Sigtronics Dual-CFR - Manual (Page 2)

Headphone Output:
Each CFR system is designed to easily drive four or more 300
to 1000 ohm headsets. Noise attenuating, full cushion head-
sets, such as the Sigtronics SE-8, or SE-48 are recommended
for best results. The UltraSound system incorporates an auto-
matic headphone limiting circuit to eliminate the possibility
of painful spurious radio or noise spikes from getting to the
headsets and into your ears.
Universal Radio Interface is design to accommodate virtu-
ally any type of communication radio. Adjustments for radio
receive level and transmit microphone level are provided to
perfectly match the UltraSound system to your particular
radio.
Automatic Sidetone Generation allows everyone on the
vehicle to hear both sides of the radio conversations.
Excellent RF Immunity guarantees clean, clear, radio com-
munications.
Standardized for use with Sigtronics single plug headsets
(ie. SE-8, SE-48, SE-18).
Model Differences:
The CFR is used in applications requiring up to four persons
at one time on intercom. Two of the four have radio transmit
capability. The Dual-CFR is actuality two CFR units so it can
accommodate up to eight persons at one time on intercom,
four radio transmit positions, and will allow two of the posi-
tions to have simultaneous radio transmit.
CONTROL FUNCTIONS
VOLUME — Intercom Volume — Adjusts intercom volume
level. Does not affect radio volume.
SQUELCH — Intercom Squelch — Adjusts VOX operation of
the intercom for variations in background noise levels.
RADIO MIC TRANSMIT GAIN — Located on the back of the
unit — Sets the transmit mic audio level for the radio(s).
RADIO VOLUME — L ocated on the back of th e unit — Sets the
range of receive audio from the radio(s).
ULTRASOUND INSTALLATION
Standard Equipment Included
Besides the Intercom unit, each UltraSound system comes
complete with the following:
CFR Dual-CFR
Intercom Mounting Bracket 1 1
Headset Jack Box and Cover
with Pre-mounted Headset Jack
4 8
PTT Switch Pre mounted
in PTT Box and Cover 4 8
Headset Hooks 4 8
Jack Box Cover Screws 16 32
Jack Box and Bracket Mounting Screws 28 56
Wire Grommets 8 16
Jack Insulator Washer, Flat 5 10
Jack Insulator Washer, Shoulder 5 10
4 ft. Headset Jack and PTT Switch Cable 1 2
4 ft. Radio Interface Cable 2 4
4 conductor hook-up wire (Roll) 1 2
Installation Overview:
Sigtronics has simplified the installation process, to assure
perfect operation. Refer to the UltraSound Wiring Diagram
(for CFR see Figure 4 on page 5; for Dual-CFR see Figure 5 on
page 6). If you have any installation questions or problems
that are not addressed in this manual, feel free to call our
installation hot line number located on the last page of this
manual.
Installation of the Sigtronics UltraSound System is a four step
process:
I. Mount the intercom unit.
(INTERCOM CHASSIS INSTALLATION)
II. Install the headset jacks and PTT switches.
(HEADSET JACK AND PTT SWITCH INSTALLATION)
III. Wire the jacks and PTT switches.
(HEADSET JACK AND PTT SWITCH WIRING)
IV. Wire the radio(s). (RADIO HOOK UP)
I. INTERCOM CHASSIS INSTALLATION
Intercom Placement:
There are a few factors to consider when selecting a mount-
ing location for the UltraSound Intercom chassis:
1. The unit should be placed in such a way that the controls
on the front of the unit can be easily seen and operated.
Most commonly, this will be near the vehicle’s communi-
cation radio controls.
2. The Intercom unit is primarily designed to be dash
mounted. It can be mounted on top of the dash or hang
below the dash or vehicle ceiling. The mounting bracket
is adjustable to allow for various mounting angles.
2