Pipistrel Virus SW 121, Pilot Operating Handbook

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7-31
Virus SW 121
Pilot Operating Handbook
POH-121-00-40-001
PAGE REV. 0
PAGE
SECTION 7
AIRPLANE DESCRIPTION
APPROVED
The Garmin GTR 225 or GNC 255 (optional) is designated as COM. COM
provides transceiver active and standby frequency indication, frequency
memory storage, and knob operated frequency selection. The COM trans-
ceiver provides either 760-channel (25 kHz spacing) or 2280-channel (8.33
kHz spacing) operation in a frequency range from 118.000 to 136.975 MHz.
The COM antenna is located on top of fuselage behind the cabin. 12 VDC
for COM transceiver operation is controlled through the Avionics Switch and
supplied through the COM circuit breaker on the Avionics Bus.
7.15.2 NAVIGATION (NAV) TRANSCEIVER (OPTION)
Refer to Supplement 9-S2.
7.15.3 TRANSPONDER
The airplane is equipped with a single Garmin GTX 328 ATC Mode S (iden-
tification and altitude) transponder with squawk capability. The transponder
system consists of the integrated receiver/transmitter control unit, an anten-
na, and an altitude encoder. The receiver/ transmitter receives interrogations
from a ground-based secondary radar transmitter and then transmits to the
interrogating Air Traffic Control Center. Digitized altitude information, pro-
vided by the altitude encoder, is plumbed into the airplane static system.
The transponder and integrated controls are mounted in the center con-
sole. The transponder control provides active code display, code selection,
IDENT button, and test functions. A FUNC (function) key allows for selection
of pressure altitude, flight time, count-up timer and countdown timer modes.
The display is daylight readable and dimming is operator controlled through
the INST(instrument) lights control on the instrument panel bolster. The tran-
sponder antenna is mounted on the underside of the fuselage just aft of the
firewall. 12 VDC for transponder operation is controlled through the Avionics
Switch. 12 VDC for receiver, transmitter, and altitude encoder operation is
supplied through the XPDR circuit breaker on the Avionics Bus.
7.15.4 AUDIO SYSTEM
The airplane is equipped with a VOX intercom system as part of the COM
unit. A separate designated intercom ON/OFF switch is provided below the
Transponder on the central part of the instrument panel.