the true square wave period comes to:
Period + (numerator/denominator)] * 5 ns
5.2.3.7 Simulcast (CTCSS/Data Clock) [1204-14]
The Simulcast CTCSS/Data Sync/Data Clock Option Card provides CTCSS, data clock, and
alarm outputs through relays for the SecureSync platform through one DB-9 and one RJ-12 con-
nector. The maximum number of cards installed is six (6).
a.
Connector: DB-9
Outputs:
(3) RS-485 Outputs (Data Clocks, CTCSS frequencies, 1PPS)
(1) Alarm
Voltage:
Alarms: GND normally, high impedance when Alarm
b.
Connector: RJ-12
Outputs:
(1) RS-485 Outputs (Data Clocks, CTCSS frequencies, 1PPS)
(2) Alarm
Voltage:
Alarms: 5V pulled up through 10kΩ normally, GND when Alarm
Note: By factory default, all CTCSS outputs are DISABLED.
Figure 5-31: Model 1204-14 option card rear plate
396 SecureSync User Reference Guide
APPENDIX
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