Receiver Adjustment - Icom IC-2710H Service Manual

RECEIVER ADJUSTMENT

5-3
ADJUSTMENT ADJUSTMENT CONDITIONS
VHF 1 •VHF display: 145.000 MHz
• Connect an SSG to the antenna
SENSITIVITY
connector and set as;
Level : 1 mV* ( - 47 dBm)
Mod. : 1.0 kHz ( ± 3.5 kHz Dev.)
•Receiving
2 • UHF display: 145.000 MHz
•Receiving
SQUELCH 1 •VHF display:
LEVEL 146.000 MHz (USA, SEA versions)
145.000 MHz (All other versions)
• Squelch level
• R398
• Connect an SSG to the antenna
connector and set as;
Level : 0.079 µV*( - 129 dBm)
Mod. : 1.0 kHz ( ± 3.5 kHz Dev.)
•Receiving
2 • UHF display:
445.000 MHz (USA version only)
435.000 MHz (ALL other versions)
• Squelch level
• R440
•Receiving
1
S-METER • Connect a JIG to the microphone
connector then turn ON the power.
• Both VHF/UHF displays:
145.000 MHz
• Connect an SSG to the antenna
connector and set as;
Level : 1.0 µV* ( - 107 dBm)
Mod. : 1.0 kHz ( ± 3.5 kHz Dev.)
•Receiving
2 • VHF display:
445.000 MHz (USA version only)
435.000 MHz (All other versions)
•Receiving
3 • UHF display:
445.000 MHz (USA version only)
435.000 MHz (All other versions)
• Set an SSG level as;
1.2 µV* ( - 105.5 dBm)
•Receiving
*This output level of a standard signal generator (SSG) is indicated as the SSG's open circuit.
UNIT
MAIN Connect a DC volt
Sp ea-
ker
: 7 (Use HM-98)
: Max. clockwise
: 7 (Use HM-98)
: Max. clockwise
Front
panel
Front
panel
Front
panel
5 -4
M EASUR EMENT
LOCATION
Maximum DC
meter to the
voltage
CP-SMV.
Connect a DC volt
multimeter to the
CP-SMU.
At the point where MAIN
the AF signal just
appears.
Push and hold the [S. MW] key of
either band, and then push and
hold the [S. MW] key of the other
band.
• Verify that S-meter shows S3
Push and hold the [S. MW] key of
VHF band.
• Verify that S-meter shows S3
Push and hold the [S. MW] key of
UHF band.
• Verify that S-meter shows S3
ADJUSTMENT
VALUE
U N IT ADJUST
MAIN Adjust in
sequence
L48, L49
L50
MAIN Adjust in
sequence
L65, L68
L69, L70
R398
R440
(4 dots) each time.
(4 dots) each time.
(4 dots) each time.