TM 5-6350-264-14&P-12
NAVELEX EE 181-AA-OMI-120/E121 C-7359-60-1
TO 31S9-2FSS9-1-12
OPERATING INSTRUCTIONS
Section L OPERATING PROCEDURES
This section is not applicable.
down of the Transmitter and Receiver are depen-
2-1. NORMAL OPERATING PROCEDURES. The
dent on the presence or absence of power from
Transmitter and Receiver are operational after they
the Control Unit and Monitor Cabinet respectively,
have been installed, tested, and connected in the
no operating procedures are required.
J-SIIDS configuration. Since the startup and shut-
Section IL THEORY OF OPERATION
long or over leased, dedicated, voice-grade tele-
2-2. FUNCTIONAL DESCRIPTION. The Data
phone lines. The one-zone, five-zone and twenty-
Transmitter and Receiver provide secure transmis-
five-zone Monitor Cabinets are functionally iden-
sion and line supervision between the J-SIIDS
tical.
Control Unit and Monitor Cabinet. The Trans-
mitter monitors the status of the Control Unit
2-3. EMERGENCY OPERATION. Extended peri-
and sends status information to the Receiver by
o d s of operation on battery (stand-by) power
means of a 12-bit word stream. The Receiver
should be avoided.
decodes the status information and provides input
to the Status Monitor Module which displays the
2-4. UNUSUAL OPERATING CONDITIONS.
secure or alarm condition at the front panel of the
Loss of synchronization between Data Transmitter
J-SIIDS Monitor Cabinet. Figure 2-1 is a simplified
and Data Receiver may occur while operating dur-
block diagram. The method of transmission is over
ing periods of heavy thunderstorms.
a balanced, 2-wire transmission line up to 10 miles
