22
208528 REV M
Operations Manual, 7RU SSPA Chassis
2.2.7.1 Hardware Mute (TX Enable)
There are three ways to mute the amplifier via hardware input:
1. A 50 ms closure to ground on Port J7, Pin 17 toggles between Mute/Unmute states.
2. Press the
Main Menu
key on the front panel, then select
4.Fault Setup
and press
the
Enter
key; select
2.Auxiliary Faults
and press the
Enter
key; select
1.Action
and press the
Enter
key; select
4.Alert+Mute
and press the
Enter
key. Then select
4.Fault Setup
and press the
Enter
key; select
2.Auxiliary Faults
and press the
Enter
key; select
2.Fault Logic
and press the
Enter
key; select
2.Fault on Low
and press the
Enter
key. A continuous closure to ground on Port J7, Pin 18 will
then mute the amplifier. See
Section 3.4.2
.
3. Press the
Main Menu
key on the front panel, select
4.Fault Setup
and press the
Enter
key; select
2.Auxiliary Faults
and press the
Enter
key; select
1.Action
and
press the
Enter
key; select
4.Alert+Mute
and press the
Enter
key. Select
4.Fault
Setup
and press the
Enter
key; select
2.Auxiliary Faults
and press the
Enter
key;
select
2.Fault Logic
and press the
Enter
key; select
2.Fault on High
. A continu-
ous open to ground on Port J7, Pin 18 will mute the amplifier. See
Section 3.4.2
.
2.2.8 Link Port (J8) [DB9(F)]
The 9-pin male connector J8 Link Port is used to link a SSPA with other units in a redundant
system in order to pass online/standby status information between them. Leave unconnected
unless specified otherwise.
Table 2-3: Parallel connector (37 socket D connector)
Pin #
Function / Description
12
Low Forward RF Fault Common
16
Auto/Manual toggle input. 50mS Closure to isolated ground to activate
17
Mute/Unmute toggle input. 50mS Closure to isolated ground to activate
18
Auxiliary Fault input. 50 ms minimum response time
35
HPA Standby input. 50mS Closure to isolated ground to activate
36
Local/Remote toggle. 50mS Closure to isolated ground to activate
37
Fault clear. 50mS Closure to isolated ground to activate
19
Isolated Signal Ground
15
+5V Isolated Power 20 mA
13, 32
+28V Auxiliary Power 1A
14, 33
Chassis Ground
Summary of Contents for 7 RU Chassis
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