6.2.3 Transmitter with an external audio processor and RDS (inline connection)
1. Place the transmitter in a well ventilated space.
2. Connect the antenna to the RF output connector on the back of the transmitter.
3. Connect the MPX output of your audio processor (or stereo generator) to the
MPX input of your RDS encoder.
4. Connect the MPX output of your RDS encoder to the MPX 1 input on the back of
the transmitter.
5. Plug the power cord into the power supply module on the rear panel of the
transmitter.
6. Connect the required remote control / monitoring ports (Ethernet, RS232,
Alarms/Triggers Port).
7. In the RF Settings menu, set MPX Source to MPX Input 1.
8. Once the transmitter is operating, set the correct carrier frequency and power
from the RF settings menu. Check reflected power is OK.
9. Check the modulation level - if the modulation level is low, adjust the MPX output
level on your audio processor (or stereo generator), RDS encoder. The maximum
modulation should not exceed 75kHz.
10. Check the documentation that came with your audio processor on how to
set/check the proper pilot injection level.
11. Check the documentation that came with your RDS encoder on how to
set/check the proper RDS injection level.
In this setup, the stereo multiplex is generated in the audio processor, it is then fed
through the RDS encoder where the RDS subcarrier is added. It is then fed directly into
the transmitter’s exciter. Note that the transmitter’s onboard processing will have no
effect on the signal in this configuration.
Also note that the V3 transmitter includes an on-board RDS encoder – so unless you have
requirements particular to your existing RDS coder, you do not have to use an external
unit to achieve RDS/RBDS.
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