User guide

© 2009 Wohler Technologies, Inc. All rights reserved.
20
AVMFlex58W Series User Guide
Audio and Metering
speaker channel will reproduce the mid-range and high-range
frequencies of the English speaking voice, the right speaker channel
will reproduce the mid-range and high-range frequencies of the
Spanish speaking voice, and the woofer speaker channel will reproduce
the summed (combined) low-range frequencies of both voices.
If the balance control is panned to the left, then the Spanish speaking
voice in the right speaker channel will diminish in volume, the Spanish
speaking voice in the woofer speaker channel will also diminish, and
the English speaking voice in both the right speaker channel and
woofer speaker channel will increase slightly (to maintain overall
output level). The converse is true if the balance control is panned to
the right. See Figure 1–9 on page 19 for placement of the balance control
in the audio amplifier circuit.
Level Meter Settings
Level Meter DIP Switch Location
Two DIP switch modules allow the user to set the level meter parameters
independently for each of the two bar graph displays. These DIP switches
are accessible by removing the top cover of the unit and are located on
two PCBs installed at right angles to the front panel where the level
meters are installed. The DIP switches face upwards for easy adjustment.
There are four sections (1, 2, 3, 4) on each DIP switch module. The first
two sections (1 and 2) are for setting the meter input gain calibration
and the second two sections (3 and 4) are for setting the bar graph
display mode.
Meter Input Gain Calibration Settings
DIP switch sections 1 and 2 set the meter input gain calibration, which
determines the level of the input signal that will result in a zero reading
on the meter bar graph’s. The factory setting is +4 dBu, but can instead
be set for -6 dBu, 0 dBu, or +8 dBu by the user. See Figure 1–10 on page
21 for settings.