Sigtronics US-DR - Manual (Page 2)

Headphone Output:
The UltraSound system is designed to easily drive six or more
300 to 1000 ohm headsets. Noise attenuating, full cushion
headsets, such as the Sigtronics SE-8, or SE-48 are recom-
mended for best results. The UltraSound system incorporates
an automatic headphone limiting circuit to eliminate the pos-
sibility of painful spurious radio or noise spikes from getting
to the headsets and into your ears.
Universal Radio Interface is designed to accommodate
virtually any type of communication radio. Adjustments for
radio receive level and transmit microphone level are pro-
vided to perfectly match the UltraSound system to your par-
ticular 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 US-45S is used in applications requiring up to four per-
sons at one time on intercom. Two of the four have radio
transmit capability. The US-45S is designed for use with a
single vehicle radio. The US-45D is identical to the US-45S
but can accommodate two separate vehicle radios.
The US-67S is for single radio operations and can intercom
up to six people at one time. Three of the six can transmit on
the vehicle radio. Similarly, the US-67D is just like the US-67S,
but with dual radio capability.
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 1/RADIO 2 (TALK) — Transmit Select (US-45D and
US-67D units only) — Used to select which radio to talk on
— Radio 1 or Radio 2.
AUTO/BOTH (LISTEN) — Receive Select (US-45D and US-
67D units only) — Used to select which radio is heard. In
“BOTH” position, you hear both Radio 1 and the Radio 2. In
“AUTO” position, only the radio selected by the RADIO
1/RADIO 2 switch is heard.
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:
US-45S/45D US-67S/67D
Intercom Mounting Bracket 1 1
Headset Jack Box and Cover
with Pre-mounted Headset Jack
4 6
with Pre-mounted Headset Jack
& Splash Cover
1 1
PTT Switch Pre mounted
in PTT Box and Cover 3 3
Headset Hooks 4 6
Jack Box Cover Screws 16 20
Jack Box and Bracket Mounting Screws 28 36
Wire Grommets 8 10
Jack Insulator Washer, Flat 5 7
Jack Insulator Washer, Shoulder 5 7
4 ft. Headset Jack and PTT Switch Cable 1 1
4 ft. Radio 1 Interface Cable 1 1
4 conductor hook-up wire (Roll) 1 1
4 ft. Radio 2 Interface Cable 1* 1*
* Supplied with US-45D and US-67D (dual radio) units only.
Installation Overview:
Sigtronics has simplified the installation process, to assure
perfect operation. Refer to the UltraSound Wiring Diagram
(for US-45S or US-67S see Figure 4 on page 5; for US-45D or
US-67D 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