Symmetricom 58503B, Руководство по началу работы

Страница: 8 / 90

In This Guide
viii Getting Started Guide
Description of the GPS Receivers
The 58503B GPS Time and Frequency Reference
Receiver
The 58503B GPS Time and Frequency Reference Receiver provides
highly accurate time and frequency outputs that can be used as a
“house standard” to meet manufacturing, calibration, and development
needs. The Receiver can also be used for synchronizing wireless base
stations.
The Receiver provides highly accurate timing. If a satellite signal is
lost, the Receiver automatically switches to holdover mode, which
ensures system synchronization for up to 24 hours with reduced
accuracy.
The standard 58503B has the following Input/Output connectors:
• an RS-232C serial communication port (25-pin female rectangular
D subminiature on the rear panel)
• a 1 PPS output BNC
• an optional 1 PP2S output BNC (see page x and page 1-3)
• an Alarm output BNC
• 10 MHz output BNC
• an Antenna N-type connector
• Power input jack
The front panel contains four Light-Emitting-Diode (LED) indicators to
indicate that power has been applied (
Power
), the module has tracked
and locked on to one or more GPS satellites ( GPS Lock ), the GPS
system is operating in holdover mode (
Holdover
), and an error or
invalid condition exists due to system fault or reduced accuracy of the
outputs (
Alarm
).
The standard 58503B has no front panel display or keypad entry.
Information is remotely entered into and retrieved from the 58503B
using a personal computer connected to the rear-panel 25-pin RS-232
port.