5. AF MON BNC connector for monitoring of the input to the
modulator (baseband MPX spectrum).
6. RF MON BNC connector for monitoring of the RF output. Output
level will be the RF output level attenuated by approximately 40dB. Not
to be used for measurement of harmonics.
7. RF OUT 'N' Socket. Connect a matched, pre-tested antenna system
with a return loss of >14dB to this socket. Ensure all parts of the feeder
and antenna system are rated for 300W or above.
8. RF ADJ Use a suitable trimmer tool to adjust the RF output power
level, (RF FWD on the display). Never set to above the 250W maximum
rated output power.
9. AUDIO IN (LEFT) XLR Socket. Connect a +8dB 600ohm balanced
audio feed to this socket.
10. AUDIO IN (RIGHT) XLR Socket. Connect a +8dB 600ohm balanced
audio feed to this socket.
11. REMOTE 9-pin D-sub Female. Remote control and monitor inputs
and outputs are available on this connector:
Pin 1. Reflected Power Alarm. TTL logic low during normal
operation. Floats high to indicate a high level of reflected power
(critical antenna mis-match) has been detected.
Pin 2. Forward Power alarm. TTL logic low during normal
operation. Floats high to indicate RF output has failed.
Pin 3. Audio failure alarm. TTL logic low during normal operation.
Floats high to indicate more than one minute (approx) of no
signal detected on the XLR audio inputs.
Pin 4. Temperature alarm. TTL logic low during normal
operation. Floats high to indicate over-temperature condition
has occurred.
Pin 5. RDS TA Control. Supplying between 5 and 12V this pin to
(with reference to chassis ground potential) will activate the RDS
TA (Traffic Announcement). Primarily used in automated
changeover systems. (Option at time of ordering)
