18
6.0
INITIAL START-UP
In-service operation of the P20 Redundant Transceiver Chassis as a
Redundant Station is completely automatic. Once the unit has been
properly installed and configured, operator actions are limited to
observing the LED status indicators for proper operation.
If all parameters are correctly set, operation of the Redundant Station
can be started by following these steps:
1. Apply primary power.
2. Select the active transceiver by setting the front panel
RADIO SELEC-
TION
switch to
A
,
B
or
AUTO
. (See Table 2 for an explanation of the
switch positions.)
Invisible place holder
Figure 14. Redundant Transceiver Chassis
radio selection switch
Invisible place holder
3. On the rear panel, observe the transceiver LED status panel(s) for
the proper indications. The LEDs can be seen through the Redun-
dant Transceiver Chassis’s viewing slots (Figure 15). Figure 16 and
Table 3 describe the LED appearance for spread spectrum transceiv-
Table 2. P20 radio selection switch positions
Switch Position
Function
A
Transceiver A is selected as the active unit. Switchover will not
occur if a failure occurs in Transceiver A or if the Remote
Switchover Input (Interface connector Pin 24) is toggled.
AUTO
The most recently selected transceiver is active. If a failure
occurs with that side, switchover automatically occurs to the
other transceiver.
Also, when the switch is in this position, the Remote Switchover
Input (Interface connector Pin 24) can be toggled to switch
transceiver.
B
Transceiver B is selected as the active unit. Switchover will not
occur if a failure occurs in Transceiver B or if the Remote
Switchover Input (Interface connector Pin 24) is toggled.
Summary of Contents for P20
Page 1: ...Installation and Operation Guide Redundant Transceiver Chassis WDS P20...
Page 29: ...NOTES...
Page 30: ...NOTES...
Page 32: ......
