Falcon 15 manual In & Out Settings Fm Version, Setting The Preemphasis, Mono - Stereo Operation

IN & OUT SETTINGS (FM VERSION) ENG

12.3HOW TO CONFIGURE THE MPX OUTPUT (MPX MODULE SETUP)

12.3.1 SETTING THE PREEMPHASIS

The Mpx Module Setup / Preemphasis menu toggles between 50uS and 75uS of preemphasis applied to the Falcon 15’s MPX output.

European countries use a 50 uSec preemphasis, while US countries use a 75 uSec preemphasis.

NOTE: FALCON 15 PREEMPHASIS REMAINS ACTIVE AT ALL TIMES AND CAN NOT BE REMOVED FROM THE MPX OUTPUT

Only one pre-emphasis must be kept active in a transmitting chain. Turn always off the pre-emphasis generated by transmitters.

NOTE: MAKE SURE YOU HAVE PREEMPHASIS SET TO THE APPROPRIATE VALUE FOR YOUR APPLICATION BEFORE CALIBRATION AS THIS WILL AFFECT THE OUTPUT LEVEL

12.3.2 MONO - STEREO OPERATION

The MPX Module Setup / Mpx Mode menu selects the mono versus stereo operation of the composite output. With Mono audio modes enabled, Pilot tone is automatically turned off.

In particular:

Selecting Mono (Left) will remove the L-R portion of the composite signal and simply output the left audio input. The Pilot will be turned off.

Selecting Mono (Left+Right) will remove the L-R portion of the composite signal and simply output the sum of the left and right audio inputs. The Pilot will be turned off.

12.3.3 ADJUSTING THE MPX OUTPUT LEVEL

The MPX signal (+ any internally or externally generated RDS signal) is available on the Bnc MPX OUT connector.

We recommend connecting the processor output directly to the transmitter or radio link, without inserting any other equipment. The factory preset for the overall MPX signal is 0 dBm.

Where necessary, this output may be tuned using the Mpx Module Setup / Output Level menu.

In order to best adjust the output level, we recommend enabling a pilot tone, which identifies the maximum peak which should match the deviation of 75 KHz. To do this:

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