Operation – JK Audio Universal Host User Manual
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Using balanced XLR cables (not included) with 1/4” TRS adapt-
ers if necessary for your mixer, make all connections as shown.
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On your mixer and on Universal Host, set all controls to nominal
levels, usually 12:00.
•
On your mixer, set local microphone channel input gain for good
microphone level.
•
On your mixer, set all output faders and the main mix control for
good recording level of the local audio.
•
On your mixer, set the headphone level for comfortable listening.
•
On your mixer, set the Caller channel input gain to line level, if
there is a selector switch. If there is no line level input and you
must connect the Caller to a Mic in, turn the input gain way down.
•
On your mixer, set the Aux control for Caller channel only to mini-
mum (zero or ∞). Aux controls for all other channels should ini-
tially be set at 12:00. Set Aux Send Master for good overall level.
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Place a test call to a quiet location. Set the A-B-C switch on the
Universal Host for best audio. If the Receive LEDs on the Univer-
sal Host are lighting the red –3 dB, use the controls on the base
of your telephone to reduce the incoming Caller volume.
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On your mixer, set the Aux Send control so that while you are
speaking into the microphone the Send LEDs on the hybrid light
the -20 dB green LED consistently and flash the -9 dB green
LED. An occasional flash of the -3 dB red LED is acceptable. If
the red LED stays on, lower the level.
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If you need to adjust the Caller level, first set the caller channel
input gain on the mixer, then adjust the Caller knob on the hybrid.
Mix-Minus Setup
A mix-minus signal is an audio signal that contains a mix of your
local microphones plus any other audio, minus the Caller's own
voice. Sending the Caller’s own audio back to the Universal Host
through Send 1 will cause an echo, or feedback.
If your mixer does not have an Aux Send bus, you can achieve the
same results using Pan controls with the Left and Right outputs.
Simply pan the Caller to the Right output. Then connect only the
Left output to the Universal Host Send 1. Or, you may use an
external Mix-Minus box that will create this signal for you.
Operation