FM TRANSMITTER
TR EM 1000 HE DIG PLUS COMPACT
Technical Manual 1v2 November 2019 47
of the deviation, the value of the modulating signal will be indicated in dB, against the
nominal value set.
4) Ensure that the deviation measured does not exceed local regulations, then press the knob
to confirm the setting.
5) Using the knob, select OK to save the settings, EDIT to make further changes, or ABORT to
exit without saving the new settings, then press to confirm
- LIMITER setting
Used to limit the peak modulation at a maximum value.
The display shows the following:
• Limiter – followed by OFF if deactivated, or by a value expressed in dB, in reference to a
deviation of 75KHz (0dB = 75KHz)
• Mpx – measurement of the current peak deviation value, expressed in KHz (in the example,
0.0 KHz) in dB, in reference to a deviation of 75KHz (0dB = 75KHz)
In addition, the bar indicator graphically shows the current peak deviation value.
By changing the Limiter, you can set a maximum modulation value beyond which the limiter
will activate.
When the limiter begins to intervene, the modulation distortion increases. As such, the
modulation sensitivity should be adjusted so the limiter intervenes sporadically. Using this
approach, its operation is generally imperceptible.
- MODE setting
Used to define whether the transmitter operates in mono or stereo, and its pre-emphasis
value.
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