Kenwood TKR-740 Service Manual page 73

TKR-740
RX UNIT
Item
11.RA Output 1) Connect the SSG to RX IN, then select the
Level channel that the user w ill use (Wide)
Adjust M OD: 1kHz
(Wide) DEV : 2.4kHz
SSG : 501µV (–53dBm)
(Narrow ) 2) connect the SSG to RX IN, then select the
channel that the user w ill use (Narrow )
M OD: 1kHz
DEV : 1.5kHz
SSG : 501µV (–53dBm)
12.RRA Output 1) Connect the SSG to RX IN, then select the
Level channel that the user w ill use (Wide)
Adjust M OD: 1kHz
(Wide) DEV : 2.4kHz
SSG : 501µV (–53dBm)
(Narrow ) 2) connect the SSG to RX IN, then select the
channel that the user w ill use (Narrow )
M OD: 1kHz
DEV : 1.5kHz
SSG : 501µV (–53dBm)
13.Voting 1) CH4 (Center Frequency)
Pilot Tone Voting Pilot Tone : 1950Hz
Adjust SSG : OFF
(Wide)
(Narrow ) 1) CH10 (Center Frequency)
Voting Pilot Tone : 1950Hz
SSG : OFF
TX UNIT
Item
14.TX Lock 1) CH3 (TX A Hi)
Voltage 2) CH1 (TX A Lo)
3) CH6 (TX B Hi)
4) CH4 (TX B Lo)
15.RX Ref Connect a frequency counter to CN102,
Check then measure the frequency.
1) CH2
16.EXT • Connect a frequency counter to CN102,
Ref check then measure the frequency.
• Connect a SSG to EXT REF IN.
1) CH2
SSG :10M Hz
70.7mV (–10dBm)
M OD : OFF
2) frequency=10M Hz ± 10ppm
74
ADJUSTMENT
Condition
equipment
Condition
equipment
f.counter
f.counter
M easurement
Test
Unit Terminal Unit Parts
SSG RX IN
AFVM CONTROL I/O
RA Terminal
(pin 11)
600Ω Load
SSG RX IN
AFVM REM T I/O
Remote RA
Terminal
(pin 1)
600Ω Load
AFVM CONTROL I/O
RA Terminal
(pin 11)
M easurement
Test
Unit Terminal Unit Parts
DVM TX CV TX
A/3 A/3
CN102
SSG
Adjustment
Specifications/
M ethod
PC ADJ
400mV ± 20mV
PC ADJ
400mV ± 20mV
PC ADJ
400mV ± 20mV
Adjustment
Specifications/
M ethod
TC1 4.5V ADJ ± 0.1V
Check 1V or more
TC2 4.5V ADJ ± 0.1V
Check 1V or more
Check 20M Hz± 1ppm
Check 20M Hz
20M Hz± 10ppm
Remarks
Remarks