Re: Compressor working?
2001-12-29 by Dieter Waechter
Yes- I can help.
Here is a part of my GSP 2101 Service- Test. It's
the section "Compression Check".
This is in HTML!
ยง Compression Check
1. Select Compression (SW21) and turn on
(SW30).
2. With probe on TP3, verify ratio (press SW29 then turn data wheel from 1.5:1 to INF:1).
3. Verify Threshold (SW28 then turn data wheel from -30dB to -45dB).
4. Verify Compression Output Level (SW27 then turn data wheel from -6 to 6).
2. With probe on TP3, verify ratio (press SW29 then turn data wheel from 1.5:1 to INF:1).
3. Verify Threshold (SW28 then turn data wheel from -30dB to -45dB).
4. Verify Compression Output Level (SW27 then turn data wheel from -6 to 6).
...
** If compression do not sound right, refer
the charts at the end of these procedures.
...
**Additional Information for Compression Check
1. Apply a 1kHz signal so that 2Vpp is measured at U20 pin 1.
2. Set compressor output level to 0dB.
3. Use the following chart to verify the correct compression ratios and thresholds
DC voltages at U9 pin (+/-10%)
Threshold
Ratio
-30
-35
-40
-45
1.5:1
-1.19
-1.39
-1.59
-1.8
2:1
-1.34
-1.57
-1.8
-2.03
3:1
-1.82
-2.13
-2.44
-2.75
4:1
-2.06
-2.41
-2.75
-3.1
5:1
-2.15
-2.52
-2.87
-3.24
7:1
-2.32
-2.71
-3.09
-3.49
10:1
-2.51
-2.93
-3.34
-3.76
INF:1
-2.82
-3.28
-3.72
-4.18
Hope that helps...
If not... there will come more information on my
homepage (laaaater)
Dieter
----- Original Message -----
From: "Mark Bratcher" <mbratche@...>
To: <2101@...-dod.com>
Sent: Saturday, December 29, 2001 3:30
AM
Subject: 2101: Compressor
working?
>
> I bought a used DigiTech GSP-2101 that has an Artist 3.0 upgrade.
>
> Everything seems to work except the compression. I change the compression ratio
> (from 1.5:1 to Inf:1) and I can't preceive much of a difference in sound.
>
> Is it possible for just the compression to be malfunctioning in the unit,
> or is the compression in this thing that subtle?
>
> Any input appreciated!
>
> Thanks.
> --
> Mark Bratcher
> ---------------------------------------------------------
> Escape from Microsoft's proprietary tentacles: use Linux!
>
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