ICOM IC F121S Manual De Usuario

5 - 6

*The output level of the standard signal generator (SSG) is indicated as the SSG’s open circuit.

Select an operation using [

↑] / [↓] keys, then set specified value using [←] / [→] keys on the connected computer keyboard.

Minimum distortion

level

Set  “SQL level” to
close squelch.

Then set “SQL level”
at the point where
the audio signals
just appears.

1

1

• Operating freq. : 136.000 MHz
• IF bandwidth

: Wide

• Connect a standard signal generator to

the antenna connector and set as:

Frequency

: 136.000 MHz

Level

: 10 µV* (–87 dBm)

Modulation

: 1 kHz

Deviation

: ±3.5 kHz

[N/W]

±2.8 kHz

[N/M]

• Receiving

• Operating freq. : 155.000 MHz
• IF bandwidth

: Narrow

• Connect an SSG to the antenna con-

nector and set as:

Frequency

: 155.000 MHz

Level

: 0.2 µV* (–121 dBm)

Modulation

: 1 kHz

Deviation

: ±1.75 kHz

• Receiving

RX
SENSITIVITY
[BPF T1], 
[BPF T2]

SQUELCH
LEVEL
[SQL]

MAIN

Rear

panel

Connect a SINAD meter with a
4

Ω load to the external [SP]

jack.

Connect a SINAD meter with a
4

Ω load to the external [SP]

jack.

The BPF T1–BPF T2 can be adjusted automatically.
q-1: Set the cursol 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.

or

w-1: Set the cursol 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.