Icom IC-F610, Service Manual

Page: 21 / 40

5 - 8
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
RX
SENSITIVITY
[BPF T1]–
[BPF T4] 1 • Operating CH : CH1 Rear
panel
Connect a SINAD meter with
a 4
Ω
load to the external
[SP] jack.
Minimum distortion
level
• Connect an SSG to the antenna connector
and set as:
Frequency
Level
Modulation
Deviation
• Receiving
: 400.000 MHz [L]
440.000 MHz [M]
480.000 MHz [H]
: 10 µV* (–87 dBm)
: 1 kHz
:
±
3.5 kHz [W/N]
±
2.8 kHz [M/N]
CONVENIENT:
The BPF T1– BPF T4 can be adjustment automatically.
q
-1: Set the cursor to "BPF ALL" and then push [ENTER] key.
q
-2: The connected PC tunes BPF T1–BPF T4 to peak levels.
or
w
-1: Set the cursor to one of BPF T1, T2, T3 or T4 as desired.
w
-2: Push [ENTER] key to start tuning.
w
-3: Repeat
w
-1 and
w
-2 to perform additional BPF tuning.
S-METER
[S-METER]
( [ R S S I ] f o r
[ M P T ] a n d
[LTR])
1
• Operating CH : CH1 • Push the [ENTER] key on the connected computer's key-
board to set "S3" level.
• Push the [ENTER] key on the connected computer's key-
board to set "L2" level. (for [MPT] and [LTR] )
• Connect an SSG to the antenna connector
and set as:
Frequency
Level
Modulation
Deviation
• Receiving
: 400.000 MHz [L]
440.000 MHz [M]
480.000 MHz [H]
: 14 µV* (–84 dBm)
: 1 kHz
:
±
3.5 kHz [W/N]
±
2.8 kHz [M/N]
2
Set an SSG as:
Level
Deviation
• Receiving
: 0.45 µV* (–114 dBm)
:
±
3.5 kHz [W/N]
±
2.8 kHz [M/N]
• Push the [ENTER] key on the connected computer's key-
board to set "S1" level.
• Push the [ENTER] key on the connected computer's key-
board to set "L0" level. (for [MPT] and [LTR] version)
SQUELCH
LEVEL
[SQL] 1 • Operating CH : CH5 Rear
panel
Connect a speaker to the
external [SP] jack. S e t S Q L l eve l t o
close squelch.
Then set SQL level
at the point where
the audio signals
just appears.
• Connect an SSG to the antenna connector
and set as:
Frequency
Level
Modulation
Deviation
• Receiving
: 415.000 MHz [L]
465.000 MHz [M]
500.000 MHz [H]
: 0.2 µV* (–121 dBm)
: 1 kHz
:
±
1.75 kHz
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
SOFTWARE ADJUSTMENT (RECEIVING)
• Select an operation using [
↑
] / [
↓
] keys, then set specifi ed 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.