FT897Alignment.pdf

(27 KB) Pobierz
FCC ID: K66FT-897
Alignment
FT-897 Alignment
Local Oscillator Adjustment
Reference Frequency Adjustment
a. Connect a frequency counter to TP1032.
b. Adjust the trimmer capacitor (TC5001) for 67.875000MHz ±5Hz on the frequency counter.
c. Connect a RF millivoltmeter or an oscilloscope to the J5002 2pin (TP1032) and confirm that
the output level is at least 70mVrms or 200mVp-p.
PLL Adjustment
VCO VCV Adjustment
a. Connect a DC voltmeter to J2002 6pin (TP1028) and referring to the table below, tune the
transceiver to each frequency listed. Then confirm that the correct voltage is present, or adjust
the listed components for the required voltage.
Tune to :
13.895MHz
76.000MHz
32.995MHz
13.900MHz
55.995MHz
88.000MHz
163.995MHz
108.000MHz
469.995MHz
420.000MHz
Adjust / Confirm
Adjust T2001
Confirm
Adjust T2002
Confirm
Adjust T2003
Confirm
Adjust L2010
Confirm
Adjust L2011
Confirm
For
5.5V ±0.5V
At least 0.8V
5.5V ±0.5V
At least 0.8V
5.5V ±0.1V
At least 0.8V
5.5V ±0.1V
At least 0.8V
5.5V ±0.1V
At least 0.8V
1
st
Local Output Level
a. Connect a RF millivoltmeter to J2002 11pin and tune the transceiver to 28.000MHz.
b. Confirm that the RF level is at least +3dBm or 300mVrms.
PLL Unlock
a. Connect a DC voltmeter to J2002 1pin (TP1027).
b. When the reference input is not activated, the voltmeter shows less than 0.5V and
“UNLOCK” is displayed on the LCD.
c. When the reference input is activated, the voltmeter shows at least 3.5V and LCD displays
as it normally should do.
Idling Current Adjustment
Before alignment, set the mode on CW and tune the transceiver to 1.800MHz.
Vertex Standard Co., Ltd.
1
FCC ID: K66FT-897
Alignment
Nothing should be connected to the CW Key Jack.
Switch off the S1001.
Pre-Driver Stage Idling Current
a. Connect an ammeter at TP1019 and TP1010.
b. Press the PTT and adjust VR1004 for an indication of 30mA ±2mA on the ammeter.
Driver Stage Idling Current
a. Connect an ammeter at TP1007 and TP1008.
b. Press the PTT and adjust VR1003 for an indication of 20mA ±2mA on the ammeter.
Exciter Stage Idling Current
a. Connect an ammeter at J1004.
b. Turn both VR5401 and VR5402 fully to counterclockwise.
c. Press the PTT and adjust VR1002 for an indication of 100mA ±10mA on the ammeter.
d. Press the PTT and adjust VR1001 for an indication of 200mA ±10mA on the ammeter.
e. Connect the J1004 and switch on the S1001.
Local Oscillator Adjustment
2
nd
Local Adjustment
a. Connect a RF millivoltmeter or an oscilloscope to Q1038 5pin (TP1067).
b. Adjust T1024 and T1026 alternately for the maximum indication on the millivoltmeter or for
the maximum amplitude on the oscilloscope.
c. Confirm the indicated voltage is at least 120mVrms or 330mVp-p.
3ad Local Adjustment
a. Connect a RF millivoltmeter or an oscilloscope to Q1055 5pin (T1087).
b. Key the transceiver on CW mode and adjust T1021 for the maximum indication on the RF
millivoltmeter.
c. Confirm that the indicated voltage is at least 70mVrms or 200mVp-p.
TX IF Adjustment
SSB/CW TX IF Adjustment
a. Tune the frequency to 14MHz band. Connect a RF millivoltmeter to TP1033 and J1002
terminated by 50Ω dummy load.
b. Key the transmitter and adjust T1033, T1023, and T1021 alternately for the maximum
indication on the RF millivoltmeter.
FM TX IF Adjustment
a. Tune the frequency to 28MHz band. Connect a RF millivoltmeter to TP1033 and J1002
terminated by a 50Ω dummy load.
Vertex Standard Co., Ltd.
2
FCC ID: K66FT-897
Alignment
b. Key the transmitter by FM mode and adjust T1014 for the maximum indication on the RF
millivoltmeter.
c. Connect a frequency counter to TP1008.
d. Key the transmitter on FM mode without microphone input. Adjust L1049 for 68.3300MHz
±100Hz.
Carrier Balance Adjustment
a. Terminate J1002 by a 50ohm dummy load and connect a spectrum analyzer or a RF
millivoltmeter.
b. Key the transmitter on USB mode in 14MHz band without microphone input. Adjust
VR1005 for the maximum carrier suppression on the spectrum analyzer or for the minimum
indication on the RF millivoltmeter.
VHF TX BPF Adjustment
a. Set the frequency at 145.995MHz. Connect RF millivoltmeter to J1002 terminated by a
50ohm dummy load.
b. Key the transceiver on FM mode and adjust T1013, T1012, and T1011 alternately for the
minimum indication on RF millivoltmeter.
UHF TX BPF Adjustment
a. Set the frequency at 439.995MHz. Connect a RF millivoltmeter to J1002 terminated by a
50ohm dummy load.
b. Key the transceiver on FM mode and adjust TC1004, TC1003 and TC1002 alternately for the
minimum indication on RF millivoltmeter.
RX Adjustment
PA Unit must be connected in RX adjustment. Signal Generator should not be connected to
J1003 directly because DC voltage comes on there.
RX IF Adjustment
Connect a signal generator to the antenna connector and a SINAD meter to the speaker jack.
SSB IF Adjustment
a. Connect a DC voltmeter to TP1063.
b. Tune the transceiver to 51.995MHz. Inject a RF signal from a signal generator at 40dBu
output.
c. Adjust T1024, T102, T1028, T1030, T1035, T1036, T1037, T1034 and T1029 alternately for the
minimum indication on the DC voltmeter.
FM IF Adjustment
a. Tune the transceiver to 51.995MHz. Inject a RF signal from a signal generator at 10dBu
Vertex Standard Co., Ltd.
3
FCC ID: K66FT-897
Alignment
output, 1KHz AF FM modulation of 3.5KHz deviation.
b. Adjust T1024, T1026, and T1028 alternately for the best SINAD sensitivity.
c. Increase the output level of the signal generator up to 12dBu approximately and adjust
T1024 and T1026 alternately for the best SINAD sensitivity.
Air-Band Reception Adjustment
a. Connect a DC voltmeter to TP1044.
b. Tune the transceiver to 128.00MHz on AM mode. Inject a RF signal from a signal generator
at 40dBu output, 40% AM modulation of 400Hz AF.
c. Adjust T1005 and T1008 for the minimum indication on the DC voltmeter.
VHF Band Alignment
a. Connect a DC voltmeter to TP1044.
b. Tune the transceiver to 145.995MHz. Inject a RF signal from a signal generator at 20dBu
output.
c. Adjust T1006, T1009 and T1010 alternately for the minimum indication on the DC voltmeter.
UHF Band Alignment
a. Connect a DC voltmeter to the TP1044.
b. Tune the transceiver to 439.995MHz. Inject a RF signal from a signal generator at 20dBu
output.
c. Adjust TC1001 for the minimum indication on the DC voltmeter.
W-FM Reception Adjustment
a. Connect a SINAD meter to the speaker jack.
b. Tune the transceiver to 88.00MHz. Inject a RF signal from a signal generator at 30dBu
output, 22.5KHz deviation FM modulation of 1KHz AF.
c. Adjust TC1005 for the best SINAD sensitivity. Then reduce the output level of the signal
generator and adjust TC1003 again.
Image Rejection Trap Adjustment
a. Connect an AF millivoltmeter to the speaker jack.
b. Tune the transceiver to 51.995MHz on CW mode. Inject a RF signal from a signal generator
at 68.330MHz, 70dBu output.
c. Adjust T1014 for the minimum indication on the AF millivoltmeter. Then increase the
output level of the signal generator slightly and adjust T1014 again.
Noise Blanker Adjustment
a. Connect a DC voltmeter to TP1043. Tune the transceiver to 51.995MHz and inject a RF signal
from a signal generator at 20dBu output.
b. Activate the noise blanker and adjust T1027 and T1031 for the minimum indication on the
DC voltmeter at TP1043, for the maximum indication at the base of Q1074.
Vertex Standard Co., Ltd.
4
FCC ID: K66FT-897
Alignment
Power Amplifier Adjustment
HF/50MHz Idling Current Adjustment
a. Connect an ammeter at TP3021 and TP3022.
b. Turn both VR3002 fully to counterclockwise.
c. Press the PTT and adjust VR3002 for an indication of 300mA ±10mA on the ammeter.
V/UHF Idling Current Adjustment
a. Connect an ammeter at TP3021 and TP3022.
b. Turn both VR3001 fully to counterclockwise.
c. Press the PTT and adjust VR3001 for an indication of 300mA ±10mA on the ammeter.
e. Connect the J1004 and switch on the S1001.
CM Coupler Balance Adjustment
a. Terminate the antenna jack with a 50Ω dummy load. Set the mode on CW, connect a DC
voltmeter to TP3002.
b. Tune the transceiver in 28MHz band and key the transceiver.
c. Adjust TC3002 for the minimum indication on the DC voltmeter.
d. Tune the transceiver in 145.995MHz band and key the transceiver.
e. Adjust VR3003 for the minimum indication on the DC voltmeter.
f. Tune the transceiver in 439.995MHz band and key the transceiver.
g. Adjust TC3001 for the maximum indication on the RF Power meter.
Software Menu Alignment
Antenna connector should be connected to a dummy load in case of transmission or a signal
generator in case of reception. General alignment conditions are as follows in case otherwise
noted.
AF-gain knob: Center
RF-gain knob: Fully clockwise
SQL: Fully counterclockwise
ATT/IPO/CTCSS/DCS: Off
Output power: High
AGC: Auto
Break-in: On, CW Keyer: Off
VOX: Off
Keep pressing the Multi Function Key [A],[B],[C] simultaneously and turn on the transceiver,
the alignment menu will be activated.
In the alignment procedure, each alignment parameter is selected by rotating the main dial.
Alignment item is selected by rotating VFO/M-CH knob.
To store the alignment parameters, press the [MENU] key for longer than half second.
Vertex Standard Co., Ltd.
5

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin