Receiver Adjustment - Icom IC-T81E Service Manual

5-3 RECEIVER ADJUSTMENT

The following adjustment must be performed at "ADJUSTMENT MODE".
ADJUSTMENT ADJUSTMENT CONDITION
50 MHz
1 • Displayed frequency :
SENSITIVITY
50.000 MHz
• Connect an SSG to the antenna
connector and a SINAD meter
with an 8 Ω load to the [SP] jack.
• Set an SSG as :
Level
Deviation
Modulation
• Receiving
2 • Displayed frequency :
54.000 MHz
• Receiving
WFM
1 • Displayed frequency :
SENSITIVITY
76.000 MHz [SEA], [USA-1]
88.000 MHz
[EUR], [UK], [ITA], [AUS]
• Set an SSG as :
Level
Deviation
Modulation
• Receiving
2 • Displayed frequency :
107.000 MHz
• Receiving
AM
1 • Displayed frequency :
SENSITIVITY
108.000 MHz
• Set an SSG as :
Frequency
Level
Modulation
Mod. depth
• Receiving
2 • Displayed frequency :
135.980 MHz
• Set an SSG as :
Frequency
• Receiving
VHF
1 • Displayed frequency :
SENSITIVITY
136.000 MHz
• Set an SSG as :
Level
Deviation
Modulation
• Receiving
2 • Displayed frequency :
160.000 MHz
• Receiving
*This output level of the standard signal generator (SSG) is indicated as SSG's open circuit.
UNIT
LOGIC
: 1 µV (–107 dBm)
*
: ± 3.5 kHz
: 1 kHz
[EUR], [UK], [ITA]
LOGIC
: 3.2 µV
*
(–97 dBm)
: ± 52.5 kHz
: 1 kHz
LOGIC
: 108.000 MHz
: 1.0 µV
* (AM)
(–107 dBm)
: 1 kHz
: 30 %
: 135.980 MHz
LOGIC
: 3.2 µV
*
(–97 dBm)
: ± 3.5 kHz
: 1 kHz
MEASUREMENT
LOCATION
Connect a multime- Maximum voltage
ter to check point
SD.
Connect a multime- Maximum voltage
ter to check point
SD.
Connect a multime- Maximum voltage
ter to check point
SD.
Connect a multime- Maximum voltage
ter to check point
SD.
5 - 4
ADJUSTMENT
POINT
VALUE
UNIT ADJUST
Top
panel
Top
panel
Top
panel
Top
panel
[DIAL]
[DIAL]
[DIAL]
[DIAL]