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If more than one radio interface module is used in a Series 3800
NOTE:
System connected to a common mobile radio the speaker audio
connections should be made to only one of the modules.
3. C38-** Jumper Cords, of appropriate length, are used to connect the U3813 Module to other
components within the system. Connect one end of the jumper cord to one of the connectors
on the U3813 labeled "System Input" and the other end of the jumper cord to a connector on
the U3800, or other module, labeled "System Input', or "Remote Output".
NOTE:
All of the 4-socket connectors on any module within a system are
acceptable connection points for jumper cords.
4. Remote PTT switches may be used in conjunction with the U3813. These devices attach to
the U3813 using the 5-socket connector labeled "Remote PTT". A connector kit P/N
18352G-07, when necessary, is used to connect the PTT switch to the U3813. The heavy
duty Footswitch (P/N 40071G-04), with a 15 foot cord and connector, is specifically
designed for this purpose but any SPST switch may also be used.
5. Connect a Series 7000 Headset to the connector on the face of the U3813 by lifting the cover
on the U3813 and seating the headset connector firmly into the receptacle.
OPERATION
1. Adjust headset for a comfortable fit.
2. Position the boom-mounted microphone directly in front of your mouth, within 1/8" of your
lips.
NOTE:
In order to properly cancel background noise and provide clear
communications, placement of the microphone must be within 1/8"
of your lips.
3. Adjust the listen level control on the U3813 to a comfortable level.
4. The receive audio from the radio will be heard in all headsets connected to the system.
5. To transmit over the radio, depress and hold the PTT switch on the U3813 or depress and
hold the remote PTT switch, if your system is so equipped.
:
Radio speakers mounted near the headset may produce feedback,
NOTE
causing a squeal when transmitting. If this occurs the speaker should
be relocated, or a speaker cutoff switch should be installed.
Remote PTT Connector Diagram
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