D*AP8
81
Current Measurement
[1L/1R, 2L/2R, 3L/3R and 4L/4R]
MPX Power 60s (dBr)
current MPX power
Pre-Emphasis Limiter (%)
bar graph to show the percentage of high frequency filtering applied
True Peak Limiter
bar graph (duplicates the GUI top display)
Gain Reduction (dB)
Reset Max
<reset max>
soft button
resets Duration, MPX Power (60s) Max and
Gain Reduction Max
Duration
elapsed time since
<reset max>
was depressed
MPX Power 60s Max (dBr)
current maximum MPX power
Gain Reduction Max (dB)
current maximum gain reduction
Recent Measurement
Duration
elapsed time of recent measurement since
<reset max>
was
previously depressed
MPX Power 60s Max (dBr)
maximum MPX power value detected
Gain Reduction Max (dB)
maximum gain reduction applied by the MPX limiter
In the next section the operator can set the audio relevant parameters of the FM conditioning process:
FM Conditioner
[ON / OFF]
Setup Gain (dB)
[-4.0 … 0.0 … 10.0]
can be used to adapt loudness processed signals to MPX criteria or
level matching
Pre-Emphasis
[0.0 … 2.0 … 15.0]
Headroom (dB)
MPX Limiter Profile
[Soft / Mid / Hard]
True Peak Limiter
[0 / 1 Live / 2 Speech /
Profile
3 Pop / 4 Uni / 5 / 6 Classic /
7 / 8 / 9]
True Peak Max (dBTP)
[read only]
The expert mode allows the administrator to set up the parameters of the transmitter and to turn
the
MPX Limiter
on or off.
Expert
[ON / OFF]
Pre-Emphasis
[OFF / 50µs / 75µs]
Operating Level (dBFS)
[-15.0 … -9.0 … -6.0]
Peak Deviation Target (kHz)
[35.0 … 75.0 … 80.0]
Pilot Deviation (kHz)
[0.0 … 6.0 … 15.0]
RDS Deviation (kHz)
[0.0 … 2.0 … 4.0]
SCA Deviation (kHz)
[0.0 … 15.0]
Resulting Ceiling (dBFS)
calculated from the operating level, the sub-carrier (pilot-tone) and the
respective RDS and SCA deviation
MPX Limiter
[OFF / ON]
Reference (dBr)
[-4.0 … 0.0 … 4.0]
Low Pass Filter (15kHz)
[OFF / ON]
