58503B
GPS Time and Frequency
Reference Receiver
097-58503-13
Issue 2: Jul 00
and
59551A
GPS Measurements
Synchronization Module
Operating and Programming
Guide
Copyright © 2000 Symmetricom, Inc. All rights reserved. Printed in U.S.A.
This guide describes how to operate the Symmetricom 58503B GPS Time and Frequency Reference Receiver and 59551A GPS Measurements
Synchronization Module via the RS-232C port(s).
The information in this guide applies to instruments
having the number prefix listed below, unless accompanied by a “Manual Updating Changes” package indicating otherwise.
SERIAL PREFIX NUMBER:3805A and above
(58503B), 3805A and above (59551A)
Warning Symbols That May Be Used In This Book
Instruction manual symbol; the product will be marked with this
symbol when it is necessary for the user to refer to the
instruction manual.
Instruments with serial numbers below 3805A may
have earlier versions of firmware installed. There
are no operator-specific differences in previous versions of firmware.
FIRMWARE REVISION:3805A and above
(58503B), 3805A and above (59551A)
Firmware revision can be identified by using a
“*IDN?” command sent to the Receiver via RS-232C
port. See the section “Connecting a Computer or Modem,” in Chapter 2, “Serial Interface Capabilities,”
of this guide for instructions on connecting a computer or modem to these products.
For assistance, contact:
Symmetricom, Inc.
2300 Orchard Parkway
San Jose, CA 95131-1017
U.S.A. Call Center:
888-367-7966 (from inside U.S.A. only – toll
free)
408-428-7907
Indicates hazardous voltages.
Indicates earth (ground) terminal.
or
Indicates terminal is connected to chassis when such connection
is not apparent.
Indicates Alternating current.
Indicates Direct current.
U.K. Call Center:
+44.7000.111666 (Technical Assistance)
+44.7000.111888 (Sales)
Fax: 408-428-7998
E-mail: ctac@symmetricom.com
Internet: http://www.symmetricom.com
Contents
In This Guide
1 Front and Rear Panels at a Glance
58503B Front Panel at a Glance 2
58503B/Option 001 Front-Panel Display/Keypad at a
Glance 3
58503B Rear Panel at a Glance 4
59551A Front Panel at a Glance 5
59551A Rear Panel at a Glance 6
2 Serial Interface Capabilities
Chapter Contents 2
About the RS-232C Serial Port(s) 3
PORT 1 Rear-Panel RS-232C Serial Port 3
PORT 2 Front-Panel RS-232C Serial Port (59551A Only) 4
Connecting a Computer or Modem 5
To Connect the GPS Receiver to a PC or Modem Via the
Rear-Panel PORT 1 6
Connecting to the Personal Computer (PC) 6
Connecting to a Modem 6
Making Your Own Cables 8
Configuring the RS-232C Port(s) 9
Making Changes to the Serial Port Settings (If Needed) 10
Configuring PORT 1 of the 59551A 10
Configuring PORT 1 of the 58503B and PORT 2 of the
59551A 10
Determining the Serial Port Settings 11
Standard 58503B and 59551A 11
3Visual User Interface
Chapter Contents 2
Using and Reading the Visual User Interface (the Receiver
Status Screen) 3
Tutorial on Using the Status Screen to Interface With the
Receiver 3
Demonstration of Holdover Operation 8
Receiver Status Screen Data 11
SYNCHRONIZATION Section of the Status Screen 12
SYNCHRONIZATION Summary Line 12
SmartClock Mode 12
Operating and Programming Guide iii
Contents
Reference Outputs 13
ACQUISITION Section of the Status Screen 14
ACQUISITION Line 14
Tracking, Not Tracking 14
Time 16
Position 17
HEALTH MONITOR Section of the Screen 18
The Receiver Status Screen at a Glance 20
4 Command Quick Reference
Chapter Contents 2
An Introduction to GPS Receiver Commands 4
SCPI Conformance Information 4
Command Syntax Conventions 4
Command Presentation 4
GPS Satellite Acquisition 5
1 PPS Reference Synchronization 7
Operating Status 8
System Time 10
Programmable Pulse Output (59551A Only) 11
Event Time Stamping (59551A Only) 12
Serial Interface Communication 13
Receiver Initialization 14
Receiver Identification/Upgrade 15
Receiver Commands at a Glance 17
Status Reporting System at a Glance 18
5 Command Reference
Chapter Contents 2
Command Syntax Conventions 4
Description Format 5
Commands and Returns 5
Query-Specific Information 6
Description of Response Formats (ASCII-encoded) 6
iv Operating and Programming Guide
Contents
GPS Satellite Acquisition 7
1 PPS Reference Synchronization 27
Operating Status 39
System Time 73
Programmable Pulse Output (59551A Only) 83
Event Time Stamping (59551A Only) 89
Serial Interface Communication 100
Receiver Initialization 109
Receiver Identification/Upgrade 113
A Error Messages
Introduction 2
Reading an Error 2
Error Queue 3
Error Types 4
No Error 4
Syntactic Error 4
Semantic Error 5
Hardware/Firmware Error 5
Query Error 5
General Error Behavior 6
List of Errors 7
B Command Syntax and Style
Appendix Contents 2
Command Types, Format, and Elements 3
Command Types 3
Command Formats 3
Common Command Format 3
SCPI Command and Query Format 3
Elements of SCPI Commands 4
Common Command Syntax 4
Subsystem Command Syntax 4
Abbreviated Commands 5
Keyword Separator 5
Parameter Data Types 5
Parameter Separator 6
Query Parameters 6
Suffixes 6
Suffix Elements 6
Suffix Multipliers 7
Command Terminator 7
Operating and Programming Guide v
Contents
Using Multiple Commands 7
Program Messages 7
Program Message Syntax 7
Elements of Response Messages 9
Response Messages 9
Response Message Syntax 9
Response Formats 10
Reference Documentation 12
C Receiver Firmware Installation
Downloading New Firmware Using SatStat Program 2
D Performance Tests
Introduction 2
Operational Verification 2
Complete Performance Tests 2
Test Record 2
Equipment Required 3
Before You Start 4
Operational Verification 5
Introduction 5
Power-Up Procedure 5
10 MHz Verification (58503B Only) 6
1 PPS Verification 6
IRIG-B Verification (59551A Only) 7
Time of Day and PORT 1 RS-232C Serial Interface
Verification 8
Antenna Power Verification 9
Front Panel Display/Keypad Verification (58503B Option 001
Only) 10
Time Tagging (Stamping) Verification and Programmable
Verification (59551A Only) 11
Programmable Pulse Verification (59551A Only) 13
Operational Verification Conclusion 15
In Case of Difficulty 16
Complete Performance Tests 17
Preliminary Test Setup 18
Test 1: 10 MHz Frequency Accuracy and 1 PPS Jitter (Locked to
GPS) 19
Specifications Tested 19
Procedure 19
Test 2: 10 MHz Holdover Aging and 1 PPS Accumulated Time
Error (Unlocked) 22
vi Operating and Programming Guide
Contents
Specifications Tested 22
Procedure 22
Test 3: 1 PPS Time Accuracy (Locked) 24
Test 4: 10 MHz Frequency Stability (Time Domain) and Phase
Noise (Frequency Domain) Measurements 24
Frequency Stability (Time Domain) 24
Phase Noise (Frequency Domain) 24
58503B Performance Test Record 26
59551A Performance Test Record 27
E 58503B Specifications
Specifications and Characteristics 2
GPS Receiver Features 2
Other Information 5
Options and Accessories 5
F 59551A Specifications
Specifications and Characteristics 2
GPS Receiver Features 2
Other Information 5
Options and Accessories 5
Command Index
General Index
Operating and Programming Guide vii
Contents
viii Operating and Programming Guide
In This Guide
Chapter 1, “Front and Rear Panels at a Glance,” provides overview
of the Receiver’s indicators, inputs, and outputs.
Chapter 2, “Serial Interface Capabilities,” provides RS-232 serial
interface port connection and configuration instructions.
Chapter 3, “Visual User Interface,” which is subtitled “Using the
Receiver Status Screen,” provides information on how to use the
Receiver Status screen and the SatStat program. An illustrated foldout
of the Receiver Status screen, which is a comprehensive summary of
key operation conditions and settings, is provided at the end of this
chapter.
Chapter 4,“Command Quick Reference,” is a quick reference that
summarizes the Receiver commands. The commands are presented or
grouped by their functions. A foldout sheet that presents all of the
commands on one side (Receiver Commands at a Glance) and
illustrates the status reporting system on the other side (Status
Reporting System at a Glance) is provided at the end of this chapter.
Chapter 5, “Command Reference,” provides a description of each
command that can be used to operate the GPS Receiver.
The commands are grouped by functions. The functions are grouped
and ordered the same as they are in Chapter 4, “Command Quick
Reference,” and on the foldout “Receiver Commands at a Glance
(cont’d).” A comprehensive discussion on how you can monitor and
control alarm conditions using the status registers is also provided in
this chapter.
Appendix A, “Error Messages,” lists all error messages the Receiver
could generate along with descriptions of possible causes for the errors.
Appendix B, “Command Syntax and Style,” provides an overview of
the Standard Commands for Programming Instrument (SCPI) syntax
and style to help you program the Receiver.
Appendix C, “Receiver Firmware Installation,” provides a
procedure for downloading new firmware to the GPS Receiver.
Appendix D, “Performance Tests,” provides procedures that verify
the GPS Receivers operate properly and meet electrical performance
specifications. Electrical performance is tested against the
specifications listed in Appendix E, “58503B Specifications,” and
Appendix F, “59551A Specifications,” in this guide.
Operating and Programming Guide ix
In This Guide
Appendix E, “58503B Specifications,” lists the product specifications
and characteristics.
Appendix F, “59551A Specifications,” lists the product specifications
and characteristics.
Command Index, lists all of the commands alphabetically and
provides page references.
General Index
x Operating and Programming Guide
1
Front and Rear Panels at a Glance
Chapter 1 Front and Rear Panels at a Glance
58503B Front Panel at a Glance
58503B Front Panel at a Glance
1 When the Power indicator
illuminates, it indicates that the
proper input power is supplied to the
Receiver.
2 When the GPS Lock indicator
illuminates, it indicates that the
Receiver is receiving the GPS signal
and is locked on one or more
satellite(s).
3 When the Holdover indicator
illuminates, it indicates that the
Receiver is NOT locked to the GPS
signal. The Receiver is keeping time
based on the internal reference
oscillator signal. The internal
reference oscillator will determine
the accuracy of the 1 PPS signal and
the 10 MHz reference output.
4 When the Alarm indicator
illuminates, it indicates that the
Receiver has detected an internal
condition that requires attention.
1-2 Operating and Programming Guide
Chapter 1 Front and Rear Panels at a Glance
58503B/Option 001 Front-Panel Display/Keypad at a Glance
58503B/Option 001 Front-Panel
Display/Keypad at a Glance
1 An alphanumeric display for displaying time, position (i.e., longitude,
latitude, and altitude), and Receiver status. The display is a highly visible
twelve-character vacuum-fluorescent display.
2 Status LED indicators:
When the Power indicator is illuminated, it indicates that input power is
supplied to the Receiver.
When the GPS Lock indicator is illuminated, it indicates that the
Receiver is tracking satellites and has phase-locked its internal reference
to the reference provided by GPS.
When the Holdover indicator is illuminated, it indicates that the Receiver
is not phase-locking its internal reference to the reference provided by
GPS. Typically, this would happen due to loss of satellite tracking.
When the Alarm indicator is illuminated, it indicates that the Module has
detected a condition that requires attention.
3 Eight MODE keys with associated LEDs for front-panel access to time,
position, and status information: Time, Long (longitude), Lat (latitude)
Alt (altitude), Sat (number of satellites tracking), Status (Receiver or
system status), and Serial Port (serial port settings). Each key selects a
different display mode. Also, pressing Shift and Alt key in sequence clears
instrument alarm.
Operating and Programming Guide 1-3
Chapter 1 Front and Rear Panels at a Glance
58503B Rear Panel at a Glance
58503B Rear Panel at a Glance
1 ANT N-type (female) connector for
GPS Antenna connection.
2 PORT 1 RS-232C, DB-25 (female)
serial interface port for remote
control, monitoring, and
downloading of the Receiver’s
memory data and upgrading
Receiver software.
3 10 MHz OUT output for user-specific
applications.
4 1PPS connector for outputting a
continuous 1 Pulse Per Second
signal.
Option 002 1PP2S
(One-Pulse-Per-Two-Seconds)
connector for outputting a pulse
every other second, synchronized to
the even seconds in GPS time.
Pulses occur on even-numbered
seconds (i.e., 2 seconds, 4 seconds,
etc.).
6 Alarm output for external devices
(such as red light, bell, or horn) to
indicate that the Receiver has
detected an internal condition that
requires attention.
7 POWER input jack.
1-4 Operating and Programming Guide
Chapter 1 Front and Rear Panels at a Glance
59551A Front Panel at a Glance
59551A Front Panel at a Glance
When the Power indicator
1
illuminates, it indicates that the
proper input power is supplied to
the Module.
2 When the GPS Lock indicator
illuminates, it indicates that the
Module is receiving the GPS signal
and is locked on one or more
satellite(s).
When the Holdover indicator
3
illuminates, it indicates that the
Module is NOT locked to the GPS
signal. The Module is keeping time
based on the internal reference
oscillator signal. The internal
reference oscillator will determine
the accuracy of the 1 PPS signal.
(See specification for Accuracy in
Holdover in Appendix F, “59551A
Specifications,” in this guide.)
4 When the Alarm indicator
illuminates, it indicates that the
Module has detected an internal
condition that requires attention.
5 PORT 2 RS-232C, DE-9S (female)
serial interface port for local
monitoring and retrieving data
stored in the Module’s memory
data.
Operating and Programming Guide 1-5
Chapter 1 Front and Rear Panels at a Glance
59551A Rear Panel at a Glance
59551A Rear Panel at a Glance
1 1PPS (One-Pulse-Per-Second)
connector for outputting a
continuous one pulse per second
signal.
2 Programmable Pulse output connector
for outputting pulses at user-specified
time/period.
3 IRIG-B output for outputting
formatted time-code signals. (This
signal is used for general purpose
time distribution and magnetic
tape annotation applications
requiring the time of year.)
4 Time tag input connectors for
receiving TTL conditioned time
tagging signals.
5 Alarm BITE (Built-In Test
Equipment) output for external
devices (such as red light, bell, or
horn) to indicate that the Module
has detected an internal condition
that requires attention. The relay
opens and closes with the Alarm
indicator. (Mating connector is
Amphenol part number 31-224
[glass-filled Noryl] or #31-2226
[Telfon]).
6 ANTENNA N-type (female)
connector for GPS antenna
connection.
7 PORT 1 RS-232C, DB-25 (female)
serial interface port for remote
control, monitoring, and retrieving
of the Module’s memory data and
upgrading Module software.
8 AC POWER input jack. The AC
input jack is standard. The unit
operates from ac voltage. It can also
be operated from dc voltage via this
ac jack by using the supplied IEC
320 dc connector plug.
1-6 Operating and Programming Guide
2
Serial Interface Capabilities
Chapter 2 Serial Interface Capabilities
Chapter Contents
Chapter Contents
This chapter describes how to operate the 59551A GPS Measurements
Synchronization Module and the 58503B GPS Time and Frequency
Reference Receiver via the RS-232C serial interface port. Hardware
connections and configuration are discussed.
This chapter is organized as follows:
• About the RS-232C Serial Port(s) page 2-3
– PORT 1 Rear-Panel RS-232C Serial Port page 2-3
– PORT 2 Front-Panel RS-232C Serial Port
(59551A Only)
• Connecting a Computer or Modem page 2-5
– To Connect the GPS Receiver to a PC or Modem Via
the Rear-Panel PORT 1
– To Connect the GPS Receiver to a PC or Modem Via
the Rear-Panel PORT 1
• Configuring the RS-232C Port(s) page 2-9
– Making Changes to the Serial Port Settings
(If Needed)
– Determining the Serial Port Settings page 2-11
page 2-4
page 2-6
page 2-6
page 2-10
2-2 Operating and Programming Guide
Chapter 2 Serial Interface Capabilities
About the RS-232C Serial Port(s)
About the RS-232C Serial Port(s)
The 58503B has only a rear-panel (PORT 1) RS-232C serial interface
port.
The 59551A has separate rear-panel (PORT 1) and front-panel
(PORT 2) RS-232C serial interface ports.
The rear-panel (PORT 1) RS-232C serial interface port is the only port
which can be used to upgrade the Receiver firmware; therefore, it is
referred to as the PRIMARY port. The 59551A’s front-panel (PORT 2)
RS-232C serial interface port is referred to as the SECONDARY port
because it cannot be used to upgrade the Receiver firmware. The
operation and configuration of these ports are described in the
following paragraphs. More information is provided in the sections
titled “Connecting a Computer or Modem” and “Configuring the
RS-232C Port(s)” in this chapter on page 2-5 and page 2-9,
respectively.
Either port allows you full communication with the Receiver. This can
be done by connecting any computer with an RS-232C serial interface
and suitable terminal emulation software, then sending the correct
commands for transmitting or retrieving data.
PORT 1 Rear-Panel RS-232C Serial Port
This 25-pin female subminiature D (DB-25) connector (PORT 1)
RS-232C Serial Interface Port is located on the rear panel.
The pins used for PORT 1 RS-232C communication are described in
Table 2-1.
NOTE We reserve the right to impose signals on other pins; therefore, your
connection should be restricted to the pins described in Table 2-1.
Table 2-1. PORT 1 Rear-Panel RS-232C Serial Port Connections
*Pin
Number
2 Output Transmit Data (TxD). GPS Receiver output.
3 Input Receive Data (RxD). GPS Receiver input.
7
Input/Output Description
_____
Signal Ground (SG)
Operating and Programming Guide 2-3
Chapter 2 Serial Interface Capabilities
About the RS-232C Serial Port(s)
Refer to the sections titled “Connecting a Computer or Modem” in this
chapter, on page 2-5, for wiring diagrams and more information on the
RS-232C interface cables.
PORT 2 Front-Panel RS-232C Serial Port
(59551A Only)
This 9-pin female subminiature D (DB-9) connector (PORT 2) RS-232C
Serial Interface Port is located on the front panel.
The pins used for PORT 2 RS-232C communication are described in
Table 2-2.
NOTE We reserves the right to impose signals on other pins; therefore, your
connection should be restricted to the pins described in Table 2-2.
Table 2-2. PORT 2 Front-Panel RS-232C Serial Port Connections
(59551A Only)
*Pin
Number
2 Input Receive Data (RxD). GPS Receiver input.
3 Output Transmit Data (TxD). GPS Receiver output.
5
Input/Output Description
_____
Signal Ground (SG)
Refer to the sections titled “Connecting a Computer or Modem” in this
chapter, on page 2-5, for wiring diagrams and more information on the
RS-232C interface cables.
2-4 Operating and Programming Guide
Chapter 2 Serial Interface Capabilities
Connecting a Computer or Modem
Connecting a Computer or Modem
To connect the GPS Receiver to a computer or modem, you must have
the proper interface cable. Most computers are DTE (Data Terminal
Equipment) devices. Since the Receiver is also a DTE device, you must
use a DTE-to-DTE interface cable when connecting to a computer.
These cables are also called “null-modem”, “modem-eliminator”, or
“crossover” cables.
Most modems are DCE (Digital Communication Equipment) devices;
thus, you must use a DTE-to-DCE interface cable.
The interface cable must also have the proper connector on each end
and the internal wiring must be correct. Connectors typically have
9 pins (DE-9 connector) or 25 pins (DB-25 connector) with a “male” or
“female” pin configuration. A male connector has pins inside the
connector shell and a female connector has holes inside the connector
shell.
To simplify interface cable selections, the following sections
tells you which cables to use.
Operating and Programming Guide 2-5
Chapter 2 Serial Interface Capabilities
Connecting a Computer or Modem
To Connect the GPS Receiver to a PC or Modem Via
the Rear-Panel PORT 1
Connecting to the Personal Computer (PC)
Use an HP 24542G interface cable or equivalent to connect the
Receiver’s rear-panel PORT 1 DB-25 female connector to a PC as
shown in Figure 2-1. See “Making Your Own Cables” starting on
page 2-8.
GPS Receiver
(Rear view)
NO OPERATOR SERVICEABLE PARTS INSIDE, REFER SERVICING TO SERVICE TRAINED PERSONNEL.
WARNING:
1 pps Programmable
WARNING:
INPUTS
OUTPUTS
Time Tag1Time Tag2Time Tag
Irig-B
TOD
! !
Port 1
FOR CONTINUED FIRE PROTECTION, USE SPECIFIED ~ LINE FUSE.
SERIAL PLATE
FOR LABORATORY USE BY
QUALIFIED PERSONNEL
FOUR USAGE EN LABORATOIRE
PAR PERSONNEL QUALIFIE
ANTENNA
ALARM BITE
3
!
POWER
129 VDC
48 VDC
129 VDC
!
Computer
HP 24542G
or equivalent
Figure 2-1. Connecting the GPS Receiver to a PC or Laptop
Connecting to a Modem
Use an HP 40242M interface cable or equivalent to connect the
Receiver’s rear-panel PORT 1 DB-25 female connector to a modem,
which is a DCE (Digital Communication Equipment) device, as shown
in Figure 2-2. See “Making Your Own Cables” starting on page 2-8.
2-6 Operating and Programming Guide
Chapter 2 Serial Interface Capabilities
Connecting a Computer or Modem
GPS Receiver
(Rear view)
NO OPERATOR SERVICEABLE PARTS INSIDE, REFER SERVICING TO SERVICE TRAINED PERSONNEL.
WARNING:
OUTPUTS
1 pps Programmable
Irig-B
TOD
! !
Port 1
FOR CONTINUED FIRE PROTECTION, USE SPECIFIED ~ LINE FUSE.
WARNING:
INPUTS
Time Tag1Time Tag2Time Tag
FOR LABORATORY USE BY
QUALIFIED PERSONNEL
FOUR USAGE EN LABORATOIRE
PAR PERSONNEL QUALIFIE
SERIAL PLATE
ANTENNA
ALARM BITE
3
!
POWER
129 VDC
48 VDC
129 VDC
!
HP 40242M
or equivalent
Modem set to
Auto-Answer
Telephone
Line
Figure 2-2 Connecting the GPS Receiver to a Modem
Operating and Programming Guide 2-7
Chapter 2 Serial Interface Capabilities
Connecting a Computer or Modem
Making Your Own Cables
If you choose to make your own cable, see Figure Figure 2-3 and
Figure Figure 2-4.
Figure Figure 2-3 illustrates how to make a DE-9S-to-DE-9P, DTEto-DCE interface cable that can replace the cable and adapter
combination of the HP 24542U cable and the HP 5181-6639 adapter for
use with PORT 2 of the 59551A.
RS-232C (9-pin)
PC input
PC output
Data
Terminal
Equipment
PC
RX
TX
GND
DE-9P
Male
DE-9S-to-DE-9P
(DTE-to-DCE) Interface Cable
11
22
33
44
55
66
77
88
99
DE-9S
Female
DE-9P
Male
Data
Communications
Equipment
59551A PORT 2
RS-232C (9-pin)
Instrument input
RX
Instrument output
TX
GND
DE-9S
Female
Figure 2-3 DE-9S-to-DE-9P (DTE-to-DCE) Serial Interface Connection
to PORT 2
Figure Figure 2-4 illustrates how to make a DE-9S-to-DB-25P,
DTE-to-DTE interface cable that can replace the HP 24542G cable
(25-pin male to 9-pin female connectors) for use with PORT 1.
RS-232C (9-pin)
PC input
PC output
Data
Terminal
Equipment
PC
RX
TX
GND
DE-9P
Male
1
2
3
4
5
6
7
8
9
DE-9S
Female
DE-9S-to-DB-25P
(DTE-to-DTE)
Interface cable
DB-25P
Male
Data
Terminal
Equipment
PORT 1
RS-232C (25-pin)
1
2
3
4
5
6
7
8
20
22
DB-25S
Female
TX
RX
GND
Instrument output
Instrument input
Figure 2-4 DE-9S-to-DB-25P (DTE-to-DTE) Serial Interface
Connection to PORT 1
2-8 Operating and Programming Guide
Chapter 2 Serial Interface Capabilities
Configuring the RS-232C Port(s)
Configuring the RS-232C Port(s)
The 59551A has separate rear-panel (PORT 1) and front-panel
(PORT 2) RS-232C serial interface ports.
The 58503B has one RS-232C serial interface port (PORT 1) on the
rear panel. Note: PORT 1 of the 58503B and PORT 2 of the 59551A
have the same configuration capabilities as indicated in Table 2-4.
Software pacing, baud rate, parity, data bits, and stop bits parameters
for each port are user-selectable and independent of the configuration
of the other.
Table 2-3 and Table 2-4 list the configuration factory-default values for
PORT 1 and PORT 2.
Table 2-3. Factory-Default Values for PORT 1 of the 59551A
Parameter Default Possible Choices
Software Pacing NONE XON or NONE
Baud Rate 9600 1200, 2400, 9600, or 19200
Parity NONE EVEN, ODD, or NONE
Data Bits 8 7 or 8
Stop Bits 1 1 or 2
Full Duplex ON ON or OFF
Table 2-4. Factory-Default Values for PORT 1 or the 58503B and
PORT 2 of the 59551A
Parameter Default Possible Choices
Software Pacing NONE XON or NONE
Baud Rate 9600 1200, 2400, 9600, or 19200
Parity NONE EVEN, ODD, or NONE
Data Bits 8 Fixed at 7 when parity is even or odd.
Fixed at 8 when parity is none.
Stop Bits 1 Fixed (no choices available)
Full Duplex ON ON or OFF
Procedures for configuring the RS-232C ports are provided in the
following paragraphs.
Operating and Programming Guide 2-9
Chapter 2 Serial Interface Capabilities
Configuring the RS-232C Port(s)
Making Changes to the Serial Port Settings
(If Needed)
CAUTION If you change the serial port settings, your changes will be
stored in the Receiver. Cycling power will not reset to factory
defaults. Therefore, if you make a change, it is recommended
that you record the settings and keep the record with the
Receiver.
If you need to change the serial port settings, for example, to set
up for a different computer, use the guidelines given in this
section.
Serial port settings are changed by issuing commands.
It is recommended that you issue a single compound command which
simultaneously sets all the serial port parameters. Then connect the
other computer and begin using the instrument with the new settings.
NOTE If you choose to set parameters one at a time, you will make the
procedure more difficult. That is, with each change, the instrument
will be updated, but your computer will retain its original settings.
At each step, you will have stopped serial communications and be
forced to modify your PC settings to match the Receiver in order to
continue. It is recommended that you make all changes in a single
compound command, verify the changes, and record all parameters.
Configuring PORT 1 of the 59551A
Complete configuration of PORT 1 of the 59551A requires that you set
five parameters. The command line sent in the following example
would set the RS-232C port pacing to XON, baud rate to 2400, parity to
EVEN, data bits to 7, and stop bits to 2. This command line must be
transmitted on PORT 1.
SYST:COMM:SER:PACE XON; BAUD 2400; PARITY EVEN; BITS 7; SBITS 2
Configuring PORT 1 of the 58503B and PORT 2 of the
59551A
Complete configuration of PORT 1 (58503B) and PORT 2 (59551A)
require that you set three parameters. The command line sent in the
following example would set the RS-232C port pacing to XON, baud
rate to 2400, and parity to EVEN. This command line must be
transmitted on PORT 1 or PORT 2.
SYST:COMM:SER2:PACE XON; BAUD 2400; PARITY EVEN
2-10 Operating and Programming Guide
Chapter 2 Serial Interface Capabilities
Configuring the RS-232C Port(s)
Determining the Serial Port Settings
Standard 58503B and 59551A
If you connect your PC, press Return, and do not get a scpi> prompt
back from the Receiver, your Receiver’s serial communication settings
may have been modified. You need to systematically step through the
data communication settings on your PC until your PC matches the
Receiver. The Receiver cannot communicate its settings until this
process is complete.
Iterate until you are able to verify that settings on your PC match the
Receiver.
When you are successful, you will have restored full RS-232C
communications, enabling you to query the Receiver’s communication
settings. Once you establish communications with one serial port, you
can query the Receiver for settings of either port.
Issue the following queries to either serial port to verify PORT 1’s
configuration.
SYST:COMM:SER:PACE?
SYST:COMM:SER:BAUD?
SYST:COMM:SER:PARITY?
SYST:COMM:SER:BITS?
SYST:COMM:SER:SBITS?
Issue the following queries to either serial port to verify PORT 2’s
configuration.
SYST:COMM:SER2:PACE?
SYST:COMM:SER2:BAUD?
SYST:COMM:SER2:PARITY?
SYST:COMM:SER2:BITS?
SYST:COMM:SER2:SBITS?
Operating and Programming Guide 2-11
Chapter 2 Serial Interface Capabilities
Configuring the RS-232C Port(s)
This page intentionally left blank.
2-12 Operating and Programming Guide
3
Visual User Interface
Using the Receiver Status Screen
Chapter 3 Visual User Interface
Chapter Contents
Chapter Contents
This chapter provides a tutorial section on how to use the Receiver
Status Screen, a comprehensive reference information section, and an
illustrated foldout of the Receiver Status Screen, which is a
comprehensive summary of key operation conditions and settings.
This chapter is organized as follows:
• Using and Reading the Visual User Interface (the
Receiver Status Screen)
– Tutorial on Using the Status Screen to Interface With
the Receiver page 3-3
– Demonstration of Holdover Operation page 3-8
• Receiver Status Screen Data page 3-11
– SYNCHRONIZATION Section of the Status Screen page 3-12
– ACQUISITION Section of the Status Screen page 3-14
– HEALTH MONITOR Section of the Screen page 3-18
• The Receiver Status Screen at a Glance (foldout) page 3-20
page 3-3
3-2 Operating and Programming Guide
Loading...