Service manual

13
XL422 Comms Pod.
1. The METERS monitor the peak signal levels of the stereo AFL left and right solo busses or the
PFL bus and local output level. The change over is automatic as part of the PFL MONITOR
switch on the COMMS module.
XL431 Comms Module.
1. The CALL switch and indicator has two functions:-
i. It illuminates when an incoming clearcom call is expected.
ii. It fires a DC pulse when pressed to signal clearcom devices (by illuminating their call
lamps) that an outgoing call is to be made.
2. The OSC switch connects the oscillator to the talk system.
3. The EXTERNAL ON switch connects the external talk input and output to the talk system.
4. The PINK noise switch connects pink noise to the talk system.
5. The FREQ control gives continuous adjustment of the oscillator frequency from 100Hz to
10K.
6. The talk LEVEL control gives continuous adjustment of all the talk inputs except the talk mic
and has a range from + 6dB to off.
7. The TALK TO AUXES switch sends the talk system signals to ALL the aux busses.
8. The TALK TO GROUPS switch sends the talk system signals to any group buss which has its
GROUP module TALK switch active.
9. The TALK TO MATRIX switch sends the talk system signals to any matrix buss which has its
MATRIX module TALK switch active.
10. The TALK TO MONO switch sends the talk system signals to the mono master bus.
11. The TALK TO LEFT switch sends the talk system signals to the left master bus.
12. The TALK TO RIGHT switch sends the talk system signals to the right master bus.
13. The COMMS ON switch sends the comms headset mic amplifier signal to the comms output /
input connector.
14. The LINK switch connects the talk system into the comms system so that talk mic, head-
phones and local output can send and receive (respectively) clearcom signals as well as the
headset.
15. The COMMS control gives continuous adjustment of the clearcom signal levels sent to the
headset, headphones and local output. The level adjustment is from + 6dB to off.