Spectracom 8194B, Инструкция по эксплуатации

Страница: 19 / 136

Spectracom Corporation 8194B, 8195B, 8197B
GPS Ageless Master Oscillator Instruction Manual 1-9
Optional Outputs: Option 06, 12.8 MHz outputs, changes the 2048 kHz output
on this connector to 1600 kHz
1.6.8 Data Clock Timing Outputs
Signals: 1PPS, 9.6 kHz, 18.0 kHz, derived from the 10 MHz GPS
disciplined oscillator
Connector:
DB9 female, rear panel
Signal
Level: RS-485
Duty Cycle:
1PPS: 20% ±5%
9.6 kHz, 18.0 kHz: 50% ±2%
Accuracy:
The Data Clock 1PPS is made leading edge synchronized to
the recovered GPS 1PPS. Using the 1PPS offset command,
1PO, the Data Clock 1PPS output can be offset from 0 to 1
second in 0.1 microsecond steps. The Data Clock 1PPS
shall be synchronized within ±500 nanoseconds of other
Master Oscillator receivers having the same 1PO offset.
The 9.6 kHz output is leading edge synchronized to within
±150 nanoseconds of the Data Clock 1PPS output. The 18
kHz output is not leading edge synchronized.
Alarm Outputs:
Major alarm status is provided on this connector. Under
normal operation, the alarm pin is ground and high
impedance when a Major Alarm is asserted.
Optional Outputs:
Option 17, CTCSS Outputs, replaces the 9.6 kHz and 1 PPS
signals on the Data Clock (DB9) connector with CTCSS#3
and CTCSS #4 respectively.
1.6.9 Data Sync Timing Outputs
Signals: 17 2/3 Hz, 33 1/3 Hz, 18 kHz, 64 kHz, derived from the 10
MHz GPS disciplined oscillator
Connector:
DB15 Female, rear panel
Signal
Level: RS-485
Duty Cycle:
18 kHz, 64 kHz: 50% ± 2%
17 2/3: 888 microsecond pulse width
33 1/3: 208 microsecond pulse width