Icom IC-F4029SDR, Service Manual

Page: 31 / 48

5 - 6
5-4 RECEIVE ADJUSTMENT
Select an adjustment item using [
↑
] / [
↓
] keys, then set to the specifi ed value using [
←
] / [
→
] keys on the connected PC’s keyboard.
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
RECEIVE
SENSITIVITY
[BPF (T1)]
[BPF (T2)] NOTE:
“RECEIVE SENSITIVITY” must be adjusted before “S-METER.” Otherwise, “S-METER” will not be
adjusted properly.
1 • Channel : 1-5 [MIC/SP]
jack
Connect the SINAD meter
with an 8
Ω
load to the JIG
cable.
Minimum distortion
level
• Connect the SSG to RF connector (PA-C
UNIT; J701) and set as;
Frequency
Level
Modulation
Deviation
• Receiving : 400.000 MHz
: +20 dBµ
†
(–87 dBm)
: 1 kHz
: ±3.5 kHz
CONVENIENT:
The “RECEIVE SENSITIVITY” can be adjusted automatically.
1: Put the cursor on “BPF ALL,” then push [Enter] key.
2: The connected PC tunes BPF’s to peak levels automatically.
S-METER
[RSSI] 1 • Channel : 1-1 Push the [Enter] key on the connected PC’s keyboard to set “S3”
level.
• Connect the SSG to RF connector (PA-C
UNIT; J701) and set as;
Frequency
Level
Modulation
Deviation
• Receiving : 466.006250 MHz
: +23 dBµ
†
(–84 dBm)
: 1 kHz
:
±
3.5 kHz
2 • Set the SSG as;
Level
• Receiving
: –7dBµ
†
(–114 dBm)
Push the [Enter] key on the connected PC’s keyboard to set “S1”
level.
SQUELCH
[SQL] 1 • Channel : 1-1 [MIC/SP]
jack
Connect an 8
Ω
speaker to
the JIG cable.
Set the [SQL] to the
value that the audio
signals just appears.
• Close the squelch by adjusting the value of
[SQL] item on the CS-F4029 ADJ’s screen.
• Connect the SSG to RF connector (PA-C
UNIT; J701) and set as;
Frequency
Level
Modulation
Deviation
• Receiving : 466.006250 MHz
: –14 dBµ
†
(–121 dBm)
: 1 kHz
:
±
3.5 kHz
†;
The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.