Icom IC-400PRO Service Manual page 17

SOFTWARE ADJUSTMENT – continued
Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
ADJUSTMENT
RX 1 • Operating freq. : 450.000 MHz
SENSITIVITY • IF bandwidth
[BPF T1], • Connect a standard signal generator to
[BPF T2] the antenna connector and set as:
Frequency
Level
Modulation
Deviation
• Receiving
CONVENIENT:
The BPF T1–BPF T2 can be adjusted automatically.
q-1: Set the cursor to "BPF ALL" on the adjustment program and then push [ENTER] key.
q-2: The connected PC tunes BPF T1, BPF T2 to peak levels.
w-1: Set the cursor to BPF T1 or BPF T2 as desired.
w-2: Push [ENTER] key to start tuning.
w-3: Repeat w-1 and w-2 to perform additional BPF tuning.
SQUELCH 1
• Operating freq. : 475.000 MHz
LEVEL
• IF bandwidth
[SQL]
• Connect an SSG to the antenna con-
nector and set as:
Frequency
Level
Modulation
Deviation
• Receiving
S-METER 1
• Operating freq. : 450.000 MHz
[S-METER]
• IF bandwidth
(S3 LEVEL)
• Connect an SSG to the antenna con-
nector and set as:
Frequency
Level
Modulation
Deviation
• Receiving
(S1 LEVEL) 2
• Set an SSG as:
Level
• Receiving
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
ADJUSTMENT CONDITION
: Wide
: 450.000 MHz
: 10 µV* (–87 dBm)
: 1 kHz
: ±3.5 kHz
or
: Narrow
: 475.000 MHz
: 0.2 µV* (–121 dBm)
: 1 kHz
: ±1.75 kHz
: Wide
: 450.000 MHz
: 14 µV* (–84 dBm)
: 1 kHz
: ±3.5 kHz
: 0.45 µV* (–114 dBm)
MEASUREMENT
UNIT LOCATION
MAIN Connect a SINAD meter with a
4 Ω load to the external [SP]
jack.
Rear Connect a SINAD meter with a
4 Ω load to the external [SP]
panel
jack.
• Adjusting S3 and S1's S-meter level automatically when
push the return key on the key board.
5 - 6
VALUE
Minimum distortion
level
Set "SQL level" to
close squelch.
Then set "SQL level"
at the point where
the audio signals
just appears.