© 2004 Wohler Technologies Inc. ALL rights reserved
21
AMP2-DA/AVU and AMP2-DA/APP User Manual P/N 821584 Rev-A Section 3: Technical Information
-6 dB PPM
+8 dB PPM
0 dB PPM
+4 dB PPM
Level Gain Calibration DIP Switch Settings
AMP2-AMPPM Meter Driver PCB (919028)
IC2IC1
179036 rev B Top Side
P1
P2
Left Meter
Right Meter
Turn pots clockwise to
increase the display level
threshold (sensitivity) in the
associated meter
The two (one per meter) Level Threshold DIP switches in the APP (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.
PPM Level Meter Specifications and Level Threshold Settings
Level Meter Type:
Level Meter Scale:
Level Meter Threshold:
Level Meter Dynamics:
Mechanical
Standard VU
0 to +8 dBv (factory set to +4 dBv),
trim pot adjustable (internal)
VU (full ANSI)
Level Meter Type:
Level Meter Scale:
Level Meter Threshold:
Level Meter Dynamics:
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
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.
PPM Level Meter Specifications
VU Level Meter Specifications and Level Threshold Adjustment
VU Level Meter Specifications
APP (PPM) Meter Driver PCB - 919028
Level Threshold DIP Switch Settings
AVU (VU) Meter Driver PCB - 919036V
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