Icom IC-7200 [50/104] Preamp and attenuator

Icom IC-7200 [50/104] Preamp and attenuator
Preamp and attenuator
The preamp amplifies received signals in the re-
ceiver input (front end) circuit to improve the S/N
ratio and sensitivity. Turn this function ON when re-
ceiving weak signals.
The attenuator prevents very strong signals near the
desired frequency, such as nearby broadcast sta-
tions or very strong amateur signals, from causing
distortion of a desired signal.
Push
P.AMP
ATT
momentarily to turn the preamp ON
and OFF; push and hold for 1 sec. to turn the
attenuator ON.
appears when the preamp is ON;
appears when the 20 dB attenuator is ON.
Only one of these functions can be activated at a time.
MODE
TUNER
TS
FILTER
SPCH
V/M
A/B
SPLIT
M-CL
SCAN
SET
ATT
P
.
AMP
COMP
VOX
MNF
RIT
1
2
3
4
5 6
7
8
0
50
28
1814
10
21
24
=
7
3.5
1.8
F-INP
M-CH/RIT
ENT
BAND
GENE
9
.
AGC
MW
ANF
METER
NR
NB
Either “ ” or
“ ” appears.
momentarily
momentarily 1 sec.
: Push and hold for 1 sec.
: Push momentarily
AGC function
The AGC (auto gain control) controls receiver gain to
produce a constant audio output level even when the
received signal strength is varied by fading, etc.
D AGC time constant selection
q Push
MODE
several times to select the desired
mode.
w
Push
AGC
once or twice to select AGC fast or
AGC slow.
F.AGCappears for AGC fast; no indicator for AGC
slow is selected, respectively.
e Push and hold
AGC
for 1 sec. to turn the AGC
OFF.
AGC-OFF appears for AGC OFF.
MODE
TUNER
TS
FILTER
SPCH
V/M
A/B
SPLIT
M-CL
SCAN
SET
ATT
P
.
AMP
COMP
VOX
MNF
RIT
1
2
3
4
5 6
7
8
0
50
28
1814
10
21
24
=
7
3.5
1.8
F-INP
M-CH/RIT
ENT
BAND
GENE
9
.
AGC
MW
ANF
METER
NR
NB
45
5
FUNCTIONS FOR RECEIVE

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