User Manual
MCA9129-90-A Installation & Service Manual
Ó Copyright Powerwave Technologies, Inc., July 2001. All rights reserved
044-05060 Rev. C 2-4 July 2001November 2002
2-7 Multifunction Connector
The status, alarm, control, and power connections on the amplifier connectors are made through
a 21-pin D-Sub male combo connector and supplemental single-pin male D-Sub connector (figure
2-1) and are listed and described in table 2-3.
Figure 2-1 Amplifier Connectors (on Rear of MCA9129-90MCA9129-90-A Module)
Table 2-3 Amplifier Module Status, Alarm, Control, and Power Connections
Pin Function Description
21-Pin D-Sub Male Combo
A1 RF Input Coaxial Contact
A2 Power Input +27 Vdc (Power Contact)
A3 Ground Ground (Power Contact)
A4 RF Output Coaxial Contact
1 Ground Ground
2 RS 485 +RxD Serial Communication Data In
3
RS 485 -RxD
Serial Communication Data In
4 RS 485 +TxD Serial Communication Data Out
5
RS 485 -TxD
Serial Communication Data Out
6NA
7NA
8 Fan Fail TTL signal normally low. A high indicates one or bothof the fans have
failed
9 Forward Power Monitor An analog DC signal representing the RF output power of the MCA. The
voltage is 4 volts ± 100 mV at the maximum rated output power.
10 NA
11 Average Power Input An analog DC voltage representing the average detected power of all
the MCAs in a subrack. This voltage is derived from dividing the sum of
all the forward power voltages in a subrack by the number of enabled
MCAs. This voltage is used by the MCA to determine a low power fault.
12 Address A0 Amp Address A0; Ground for high, float for low
13 Summary Fault TTL signal normally low. A high level indicates that the MCA has been
disabled by a recurring alarm fault.
14 Address A1 Amp Address A1; Ground for high, float for low
15 Module Detect Ground potential. Informs the subrack that an MCA is plugged in.
16
Bias InputNA TTL signal normally low for an enabled MCPA. A high level will
disable the MCPA.
17 FP Disable Output TTL signal, low if the front panel switch is in the ON position. A high
level indicates the front panel switch in the OFF position.
Single-Pin D-Sub Male
1 Power Input +27 Vdc (Power Contact)