Icom IC-R75, Руководство по обслуживанию

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EXT SP JACK
Noise blanker check point after apply the noise signal
Noise blanker adjustment before apply the noise signal
R736
• MAIN UNIT
CP731
Noise blanker check point before apply the noise signal
• Noise blanker adjustment after apply the noise signal
• Pre-set to center before apply the noise signal
L731
L732
RECEIVER ADJUSTMENTS (CONTINUED)
NOISE
BLANKER
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
• Displayed frequency
: 14.10000 MHz
• Mode : USB
• Noise Blanker : OFF
• PREAMP1. : ON
• Set an SSG as
Frequency : 14.10000 MHz
Level : 18 µV*
(25 dBµ)
Modulation : OFF
• Apply the following signal to the
[ANT1] connector
MAIN
Rear
Panel
Connect the oscillo-
scope to the check
point CP731.
Connect the oscillo-
scope to the [EXT
SP] jack with an 8
Ω
load.
Pre-set to center
Minimun voltage
Noise is blanked
when the [NB] switch
is ON.
MAIN
MAIN
R736
L731,
L732
R736
*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.
1 msec.
100 msec.