Icom IC-T7A Service Manual

5-2
RECEIVER
ADJUSTMENT
ADJUSTMENT ADJUSTMENT
CONDITIONS
MEASUREMENT
VALUE
ADJUSTMENT
UNIT
LOCATION
UNIT ADJUST
VHF
SENSITIVITY
1
•
Displayed
frequency: 145.000
MHz
•
Connect
a SSG to the
antenna connector
and set as:
Level
: 1.0 mV*
(
-47
dBm)
Mod.
: 1 kHz
(±3.5
kHz
Dev.)
•
Receiving
2F
Connect a digital
multimeter
or
oscilloscope
to
the
check point
“S”.
Maximum
level
2F Adjust
in
sequence
L53,
L54,
L55
UHF
SENSITIVITY
•
Displayed
frequency:
445.000 MHz (USA version)
435.000 MHz (Other versions)
•
Connect a SSG
to the antenna
connector
and set
as:
Level
: 1 .0 mV*
(
-47
dBm)
Mod. :OFF
•
Receiving
2F Connect
a
digital
multimeter or
oscilloscope
to the
CPI.
1.0 V
2F
LI 02
SQUELCH
LEVEL
1
•
Displayed
frequency: any
•
Connect
an SSG to
the antenna
connector and
set as:
Level :
0.11
pV*(
-126dBm)
Mod.
: 1 kHz
(±3.5
kHz
Dev.)
•
Pre-set
the
R504
to
maximum
CW.
•
Receiving
Spea-
ker
At
the
point where
the
AF signal just
disappears.
2F
R504
S-METER
1
•
Displayed
frequency:
445.000
MHz (USA
version)
435.000
MHz
(Other
versions)
«
Connect an SSG to
the antenna
connector
and
set
as:
Level :
0.5
pV* (-113
dBm)
Mod.
: 1 kHz
(±3.5
kHz
Dev.)
•
Connect a terminator
to the
[EXT SP]
jack.
•
Receiving
Front
panel
Push and hold
the [CALL] key.
2
•
Set an SSG
output level for the
S-meter to
S3
(4
dots).
SSG Output
level
0.32 to
0.79 pV
(
-117
to
-109
dBm)
Verify
*This
output
level of
a standard signal
generator (SSG)
is indicated
as the SSQ’s
open circuit.
•
2F UNIT
5-3

Icom IC-T7A Specifications

General

Brand	Icom
Model	IC-T7A
Category	Transceiver
Language	English