Icom IC-7800

4 - 2
4-2 OSC UNIT ADJUSTMENTS
REFERENCE
OUTPUT
REF IN
OUTPUT
REF OUT
OUTPUT
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
1
2
3
• Set the OSC unit to the external ref-
erence mode on the set mode.
• MAIN display frequency
: 10.000 MHz
• Connect an SSG to J71 on the
OSC unit and set as;
Frequency : 10.000 MHz
Level :
71 mV* (–10 dBm)
Modulation : OFF
• Terminates J73 with 50 Ω.
• Receiving
• Receiving
• Terminates J72 with 50 Ω.
• Receiving
• Set the OSC unit to the internal ref-
erence mode on the set mode.
• Receiving
• Terminates J73 with 50 Ω.
• Receiving
• Terminates J72 with 50 Ω.
• Receiving
OSC
OSC
OSC
Connect an RF volt-
meter to J72.
Connect an RF volt-
meter to J72.
Connect an RF volt-
meter to J73.
Connect an RF volt-
meter to J71.
Connect an RF volt-
meter to J72.
Connect an RF volt-
meter to J73.
Maximum voltage
0 dBm ±3.0 dB
0 dBm ±3.0 dB
–10.0 dBm ±3.0 dB
0 dBm ±3.0 dB
0 dBm ±3.0 dB
OSC
Adjust
repeatedly
L61,
L62
Verify
Verify
Verify
Verify
Verify
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.