Icom IC-F2721, Руководство по обслуживанию

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SOFTWARE ADJUSTMENT (continued)
• Select an operation using [
↑
] / [
↓
] keys, then set specifi ed value using [
←
] / [
→
] keys on the connected computer keyboard.
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
UNIT LOCATION
NOTE:
Adjust all the adjustment items as follows throughly in sequence.
RX
SENSITIVITY
[BPF T1]
[BPF T2] 1 • Operating CH : CH 8 [L]
CH 1 [H]
• Connect the SSG to the antenna connec-
tor and set as:
Frequency : 435.000 MHz [L]
450.000 MHz [H]
Level : 10 µV* (–87 dBm)
Modulation : 1 kHz
Deviation :
±
3.5 kHz
• Receiving
PC
screen
Connect the SINAD meter with
a 4
Ω
load to the [EXT SP] jack.
Minimum distortion
level
CONVENIENT:
The BPF T1, BPF T2 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, T2 to peak levels.
or
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.
Digital RSSI
[Dig RSSI]
(IC-F2721D/
F2821D only) 1 • Operating CH : CH 3
• Connect the SSG to the antenna connec-
tor and set as:
Frequency : 400.000 MHz [L]
450.000 MHz [H]
Level : 0.16 µV* (–123 dBm)
Modulation : OFF
• Receiving
Push the [ENTER] key on the connected computer's keyboard
to set "Dig RSSI" level.
S-METER
[RSSI] 1 • Operating CH : CH 1
• Connect the SSG to the antenna connec-
tor and set as:
Frequency : 400.000 MHz [L]
450.000 MHz [H]
Level : 14 µV* (–84 dBm)
Modulation : OFF
• Receiving
Push the [ENTER] key on the connected computer's keyboard
to set "S3" level.
2 • Set the SSG as:
Level
: 0.45 µV* (–114 dBm)
• Receiving
Push the [ENTER] key on the connected computer's keyboard
to set "S1" level.
SQUELCH
LEVEL
[SQL] 1 • Operating CH. : CH 11 [L]
CH 2 [H]
• Connect the SSG to the antenna connec-
tor and set as:
Frequency : 435.000 MHz
450.000 MHz
Level : 0.18 µV* (–122 dBm)
Modulation : OFF
• Receiving
Rear
panel
Connect speaker to the [EXT
SP] jack. Set SQL level to
close squelch.
Then set SQL level
at the point where
the audio signals
just appears.
*The output level of the standard signal generator (SSG) is indicated as the SSG's open circuit.
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