User manual

SETUP OF MPX OUTPUT (FM version only) ENG
Page 49
25 SETUP OF MPX OUTPUT (FM version only)
25.1 MPX OUTPUT LEVEL*
The MPX signal (+ any internally or externally generated RDS signal or SCA signal) is available on the Bnc MPX OUT
connector. * the MPX module is available as an option
The MPX output may be tuned using the small trimmer located next to the output
BNC. In order to best adjust the output level, we recommend enabling a pilot tone
(see
paragraph 27), which identifies the maximum peak which match the deviation of 75
KHz.
The Peak Tone is a 400-Hz reference tone that identifies the peak value of the mpx signal, which must match the
maximum frequency deviation of 75KHz. In other words, the peak tone identifies an audio level
that will never be
exceeded during normal processor operation.
To enable / disable the Peak Reference Tone
:
DEFAULT SCREEN
OUTPUT CALIBRATION menu
OUTPUT MODE menu
PEAK REFERENCE TONE / NORMAL MODE
pre-emphasis on the MPX output can never be turned off. You must therefore cut out any pre-
emphasis from transmitters or transfer links.
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 0dBu.