Icom IC-R7100 Service Manual page 49

RECEIVER ADJUSTMENT
(Co nllnued)
-
MEASUREMENT
ADJUSTMENT
POINT
ADJUSTMENT ADJUSTMENT CONDITIONS VALUE
UNIT LOCATION UN IT ADJ UST
1 st IF 1
• Displayed Irequency: 250.0000 MHz
RF Connecl the
oe
9 V RF R105
NOTCH - Mode
: FM voltmeter 10 1 C3
pin 1.
2
• Displayed Irequency: 511 .0000 MHz
13-15 V
Verify
3 • Displayed frequency: 249.0000 MHz 9V Rl 04
4 • Displayed lrequency: 25.0000 MHz 4-5V Verify
5 • Displayed frequency : 800.0000 MHz
Senete r
Maximum valu e
RF L46. L47
- Mode
: FM
(FIL 1)
• Conneet Ihe SSG 10 the IANT]
connector and set as :
Level : 32 mV-(-17 dBm)
Modulation : QFF
6 • Displayed frequency : 778.6000 MHz
Minimum vajue
L67. L68
• Keep the SSG output trequenc y, (less Ihan 57)
level and modulation.
7 • Displayed lrequency: 37 8.6000 MHz
L5l
• Con neet t he SSG 10 the [A NT]
conn ector and set as :
tr equency : 400 .0000 MHz
TOTALGAlN 1 • Disptayed Irequencv: 150 .0000 MHz
M AIN Conneet t he
De
2.5V
-
MAIN
R1B7
• Mode
: USB voltmeter to the
• Con neet th e $SG 1 0 th e [ANT)
souree ot
022.
c onnec tor and set as :
Level : OFF
2 • Conneet the SSG to t he [ANn Rear Connec t the AC
- 20 dB of level down R297
connecto r and set as : panel
millivoltmeter to the when th e SSG is
Level : 50 ~V - ( -73 dBm) [EXT SP] jac k w ith an turned OFF.
e Oload.
S-METER
1 - Displayed frequency:
150.0000
MHz Rear
S enete r S9 + 60 dB MAIN R64
• Mode
: FM
panel
' ''~ 'i-
• Connect the SSG to the [ANn
c onnector and set a s :
•
Level : 50 mV- (-13 dBm)
Modulatlon : OFF
2
• Connect Ihe SSG to th e [ANn S9 R60
connec tor end set as:
-
Level : 50
~V -
( -73 dBm)
. -
-
• I , •
I "
.....
3 - Mode : W FM
S9+60 dB A1S 1
- Connect t he SSG to tne [ANn
•
connector and set as :
Level : 50 mV' ( - 13 dBm)
4
- Connecl the SSG to th e [ANn
S1 R308
connector and set as :
\
..
"':":'
. -
Le vel : 1.4
~V-
( - 104 dBm)
. -
•
"
NOTE : Repeat steps 1- 4 (several times).
*
Th is output lev el c t the standard slgna l generator (SSG) is lndicated as SSG' s open circu it.
6 -6