Odetics
Telecom
GPStar
plus
Model 365
365-8006
Specifications 2 - 15
2.7.5
Time Tag Input
This input provides the capability to time tag an event input signal generated by
equipment such as: Sequence of Events Recorders, Fault Analyzers, and Phasor
Measurement Units (PMU's). The outputs of these devices are typically TTL pulses. An
event is time tagged at the time the rising edge of the input pulse exceeds the threshold
level. The logged time tag data can be observed on the unit's front panel display, or
retrieved through the RS-232 control interface port.
Connector Identification................................................................... TAG IN
Number of Inputs ....................................................................................... 1
Connector Type ........................................................................ BNC female
Input Voltage Range
Normal ..................................................................- 0.5 Vdc to + 5.0 Vdc
Maximum ................................................................- 20 Vdc to + 25 Vdc
Input Impedance ................................. .10k
Ω
(Normal input voltage range)
1k
Ω
(Input voltage > normal range)
Trigger Edge ...................................................................................... Rising
Threshold Level .................................................................+ 1.7, +/- 0.4Vdc
Hysteresis ............................................................................1.0, +/- 0.5 Vdc
Input Pulse Width ............................................................. 100 ns minimum,
positive to negative edge
Resolution......................................................................................... 100 ns
Accuracy ................................................Same as Reference 1 PPS Output
Buffer Size ............................................................................................. 256
Modes ........................................................Single-Burst up to buffer size or
Wrap-Around, user selected
Time Tag Rate ................................................................ 500/sec maximum
Dwell Time between Events.................................................. 2 ms minimum
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