Rx Unit (X55-3050-11) - Kenwood TKR-740 Service Manual

TKR-740
RX UNIT
Item
1. Setting 1) VOL : OFF
2) 13.2V External pow er supply
3) POWER : ON
2. RX Lock 1) CH6 (RX B Hi)
Voltage 2) CH4 (RX B Lo)
3) CH3 (RX A Hi)
4) CH1 (RX A Lo)
3. BPF Connect the TG to RX IN, then connect
Adjust CN2 to the spectrum analyzer input.
4. M CF Connect the TG to CN3, then connect
Adjust CN4 to the spectrum analyzer input.
(Wide) 1) CH4
(Narrow ) Connect the TG to CN3, then connect CN5
to the spectrum analyzer input.
1) CH10
5. Discriminator Connect the SSG to RX IN
Adjust 1) CH4
(Wide) M OD: 1kHz
DEV : 2.4kHz
SSG : 501µV (–53dBm)
AF : 0.45V/4Ω
(Narrow ) 1) CH10
M OD: 1kHz
DEV 1.5kHz
SSG : 501µV (–53dBm)
AF : 0.45V/4Ω
6. Sensitivity 1) Connect the SSG to RX IN, then select the
Check channel that the user w ill use (Wide)
(Wide) M OD: 1kHz
DEV : 2.4kHz
SSG : 0.707µV (–110dBm)
AF : 0.45V/4Ω
(Narrow ) 1) Connect the SSG to RX IN, then select the
channel that the user w ill use (Narrow )
M OD: 1kHz
DEV : 1.5kHz
SSG : 0.707µV (–110dBm)
AF : 0.45V/4Ω
72
ADJUSTMENT
Condition
equipment
TG Spectrum
Analyzer
Analyzer
filter : CCITT
filter : CCITT
M easurement
Test
Unit Terminal Unit Parts
DVM RX CV1 RX
RX IN
CN2
CN3
CN4
CN3
CN5
SSG TEST/SPKR
AFVM SPO Terminal
(pin 12)
SSG RX IN
Audio, TEST/SPKR
SPO Terminal
(pin 12)
Adjustment
Specifications/
M ethod
TC2 4.5V ADJ ± 0.1V
Check 1V or more
TC1 4.5V ADJ ± 0.1V
Check 1V or more
L3 Center the frequency Refer to page 80
L16 you are using, then
adjust it to look like
the w ave on page 80.
L31 Adjust it to look like Refer to page 80
L27 the w ave on page 80.
L38
L40
L43
L32 Adjust it to look like Refer to page 80
L28 the w ave on page 80.
L39
L41
L44
L52 Adjust for maximum
L53
Check 20dB SINAD
or more
Remarks