FM Transmitter
Sistemas Electrónicos S.A EM 100 DIG
Technical Manual - v1.2 - November 2005 25
MENU #00:DEFAULT MESSAGE.
OMB EM-100 DIG
VER 1.0
This screen shows the default message and the software release.It is the field that will be initially set, or
to which it will return back after repeated CANCEL commands.
If authorized by the 3rd level permission, going in the command mode (inputting <OK>) will permit
to edit the first row of this field with a custom message e.g.your organization name.
MENU # 01:DIRECT &REFLECTED POWER.
dir. power ; 100 W
REF. POWER: 0.0 W
This screen shows the direct and reflected power actually delivered.Going in the command mode,
with the 2nd level password authorization, will permit to set a new direct RF output power. See menu
# 21.
MENU # 02:MULTIPLEX SIGNAL LEVEL (OUTPUT MODULATION)
MPX 75KHz +7.1 DB
ŰŰŰŰŰŰŰŰŰŰŰŰ
This screen shows the actual peak modulation in dB referred to 75kHz and as deviation in kHz. A
pseudo-analog moving bar simultaneously fast changes with the modulation, leaving a peak mark
at its end for 1 or 2 seconds. A vertical bar ( | ) on this line marks the 0dB position.
Command mode, with the 2
nd
level password authorization, permits to set LF input channel sensitivity,
or modulation depth. See Menu # 22.
Right key,with the 3rd level password authorization,permits to access to limiter setup and
threshold.See Menu # 32.
MENU # 03:LEFT &RIGHT SIGNAL LEVEL IN DB
LEFT level -3.0 db
right level -4.0 db
This screen shows the actual left and right peak modulation in dB referred to 75kHz.The reading is
adequately accurate with real audio signals. Some steady state test tone especially at very low
audio frequency may beat with the discrete A/D conversion sometimes producing some reading
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