Stereo Send Operation - Pacific Research BMX-III-18 Operation And Technical Manual

BMX SERIES III CONSOLE
MONAURAL LINE OUTPUT AMPLIFIER
Apply a 1 kHz test signal at -10 dBu (600 ohm source) to the module Patch Return. Adjust the module
GAIN TRIM control for a +8 dBu output into a balanced bridging load.
VU METER BUFFER AMPLIFIER CALIBRATION
The gain trim control for each VU meter buffer amplifier is located on the buffer amplifier PC assembly.
PROGRAM, AUDITION and UTILITY meters: Apply a 1 kHz test signal at -10 dBu (600 ohm source)
to both the left and right Patch Returns of the appropriate Stereo Line Output Amplifier. Adjust both
meter gain trim controls for 0 VU.
AUXILIARY meters: Apply a 1 kHz test signal at +8 dBu to Meter Switcher Module external INPUT
1. Adjust both meter gain trim controls for 0 VU.
METER SWITCHER MODULE
NOTE: The Meter Switcher Module amplifiers should be adjusted after the VU meter amplifiers have
been calibrated.
The Meter Switcher Module has a pair of amplifiers which boost the level of the CUE and SOLO VU
meter signals from -10 dBu to +4 dBu. The gain trim controls for these amplifiers are located on the
module PC assembly (R5 and R19) and are accessible by removing the adjacent modules, or by using
an extender board.
Apply a 1 kHz test signal at -10 dBu to the left and right Patch Returns of a Stereo Line Input Module.
Place the module in CUE and adjust the Meter Switcher Module gain trim controls for a 0 VU level
on the AUXILIARY meters.

5.3 STEREO SEND OPERATION

Normally, the input module Send 1 and Send 2 signals are a monaural sum of the left and right input
signals. However, the Stereo Line Input Modules may be modified for stereo Send operation by cutting
the two jumpers between points E1 and E2 and points E3 and E4 on the module PC assembly. Removing
both of these jumpers provides a monaural mix to either Send-1 or Send-2. However, when both Send
assignment buttons are depressed the left module channel is routed to Send-1 and the right to Send-2.
Microphone Input Modules may also be modified in this manner by cutting the jumpers between points
E5 and E6 and points E7 and E8 on the module PC assembly. This modification allows the post-fader
microphone signal to be manipulated in the stereo image by means of the module PAN control.
NOTE: PRE-fader Microphone Input Module operation will be the same as before this modification.
PACIFIC RESEARCH & ENGINEERING REVISION C
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