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AMP2-VSDA/AV and AMP2-VSDA/AM User Manual P/N 821576 Rev-B
PPM Level Meter Specifications and Level Threshold Settings
The two (one per meter) Level Threshold DIP switches in the AM (PPM) unit are only accessible by removal of the top cover. Each DIP
switch is physically located on the inside front panel above the level meter to which it is dedicated. Each meter can be independently set with
a possibility of four settings; -6, 0, +4, or +8 dBv. Factory setting is +4 dBv. See the diagram below for DIP switch settings.
VU Level Meter Specifications and Level Threshold Adjustment
Level Gain Calibration adjustment for the AV (VU) unit is done by adjusting two trim pots (P1 and P2) on the level meter driver PCB
(919036V). The units top cover must be removed to access this PCB, which is mounted in the center of the chassis bottom. P1 adjusts the
left meter; P2 adjusts the right meter. Clockwise rotation of either meter will increase the level of the associated meter. Adjustment range for
each meter is 0 to +8 dBv.
AMP2-AMPPM Meter Driver PCB (919028)
AMP2-AMPPM Meter Driver PCB
Level Gain Calibration DIP Switch Settings
Level Threshold DIP Switch Settings
-6 dB PPM
+4 dB PPM
PPM Level Meter Specifications
Level Meter Type:
Level Meter Scale:
Level Meter Threshold:
Level Meter Dynamics:
IC1
P1
Left Meter
VU Level Meter Specifications
Level Meter Type:
Level Meter Scale:
Level Meter Threshold:
Level Meter Dynamics:
© 2004 Wohler Technologies Inc. ALL rights reserved
0 dB PPM
+8 dB PPM
Mechanical
Specify BBC (1 to 7) or EBU type 1
and 2 (specified when ordered)
-6, 0, +4, or +8 dBv: DIP switch
selectable (internal)
PPM
Turn pots clockwise to
increase the display level
IC2
threshold (sensitivity) in the
associated meter
P2
Right Meter
Mechanical
Standard VU
0 to +8 dBv (factory set to +4 dBv),
trim pot adjustable (internal)
VU (full ANSI)
Section 3: Technical Information
23
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