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1.913.101-.108/.321-.324/.605-.610
VU/PPM LED Level Meter Modules
Contents
1 General .................................................................................................................................................................. 2
2 Functional Description .......................................................................................................................................... 3
3 Technical Specifications........................................................................................................................................ 3
4 Block Diagram ...................................................................................................................................................... 4
5 Alignment.............................................................................................................................................................. 4
Component
Diagrams PCB No. Diagram Parts List
Layout
VU/PPM 30 LED with GRM 1.913.293.00 1.913.293.00
1.913.293.00 1.913.293.00
VU/PPM 30 LED 1.913.294.00 1.913.294.00
LED PPM Meter (10 LED) 1.913.291.00 1.913.291.00 1.913.291.00 1.913.291.00
Scope of Validity
These instructions apply to the following assemblies:
1 Channel, 2 Channels, 2 Channels, 4 Channels,
Display PCB No.
dark front panel dark front panel bright front panel dark front panel
PPM 1.913.101 1.913.105 1.913.605 1.913.321 1.913.294
VU 1.913.102 1.913.106 1.913.606 1.913.322 1.913.294
PPM w. GRM 1.913.103 1.913.107 - 1.913.323 1.913.293
VU w. GRM 1.913.104 1.913.108 - 1.913.324 1.913.293
PPM w. additional 1.913.294,
- - 1.913.610 -
small level meter 1.913.291
Date printed: 12.06.2002 10.27.1481 (0602) VU/PPM Meters 1
1.913.101-.108/.321-.324/.605-.610
1 General
The Level Meter units with 30 LEDs have been developed for installation
in the display panel of Studer Mixing Consoles. Instruments with VU (vol-
ume unit) and PPM (peak program meter) characteristics, with or without
gain reduction meter (GRM) are available. Instead of bar-graph indication,
also dot indication is optionally available.
The instruments listed below are equipped with the PCBs 1.913.294 (VU
or PPM) or 1.913.293 (VU or PPM with gain reduction meter) according to
the table above. Please consult the circuit diagram relating to the corre-
sponding assembly number.
1.913.102 * 1.913.106 * 1.913.322 *
1.913.104 1.913.108 1.913.324 1.913.606 *
VU Meters:
20 20 20 20 20 20
3
+
10 10 10 10 10 10 2
1
dB dB dB dB dB dB
GRM GRM GRM GRM GRM GRM
100 0 100
1
80 2 80
3
60 60
3 3 3 3 3 3 5
+ + + + + +
2 2 2 2 2 2 7
40 40
170 1 1 1 1 1 1
10
20 20
100 0 100 0 100 100 0 100 0 100 0 100 0
1 1 1 1 1 1 %
20
dB % 190
80 2 80 2 80 80 2 80 2 80 2 80 2 VU
3 3 3 3 3 3
60 60 60 60 60 60 60
5 5 5 5 5 5
7 7 7 7 7 7
40 40 40 40 40 40 40
10 10 10 10 10 10
20 20 20 20 20 20 20
20 20 20 20 20 20
% dB % dB % % dB % dB % dB % dB
VU VU VU VU VU VU
40 40 120
40
1.913.101 * 1.913.105 * 1.913.321 *
1.913.103 1.913.107 1.913.323 1.913.605 * 1.913.610 *
PPM Meters:
20 20 20 20 20 20
12 12
+ +
10 10 10 10 10 10
6 6
dB dB dB dB dB dB
GRM GRM GRM GRM GRM GRM 0 0
6 6
12 12 12 12 12 12 12 12
+ + + + + +
6 6 6 6 6 6 18 18
170
0 0 0 0 0 0 24 24
dB dB 190
6 6 6 6 6 6 PPM PPM
12 12 12 12 12 12
18 18 18 18 18 18
+ 3 + 3
+ 2 + 2
24 24 24 24 24 24 + 1 + 1
0 0
dB dB dB dB dB dB