BW Broadcast DSPXtra-FM, Руководство по эксплуатации

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Getting The Sound You Want
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Multi-band Limiters:
Increase the band 1 and band 2 limiter drive .
Slow down the peak attack time for bands 1 and/or 2, letting more through to the clippers.
Speed up the release time of the average release time constant of those bands.
Slow down the band 1 and band 2 average attack time so that the peak time constant dominates the control
signal providing faster control.
Decrease the band 1 and 2 HOLD level (higher thresholds) or turn it off.
Decrease the band 1 and 2 Delay time.
Increase the band 1 and 2 limiter threshold, letting more through to the clippers.
Bass clipper: (FM USE)
Increase the multi-band clipper drive.
Increase the bass clip level.
Set the bass clip mode and shape to suit the tone of the bass you prefer.
Look-ahead limiter: (DRUSE)
Increase the look-ahead limiter drive.
Increase the band 1 look-ahead limiter attack time constant slowing down the attack of the secondary time
constant circuit.
Decrease the band 1 look-ahead limiter decay time constant speeding up the decay of the secondary time
constant circuit.
WE SUGGEST ONLY SMALL MODIFICATIONS FROM FACTORY PRESET SETTINGS IF YOU ARE
MODIFYING LOTS OF THE PARAMETERS. IF YOU ARE ADJUSTING ONLY A COUPLE FROM THE
ABOVE SUGGESTIONS THEN YOU PROBABLY HAVE A BIT MORE LEE-WAY. IT IS VERY EASY TO
LOSE YOUR WAY ONCE YOU START 'TWEAKING' LOTS OF DIFFERENT SETTINGS.
More TREBLE (HF)
We can obtain more high frequency energy in several ways. When processing for FM we need to use distor-
tion controlled clipping to preserve as much of the high frequency content as possible, which will be removed
by the de-emphasis curve in the listeners radios. The ‘HF CLIPPING’, band 5 and/or 6 ‘PEAK ATTACK’ and
‘THRESHOLD’ controls governs the amount of high frequency control distortion controlled clipping that is per-
formed.
Digital radio users should avoid high HF clipping settings as they put extra workload on the look-ahead limiter.
Dual use (FM and DR) users can compensate for the HF clipping control with the look-ahead shelf control.
Ariane AGC:
Speed up the band 4 AGC release time, making it faster.
Lower the IDR setting.
Increase the GATE threshold, allowing more gain to be applied to low level HF waveforms.
Reduce the B4<3 coupling control so that band 4 has independent level control and is not coupled to band 3.
Multi-band Limiters:
Increase the band 5 and 6 limiter drives.
Slow down the peak attack time for band 5 and 6, letting more through to the clippers.
Speed up the release time of the average release time constant of those bands.
Slow down the band 5 and 6 average attack time so that the peak time constant dominates the control signal
providing faster control.
Decrease the band 5 and 6 HOLD levels or turn them off.
Decrease the band 5 and 6 delay time.
Increase the band 5 and 6 limiter threshold, letting more through to the clippers.
HF clipper: (FM USE)
Increase the multi-band clipper drive.
Increase the HF clipper level.
Set the HF clipping control to higher numbers which shifts control from the limiters to the distortion controlled
HF clipper.
Look-ahead limiter: (DRUSE)
Increase the look-ahead limiter drive.
Increase the band 4 look-ahead limiter attack time constant slowing down the attack of the secondary time
constant circuit.
Decrease the band 4 look-ahead limiter decay time constant speeding up the decay of the secondary time