Multiband FM processor met HF limiter/cl
The Warsanis 1401FM-M2: A 4 band Audio Processing system for FM Radio Broadcast.
The Warsanis 1401FM-M2 has been developed to process audio signals
as naturally as possible. You can adjust the Warsanis 1401FM-M2 for
every market no matter how competitive it is. You can vary your sound
between 'unprocessed' and heavily processed. Regardless the amount of
processing, your station's sound will always be loud, open and clear.
When desirable, the Warsanis1401FM-M2 can be adjusted to provide
automatic frequency equalization. The Warsanis 1401FM-M2; A powerful
and affordable Audio Processor.
Input Filter / Phase symmetry
A phase symmetry circrut removes the asymmetrical waveforms from
the audio signal. Some voices contain asymmetrical waveforms. By
removing the asymmetrical waveforms you can apply more multiband gain
reduction and clipping with less distortion. The phase symmetry can be
switched off by two internal jumpers.
15kHz Low Pass Filter
A 15kHz low pass filter prevents the processing system from 'out of the band' frequencies. (>15kHz).
AGC / Leveler
The level of audio signals from different sources may vary. The
slow AGC keeps the signal in a certain range. Because of the slow time
constants, the AGC does not affect short variations in the audio
signal. There will be no short dynamic changes made by the AGC. The
Gate circuit slows down the release time dramatically if the signal
drops under Gate Threshold. The threshold of the Gate circuit can be
adjusted inside the unit. The AGC / Leveler is can by defeated by a
switch on the front panel.
4 Band Audio Processor
After the crossover filters each of the four audio bands will be
feed into their own Audio Processor. By using this mutiband technique
spectral intermodulation will not occur. For example; when a heavy bass
is applied, it causes only gain reduction on the low band processor and
does not affect the mid, mid high and high band processors. Each
processor Density can be switched between slow, medium and fast. Stereo
Tracking can be selected per band. You can also vary the output level
of Band 1 (low) and Band 4 (high).
Multiband Soft Clipping
In our opinion this is the best way to remove peaks from the
individual bands. Our Soft clipping module does not create noticible
disortion. The outputs of the four soft clipping modules are feed to
their own filters to remove 'out of the band' frequencies. Multiband
Soft Clipping can be switched off by an internal jumper.
Loudness Clipping / Low Pass Filtering
We are using a loudness clipping module to get absolute peak
control. This distortion controlled circuit gives you a peak control
better than 1%. A lot of the peaks are removed by the multiband
clipping module so you can force more Loudness Clipping on the signal
without producing distortion. With this Loudness control you can give
your station the loudness it needs. In highly competitive markets the
Warsanis 1401FM-M2 can produce a very loud signal with a minimum of
distortion. The phase and overshoot filters give you a constant phase
and delay response throughout the frequency range. A 7th order 15 kHz
lowpass filter completes the system so it can be directly connected to
a flat input of a stereo generator. De-emphasis can be selected for a
Easy To Adjust.
In comparison with other Audio Processing units the Warsanis
1401FM-M2 is easy to setup. You only need 12 controls to setup the
entire system. The controls are mounted on the front panel behind the
removable name plate to prevent unauthorized access. The user manual
will easily guide you through the installation procedure.
*25, 50 or 75?S pre- and de-emphasis correction filters
*4 band programmable Audio Processor
*Multiband Filter/Clipper module
*Loudness Clipper Module
*15kHz Low Pass Filter
Stereo Generator Option
Stereo Generator for the 1401FM.
RDS ready; SCA subcarrier input and 19kHz output
Composite Processor (adjustable up to 3dB)
19 kHz notch filter
Adjustable pilot injection
Two separate adjustable composite outputs
Easy line-up with the build in 400 Hz generator
Frequency Response: 0.5dB, 30Hz-15kHz.
Separation: >65dB, 1kHz.
Noise (50 microseconds de-emphasized, 100% modulation): >75dB.
Total Harmonic Distortion: 0.07% THD, 0.065% SMPTE IMD, 30Hz-15kHz.
Crosstalk-Linear (referenced to 100% modulation): -60dB.
Crosstalk-Non-linear (referenced to 100% modulation): -60dB.
38kHz Subcarrier Suppression (referenced to 100% modulation): -60dB.
76kHz Subcarrier and Suppression Sideband (referenced to 100% modulation): -60dB.
Directely connected to the 1401FM output board.
SCA SUBCARRIER INPUT
Configuration: 1 input that sums into composite baseband outputs.
Maximum Input Level: +18dBu.
Impedance: 600 ohms, unbalanced.
Connector: BNC. EMI-suppressed.
COMPOSITE BASEBAND OUTPUT
Source Impedance: 0 ohms or 75 ohms (jumper-selectable).
Load Impedance: 40 ohms >.
Level: Adjustable, 0Vp-p to 9Vp-p with Output Level control.
Connector: BNC. EMI-suppressed.
Switches: 400 Hz line-up generator
Adjustable Controls: Output Levels (Comp 1, 2), Composite processing, Pilot injection, line-up generator.
Safety Standards: CE marked.
PILOT Circuit Characteristics
Injection: Adjustable, 6% to 12%.