Receiver Adjustment - Icom IC-2GA Service Manual

6
-
2
RECEIVER
ADJUSTMENT
r
CONMCmN
UKAIKNI
1C6T INSTRUMENTS
(1}
AC
POWER
SUPPLY
+
Output v^ihagB
r
\3.Z
V DC
*
Ourrqnl capacity
r
3
A
or
mpng
12}
STANDARD
SlGf^AL GENEI^
ATOR
ISSO)
* Frequancy
range
i
C.l
-- ISO
MHz
*
Output lev«l
:
-127
—
17
dBm
|0.1
pV-3Z mV)
(3:}
DISTORTION
METER
* Frequent^ range
:
1
]<Hk±l3
Ht
*
MBaaiJiing ranga
i
1-^100%
(4}
EXTERNAL SPEAKER
* Impedance
:ao
IS}
DC VOLTMETER
*
Input
impadanoft
:
SO
kfVDC
or
beffler
AiMUSTMENT OONOrnOMS
MEASUffiMEirr
LOCATION
NOTE:
Whan
the
cansitivlly i£
batter than
^V |i£
dS
SiNADI
on
all
fnaquanplas, the fpllowlng
sdnSililvity
adjustment
ie
unnacasearv. Skip to the
$/RF
leval
indicator
adjustment
{bdlOw}.
ACJUS1MENT
KNNT
AlUUISTMENT
SENSITIVITY
Peek vpitege
US,,
us, L7,
LB, l»,
Lie
Connect
tha
voKmater
to J2,
pin
7,
Sida
panel
Connect tha
distortion
mater
to ihs ixT.
SR JACK
with
an
SO
load.
Minimum
distortion
Frequency:
1
4S-00 MHiz
a Rpcaiving
*
Apply an RF
signal to tbe
ANTE
NN A
CONNECTOR.
Fraqvency
;
14S.D0
MHz
Leual
:
-H9dBm|0,2SuV)
Modulation
:
1
kHz
Daviation
:
±3.5 KhU
aSqualCh
conlrol:
fneximum
caunlar-
dockwlsB
Sama
as abOva,
R2B
Top
panel
FUNCTION DISPLAY
Two
bars
SrftF
LEVEL
INDICATOR
* Apply an RF
signal 10
tha
ANTENNA
CONNECTOR;
Laval
:
-ini
dBm
12.0
pvj
Modulation
:
T
kHz
Davration
i
±3.5 kHz
RF UNIT
^
SENSITIVITY
,
ADJUSTMENT
L5
16
SENSmViTY
ADJUSTMENT
L7
LS
J7j pin 7
&RF
LEVEL
INDICATOR
ADJUSTMENT
R2S
SfflF
LEVEL
INDICATOR AChJUSTMENT
DC
VOLTMETER
STANIJARD
SIGNAL
GENERATOR
to
EXT.
SP
JACK
tp J2,
pin 7
f
to
ANTENNA
CONNECTOR
TRANSCEIVER
tP
BATTERY
TERMINAL
To
separate tha
RF UNIT
from tha
MAIN
UNIT, eaa
the
diagram
on
p.
6-1
[rald-out|.
6-2