Garmin SL40 - Microphone Input; Modulation Capability; Intercom Performance; Control Inputs

Specifications
Microphone input
. Trvo inputs, standard carbon
or
dynamic
mic with
integrated
preamp providing
minimum 70mv
rms
into 10000 load
Modulation capability
tl5% with lOOrnv to
1000mv
rms microphone input
at 1000 Hz
Audio
fiequency
distortion..
...
<
l0% at
tt5% niodulation at
350
to
2500
Hz
Audio
fiequency
rcsponsc
nrodulation
Carricr
noisc
lcvcl
>
3-5 dB down
Sidetone
output.......
up to 2l30nrW
into
100Q, l20mW into
500fJ
Duty
cycle
100"/o
Stuck mic tintc-out..............
... 3-5 second timc-out. rcverts
to reccive
IxrnRcoM PERFoRMANCE
Microphonc
input
.
Two inputs,
standard carbon
or dynarnic
nric
with
intcgratcd
prearnp providing
minimum
70mv
rms
into 1000() load
IJeadphonc audio
output 1cvc1..........
..... .2u0 mW into
100O, 120
nrW
into 500f)
ACC charactcristic
output vuries
<
3 dB
with
input
of
lOOnrv rnrs
to
l000rnv
rnrs
Cox'rnoL
INPUTS
Transnrit key............
Input
pullcd
low
to
ground
to
errable tlrc
transmitter
Intercont
select
.....
Input
pullcd
low
to
ground
to
cnable thc
intcrcom
function
ANrnNnA
REeUTREMENTS
The SL40 requires an
antL-nna mc-eting
the fbllowing spccifications.
Standard
-50f)
vcrtically
polarized
antcnna
witlr
a VSWR
<
2.5:1.
SBruaI- INrnRpacn
RS-232.....
Deflncd
in
Appendix
E
-
Serial Intert-ace
Specifications
SL40
Insta I
lation Manual
17