Icom IC-R3 Service Manual

5 - 5
5-3 RECEIVER ADJUSTMENTS
The following adjustment must be peformed at the “ADJUSTMENT MODE”.
The “S-METER” adjustment must be performed after “RECEIVER SENSITIVITY ADJUSTMENT”.
RECEIVER
SENSITIVITY
S-METER
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
3
1
2
• Displayed frequency :
(TL ch) 30.100 MHz
• Connect an SSG to the antenna
connector and set as:
Level : 1 µV
* (–107 dBm)
Modulation : OFF
• Receiving
• Displayed frequency :
(TL ch) 64.900 MHz
• Connect an SSG to the antenna
connector and set as:
Level : 1 µV
* (–107 dBm)
Modulation : OFF
• Receiving
• Displayed frequency :
(SM ch) 1.620 MHz
• Mode : FM
• Connect an SSG to the antenna
connector and set as :
Level :
0.63 µV* (–111 dBm)
Modulation : OFF
• Receiving
LOGIC Connect the digital
multi-meter to the
check point SD.
Maximum voltage Top
panel
[DIAL]
• Same adjustments as step 1–2 for following frequencies :
65 MHz (TL ch) 65.100 MHz
(TH ch) 107.900 MHz
108 MHz (TL ch) 108.100 MHz
(TH ch) 173.900 MHz
174 MHz (TL ch) 174.100 MHz
(TH ch) 224.900 MHz
330 MHz (TL ch) 330.100 MHz
(TH ch) 469.900 MHz
470 MHz (TL ch) 470.100 MHz
(TH ch) 599.900 MHz
600 MHz (TL ch) 600.100 MHz
(TH ch) 799.900 MHz
NOTE: DO NOT change the SSG output level.
• Push the [MODE] key, and verify that
S-Meter shows S4 (3 dots).
• Same adjustments as step 1 for following frequencies and SSG’S output level :
S-Meter Adj. Freq.
6.500 MHz (SM ch)
15.020 MHz (SM ch)
51.100 MHz (SM ch)
107.980 MHz (SM ch)
159.980 MHz (SM ch)
174.020 MHz (SM ch)
279.960 MHz (SM ch)
330.020 MHz (SM ch)
500.020 MHz (SM ch)
670.020 MHz (SM ch)
SSG Level
0.50 µV
* (–113 dBm)
0.63 µV* (–111 dBm)
0.50 µV* (–113 dBm)
0.63 µV* (–111 dBm)
0.63 µV* (–111 dBm)
0.63 µV* (–111 dBm)
0.63 µV* (–111 dBm)
0.63 µV* (–111 dBm)
0.63 µV* (–111 dBm)
0.63 µV* (–111 dBm)
*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.
S-Meter Adj. Freq.
800.020 MHz (SM ch)
1230.050 MHz (SM ch)
1427.980 MHz (SM ch)
1450.980 MHz (SM ch)
1501.020 MHz (SM ch)
1600.020 MHz (SM ch)
1666.100 MHz (SM ch)
1850.200 MHz (SM ch)
1961.020 MHz (SM ch)
2110.020 MHz (SM ch)
SSG Level
1 µV
* (–107 dBm)
0.56 µV* (–112 dBm)
0.79 µV* (–109 dBm)
0.79 µV* (–109 dBm)
0.50 µV* (–113 dBm)
0.63 µV* (–111 dBm)
0.79 µV* (–109 dBm)
0.79 µV* (–109 dBm)
1.4 µV* (104 dBm)
0.79 µV* (–109 dBm)

Icom IC-R3 Specifications

General

Brand	Icom
Model	IC-R3
Category	Receiver
Language	English