User Manual
Table Of Contents
- Foreword
- PSG Limited Equipment Warranty for U.S. And Canadian Markets
- PSG Limited Equipment Warranty for NonU.S. and Non-Canadian Markets
- Introduction 1
- System Description 2
- The Wireless Messaging System Overview
- FLEX, ReFLEX and InFLEXion Messaging Protocol Overview
- RF-B! Transmitter Controller Functional Description
- RF-Baton! Transmitter Controller Specifications
- Preinstallation 3
- Installation 4
- Operation 5
- Maintenance 6
- Troubleshooting
- Data Path Diagnostics
- GPS Diagnostics
- Removal and Installation
- Assigning an RF-B! Transmitter Controller to a Multicast Group
- Remote Software Download from Choreographer! Network Manager
- Local Software Download Using the Front Panel
- Parameter Database Updating
- Abbreviations and Acronyms A
- Connector Pinouts B
- FIPS Action Commands and Parameter IDs C
- Alarms and Error Messages D
- Traces E
Maintenance RF-Baton! Transmitter Controller Installation and Operation
6-28 6880497G01-B June 1999
3. Request the GPS receiver status.
At the prompt, type:
a 208 <Enter>
The terminal displays:
• Visible Satellites—the number of visible satellites is recorded in the Motorola GPS
receiver almanac and is the maximum number of satellite signals that the GPS receiver
expects to receive at any one time. If the GPS almanac is bad, the visible satellites value is
reported as NA.
• Tracked Satellites—this value is the number of satellite signals currently being received.
The tracked satellites value is a subset of the visible satellites value and should always be
less than or equal to the visible satellites value. At least four satellites must be reported in
Mode=8 to initialize the GPS receiver. At least three satellites must be reported to
maintain GPS lock and operate in the Simulcast manager State 4.
• Receiver Status—should always be 8 after GPS initialization.
• Signal Strength—the Trimble GPS receiver requires a minimum SNR of 4 decibels (dB). If
the signal strength is poor, check the GPS antenna connections and ensure that the
antenna has a clear view of the horizon. Performance can also be affected by radio
frequency (RF) interference at 1.575 GHz.
For further information regarding the a 208 command output, see the action command
description table in Appendix C.
# visible satellites = 8, # tracked satellites = 6 receiver status = 0x8
ID=3 Mode=8 SS=34 Status=0xa8
ID=16 Mode=0 SS=102 Status=0x0
ID=18 Mode=8 SS=50 Status=0xa8
ID=19 Mode=8 SS=32 Status=0xa8
ID=22 Mode=5 SS=22 Status=0x20
ID=27 Mode=0 SS=102 Status=0x0