Icom IC-F50 Service Manual page 57

SOFTWARE ADJUSTMENT (RECEIVING)
• Select an operation using [↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
• Need to adjust "S-METER ADJUSTMENT" after "RX SENSITIVITY ADJUSTMENT" is adjusted.
Otherwise, "S-METER ADJUSTMENT" will not be adjusted properly.
ADJUSTMENT
RX 1 • Operating CH
SENSITIVITY • Connect a standard signal generator to the
[BPF T1], antenna connector and set as:
[BPF T2] 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 one of BPF T1, T2 as desired.
w-2: Push [ENTER] key to start tuning.
w-3: Repeat w-1 and w-2 to perform additional BPF tuning.
• Operating CH
S-METER 1
[S-METER] • Connect an SSG to the antenna connector
and set as:
Frequency
Level
Modulation
Deviation
• Receiving
• Set an SSG as :
2
Level
Modulation
Deviation
• Receiving
• Operating CH
SQUELCH 1
LEVEL • Connect an SSG to the antenna connector
and set as:
[SQL]
Frequency
Level
Modulation
Deviation
• Receiving
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
ADJUSTMENT CONDITION
: CH3
: 400.000 MHz
450.000 MHz
: 10 µV* (–87 dBm)
: 1 kHz
: ±3.5 kHz
or
: CH3
: 400.000 MHz
450.000 MHz
: 4.5 µV* (–94 dBm)
: 1 kHz
: ±3.5 kHz
: 0.25 µV* (–119 dBm)
: 1 kHz
: ±3.5 kHz
: CH11
: 470.000 MHz
520.000 MHz
: 0.2 µV* (–121 dBm)
: 1 kHz
: ±3.5 kHz
MEASUREMENT
UNIT LOCATION
MAIN Connect a SINAD meter with
an 8 Ω load to the multi con-
nector through the JIG cable
[L] (*OPC-966).
[H]
Push the [ENTER] key on the connected computer's key-
board to set "S6 level".
[L]
[H]
Push the [ENTER] key on the connected computer key-
board to set "S1 level".
Front Internal speaker
panel
[L]
[H]
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.