Sigtronics SCI-6 - Manual (Page 6)

co-pilots mic will go out on the radio. Depending upon which prior-
ity mode is selected, only the pilot or both will go out when both
PTT switches are pressed at the same time. When transmitting,
everyone on the intercom will hear the transmitting pilots voice via
the SCI sidetone return.
CREW MODE - When the SCI is in the “CREW” mode, transmitting
from both pilot and co-pilot positions are possible. The pilot selects
the appropriate radio he wishes to use. When the pilot presses his
PTT switch, his headset mic is automatically routed through the
intercom to the radio. Only his mic will be live. The microphone of
the co-pilot will be muted when the pilot transmits. Similarly, when
the co-pilot transmits, only the co-pilots mic will go out on the radio.
Depending upon which priority mode is selected, only the pilot or
both will go out during simultaneous keying of the PTT switches.
When transmitting, the pilots will hear their own voice via the SCI
sidetone return. In this mode, the passengers will still have the
ability to intercom among themselves and not be bothered by radio
traffic interruptions or crew intercom conversation. Similarly, the
pilots will not hear the passenger’s conversations.
ISO MODE - When the SCI is set to the “ISO” mode, only the pilot
can transmit and receive on the aircraft radio(s). The pilot will not
Congratulations, you have purchased one of the finest intercom systems available for your aircraft.
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Sigtronics headsets are designed like no other headset for top-notch performance even in the noisiest of environments.
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Reduction Rating (NRR) on every headset. Durable polyurethane ear seals are impervious to perspiration and ultra violet
deterioration. Speaker elements are high efficiency, tailored to the conversation bandwidth, and are not affected by changes
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fabric or composite aircraft or when used with handheld radios. 105 strand, stop break high-flex cords can withstand up to
95 lbs. of strain.
Along with our standard general aviation headsets, Sigtronics also manufactures full stereo headsets. These headsets
utilize an infinite baffle system to deliver true high fidelity sound and offer an integrated stereo / mono switch and dual
volume controls for the ultimate in quality, comfort and sound reproduction for the discriminating pilot. Stereo headsets are
also recommended for those with unequal hearing abilities in each ear.
All Sigtronics headsets can be custom fit by choosing one of the available three headband sizes; regular, large, or petite /
children.
For more information on our line of headsets or any other Sigtronics product see your local Sigtronics Dealer or visit our full
service web site at
www.sigtronics.com .
Made in U.S.A.
Sigtronics Corporation
178 East Arrow Highway
San Dimas, Ca 91773
909) 305-9399
www.sigtronics.com
…when it counts!
SCI4INST REV C 1-8-2007 P/N 700110
hear intercom and cannot talk to the other headsets. The co-pilot
and passengers still have intercom, but do not hear the radios. If
the radio does not provide transmit sidetone, then the pilot will not
hear his voice in the “ISO” mode.
SOLO FLIGHTS
Since the intercom is not needed during solo flights, it may be
turned to the “ISO” position. The pilot will still hear the aircraft
radio(s), since this circuit is always active, and may transmit to
ATC via his headset and push-to-transmit switch. If radio does not
provide sidetone, then switch intercom mode to “CREW”.
FAIL-SAFE
If power to the SCI unit fails, the pilot can still transmit and receive
on the a/c radio(s) (assuming the radio(s) are still functioning).
Additionally, if a problem is ever suspected in the intercom, switch
to “ISO” mode or remove power to unit. In this mode you will still be
able to transmit and receive on the aircraft radio(s) from the pilot’s
position. If the radio does not provide sidetone, then the pilot will
not hear his voice in the “FAIL-SAFE” or “ISO” mode.