Sigtronics SPCC-2 - Manual (Page 2)

TECHNICAL HIGHLIGHTS which make the SPCC
unbeatable are:
Fail-Safe Bypass Switch allows the pilot to operate
the aircraft radios even if the unit is turned off.
Automatic Sidetone Generation lets the pilot and
copilot hear what the other is transmitting over the
radios.
Separate Transmitter Microphone Gain
Adjustments adjust the aircraft radio and the FM
radio.
Excellent RF Immunity guarantees clean, clear
transmissions.
Power Requirements: A standard cigarette lighter
socket (11 to 34 VDC) or a battery pack.
Standardized to general aviation headsets and
portable push-to-talk switches. (The unit can also
be wired into permanently installed PTT switches).
Helicopter headsets will also work with the unit if
headset plug adapters are used.
APPLICATIONS
• Airborne Law Enforcement - Small police
departments to large organizations like the FBI.
• Civil Air Patrol/Coast Guard -Air search and
rescue operations.
• Medevac Helicopters - Medical emergency
aircraft
• Airborne Fire Control
• Forestry Departments
• Wild Life Organizations - Survey and tracking
operations
• TV News Crews
• Airborne Traffic Reporters
• Ground Operations requiring more than one
radio.
• Additional aircraft VHF radio capability -Add an
inexpensive hand-held aircraft radio as a second
radio without installation costs.
CONTROL FUNCTIONS
ON / BYPASS - Power Switch - In “ON” position;
supplies power to all SPCC circuits. In “BYPASS”
position; disables all unit functions, and connects
pilot directly to the aircraft radios. A fail-safe feature!
VOL - Intercom Volume - Adjusts intercom volume
level.
SQ - Intercom Squelch - Adjusts VOX operation of
the intercom for variations in headset microphones
and background noise levels.
XMIT SELECT -Transmit Select - Used to select
which radio to transmit on.
BOTH / OFF / AUTO - Receive Select - Used to select
which radio is heard. In “BOTH” position, you hear
both aircraft and FM radios. In “OFF” position, you
do not hear either radio. In “AUTO” position, only
the radio selected by the XMIT SELECT switch is
heard.
AUX / OFF -Auxiliary Select - Turns the auxiliary
input source on or off.
REC VOL - Receive Volume - A general control used
to set the volume level of the aircraft radio(s), FM
radio, and the auxiliary monitor input.
A/C RADIO MIC GAIN ADJ - Aircraft Radio
Microphone Gain Adjustment - Sets the transmit
mic audio level for the aircraft radio(s).
FM RADIO MIC GAIN ADJ - FM Radio Microphone
Gain Adjustment - Sets the transmit mic audio level
for FM radio.
SPCC INSTALLATION
The SPCC requires six simple connections to put it
into operation. The power cord, the aircraft radio,
the FM radio, the auxiliary audio input source
(optional), the push-to-talk switches, and the
headsets must all be connected for the system to
work as designed. But do not fear, Sigtronics has
simplified the connection process, so it will just
take a few moments. Refer to the SPCC connection
drawing Figure 1 on page 3.
1. Power Cord: The four foot power cord with
LED Power Indicator is designed to plug directly
into a standard cigarette lighter socket. The LED
indicator will be on if power is available, it will
be off if no power or reversed socket wiring.
Note: The LED shows power available, not SPCC
On or Off. The SPCC will run on 11-34 VDC, so it
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