Receive Adjustment - Icom IC-F4029SDR Service Manual

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
RECEIVE NOTE: "RECEIVE SENSITIVITY" must be adjusted before "S-METER." Otherwise, "S-METER" will not be
SENSITIVITY
adjusted properly.
[BPF (T1)]
1 • Channel
[BPF (T2)]
• Connect the SSG to RF connector (PA-C
UNIT; J701) and set as;
Frequency
Level
Modulation
Deviation
• Receiving
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 1 • Channel
• Connect the SSG to RF connector (PA-C
[RSSI]
UNIT; J701) and set as;
Frequency
Level
Modulation
Deviation
• Receiving
2
• Set the SSG as;
Level
• Receiving
SQUELCH 1 • Channel
• Close the squelch by adjusting the value of
[SQL]
[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
†;
The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
UNIT
: 1-5 [MIC/SP]
: 400.000 MHz
†
: +20 dBµ (–87 dBm)
: 1 kHz
: ±3.5 kHz
: 1-1 Push the [Enter] key on the connected PC's keyboard to set "S3"
level.
: 466.006250 MHz
†
: +23 dBµ (–84 dBm)
: 1 kHz
: ±3.5 kHz
Push the [Enter] key on the connected PC's keyboard to set "S1"
†
: –7dBµ (–114 dBm) level.
: 1-1 [MIC/SP]
: 466.006250 MHz
†
: –14 dBµ (–121 dBm)
: 1 kHz
: ±3.5 kHz
5 - 6
MEASUREMENT
LOCATION
Connect the SINAD meter
with an 8 Ω load to the JIG
jack
cable.
Connect an 8 Ω speaker to
jack
the JIG cable.
VALUE
Minimum distortion
level
Set the [SQL] to the
value that the audio
signals just appears.