SIELCO srl
- Via Toscana, 57/59 - 20090 BUCCINASCO (Mi) - ITALY - tel. 02 - 45713300 - www.sielco.org
EXC/RTX19 - USER & MAINTENANCE MANUAL - rev.1.5 - 05/16
Page 40
MUTING SETUP
level:-75dBm / OFF
DEEMPHASIS TIME CST.
50 us
DEEMPHASIS ON/OFF
MONO:on STEREO:on
LF out lev. + 2.5dBm
Nom. level: + 6.0dBm
Field #23: LF Output level setup
It is here possible to vary at the same time the level of the main LF outputs, either the Multiplex
(Mpx) and Mono signals. In the first row it is shown the actual level in dBm, while in the bottom
row it is shown and may be preset the nominal output level referred to 75kHz deviation. Preset
range is comprised in
-1.5 and +12dBm.
Field #24: Useful Received Field and Muting setup
From this field the user may vary the insertion level of the muting circuit and its intervention.
Suitable levels are -70 to -80dBm for stereo signals and -85 to -90dBm for mono signals, depending
on the received signal strength. The muting level is unrelated to the field alarm level which may
be differently preset by its own menu (see alarm setup, menu #32)
By pre-setting "ON" or "OFF", the muting circuit may be enabled or disabled either by
"mistuning alarm" or remote control function.
Fields #25 & #26: De-emphasis setup
It is here possible to vary the de-emphasis time-constant between
0, 25, 50 and 75µs.
The de-
emphasis function may be separately preset on the mono and the decoded stereo outputs, if present.