Rc-18Xx Radio Cable; Rc-Xx Unterminated Radio Cable - Setcom IM-900 Installation And Operation Manual

3.22 RC-18xx Radio Cable

3.23 RC-xx Unterminated Radio Cable

The Terminated Radio Cable is fitted with the mating connector for the
port on the RIM-900-BAL and with the mating connector for the
accessory port or option cable of the radio on the other end. A radio
cable is used in place of a LMACB-xx (MACB-xx) Microphone Adapter
Cable on those radios with this accessory connector provision. A
terminated radio cable allows plug-in installation, retention of the hand
mic, and easy exchange of the radio for maintenance. Use of a Setcom
radio cable will not void a new radio warranty and eliminates problems
that can occur if a radio cable is miswired. The Setcom radio interface
identifier for the radio cable will follow the number indicating the length of
the cable. For example, in the Setcom part number RC-18GTC shown
left, the "RC" stands for Radio Cable, the "18" stands for length of the
cable in feet and the "GTC" is the Setcom radio interface identifier. The
GTC in this example means the cable will plug into a MA/COM P7 option
cable that connects to a range of MA/COM radios.
A few radios have handmics that are "HOT". This means the
NOTE:
microphone is active and connected to the radio whenever the radio is
keyed. This can cause both the keying headset boom microphone and
the handmic to be active when the radio is keyed from the intercom
system. This will cause double loading of the transmit circuits which will
cause a decrease in transmit audio and objectionable background noise
from the handmic. On many newer radios this problem can be eliminated
through a menu item of the radio's software. Alternately, a handmic can
easily be replaced or converted to a version with contacts for both the
microphone and the PTT circuit or the handmic can be removed and
stowed in the glove box for backup purposes
The RC-xx Radio Cable is terminated one end only for connection to a
IM-900/IM-900E Master Station. The length of the cable is indicated by
the xx in the cable name. It is unterminated on the radio connection
end. An unterminated radio cable is hardwired by a radio technician
directly to the radio. In some case the radio technician may install their
own plug and jack arrangement. A radio cable may be used in place of
a MACB-xx Microphone Adapter Cable, however, is not recommended
for self-installations being done by personnel not normally engaged in
technical services.
Warning: A radio manufacturer's warranty may be voided if the radio
case is opened or if a radio cable is soldered directly to the radio. To
ensure preservation of warranty, a terminated Radio Cable or
Microphone Adapter Cable should be used.
NOTE: A few radios have handmics that are "HOT", this means the
microphone is active and connected to the radio whenever the radio is
keyed. This can cause both the keying headset boom microphone and
the handmic to be active when the radio is keyed from the intercom
system. This will cause double loading of the transmit circuits which will
cause a decrease in transmit audio and objectionable background
noise from the handmic. On many newer radios this problem can be
eliminated through a menu item of the radio's software. Alternately, a
handmic can easily be replaced or converted to a version with contacts
for both the microphone and the PTT circuit or the handmic can be
removed and stowed in the glove box for backup purposes
.
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