6·4 Receiver Adjustment - Icom IC-R7100 Service Manual

6·4 RECEIVER ADJUSTMENT
MEASUREMENT
ADJUSTMENT
POINT
ADJUSTMENT ADJUSTMENT CONDITIONS VALUE
UNIT LOCATION UNIT ADJUST
BANDPASS
1 • Dlsplayed frequencies :
Rear Connee t the Minimum dislortion RF
R90
FILTER 999.0000 MHz. B50.0000 MHz panel
distc rtico meter
10 level
end 7 62.0000 MHz
Ihe (EXT SP] j ack with (A11 ernately adlust a
- M ode
: FM
an 8 0 lead.
c ouple ot times 1 0
• Conn ect tne SSG 10 the [ANT]
cotaln good senslüvity
connect or and set as : batenee on each
Level : 0.5 ~V· ( - , 13 dBrn)
frequency.)
Mcculation : 1 kHz
Deviation
: ± 3.5 kHz
2 • Displayed trequencies :
RB9
761.0000 MHz. 650.0000 MHz
and 51 3.0000 MHz
3 • Displayed frequencies :
R77 . R79
250.0000 MHz. 450.0000 MHz
and 511 .5000 MHz
4 • Displayed trequencle s : R73. R7'
90.0000 MHz. 150.0000 MHz aod
249.0000 MHz
5 • Displayed trequencle s :
R6B. RBB
25.0000 MHz, 55.0000 MHz.
75.0000 MHz and 89.0000 MHz
•
NOTE: nepeet steps 1-5 (severet times).
RECEIVER
1
e
Dlsplayed frequency: 150.0000 MHz
Front
ë-meter
Maximum value
RF L57. L5B
-Mode : WFM
panel
- Conneet the SSG to the [ANT]
connector and set as :
Level : 50 ~V' (- 73 dBm)
Modulation : 1 kHz
Deviat lon
: '50 kHz
2 - Mode : FM
•
MAIN L3. L4
- Connecl the SSG to the [ANT] L5. L6
connector and set as:
LB. L9
Modulation: 1 kHz
•
Devtatlon : 15 kHz
- R297 (MAIN)
: Max. CCW
3 - Connect tne SSG 1 0 tne [ANT] Rear
Connect the AC Maximum audio output L12
connector and set as : panel millivoltmeter 10 the level
Modulation : 1 kHz
[EXT SP] J ack wilh an
Deviatlon : ±3.5 kHz
B 0 lood.
4 - Dispfayed trequency: 150.0000 MHz Front
Seneter
59+60 dB
R64
-Mode : FM panel
' ''~ 7-
- Connect the SSG 10 [ANn
connector and set as :
I "
Level : 50 mV" (-'3 dBrn)
5 - Connec t the SSG 10 the (ANT]
59
R60
connec tor and set as :
.~
Level : 50 ~V' ( -7 3 dBm)
• •
• •
'-.-
•
~
*
Thls output level ct the standard signal generator (SSG) Is indlcated as SSG's open circui t.
.
6-4