Solidyne 542 APC, Руководство пользователя

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LEVEL: The signal must remain below this threshold to be
considered fall.
FAIL TIME: The time that the signal must remain below
the threshold to be considered fall.
3.5.5 Pre-filtering
HI PASS: It is a high pass filter Chebyshev type. The cut-
off frequency can be changed between 0 (off) 20 Hz (de-
fault); 40 Hz; 60 Hz and 80 Hz.The purpose of the filter is
to cut subsonic audio signals, since they do not contrib-
ute anything to the music when it falls into a zone of al-
most no auditory sensitivity. However, they have a perni-
cious effect that produces an unpleasant sensation: the
saturation of the amplifiers and the speakers (by exces-
sive excursion of the cone). Values higher than 40 Hz
suppress audible low signals.
LOW PASS: Hi cut filter applied to the audio band. The
cut frequency can be 15 Khz; 16KHz or 20KHz. The option
NONE disables the filter.
3.6 AUDIO OUTPUTS
To access click on the op-
tion AUDIO OUTPUT in the
left menu .
The 542APC hardware has four audio outputs with indepen-
dent level and d-emphasis compensation.
1. XLR analog output
2. RJ45 analog output
3. AES-3 digital output
4. Streaming over Ethernet (optional in AoIP models)
Figure 18: Outputs
3.7 FM output – MPX
542 APC includes the stereo coder and the RDS encoder.
Clicking on FM OUTPUT
(MPX) the user access to
the configuration options
for MPX outputs , the basic parameters of RDS and the ITU
BS412 control.
3.7.1 MPX LEVEL
Figure 19: MPX Level
The two FM baseband (MPX) outputs have peak-to-peak
(Vpp) calibrated level control. The MPX level will be ad-
justed to obtain 100% modulation at the transmitter.
If the transmitter has MPX input gain, adjust the MPX
value on the processor to 5 Vpp and use the transmitter
input gain for fine tuning.
3.7.2 Calibrator – Modulation index
Figura 20: Calibrador
542APC generates a calibration tone useful to set the
modulation index. For details, please see 3.8 - Set the
modulation index .
Figure 21: Calibrator
3.7.3 PRE-EMPHASIS
Adjusts the pre-emphasis curve according to the corre-
sponding standard in each country (Europe = 50uS; USA,
ASIA, Latin America = 75uS).
3.7.4 Pilot Tone and RDS
Figure 22: Pilote Tone and RDS
Figure 23: Advanced settings
Audio Processing Core - SOLIDYNE 542 APC Page 21