Symmetricom 58503B, Руководство по началу работы

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Chapter 2 Features and Functions
Outputs
2-8 Getting Started Guide
The resolution and time tagging features of the Receiver make it
ideally suited to applications such as phasor measurement, state
estimation, stability protection, and adaptive relaying.
Outputs
1 PPS (One-Pulse-Per-Second) Output
The Receiver outputs this highly accurate 1 PPS time standard output
for user-specific synchronization applications.
In the GPS locked mode, the Receiver outputs a 1 PPS signal derived
from the internal oscillator, which is locked and traceable back to
Coordinated Universal Time (UTC) as determined by GPS. In the
absence of GPS, the 1 PPS signal will continue to exist, but the
oscillator will go into a holdover mode in which the SmartClock

algorithm will compensate for the instabilities in the oscillator. In the
holdover mode, the timing 1 PPS accuracy will degrade as the holdover
time increases.
1 PP2S (One-Pulse-Per-Two-Seconds) Option 002
Output (58503B Only)
This optional output provides one pulse every other second,
synchronzed to the even seconds in GPS time. This is the reference
time used in CDMA base stations. GPS even-second pulses from the
1 PP2S option are used to synchronize the models 8921A options 600
and 601, and 6380 Cellular Base Station Test Sets. Synchronizing the
test set from an independent source permits remote base station
testing and independent base station frequency and time reference
accuracy checks.
Programmable Pulse Output (59551A Only)
This programmable pulse capability allows you to program the
Receiver to output a pulse at a specific time, or a repetitive signal with
a period from 1 second to 1 year.
IRIG-B Output (59551A Only)
The IRIG-B123 formatted time code signal may be used for general
purpose time distribution, and magnetic tape annotation applications
requiring time of year.