Sigtronics US-DR - Manual (Page 12)

When one position transmits, several things take place auto-
matically:
— All headset microphones, except for the transmitting
position, are muted.
— The selected radio is put into transmit mode.
— The headset microphone audio (your voice) is sent to
the selected radio.
— Sidetone is generated and sent to your headphones.*
* Sidetone is a portion of the transmitted voice signal sent
back into your headset so that you can hear what you are
saying while transmitting. The intercom VOLUME control
adjusts the volume level of the sidetone that you hear in
your headset. The other headsets will also hear the transmis-
sion sidetone. Of course, when the PTT switch is released,
(stop transmitting) all functions return to normal, instantly
and automatically.
Sigtronics Installation Hot Line Number:
1-800-367-0977 ext. 8
Monday through Friday, 8:00 a.m. to 4:30 p.m. Pacific Time
www.sigtronics.com
12-22-2008 ULTRINST Rev H
P/N 700062
For Dual Radio Units - US-45D and US-67D:
The operation of the dual radio UltraSound units are identi-
cal to that of the single radio units except for the addition of
radio selection:
Radio Selection of both Radio 1 and Radio 2 radios are pro-
vided by two switches.
1. RADIO 1/RADIO 2 (TALK) determines the radio you wish
to transmit on.
2. AUTO/BOTH (LISTEN) selects which radio(s) you receive
or hear in your headset.
a) “AUTO” position allows you to hear the radio that the
RADIO 1/RADIO 2 switch is set to.
b) “BOTH” position permits you to hear both the radios at
the same time.
UltraSound Specifications
Input Voltage: 11 - 16 VDC
Nominal Current: 0.06 Amps
Maximum Current: 0.10 Amps
Intercom Unit Size: 1-3/4 “ H x 6 - 1/8” W x 4” D
(Mounting bracket & knobs add
9/16” to H & 1 - 3/4” to W)
Weight: 15 oz. (not including cables and hardware)
Warranty: Two Years
igtronics
®
S
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