3-2
3.
Apply the tone to the left input only. Connect a meter to the LT (left total) output
and adjust the LT output control to obtain studio reference level. Move the meter
to the LT EPL send connector and adjust the LT EPL send control for studio
reference level.
4.
Repeat step 3 for the right channel by connecting the signal source to the right
input only and adjusting the RT output controls for reference level at the RT
outputs.
5.
If you will be using the external processor loop, engage it by linking pins 6 and 7
on the remote control socket J507. Feed the reference tone into the L and R EPL
return connectors (together or separately) and adjust the EPL return
potentiometers to obtain reference level at the LT and RT outputs.
This completes the basic calibration of the SEU4. If the EPL loop is not to be used, remove
the link between pins 6 and 7 of J507 to restore normal operation.
Overall encoder operation and calibration can be verified by connecting the external
reference tone to each input in turn and observing the following levels on the LT and RT
outputs.
When applied to input
Output should read:
at reference level:
LT
RT
L only
ref
--
C only
ref –3 dB
ref –3 dB (in phase)
R only
--
ref
S only
ref –3 dB
ref –3 dB (out-of-phase)
MAIN
