Symmetricom 58502A User Manual
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Symmetricom 58502A User Manual

Symmetricom 58502A User Manual

Broadband distribution amplifier
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097-58502-01
Issue 1: Mar 00
58502A
Broadband Distribution
Amplifier
User's Guide
Copyright © 2000 Symmetricom, Inc. All rights reserved. Printed in U.S.A.

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Summary of Contents for Symmetricom 58502A

  • Page 1 097-58502-01 Issue 1: Mar 00 58502A Broadband Distribution Amplifier User’s Guide Copyright © 2000 Symmetricom, Inc. All rights reserved. Printed in U.S.A.
  • Page 2 This manual provides information on the 58502A Warning Symbols That May Be Used In This Book Broadband Distribution Amplifier, including performance tests, command reference, functional description, service, and specifications. Instruction manual symbol; the product will be marked with this For assistance, contact: symbol when it is necessary for the user to refer to the instruction manual.

  • Page 3: Table Of Contents

    Manuals Getting Started 58502A Broadband Distribution Amplifier at a Glance Preparing the Distribution Amplifier for Use To Mount the 58502A Into an Equipment Rack (Using Option AX4) To Connect AC Power Connecting a Terminal or Computer to the 58502A ®...
  • Page 4 Test 2: +15 dBm Input Level 2-13 58502A Performance Test Record (Page 1 of 2) 2-14 58502A Performance Test Record (Page 2 of 2) 2-15 58502A Calibration (Option 010 Only) 2-16 Overview 2-16 Equipment 2-17 Procedures 2-17 Determining Frequency Difference...
  • Page 5 RS-232 Port Configuration Making Changes to the Serial Port Settings (If Needed) Determining the Serial Port Settings Connecting a Terminal or Computer To Connect a Terminal or Computer to the 58502A Different Ways to Check Alarm Status 3-11 Configuring the Inputs 3-11...
  • Page 6 Contents Service Introduction Determining 58502A Fault Status Specifications Introduction Index User’s Guide...

  • Page 7: In This Guide

    Guide Organization Table of Contents Chapter 1, “Getting Started,” provides an overview of the 58502A Broadband Distribution Amplifier’s indicators, connectors, inputs, and outputs. This chapter also provides installation, power-up instructions, and sample commands to familiarize you with the 58502A.

  • Page 8: Description Of The 58502A Broadband Distribution Amplifier

    The 58502A has two features that ensure your critical frequencies are always present. First, there is the auto-switching feature. When the 58502A detects one of its inputs is removed or the amplitude of the input is greatly reduced, it will automatically switch to the other input.

  • Page 9: Rs-232C Port And Indicators Features

    Querying through the RS232 serial interface port and viewing the front-panel LEDs or indicators facilitate monitoring the system. Registers within the 58502A allow you to query, through the RS232 interface port, the individual distribution input and output channels for the presence or absence of a signal. Front-panel status indicators provide you with a quick visual indication of individual channel health.
  • Page 10 In This Guide User’s Guide...

  • Page 11: Getting Started

    Getting Started...

  • Page 12: 58502A Broadband Distribution Amplifier At A Glance

    Chapter 1 Getting Started 58502A Broadband Distribution Amplifier at a Glance 58502A Broadband Distribution Amplifier at a Glance CAUTION: METRIC & INCH HARDWARE CONSULT SERVICE MANUAL User’s Guide...
  • Page 13 Chapter 1 Getting Started 58502A Broadband Distribution Amplifier at a Glance NOTE See Chapter 3, “Features and Functions,” for a detailed discussion of the items described below. 1 When the Power indicator lights, it 6 RS232 serial interface port allows...

  • Page 14: Preparing The Distribution Amplifier For Use

    To Mount the 58502A Into an Equipment Rack (Using Option AX4) 1 Position the 58502A on your work surface with the front panel facing you. 2 As shown in Figure 1-1, place the long side of an angle bracket (1), part number 58502-00004, with its four mounting holes aligned with the four holes present on the 58502A front side.

  • Page 15: To Connect Ac Power

    58502A and to change setup parameters. 1 If you are going to communicate with the 58502A using a terminal or PC (personal computer), connect the computer to the rear-panel RS232...
  • Page 16 Chapter 1 Getting Started Connecting a Terminal or Computer to the 58502A to communicate via the RS-232 serial port. Most PCs contain a terminal emulation program, especially PCs equipped with Windows. If your PC does not contain a telecommunication program, purchase one of the following programs: PROCOMM PLUS (DATASTORM Technologies, Inc.®), PROCOMM PLUS for Windows, Cross Talk...

  • Page 17: To Configure Terminal Communications For Nt 4.0 ® /Windows ® 95-Based Pc

    2 Select Accessories, Hyperterminal, and Hyper Terminal. The Connection Description dialog box is displayed. 3 In the “Name” window, type 58502A (for example), select one of the icons (the first one will do), then click OK. The Connect To dialog box is displayed.

  • Page 18: To Configure Terminal Communications For Windows ® -Based Pc

    Stop Bits: See the important NOTE on page 1-7 that provides information on NOTE what to do if the factory-default values of the 58502A’s RS-232 port have been changed. 4 In the Communications dialog box, be sure to select the appropriate port or connector (COM1, for example).

  • Page 19: Powering Up The Distribution Amplifier

    Distribution Amplifier. (See the subsection “To Connect AC Power” on page 1-5.) If an input signal is connected to either input A or B, the 58502A should now be distributing the input signal to all 12 output ports. User’s Guide...
  • Page 20 System Interface cable (DTE) 100-240 VAC 50/60GHz 40 VA Max 5 VRMS MAX Input (s) 58502A Distribution RS232 Amplifier Port (DTE) Figure 1-3. Inputs and Outputs Connections For Your System (Terminal or PC is Optional) 1-10 User’s Guide...

  • Page 21: Using Commands To Control Key Functions (Examples)

    • re-enter the correct command string at the scpi> prompt. There are four types of signal distribution that can be used with the 58502A: • Distribution of one input (A or B) • Distribution of two inputs (A and B) •...

  • Page 22: Setup Commands For The Different Distribution Applications

    INP:B:QUES?, and press Return. If 0 is returned, input signal is present. If 1 is returned, input signal is absent. The 58502A will distribute the one signal present regardless of which input channel is used. Distributing Two Input Signals (A and B) To Check the Input A Channel Signal Status Enter INP:A:QUES?, and press Return.

  • Page 23: Distributing Input A And Backup Oscillator (Option 010) Signals

    Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) To Check the Input Channel Automatic Switching Status Enter INP:SEL:AUTO?, and press Return. If 0 is returned, automatic switching is disabled. If 1 is returned, automatic switching is enabled. To Enable the Input Channel Automatic Switching Enter INP:SEL:AUTO 1, and press Return.

  • Page 24: Distributing Of The Backup Oscillator (Option 010) Signal Only

    Distributing of the Backup Oscillator (Option 010) Signal Only Just apply ac power to the 58502A. After powerup, allow the oscillator to warm up for 5 minutes before using the signal. You do not have to send a command. The oscillator will provide the output signals.

  • Page 25: Changing The Rs-232 Serial Port Characteristics

    To Check Instrument Identification Enter *IDN?, and press Return. A quoted identification string is returned, similar to the following: HEWLETT-PACKARD, 58502A,3426A–00123,3422 – A To Clear the Error Queue Enter *CLS, and press Return. The error message disappears and the scpi> prompt returns.
  • Page 26 Chapter 1 Getting Started Using Commands to Control Key Functions (Examples) To Set Baud Rate, Pacing, Parity, and Data Bits To set the baud rate, for example, to 19200, enter SYST:COMM:SER:BAUD 19200 and press Return. To set pacing, for example, to XON enter SYST:COMM:SER:PACE XON and press Return.
  • Page 27 Performance Tests Verifying Specifications...

  • Page 28: Performance Tests Introduction

    It also provides calibration procedures for the 58502A units that contain the Option 010 Backup Oscillator. Three types of testing are provided: •...
  • Page 29 Chapter 2 Performance Tests Introduction User’s Guide...

  • Page 30: Test Equipment Required

    Chapter 2 Performance Tests Test Equipment Required Test Equipment Required Table 2-1. Recommended Test Equipment Instrument Required Characteristics Recommended Model Signal Generator Frequency Range: 100 kHz to 10 MHz HP 8663A (or equivalent) OV, P Output Level: +6 to +16 dBm Harmonic Distortion:<-30 dBc Spurious Distortion:<-80 dBc Digitizing...

  • Page 31: 58502A Operational Verification

    HP 54600B Oscilloscope; however, if you are not using this scope DO NOT use the 50Ω feedthrough.) • BNC Cables (1 meter, male-to-male) Input amplitude at the 58502A input A or B connector must be below CAUTION 5 Vrms (+27 dBm) or damage to the Amplifier will occur.
  • Page 32 58502A Operational Verification 3 Connect the equipment as shown in Figure 2-1. (Connect the Signal Generator output to the 58502A’s input A or B rear-panel input, and connect oscilloscope Channel 1 to output 1 port of the 58502A. HP 54600B...

  • Page 33: Alarm And Status Output Verification

    Chapter 2 Performance Tests 58502A Operational Verification Alarm and Status Output Verification 1 Connect the equipment as shown in Figure 2-2, using output 12 as the test output. (Note that any one of the outputs can be used for this alarm verification.)
  • Page 34 If the Alarm indicator illuminates and output pins 2, 3, and 4 go low, then all associated ALARM/STATUS output circuitry is functional. 4 Mark Pass or Fail in Line 2 on the Operational Verification portion of the 58502A Performance Test Record, located on page 2-14. This completes the operational verification. User’s Guide...

  • Page 35: Rs-232 Verification (Optional)

    Chapter 2 Performance Tests 58502A Operational Verification RS-232 Verification (Optional) You may skip this verification if you do not plan to use the RS232 port. NOTE 1 Apply the proper power source to the rear-panel AC input jack of the Distribution Amplifier.
  • Page 36 Parity: NONE Data Bits: 8 Stops Bits: 1 If needed, see “Connecting a Terminal or Computer to the 58502A” starting on page 1-5 in Chapter 1 for information on setting above parameters. a. Press Return (or Enter) key on the PC.

  • Page 37: 58502A Performance Tests

    DO NOT use the 50Ω feedthrough.) Input Level Response Tests A 10 MHz signal is input to the 58502A from a signal generator. The level of this signal is adjusted from +7 dBm to +15 dBm while the twelve Outputs are verified for a 0.707 to 1.12 Vrms signal.

  • Page 38: Test 1: +7 Dbm Input Level

    2 Set the signal generator to: FREQUENCY: 10 MHz LEVEL: +7 dBm 3 Connect the signal generator output to the 58502A input A or B rear- panel input connector as shown in Figure 2-6. Ω 4 Connect the RMS voltmeter via the 50 load to the 58502A Output 1 as shown in Figure 2-6.

  • Page 39: Test 2: +15 Dbm Input Level

    2 Verify that the RMS voltage on each of the twelve Outputs is from 0.707 to 1.12 Vrms. 3 Record the reading of each output channel on the Performance Tests portion of the 58502A Performance Test Record in the Test 2 section, located on page 2-15. This completes the performance tests.

  • Page 40: 58502A Performance Test Record (Page 1 Of 2)

    Chapter 2 Performance Tests 58502A Performance Test Record (Page 1 of 2) 58502A Performance Test Record (Page 1 of 2) Model 58502A Broadband Distribution Amplifier Serial Number:_______________________________ Repair/Work Order No.__________________ Test Performed By:___________________________ Temperature:___________________________ Date:________________________________________ Relative Humidity:______________________ Notes: ______________________________________________________________________________ Line Number...
  • Page 41 Chapter 2 Performance Tests 58502A Performance Test Record (Page 2 of 2) 58502A Performance Test Record (Page 2 of 2) 58502A Performance Tests (Continued) Input Level Response Tests (Continued) Test 2: +15 dBm Input Level Minimum Actual Reading (Outputs 1 – 12) Maximum 0.707 Vrms <...

  • Page 42: 58502A Calibration (Option 010 Only)

    ( /year). Refer to the specifications in Chapter 7 to ensure that the 58502A oscillator has warmed up for a sufficient period of time to make this adjustment. When attempting to calibrate the 58502A with the SCPI software...

  • Page 43: Equipment

    (Reference) input as shown in Figure 2-7. 2 Connect any output of the 58502A to the Counter’s input as shown in Figure 2-7. 3 Set the Counter’s gate time to 1-second to display at least 10 digits (10,000,000.000).

  • Page 44: Software Oscillator Adjustment

    Chapter 2 Performance Tests 58502A Calibration (Option 010 Only) Ref. In Port1 50Ω Feedthrough 10 MHz External (HP 10100C) Reference Out BNC Cable HP 53131A HP 5071A Universal Primary Frequency Counter Standard or equivalent or equivalent 5071A PRIMARY FREQUENCY STANDARD...
  • Page 45 Chapter 2 Performance Tests 58502A Calibration (Option 010 Only) 2 Use the terminal and serial port to send one of the following SCPI commands to incrementally adjust the EFC control signal to bring the oscillator frequency closer to 10 MHz:...

  • Page 46: Calibration Record (Page 1 Of 1)

    Chapter 2 Performance Tests Calibration Record (Page 1 of 1) Calibration Record (Page 1 of 1) Model 58502A Option 010 Broadband Distribution Amplifier Serial Number: ___________________________ Repair/Work Order No. _________________ Test Performed By: _______________________ Temperature: __________________________ Date: _____________________________________ Relative Humidity: ____________________...

  • Page 47: Features And Functions

    Features and Functions...

  • Page 48: Chapter Contents

    Chapter 3 Features and Functions Chapter Contents Chapter Contents You will find that this chapter makes it easy to look up all the details about a particular feature of the 58502A Broadband Distribution Amplifier. This chapter is organized as follows: • Inputs page 3-3 –...

  • Page 49: Inputs

    If input A signal goes away while there is a signal at input B, the auto-switching feature automatically switches to using the input B signal. However, if the input A signal returns, the 58502A will continue to use the input B signal. It will not return to using the input A signal until you send the SCPI commands INP:SEL A and INP:SEL:AUTO 1.

  • Page 50: Alarm/Status Port

    The output pins (2, 3, and 4) of this port, shown in Figure 3-1, allow you to monitor the status of the 58502A. Output pins 2, 3, and 4 are a TTL high (3.5 Vdc, minimum) when operation is normal, and TTL low (1.5 Vdc, maximum) if there is an alarm.

  • Page 51: Alarm/Status Port Inputs

    ALARM/STATUS connector. Conversely, similar actions occur when an alarm input from the device connected to input B is received by the 58502A, except the alarm information is routed to pin 7 of the ALARM/STATUS connector. The INP:ALARM? query returns the alarm status of frequency sources connected to pins 6 and 7.

  • Page 52: Indicators

    Power Alarm Input Input This indicator lights when the input power is supplied to the 58502A. The indicator cannot be set or queried via the serial interface. Alarm Indicator This indicator lights when an alarm is detected in the distribution system.

  • Page 53: Serial Interface Ports

    This serial interface port allows you to remotely control and monitor the 58502A. See the section “Connecting a Terminal or Computer” starting on page 3-9 for information on interface cable use.

  • Page 54: Making Changes To The Serial Port Settings (If Needed)

    At each step, you will have stopped serial communications and be forced to modify your PC settings to match the 58502A in order to continue. It is recommended that you make all changes in a single compound command, verify the changes, and record all parameters.

  • Page 55: Connecting A Terminal Or Computer

    SYST:COMM:SER:SBITS? Connecting a Terminal or Computer To connect the 58502A to a terminal or computer, you must have the proper interface cable. Most computers are DTE (Data Terminal Equipment) devices. Since the 58502A is a DTE device, you must use a DTE-to-DTE interface cable when connecting to a computer.

  • Page 56: 58502A

    Connecting a Terminal or Computer Terminal or PC HP 24542U, F1047-80002 or equivalent 58502A Interface cable Distribution (DTE) Amplifier 100-240 VAC 50/60GHz 40 VA Max 5 VRMS MAX RS232 Port (DTE) Figure 3-3. Connecting a PC or Terminal to the 58502A 3-10 User’s Guide...

  • Page 57: Different Ways To Check Alarm Status

    The 58502A Broadband Distribution Amplifier can be manually operated, or operated with a computer or terminal for enhanced features. The 58502A can be manually operated in all four modes of operation as described in the following paragraphs. To Configure One Input Operation Connect the input signal to either input A or B.

  • Page 58: To Configure The Internal Oscillator As A Backup (Option 010)

    To Configure the Internal Oscillator as a Backup (Option 010) Connect the input signal to input A . Then connect the 58502A to ac power. The internal oscillator will provide the source signal for the 58502A only if input A signal fails. After powerup, allow the oscillator to warm up for 5 minutes before using the signals.

  • Page 59: Command Reference

    Command Reference...

  • Page 60: Chapter Contents

    Chapter 4 Command Reference Chapter Contents Chapter Contents This chapter provides a description for each command that can be used to operate the 58502A Broadband Distribution Amplifier. This chapter is organized as follows: • SCPI Conformance page 4-3 – Command Syntax Conventions page 4-3 –...

  • Page 61: Scpi Conformance Information

    Chapter 4 Command Reference SCPI Conformance Information SCPI Conformance Information The Standard Commands for Programmable Instruments (SCPI) commands used in the 58502A are in conformance with the SCPI Standard Version 1992.0. Command Syntax Conventions An element inside brackets is optional. Note, the brackets are NOT part of the command and should not be sent to the instrument.

  • Page 62: 58502A Command Summary

    Chapter 4 Command Reference 58502A Command Summary 58502A Command Summary Table 4-1 lists and briefly defines all of the commands that can be used to operate the 58502A. Table 4-1. 58502A Command Summary Keyword/Syntax Parameters Description *CLS Clears error queue.
  • Page 63 Chapter 4 Command Reference 58502A Command Summary Table 4-1. 58502A Command (Continued) Summary Keyword/Syntax Parameters Description INPut (Continued) INPUT Subsystem (Continued) :AUTO append 0 or OFF, or Enables or disables the automatic input switching feature. 0 or 1 or ON OFF disables it while 1 or ON enables it.

  • Page 64: System Status Reporting Commands

    *CLS This command clears the error queue. ALARm? This query returns alarm status of the 58502A. Returns a single character, 0 or 1. A value of 0 indicates alarm is off; a value of 1 indicates alarm is on. If any of the outputs are not functional or there is an input alarm there may be additional internal conditions that generate alarm), 1 is returned.
  • Page 65 Chapter 4 Command Reference System Status Reporting Commands OUTPut:QUEStionable[:UNPacked]? This query returns the status on each output (lowest numbered output to highest). Returns array of Boolean. 0 = signal at output; 1 = no signal at output. Same result as PACKed? (see prior command), but information on each output is provided with separate value.

  • Page 66: Identification Command

    A sequence of ASCII-encoded bytes: HEWLETT-PACKARD, 58502A, XXXXY–ZZZZZ, WWWW – V where 58502A is the product model number, XXXXYZZZZZ is the product serial number, and WWWW is the product’s firmware revision date code, and V is the hardware revision letter.

  • Page 67: Internal Oscillator Calibrating And Status Commands (Option 010 Only)

    Chapter 4 Command Reference Internal Oscillator Calibrating and Status Commands (Option 010 Only) Internal Oscillator Calibrating and Status Commands (Option 010 Only) DIAGnostic:CALibration:ROSCillator:EFC:ABSolute UP | DOWN This command sets the absolute EFC (electronic frequency control) of the oscillator. Use UP or DOWN to adjust the EFC by the increment specified in the STEP command described below.
  • Page 68 Chapter 4 Command Reference Internal Oscillator Calibrating and Status Commands (Option 010 Only) [SOURce]:ROSCillator:WARM? This query reports if the internal oscillator is warmed up. Returns a single character, 0 or 1. A value of 0 indicates oscillator is not warm. A value of 1 indicates oscillator output is warm.

  • Page 69: Input Port Status And Setup Commands

    Chapter 4 Command Reference Input Port Status and Setup Commands Input Port Status and Setup Commands INPut:A:QUEStionable? This query reports if there is a signal present on input A. Returns a single character, 0 or 1. A value of 0 indicates signal is present (not questionable). A value of 1 indicates no signal is present.
  • Page 70 Chapter 4 Command Reference Input Port Status and Setup Commands INPut:SELect? This query indicates which input is selected as the source input. Returns single character, A or B. INPut:SELect:AUTO 0 | 1 This command enables or disables the automatic input switching feature.

  • Page 71: Serial Interface Communication Commands

    Chapter 4 Command Reference Serial Interface Communication Commands Serial Interface Communication Commands SYSTem:COMMunicate:SERial:BAUD <numeric_value> This command sets the baud rate of the RS-232 port. The possible baud rate values that can be entered are 1200, 2400, 9600, or 19200. The baud rate value is stored in non-volatile memory. It is unaffected by powerup.
  • Page 72 The choices are EVEN, ODD, or NONE. The parity state is stored in non-volatile memory. It is unaffected by powerup. If parity is enabled, the 58502A sends/receives 7 data bits plus 1 parity bit. If parity is disabled, the 58502A sends/receives 8 data bits. SYSTem:COMMunicate:SERial:PARity? This query returns the parity setting of the RS-232 port.
  • Page 73 Functional Description...

  • Page 74: Functional Description Introduction

    Chapter 5 Functional Description Introduction Introduction This chapter gives a simplified functional description of the 58502A Broadband Distribution Amplifier. The 58502A provides twelve-channel isolation and distribution for a input timing signal, which frequency can range from 100 kHz to 10 MHz. User’s Guide...

  • Page 75: Functional Block Description Of The 58502A

    The 58502A electronic circuits consist of five primary blocks: • Controller • Panel LEDs • 2-to-1 Switch • 1-to-12 Amplifiers and Isolators • Power Supply Module Figure 5-1 is a simplified, overall-block diagram the 58502A circuitry. status Panel LEDs Controller RS-232...

  • Page 76: Controller Block

    Chapter 5 Functional Description Functional Block Description of the 58502A Controller Block This block provides remote instrument management via commands transferred through the RS-232 serial port. It also provides hardware output alarm signals via the Alarm/Status connector that go active when the controller block lights the front-panel system status alarm indicator.

  • Page 77: 1-To-12 Amplifiers And Isolators Block

    Chapter 5 Functional Description Functional Block Description of the 58502A 1-to-12 Amplifiers and Isolators Block This block consists of twelve separate individual isolation amplifiers that accomplish the distribution of the source frequency (ranging from 100 kHz to 10 MHz) into twelve available output channels with very low phase noise and signal distortion at the rear-panel output BNC connectors.
  • Page 78 Chapter 5 Functional Description Functional Block Description of the 58502A User’s Guide...
  • Page 79 Service...

  • Page 80: Determining 58502A Fault Status

    “58502A Performance Tests” in Chapter 2, “Performance Test,” of this guide. If the performance tests pass, Re-check all system input signals and output loads connected to the 58502A and troubleshoot them as required. If performance tests fail, go to step 5.
  • Page 81 Specifications...
  • Page 82 Introduction Introduction This chapter provides electrical specifications and supplemental characteristics for the 58502A Broadband Distribution Amplifier. Electrical specifications describe the instrument’s warranted performance. Supplemental characteristics are intended to provide information useful to apply to the instrument by giving typical or nominal, but non-warranted performance parameters.
  • Page 83 Chapter 7 Specifications Introduction Electrical Specifications Environmental Specifications Input, A or B Temperature Frequency Range: 0.1 MHz to 10 MHz Operating: 0° C to +55° C −40° C to +70° C Impedance: 50Ω nominal Non-operating: SWR <1.5 EMI: CISPR 11, Group 1, Amplitude: +15 dBm maximum Class B...
  • Page 84 Chapter 7 Specifications Introduction User’s Guide...
  • Page 85 Index auto-switch feature viii SYSTEem auto-switching feature viii COMMunicate SERial1 baud 4-13 BAUD? 4-13 baud rate SYSTem COMMunicate calibration record 2-20 BAUD? Cesium viii 4-13 channel BITS? 4-13 inputs viii FDUPlex? 4-14 channels PACE? 4-14 input A PARity? input B 4-14 outputs viii...
  • Page 86 Alarm command syntax Input A Input B OUTPUT STATUS (1-12) data bits 4-13 Power Data Terminal Equipment INPut default values 2-10 B:QUEStionable? 4-11 description input commands channels description of HP 58502A viii Input A indicator Index-2 User’s Guide...
  • Page 87 Index Input B indicator OUTPUT STATUS (1-12) indicators input channel input channels viii OUTPut:QUEStionable:PACKed? Input Level Response Test 2-11 command input ports viii OUTPut:QUEStionable:PACked? input A viii OUTPut:QUEStionable:UNPacked? input A outputs Input A indicator (1-12) input B viii 1-12 outputs Input B indicator outputs (1-12) INPut:A:QUEStionable?
  • Page 88 2-15 theory of operation secondary input signal 3-11 These self-test twelve outputs serial interface cables serial interface ports serial number using the HP 58502A 3-11 serial port configuring verification factory default values operational RS-232 setting serial port settings changing...

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