TKR-851
40
Item
Condition
Measurement
Adjustment
Specifications/Remarks
Test-
equipment
Unit
Terminal
Parts
Unit
Method
ADJUSTMENT
7. Setting
1) Remove 8 pin cable and the coaxial cable from CN16, and CN19 on TX-RX side.
8. TX
1) Connect the frequency
f. counter
TX-RX
CN19
PC adj.
50Hz or less
frequency
counter to CN19, then
(A/2)
measure the frequency
CH : 2
9. Setting
1) Insert 8 pin cable and the coaxial cable to CN16, and CN19 on TX-RX side.
10. Maximum
1) Measure the RF power at
Power meter Rear
TX ANT
Final
VR1
Adjust the RF power
±
0.5W
power
TX ANT.
to 26.5W.
limitting
High CH
11. TX RF
1) Measure the RF power at
PC adj.
±
0.5W
high power
TX ANT.
25W
Low CH
(Factory-default)
2) Center CH
3) High CH
12. TX RF
1) Measure the power level at
PC adj.
±
0.05W
low power
TX ANT.
1W
Low CH
(Factory-default)
2) Center CH
3) High CH
13. BPF
1) Connect the TG to RX ANT,
Tracking
Rear
RX ANT
TX-RX
L2
Center the frequency
then connect CN1 to the
generator
(A/2)
L4
you are using, then
spectrum analyzer input.
L5
adjust it to look like
Spectrum analyzer setting
Spectrum
TX-RX
CN1
the wave Fig. 1.
Span : 50MHz
analyzer
(A/2)
(Page 38)
Scale : 10dB to 5dB div
Tracking generator setting
Output : –30dBm
14. MCF
1) Connect the TG to CN2, then
CN2
L14
Adjust it to look like
(Wide)
connect CN4 to the spectrum
CN4
L17
the wave Fig. 2.
analyzer input.
L18
(Page 38)
CH : 2 (Wide)
Spectrum analyzer setting
Span : 50kHz to 25kHz
Scale : 10dB to 2dB div
Center freq‘ : 44.850MHz
Tracking generator setting
Output : –30dBm
(Narrow)
2) CH : 2 (Narrow)
L15
Adjust it to look like
L16
the wave Fig. 3.
L19
(Page 38)
15. Discrimi-
1) Connect the SSG to RX ANT.
SSG
Rear
RX ANT
L24
Adjust the distortion
nator
CH : 2 (Wide)
to minimum.
SSG output : –53dBm/501
µ
V
AF VM
TEST/SPKR
SSG MOD : 1kHz
Distortion
jack SPO
SSG DEV : 3kHz
meter
(pin 12)
AF : 2V/4
Ω
16. Threshold
1) Connect SSG to RX ANT.
SSG
Rear
RX ANT
PC adj.
squelch
CH : 2 (Wide)
Adjust to point of
(Wide)
SSG output : 4dB below to
Audio
TEST/SPKR
closing squelch
12dB SINAD level
analyzer
jack SPO
SSG MOD : 1kHz
VTVM
(pin 12)
SSG DEV : 3kHz
Oscilloscope
AF : 2V/4
Ω
2) SSG : OFF
Check
Squelch must be closed.