Olson Technology 7-OR - Manual (Page 8)

Figure 3 - Location of Laser RF Drive Test Point and RF Drive Level Adjustment Control
025-371546 Rev X1 Page 8
Programming the 7-OR-RT to Support Automatic Shutdown
The 7-OR-RT return transmitter supports Automatic Shutdown feature, which halts the transmission of light through
severed or improperly mated fiber optic cables You can program the 7-OR-RT to operate in either the ALERT ON or
ALERT OFF mode.
In the ALERT ON mode, the 7-OR-RT transmits a return signal over the return fiber as long as the 7-OR optical
receiver remains powered and the forward light signal entering the receiver is above a certain pre-set or alert level. If
the 7-OR loses power or the forward light signal falls below the pre-set level, the return transmitter will stop transmitting
optical signal to the return receiver at the head-end. If the return receiver supports Automatic Shutdown, it will sense
the disappearance of light and shutdown the forward transmitter.
In the ALERT OFF mode, the return transmitter will operate as long as the 7-OR module remains powered. It will not
trigger Automatic Shutdown it the level of the forward optical signal decreases.
1. Find JP2 shown in Figure 4. The 7-OR-RT module is shipped with the ALERT ON mode.
2. To enable the Automatic Shutdown feature, leave the jumper as shown in Figure 4a. This is the ALERT ON
condition.
3. To disable the Automatic Shutdown feature, move the jumper as shown in Figure 4b. This is the ALERT OFF
condition.