Garmin AT
Rev --
10-16
GX Service Manual
© 2004 Garmin AT
7t
h Orde
r
Ely
p
tic F
u
n
ctio
n
LPF
Pr
e-
Dri
v
er
Am
p
Ante
nna
Sw
itch,
R
F
AGC
A
Pow
er
Am
p
Dri
v
er
Am
p
R
R
Tx LO
(118.
00 to
136.
975 MHz
)
Rx/Tx
Audio
Modula
tion
S
Figure 10-11. VHF Comm Transmitter Block Diagram