Icom IC-756PRO Service Manual

*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
4 - 4
4-3 RECEIVER ADJUSTMENTS
RX PEAK
MIXER
BALANCE
FM
DISTORTION
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
3
1
2
1
2
• Display frequency: 14.100000 MHz
• Mode : USB
• Filter : 2.4 kHz
• [P.AMP] : P.AMP1
• [ATT] : OFF
• Connect an SSG to [ANT1] con-
nector and set as :
Frequency : 14.101500 MHz
Level : 10 µV* (–87 dBm)
Modulation: 1 kHz/±7.5 kHz dev.
• Receiving
• [DUAL WATCH] : ON
• Sub display freq. : 14.100000 MHz
• Mode : USB
• [BAL] : Max. CW
• Set an SSG as :
Level : 10 µV* (–87 dBm)
• Receiving
• Display frequency: 14.100000 MHz
• Mode : USB
• [DUAL WATCH] : OFF
• Set following selections, controls
and functions as :
Filter : 2.4 kHz, [ATT] : OFF
[AGC]: MID , [BAL] : Center
PBT1 : Center , PBT2 : Center
[NB] : OFF , [RIT] : OFF
[P.AMP] : P.AMP1
[RF/SQL] : Center
[ AUTO NOTCH ]: OFF
[ NOTCH ] : Center
[NR] switch : OFF
[NR] level : Max. CCW
[MONITOR] : OFF
• Connect an SSG to [ANT1] con-
nector and set as :
Frequency : 14.101500 MHz
Level : 1 µV* (–107 dBm)
Modulation: OFF
• Receiving
• Display frequency: 0.030000 MHz
• Sub display freq. : 0.030000 MHz
• Mode : USB
• [BAL] : Max. CCW
• Apply no no RF signal to [ANT1]
connector.
• Receiving
• [BAL] : Max. CW
• Receiving
• Display frequency: 14.100000 MHz
• Sub display freq. : 14.100000 MHz
• Mode : FM
• [BAL] : Max. CCW
• Connect an SSG to [ANT1] con-
nector and set as :
Frequency : 14.100000 MHz
Level : 500 µV* (–53 dBm)
Modulation:
1 kHz/±7.5 kHz Dev.
• Receiving
• [BAL] : Max. CW
• Receiving
Rear
panel
Rear
panel
Rear
panel
Connect an AC milli-
volt meter to [EXT
SP] connector with
an 8 Ω load.
Connect an AC milli-
volt meter to [EXT
SP] connector with
an 8 Ω load.
Connect an distortion
meter to [EXT SP]
connector with an
8 Ω load.
Maximum audio output
level
Minimum noise output
level
Minimum distortion
level
RF
MAIN
RF
RF
L513,
L721,
L722,
L943
L613
L111,
L112,
L113
R516
R616
C555
C655

Icom IC-756PRO Specifications

General

Brand	Icom
Model	IC-756PRO
Category	Transceiver
Language	English