Program Set

    In the GCR module status display mode, the GCR module coefficients can be manually unfrozen by pressing the enter button ( ). This allows the DS1001G to reapply the ghost cancellation algorithm to the current input video signal. After 5 s the coefficient freeze is automatically activated.
  • Page 40: Firmware Revision

    1. Press the DISPLAY until the front panel lock status shows. The following message displays: 2. Press the arrow buttons in the following sequence: The following message displays: When the front panel is unlocked, the television demodulator settings can be adjusted. DS1001A/DS1001G User Manual 2- - 13...
  • Page 41: Temperature Status

    Use the up and down arrow buttons (↑ and ↓) to select from the 20 stored programs. As each program number appears, its program configuration becomes active. When you reach the required program number, pressing the DS1001A/DS1001G User Manual 2- - 14...
  • Page 42: Adjusting The Current Program

    The changes you make are temporary and will be lost when you select another display mode or remove the AC power. DS1001A/DS1001G User Manual 2- - 15...
  • Page 43 Operating Basics DS1001A/DS1001G User Manual 2- - 16...
  • Page 44: Reference

    Reference...
  • Page 46: Configuring Operation

    Frequency Table UHF, VHF, user defined Channel Various Frequency NTSC: 55.25 to 801.25 MHz ZCP Status On, Off ZCP Line Number NTSC: 10-20 (F1 & F2) ZCP Position 0 to 4 Signal Source RF, IF DS1001A/DS1001G User Manual 3- - 1...
  • Page 47: Quick Guide

    1. Press the front panel CONFIG button to access the Configuration menu. 2. Use the up and down arrow buttons (↑ and ↓) to select a configuration mode. 3. Press the enter button (↵) to enter the selected configuration mode. DS1001A/DS1001G User Manual 3- - 2...
  • Page 48: Program Configuration

    Configuration menu. The top level selection is Program. Press the enter button (↵) to enter the Program Config menu. Use the up and down arrow buttons (↑ and ↓) to choose and change any of the following selections: DS1001A/DS1001G User Manual 3- - 3...
  • Page 49: Config Program: Frequency Tables

    Use the channel item (CH) to select a channel from the chosen frequency table. The channel frequency appears in brackets after the channel number. This channel selection and the following frequency selection interact. Changing either one will change the other. DS1001A/DS1001G User Manual 3- - 4...
  • Page 50: Config Program: Frequencies

    The zero carrier pulse (ZCP) is a special feature of the television demodulator. You configure the ZCP feature using the ZCP status, ZCP line, and ZCP position items. The ZCP status item determines whether the ZCP signal is on or off. DS1001A/DS1001G User Manual 3- - 5...
  • Page 51: Config Program: Signal Source

    The Signal Source selection sets the input source to either RF or IF input. If the IF input source is selected, then the channel number and frequency settings become redundant and will not show on the system status display. DS1001A/DS1001G User Manual 3- - 6...
  • Page 52: Config Program: Audio 1 Input Selection

    The AFC function is not normally required for broadcast signals and should be used with caution because of its limited range of ±1 MHz about the video carrier frequency. The options for the AFC item are either on or off. DS1001A/DS1001G User Manual 3- - 7...
  • Page 53: Config Program: Sound Trap

    The BTSC Stereo and SAP noise threshold items are only present on NTSC systems and are used to switch stereo and SAP outputs off when the thresholds are reached. The range for both items is 1 - - 16. DS1001A/DS1001G User Manual 3- - 8...
  • Page 54: Gcr Module Configuration

    Config GCR Module: CFH Interval Sets the GCR module automatic coefficients unfreeze interval. The CFH interval setting allows the DS1001G to periodically reapply the ghost cancellation algorithm to the current input video signal. After 5 s the coefficient freeze is automatically activated. The automatic unfreeze can be disabled by setting a value of 0, otherwise the interval can be set from 1 to 24 hours in hourly increments.
  • Page 55: Config Gcr Module: Gcr Bypass

    Setting the GCR module bypass to off causes the output on the GC video port to pass through the ghost correction circuit. The video signal on STANDARD VIDEO O/P is not affected by the GCR module bypass setting. DS1001A/DS1001G User Manual 3- - 10...
  • Page 56: Serial Configuration

    The RS485 communications protocol allows connection of multiple units to one host. Each device connected to the host must have a unique address. The range for the unit address is 32 - - 63. DS1001A/DS1001G User Manual 3- - 11...
  • Page 57: Config Serial: Rs232 Rts/Cts Status

    Enables or disables termination at the television demodulator in the RS485 serial mode. Enable termination when the television demodulator is the last device in a multi-drop system. Select unterminated when it is not the last device. UNTERMINATED TERMINATED DS1001A/DS1001G User Manual 3- - 12...
  • Page 58: Frequency Response Configuration

    Due to memory limitations within the television demodulator, it is impractical to store frequency response adjustments for every possible frequency, so the adjustments are possible only for the range of frequencies listed in Table 3- -2. DS1001A/DS1001G User Manual 3- - 13...
  • Page 59: Table 3- -2: Frequency Response Adjustment Bands

    350.00 -- 359.75 MHz 810.00 -- 829.75 MHz 360.00 -- 369.75 MHz 830.00 -- 849.75 MHz 370.00 -- 379.75 MHz 850.00 -- 860.25 MHz 380.00 -- 389.75 MHz 390.00 -- 399.75 MHz 400.00 -- 409.75 MHz DS1001A/DS1001G User Manual 3- - 14...
  • Page 60: Contrast Adjustment

    Adjustment menu. Use the left and right buttons (← and →) to set the contrast lower or higher as appropriate for the ambient light level. Press the enter button (↵) when you have finished. DS1001A/DS1001G User Manual 3- - 15...
  • Page 61: User Defined Channel Table

    Config button or select another channel. You select the User Defined channel table as you do other frequency and channel tables. Refer to Program Configuration on page 3- -3 for instructions on selecting a frequency table. DS1001A/DS1001G User Manual 3- - 16...
  • Page 62: Appendices

    Appendices...
  • Page 64: Appendix A: Performance Specifications

    55.25 -- 801.25 MHz M/N IF Frequency 45.75 MHz M/N Sensitivity -20 dBmV to +20 dBmV (Recommended 0 -- 30 dBmV) Return Loss > 6 dB, worst case over frequency range 75 Ω, F type connector Input Impedance DS1001A/DS1001G User Manual A- - 1...
  • Page 65: Table A- -2: Audio Specifications

    ±50 kHz Frequency Stability Signal to Noise > 50 dB weighted Two Video Outputs 1 Vpp on BNC connectors (On DS1001G only -- GCR processing on single BNC as indicated) One Quadrature Output On BNC connector Differential Gain < 1.5% (< 2.5% DS1001G typical) ±1.5˚...
  • Page 66: Table A- -3: Electrical Specifications - - Power Requirements

    6500 feet maximum (2.0 km) Table A- - 5: Physical characteristics Category Description Dimensions Height: 1.8 inches (46 mm) Width: 8.1 inches (206 mm) Depth: 17.3 inches (440 mm) Weight Net Weight: 4.8 pounds (2.2 kg) DS1001A/DS1001G User Manual A- - 3...
  • Page 67: Table A- -6: Certifications And Compliances

    Low Voltage Directive 73/23/EEC, Amended by 93/68/EEC EN 61010-1/A2:1995 Safety requirements for electrical equipment for measurement, control, and laboratory use Installation Category Terminals on this product may have different installation category Descriptions designations. The installation categories are: DS1001A/DS1001G User Manual A- - 4...
  • Page 68: Table A- -7: Safety Certification And Compliance

    Class I (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. DS1001A/DS1001G User Manual A- - 5...
  • Page 69: Table A- -8: Safety Standards

    Equipment for Measurement, Control, and Laboratory Use. Additional Compliance IEC1010-1/A2 - Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use. ISA S82.02.01--1999 -- Safety Standard for Electrical and Electronic Test, Measuring, Controlling, and Related Equipment DS1001A/DS1001G User Manual A- - 6...
  • Page 70: Appendix B: Remote Control

    Speed: 9600 bps Protocol: 1 start bit, 8 data bits, no parity, 1 stop bit Interface: RS485 or RS232 (match the television demodulator setting) Handshaking: RS232 only, use RTS/CTS hardware handshaking (match the television demodulator setting) DS1001A/DS1001G User Manual B- - 1...
  • Page 71: Programming Model

    0 to 255. Table B- -2 lists special byte codes used to coordinate data transfers between the PC and the television demodulator. For information on how to use these special byte codes, refer to Sending and Receiving Data on page B- -5. DS1001A/DS1001G User Manual B- - 2...
  • Page 72: Addresses

    You set this unique address as a decimal number. To set the address, use the SERIAL SET- -UP item in the configuration menu. The remote address is the base address used to determine the Ars and Arr addresses. DS1001A/DS1001G User Manual B- - 3...
  • Page 73: Remote Operation Flag

    “PRESET?”. Query commands tell the television demodulator to prepare to send a particular type of data to the PC. Commands may be followed by one or more parameters specific to the command. Parameters are in binary format. Query commands often do DS1001A/DS1001G User Manual B- - 4...
  • Page 74: Sending And Receiving Data

    PC > [DLE] [ENQ] [Ad] [Ars] Addressing phase DS1000 > [DLE] [WACK] Not ready response The PC addresses a television demodulator that is ready, and the PC sends data: PC > [DLE] [ENQ] [Ad] [Ars] Addressing phase DS1001A/DS1001G User Manual B- - 5...
  • Page 75: Send Data Phase

    The PC addresses a television demodulator that is not ready, ignores the not ready response, and sends data: PC > [DLE] [ENQ] [Ad] [Ars] Addressing phase DS1000 > [DLE] Aborted ready response PC > [DLE] [STX] [Data] [DLE] [ETX]Data phase DS1001A/DS1001G User Manual B- - 6...
  • Page 76: Receive Address Phase

    To avoid data contention, the PC uses polling to check for messages. Polling is done with the PATH? command. PATH? returns an empty string if the television demodulator has no message, and returns the DS1001A/DS1001G User Manual B- - 7...
  • Page 77 Data phase The PC continuously polls the television demodulator. PC > [DLE] [ENQ] [Ad] [Ars]Send Addressing phase DS1000 > [DLE] [ACKO] [Ad] [Ars] Ready phase PC > [DLE] [STX] [’PATH?’] [DLE] [ETX] Data phase DS1001A/DS1001G User Manual B- - 8...
  • Page 78: Getting A Message

    The PC resumes polling, but clears the message data as it reads the message. PC > [DLE] [ENQ] [Ad] [Ars]Send addressing phase DS1000 > [DLE] [ACKO] [Ad] [Ars] Ready phase DS1001A/DS1001G User Manual B- - 9...
  • Page 79 Appendix B: Remote Control PC > [DLE] [STX] [’MSG=’] [20h] [DLE] [ETX] Data phase DS1001A/DS1001G User Manual B- - 10...
  • Page 80: Command Syntax

    10 characters, such as ‘ABCDEFGHIJ’. Boolean 0 or 1, representing an off or on state. bitmap A string of bits with a definite length, where each bit represents the state of a parameter. DS1001A/DS1001G User Manual B- - 11...
  • Page 81: Data Offset

    The offset is the relative position of a data item in the transmitted or received data. The first bit in a data transfer is number 1, so the first byte has an offset of 1. DS1001A/DS1001G User Manual B- - 12...
  • Page 82: Remote Command Descriptions

    Syntax AFC= AFC? Arguments <afc_state> Either 0 for off or 1 for on. Examples Command Result ‘AFC=‘ 1 AFC control is set to on. DS1001A/DS1001G User Manual B- - 13...
  • Page 83 Reserved Reserved Stereo (L) Stereo (R) Mono Mono Mono Mono Mute Examples Command Result ‘AUD_OUT=‘ Audio output mode set to stereo ‘7‘ ‘AUD_OUT=? Left Audio Out is MONO ‘ Right Audio Out is SAP DS1001A/DS1001G User Manual B- - 14...
  • Page 84 Left Audio Out and Right Audio Out will be MONO. If the transmis- sion changes to STEREO, Left Audio Out and Right Audio Out will remain in MONO. NOTE. This command is valid for all models of the television demodulator (DS1001, DS1001A, and DS1001G). DS1001A/DS1001G User Manual B- - 15...
  • Page 85 The ’AUD_PREF=’ command sets the television demodulator audio mode for the secondary BTSC decoder (SAP Out). The audio mode options for the secondary BTSC decoder are MONO and SAP. Setting a particular audio mode does not necessarily mean that the audio DS1001A/DS1001G User Manual B- - 16...
  • Page 86 SAP Out is MUTE. If the transmission changes to SAP, SAP Out changes to SAP. NOTE. This command is valid only for the DS1001A and DS1001G television demodulators. Although this command is not valid for the DS1001, it will not have any adverse affect on its operation.
  • Page 87 Sets the SAP noise threshold in the BTSC controller. Range is 0 to 15 Examples Command Result ‘BTSC=‘ 10 BTSC stereo noise threshold set to level 10. BTSC SAP noise threshold set to level 7. DS1001A/DS1001G User Manual B- - 18...
  • Page 88 Refer to Appendix D for the record number associated with each channel number in the selected table. Examples Command Result ‘CHANNEL=‘1 Table 1, CATV HRC frequency table. is selected. Channel record 18 selected = channel number 19 DS1001A/DS1001G User Manual B- - 19...
  • Page 89 Puts the television demodulator in the local state, which enables the front panel controls and clears the remote flag. Use the command PWD to enter the remote state and set the remote flag. Syntax DISC= Arguments none DS1001A/DS1001G User Manual B- - 20...
  • Page 90 YYY = frequency in kHz -- (x * 256). The range is 0 to 999. Examples Command Result ‘FREQ=’[1 100 0 freqH: [1 100] = 1x256+100 = 356 MHz 250] freqL: [0 250] = 250 kHz The frequency set is 356.25 MHz. DS1001A/DS1001G User Manual B- - 21...
  • Page 91 Syntax GC_CFH= GC_CFH? <gc_cfh_state> Arguments <gc_cfh_state> is either 0 for on (coefficients unfrozen) or 1 for on (coefficients frozen). Examples Command Result ‘GC_CFH=’ GC module coefficients are unfrozen. ‘GC_CFH?’ GC module coefficients are frozen. DS1001A/DS1001G User Manual B- - 22...
  • Page 92 <bypass_state> is either 0 for or 1 for RF input. Examples Command Result ‘GC_BYP=’ 1 GCR module bypass is set to on i.e. GC VIDEO O/P set to match STANDARD VIDEO O/P. ’GC_BYP?’ GCR module bypass control state is off. DS1001A/DS1001G User Manual B- - 23...
  • Page 93 The ghost cancellation detection state indicates if the GCR signal on line 19 of the video is present. Syntax GC_DET? <gcr_detect> Arguments <gc_detect> is either 0 for GCR signal not detected or 1 for GCR signal detected. Examples Command Result ’GC_DET?’ GCR signal detected. DS1001A/DS1001G User Manual B- - 24...
  • Page 94 GC_INT Sets or requests the GC module interval for automatically unfreezing the coefficients. This allows the DS1001G to periodically reapply the ghost cancellation algorithm to the current input video signal. After 5 s the coefficients hold is automatically activated. The automatic unfreeze can be disabled by setting a value of 0, otherwise the interval can be set from 1 to 24 hours in hourly increments.
  • Page 95 Char(10) Model (‘DS1001A’) <version> Char(6) Software version (‘V01.00’) <unit_loc> Char(20) Custom name (‘DEMOD2’) Examples Command Result ‘IDN?’ ‘DS001A V01.00’‘DEMOD2’ The model is DS1001A, the software is version 1.00 and the custom name is DEMOD2. DS1001A/DS1001G User Manual B- - 26...
  • Page 96 PWD to start remote operation and DISC to return to local operation. Syntax LOG? Arguments <remote flag> 0 for local control, 1 for remote Returns <remote flag> Examples ‘LOG?’ The television demodulator is in the local state. DS1001A/DS1001G User Manual B- - 27...
  • Page 97 Television demodulator received an invalid command b6: Wrong remote parameter Television demodulator received the wrong parameter b0 -- b5: Not used Examples ‘MSG?’ 128 decimal which equals 80h or 10000000b. This message indicates an invalid command. DS1001A/DS1001G User Manual B- - 28...
  • Page 98 Syntax MSG_C= <msg_state> MSG_C? Arguments <msg_state> one byte, either 1 to enable messages or 0 to disable them. Examples Command Result ‘MSG_C=‘ 1 The television demodulator may now generate messages. DS1001A/DS1001G User Manual B- - 29...
  • Page 99 <Ars> Remote address, calculated on page B--3. Examples Command Result ’PATH?’ <Ad><Ars> The television demodulator has a message and is ready to send it. The <Ad><Ars> addresses are contained in the <data> returned. DS1001A/DS1001G User Manual B- - 30...
  • Page 100 <press_nr> is the program number to set or query. Range 1- -20. <settings_data> Refer to the SETT command for a definition of these parameters. Examples Command Result ‘PRESET?’ <settings_data> Returns the program data for number 10. DS1001A/DS1001G User Manual B- - 31...
  • Page 101 Puts the television demodulator in the remote state and sets the remote flag. The front panel is disabled when in the remote state. Use the command DISC to enter the local state and clear the remote flag. Syntax PWD= Arguments none DS1001A/DS1001G User Manual B- - 32...
  • Page 102 TUNING = 4, indicating the PROGRAM mode. Syntax RECPRT= <prog_nr> RECPRT? Arguments <prog_nr> one byte in the range 1 to 20 to indicate the program number. Examples Command Result ‘RECPRT?’ The program number 12 is the current active program. DS1001A/DS1001G User Manual B- - 33...
  • Page 103 Syntax REPORT? <tic_state> Arguments <tic_state> one byte, either 0 to indicate an active signal, or 2 to indicate no input signal. Examples Command Result ‘REPORT?’ The television demodulator does not detect a signal. DS1001A/DS1001G User Manual B- - 34...
  • Page 104 Audio 1 mode select bit 1 b4: Audio 1 mode select bit 0 b3: Audio 2 mode select b2: Sound trap control b1: AFC control b0: Off--channel frequency Source select, bit 7: Mode IF Input RF Input DS1001A/DS1001G User Manual B- - 35...
  • Page 105 0 to 21 number ZCP position 0 to 4 BTSC stereo 0 to 15 BTSC noise BTSC SAP 0 to 15 BTSC noise Examples Command Result ‘SETT?’ Returns the current settings of the television demodulator. DS1001A/DS1001G User Manual B- - 36...
  • Page 106 <sig_level> one byte in the range 0 - - 10 to indicate the nominal received signal strength, where: No signal received Weak signal 10 = Strong signal Examples Command Result ’SIGLEV?’ The television demodulator is receiving a strong signal. DS1001A/DS1001G User Manual B- - 37...
  • Page 107 Syntax SOURCE=<ip_srce> SOURCE? Arguments <ip_srce> is either 0 or IF input or 1 for RF input. Examples Command Result ‘SOURCE=’1 Input source is set to RF. DS1001A/DS1001G User Manual B- - 38...
  • Page 108 Syntax STRAP= <strap_state> STRAP? Arguments <strap_state> Either 1 for On or 0 for Off. Examples Command Result ‘STRAP=‘ 1 Sound trap is on. DS1001A/DS1001G User Manual B- - 39...
  • Page 109 H 3, Frequency tuning, allows tuning by frequency in network standard increments. H 4, Programmed tuning, allows tuning by loading a stored preset. Examples Command Result ‘TUNING?’ 4: Returned data of [4] means television demodulator is in program (preset) mode. DS1001A/DS1001G User Manual B- - 40...
  • Page 110 11--21: 10--20 (Field 2) <zcp_position> ZCP position on the selected line. Range is 0 to 4. Examples Command Result ‘ZCP=‘ 1 ZCP is active on line 12 (field 2) in position 1. 13 1 DS1001A/DS1001G User Manual B- - 41...
  • Page 111 Appendix B: Remote Control DS1001A/DS1001G User Manual B- - 42...
  • Page 112: Appendix C: Service

    The only serviceable part is the fuse, which is available on the rear panel. There are no user serviceable parts within the unit. Please return it to a Tektronix Service Center for service and calibration. Packaging for Shipment If it becomes necessary to ship the television demodulator to a Tektronix Service Center, follow these instructions: 1.
  • Page 113: Replacing The Fuse

    Clean the dust from the outside of the instrument with a soft, dry cloth or small brush. A brush is especially useful for removing dust from around the buttons and connectors. DS1001A/DS1001G User Manual C- - 2...
  • Page 114 CATV IRC channel table NTSC D--3 D--3 CATV standard channel table NTSC D--5 D--4 Standard channel table NTSC D--7 D--5 IRC channel table NTSC D--9 D--6 HRC channel table NTSC D--10 D--7 Broadcast channel table NTSC D--12 DS1001A/DS1001G User Manual D- - 1...
  • Page 115: Appendix D: Channel Tables

    462.00 126.00 318.00 468.00 132.00 324.00 474.00 138.00 330.00 480.00 144.00 336.00 486.00 150.00 342.00 492.00 156.00 348.00 498.00 162.00 354.00 504.00 168.00 360.00 510.00 216.00 366.00 516.00 222.00 372.00 522.00 228.00 378.00 528.00 DS1001A/DS1001G User Manual D- - 2...
  • Page 116: Table D- -2: Catv Irc Channel Table

    235.25 61.25 127.25 241.25 67.25 133.25 247.25 79.25 139.25 253.25 85.25 145.25 259.25 175.25 151.25 265.25 181.25 157.25 271.25 187.25 163.25 277.25 193.25 169.25 283.25 199.25 217.25 289.25 205.25 223.25 295.25 211.25 229.25 301.25 DS1001A/DS1001G User Manual D- - 3...
  • Page 117 487.25 613.25 367.25 493.25 619.25 373.25 499.25 625.25 379.25 505.25 631.25 385.25 511.25 637.25 391.25 517.25 643.25 397.25 523.25 91.25 403.25 529.25 97.25 409.25 535.25 103.25 415.25 541.25 109.25 421.25 547.25 115.25 427.25 553.25 DS1001A/DS1001G User Manual D- - 4...
  • Page 118: Table D- -3: Catv Standard Channel Table

    469.25 133.25 325.25 475.25 139.25 331.25 481.25 145.25 337.25 487.25 151.25 343.25 493.25 157.25 349.25 499.25 163.25 355.25 505.25 169.25 361.25 511.25 217.25 367.25 517.25 223.25 373.25 523.25 229.25 379.25 529.25 235.25 385.25 535.25 DS1001A/DS1001G User Manual D- - 5...
  • Page 119 571.25 115.25 745.25 577.25 649.25 751.25 583.25 655.25 757.25 589.25 661.25 763.25 595.25 667.25 769.25 601.25 673.25 775.25 607.25 679.25 781.25 613.25 685.25 787.25 619.25 691.25 793.25 625.25 697.25 799.25 631.25 703.25 637.25 709.25 DS1001A/DS1001G User Manual D- - 6...
  • Page 120: Table D- -4: Standard Channel Table

    439.25 145.25 295.26 445.25 151.25 301.26 451.25 157.25 307.26 457.25 163.25 313.26 463.25 169.25 319.26 469.25 175.25 325.26 475.25 181.25 331.27 481.25 187.25 337.26 487.25 193.25 343.26 493.25 199.25 349.26 499.25 205.25 355.26 505.25 DS1001A/DS1001G User Manual D- - 7...
  • Page 121 541.25 643.25 745.25 547.25 649.25 751.25 553.25 655.25 757.25 559.25 661.25 763.25 565.25 667.25 769.25 571.25 673.25 755.25 577.25 679.25 781.25 583.25 685.25 787.25 589.25 691.25 793.25 595.25 697.25 799.25 601.25 703.25 607.25 709.25 DS1001A/DS1001G User Manual D- - 8...
  • Page 122: Table D- -5: Irc Channel Table

    433.25 139.25 289.25 439.25 145.25 295.25 445.25 151.25 301.25 451.25 157.25 307.25 457.25 163.25 313.25 463.25 169.25 319.25 469.25 175.25 325.25 475.25 181.25 331.25 481.25 187.25 337.25 487.25 193.25 343.25 493.25 199.25 349.25 499.25 DS1001A/DS1001G User Manual D- - 9...
  • Page 123: Table D- -6: Hrc Channel Table

    216.00 66.00 144.00 222.00 72.00 150.00 228.00 78.00 156.00 234.00 84.00 162.00 240.00 90.00 168.00 246.00 96.00 174.00 252.00 102.00 180.00 258.00 108.00 186.00 264.00 114.00 192.00 270.00 120.00 198.00 276.00 126.00 204.00 282.00 DS1001A/DS1001G User Manual D- - 10...
  • Page 124 468.00 582.00 348.00 474.00 588.00 354.00 480.00 594.00 360.00 486.00 600.00 366.00 372.00 492.00 606.00 378.00 498.00 612.00 384.00 504.00 618.00 390.00 510.00 624.00 396.00 516.00 630.00 402.00 522.00 636.00 408.00 414.00 528.00 642.00 DS1001A/DS1001G User Manual D- - 11...
  • Page 125: Table D- -7: Broadcast Channel Table

    603.25 741.25 471.25 609.25 747.25 477.25 615.25 753.25 483.25 621.25 759.25 489.25 627.25 765.25 495.25 633.25 771.25 501.25 639.25 777.25 507.25 645.25 783.25 513.25 651.25 789.25 519.25 657.25 795.25 525.25 663.25 801.25 531.25 669.25 DS1001A/DS1001G User Manual D- - 12...
  • Page 126: Appendix E: Factory Default Settings

    615.25 MHz ZCP State ZCP Line Number 16 (F1) ZCP Position Audio 1 Output Mode Stereo Audio 2 Output Mode AFC State Sound Trap State Signal Source BTSC Stereo Noise Threshold BTSC SAP Noise Threshold DS1001A/DS1001G User Manual E- - 1...
  • Page 127: Table E- -2: System Default Settings

    Position Message (IDN command) Set to ASCII space character Manual Frequency Response (All frequency steps) User Defined Channel Table 200.00 MHz (All channels) Serial Mode RS232 Unit Address RS232 Handshake Status Enabled RS485 Termination Terminated DS1001A/DS1001G User Manual E- - 2...
  • Page 128: Glossary

    Glossary...
  • Page 130 4.43 MHz (PAL) or 3.58 MHz (NTSC) subcarrier with R-Y and B-Y information. Composite Video A single video signal containing all of the necessary information to reproduce a color picture. DS1001A/DS1001G User Manual Glossary- - 1...
  • Page 131 In television, it refers to one of the following descriptions: 1. An instrument, such as the Tektronix DS1001A, which takes video in its transmitted form (modulated onto the picture carrier) and converts it to baseband.
  • Page 132 (For example, a modulated ramp has subcarrier on each step.) Modulation A process that moves information around in the frequency domain in order to facilitate transmission or frequency-domain multiplex- ing. DS1001A/DS1001G User Manual Glossary- - 3...
  • Page 133 These are the three color components generated by the camera and used by the picture monitor to produce a picture. Second Audio Program. Second language transmitted on a separate audio track. DS1001A/DS1001G User Manual Glossary- - 4...
  • Page 134 Abbreviation for luminance. Zero Carrier Reference Pulse (ZCP) A pulse in the vertical interval which is produced by the demodulator to provide a reference for evaluating the depth of modulation. DS1001A/DS1001G User Manual Glossary- - 5...
  • Page 135 Glossary DS1001A/DS1001G User Manual Glossary- - 6...
  • Page 136: Index

    Index...
  • Page 138 Cleaning, the exterior surface, C- -2 status display, 2- -9 Commands, B- -12 AFC, B- -12 AUD_OUT, B- -13 AUD_PREF, B- -15 Baud rate, B- -1 BTSC, B- -17 BTSC, remote command, B- -17 CHANNEL, B- -18 DS1001A/DS1001G User Manual Index- - 1...
  • Page 139 Configure menu, 3- -1 GCR module status, 2- -11 programs, 3- -3 instrument identification, 2- -12 quick guide, 3- -2 program set up, 2- -12 RS232 handshaking, 3- -12 selecting, 2- -8 RS485 address, 3- -11 DS1001A/DS1001G User Manual Index- - 2...
  • Page 140 1- -6 left and right buttons, 2- -2 Instrument, firmware revision, 2- -13 PROGRAM button, 2- -2 up and down buttons, 2- -2 Fuse AC fuse location, 2- -3 replacing, C- -2 DS1001A/DS1001G User Manual Index- - 3...
  • Page 141 PATH, remote command, B- -29 lock/unlock front panel, 2- -13 Performance requirements, specifi- LOG, remote command, B- -26 cations, A- -1 Phone number, Tektronix, x Physical characteristics, A- -3 Pin out, of serial port, B- -2 Polling Mains source, 1- -4...
  • Page 142 Replacing the fuse, C- -2 selecting the mode, 3- -11 REPORT, remote command, B- -33 selecting the port protocol, 3- -11 RF input, 2- -8 sending and receiving data, B- -5 description, 2- -4 signal strength, 2- -9 DS1001A/DS1001G User Manual Index- - 5...
  • Page 143 A- -1 video, A- -1 Standard accessories, 1- -2 Status firmware revision, 2- -13 Web site address, Tektronix, x instrument identification, 2- -12 of audio outputs, 2- -9 of GCR module, 2- -11 of program set up, 2- -12...

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