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Volume
Matches the output level of the receiver to the
input gain of the mixer. (For details refer to
page 27).
Frequency color code platelet
Receivers using the same frequen-
cy are marked with the same color
code.
RF LED
Illuminates to indicate that RF signal is being
received. If the RF signal fails or the squelch
comes on, the MUTE LED will be lit.
ON/OFF switch
with status LED.
Antenna
The swiveling antenna is mounted on the
front panel, allowing the receiver to be
rack mounted.
Case
The side panel supports are removable for
mounting the receiver in a 19" rack.
XLR connector
Plug it in. That's all you need to do to convert any hardwire dynamic mic to wireless.
Obviously, you can use the SO 40 to add a radio link to any other audio source with an XLR output as well.
The XLR connector on the SO 40 is wired for pin 2 hot (international standard).
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Setting the squelch threshold
The job of a s squelch circuit is to reduce audible noise. It
eliminates noise during pauses in the audio signal by
muting the receiver every time the audio level drops below a
defined threshold. The SQUELCH control on the receiver sets
this threshold. Use the SQUELCH control with care! If the
squelch threshold is too high, the squelch will not only cut
out noise but mute quiet audio signals as well because the
squelch responds to the detected voltage and cannot distin-
guish between wanted signal and noise. Besides that, a too
high squelch treshold also decreases the usable range.
Alternative receivers
You can also use the SO 40 with the SR 40 diver-
sity receiver or the PR 40 portable receiver.
SR 40 Receiver
AKG WMS UHF VOCALS
SO 40 Input wiring diagram
XLR connector
(pin 2 hot)