Timewave DSP-599zx, Operating Manual

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DSP-599zx Audio Noise Reduction Filter
March 6, 1997 6-3
Random Noise Reduction
The random noise reduction mode was not designed for data signals, but
Timewave DSP users have found it helpful under some conditions. Gener-
ally, do not use the Random mode for data. If noise conditions are severe,
and you have tried other filter combinations, then try the Random mode. To
activate random noise reduction, press
[Random] .
Data Bypass Mode
Pressing
[Bypass]
places the DSP-599zx into an electronic bypass mode.
In the data mode, the bypass mode routes the signal through an allpass DSP
filter which has precisely the same delay as the normal narrow band filter.
When switching from data mode to bypass mode, this prevents a time dis-
continuity that can cause an AMTOR or PacTOR link to lose synchroniza-
tion. The bypass mode has precedence over the Data mode. When the DSP-
599zx is in bypass, the settings of the gain control and the parameter select
push buttons do not affect the signal.
• Bypass respects the status of the speaker switch. If the speaker is turned
off, bypass leaves it off. The speaker will always, however, come on
when power is turned off on the DSP-599zx. Turning off or removing
power from the DSP-599zx automatically de-energizes the bypass relay
and forces the DSP-599zx into the relay bypass mode.
Function
6
Shift
5
AGC
3
Bypass
Data
DSP-599zx
CW
Voice
Mode
1
Random
4
Tone
2
599-058
Setup
Test
Rcl/ Store
Spkr/ Chan
High Pass
Center Freq
Time
Function
6
Shift
5
AGC
3
Bypass
Data
DSP-599zx
CW Voice
Mode
1
Random
4
Tone
2
599-059
Setup Test
Rcl/ Store
Spkr/ Chan
High Pass
Center Freq
Time