Wohler AMP2A User Manual page 17

AMP2A and AMP2A-2S User Manual P/N 821553 Rev-B
Level Meter DIP Switch Settings
Two DIP switch modules, accessed through holes in the top cover, allow the user to set the VU/PPM Display Mode and Input Level
Gain Calibration. There are two DIP switch modules; one for each of the two meter bargraphs. There are four sections (1, 2, 3, 4)
on each DIP switch module. The first two sections (1 and 2) are for setting the level meter Input Level Gain Calibration and the
second two sections (3 and 4) are for setting the VU/PPM Display Mode.
Input Level Gain Calibration Settings:
DIP switch sections 1 and 2 set the level meter Input Level Gain Calibration, which determines the level of the input signal that
will result in a "0" reading on the meter bargraph. The factory setting is +4 dBu, but can be set for -6 dBu, 0 dBu, or +8 dBu by the
user. See the diagram below for settings.
Bargraph Display Modes:
DIP switch sections 3 and 4 determine how levels are displayed (PPM or VU mode characteristics). The factory setting is VU. See
the diagram below for settings.
Installation Note: The two level meter Input Level Gain Calibration and VU/PPM Display Mode DIP switch modules are
accessible through openings in the top cover of the unit. Any adjusments to the DIP switch modules should be performed before
installing the unit into an enclosed rack.
Level meter type:
Segment quantity:
Meter display modes (DIP switch selectable):
Level gain (DIP switch selectable):
Level meter scale:
Dynamic range:
Midscale resolution:
Bargraph Length:
LED segment pitch:
Level Meter Settings and Specifications
AMP2A 20-Segment Bargraph Level Meter
DIP Switch Settings (719030 PCB)
Gain Calibration
1 2 4 3
1 2 4 3 1 2 3 4
-6 dBu 0 dBu +4 dBu
LED Bargraph Level Meter Specifications
© 2006 Wohler Technologies Inc. ALL rights reserved
Display Mode
1 2 3 4 1 3 2 4 1 3 2 4
+8 dBu PPM VU
LED bargraph display
20
VU or PPM
-6, 0, +4, +8 dBu
+4 (peak) to -40 dB
44 dB
1 dB
2" (50.8 mm)
0.1" (2.54 mm)
Section 3: Technical Information
17