NEC PASOLINK Training Course page 63

FUNCTIONAL OPERATION
INITIATING
MODULE
RF CKT
2-4
4 pages
The setting of the radio frequency and TX output power are performed
from the IDU using personal computer. The TX output power can be
controlled by a control command signal (T PWR CTRL) from the IDU.
To communicate with the opposite station or with the IDU using
orderwire, an optional OW/RX LEV monitor unit is necessary, the HEAD
SET jack is provided on the OW/RX LEV Monitor. Therefore, connect the
OW/RX LEV Monitor to the RX LEV MON jack on the ODU.
Table 2-1 Alarm Indication and Reporting
ALARM CONDITION
IF input signal from IDU lost
Transmit RF power decreases 3 dB
from nominal
APC loop of TX local oscillator or
first local oscillator for RX unlocks
APC loop of second local oscillator
for RX unlocks
Receiver input level decreases by
preset value from squelch level
Communication between IDU and
ODU is lost
Note: (*) 1 or 2 for channel No. in 1+1 system.
ROI-S04605
ALARM
INITIATED
IF INPUT ALM (*)
TX PWR ALM (*)
APC 1 ALM (*)
APC 2 ALM (*)
RX LEV ALM (*)
OPERATION ALM (*)