Beep Adjustment - Icom IC-F310 Service Manual

TRIMMER ADJUSTMENT — continued
Select an operation using [↑] / [↓]keys, then set specified value using [←] / [→] keys on the connected computer keyboard.
ADJUSTMENT
RECEIVE 1 • Operating frequency: (Ch 2)
[BPF T1]–
[BPF T4]
• Connect a standard signal generator to
the antenna connector and set as:
Level
Modulation: 1 kHz
Deviation : ±3.5 kHz (Wide)
• Receiving
CONVENIENT: The BPF T1–BPF T4 can be adjusted automatically.
1 • Operating frequency: (Ch 2)
SQUELCH
LEVEL
[SQL]
• Connect an SSG to the antenna con-
nector and set as
Level
Modulation: OFF
• Receiving
*This output level of a standard signal generator (SSG) is indicated as SSG's open circuit.

5-4 BEEP ADJUSTMENT

ADJUSTMENT ADJUSTMENT CONDITION
BEEP AUDIO 1 • Operating frequency: Any
• Connect an audio generator to
pin 25 (MAIN unit; J2) and set
as:
1 kHz / 550 mV
• Squelch
• Volume level : 1
• Receiving
ADJUSTMENT CONDITION
136.00000 MHz [L-band]
146.00000 MHz [H-band]
: 3.2 µV* (–97 dBm)
±1.75 kHz (Narrow)
q-1 Set each to 0, then push the [F9] key.
(The cursor must be set to the BPF T1 position.)
q-2 The connected PC tunes BPF T1–BPF T4 to peak levels.
w-1 Set the cursor to one of BPF T1, T2, T3 or T4 as desired.
w-2 Push [F8] to start tuning.
w-3 Pepeat w-1 and w-2 to perform additional BPF tuning.
136.00000 MHz [L-band]
146.00000 MHz [H-band]
:
: adjust SSG's level to 8
dB SINAD on the con-
necting SINAD meter
: OPEN
MEASUREMENT
UNIT
Rear Connect a SINAD meter with a 4
Ω load to the external [SP] jack.
panel
or
Rear Connect a SINAD meter with a 4
Ω load to the external [SP] jack.
panel
MEASUREMENT
UNIT LOCATION
Rear Connect an AC mil-
livoltmeter with 4 Ω
panel
load to the [SP]
jack.
5 - 5
LOCATION
Minimum distortion
level
At the point where
noise just appears.
ADJUSTMENT
VALUE
UNIT
62.5 mV FRONT
VALUE
POINT
ADJUST
R60