User's Manual

G3L-1929- Installation and Service Manual
4. Measure primary DC input voltage. DC input voltage should be +27 Vdc ±1.0 Vdc. If the DC
input voltage is above or below the limits, call and consult Powerwave before you turn on
your amplifier system.
5. Refer to section 3 for initial turn-on and checkout procedures.
Power switch positions:
Off/On/Reset (momentary)
Front
Figure 2-1 G3L-1929-120 Power Switch Functions
2-7 Amplifier Module Power, Alarm, Control, and RF Connector
The power, alarm, control, and RF connections on the amplifier are made through a 21WA4 male
connector, located on the rear of the amplifier, and are listed and described in table 2-1 below.
Table 2-1 G3L-1929-120 MCPA Alarms & Controls
Items Specifications Remarks
Alarms & Controls TTL Level; +5 Volts
Buffer: 74ABT244 (5 V) - recommended
Deletion Alarm When unit does not exist (HEAR_PAU)
Equipped: GND Deletion OPEN
D-Line
Function Fail Alarm When unit does not exist (HEAR_PAU)
Normal: High Abnormal GND
D-Line
VSWR Alarm
3:1 (6 dB ± 1dB) @ 35 dBm-48 dBm Output Power. PAU
remains normal operation when this alarm condition disap-
pears (NOT shutdown)
RS-485
High Temp. Alarm This alarm only at +75 ºC +5 ºC
/
/-0 ºC (heat-sink temp.) RS-485
Over Power Output
Alarm
Output power is greater than +48.5 dBm ±0.5 dB (70.8 W).
MCPA recovers when the alarm condition disappears.
(NOT shutdown).
RS-485
DC Fail Alarm
+20.5 Vdc ± 0.5V or +29 Vdc ± 0.5V. When this alarm oc-
curs the MCPA shuts down
RS-485
Loop Fail Alarm When an alarm occurs on the feed forward path. RS-485
EN/DISABLE Reserved RS-485
 Copyright Powerwave Technologies, Inc., May 2003. All rights reserved
044-05138 Rev A 2-3 May 2003