Installation Instructions
The diagram below shows the typical installation IRIG system which
utilizes the IRGM-1504 and IRGP-1501 for IRIG distribution.
Typical Fiber Optic IRIG System
Fiber Optic Cable
IRGP-1501
IRGM-1504
Master
IRIG
Source
(50
O )
IRGR-1501
IRIG
Output
IRIG Output
IRIG
Output
IRGR-1501
Fiber
Optic Cable
Fiber
Optic Cable
In the above diagram only two optical outputs of the IRGM-1504 are
utilized. The IRGM-1504 however provided four optical outputs
Adjustment of the IRGP-1501
The IRGP-1501 IRIG repeater has a fiber optic receiver that can be
adjusted to compensate for the unique fiber losses of your
installation. The range of the receiver level control is adequate to
allow the full 0 - 13dB optical path loss range to be accommodated. .
When using the IRGP-1501 in a daisy chained linear distribution
system the front panel receiver Level adjustment must be set for a
three volt peak to peak IRIG output so that the internal optical
transmitter will send the proper level signal to the next IRGP-1501
repeater in line. If this is not done to each of the IRGP-1501 units in
line the signal may be distorted as the number of units is increased.
124968 Rev E
Power Terminal Block Connections
Pin Function
1
Alarm output for use with optional Alarm Sensing Unit
ALM-1000.
No other connections should be made to
this terminal
2
+11 to 24 DC or AC Volts input
3
AC or DC return (Common to Housing)
Be certain to check all connections, settings and voltages before
applying power
Indicator Lights
Indicator Lights
when
Pwr
Proper power is present.
Alrm
The loss of signal alarm is activated and there is
no IRIG signal present to transmit.
Rx
A data signal is being received.
Tx
A data signal is being retransmitted
The
Alarm
switch is used to turn the alarm function ON and OFF.