Vertex Standard FT-100, Technical Supplement

Page: 4 / 123

6
Alignment
Local Oscillator Adjustments
Reference Frequency Adjustment
m
Remove the coaxial plug from J2005 and connect the
frequency counter across its socket.
m
Adjust trimmer capacitor TC2801 or X2901 (use TCXO-
8) for 57.279999 MHz ± 60 Hz or 30 Hz (use TCXO-8)
on the frequency counter.
m
Disconnect the frequency counter, and replace the plug
into J2005.
2
nd
Local Adjustment
m
Connect the 50-
W
resistor and RF millivoltmeter to
J2005.
m
Adjust T2003 and T2004 for maximum indication on
the RF millivoltmeter (at least 180 mV).
m
Disconnect the frequency counter, and replace the plug
into J2005.
3
rd
Local Adjustment
m
Set the RF power to the minimum (using Menu #21),
and select the CW mode. Connect the 50-
W
resistor and
RF millivoltmeter to J2004.
m
Key the transmitter, and adjust T2001 and T2002 for
maximum indication on the RF millivoltmeter (at least
80 mV).
m
Replace the RF millivoltmeter with the frequency
counter, and confirm that the local frequency is 11.705
MHz (±1 kHz) on the frequency counter.
m
Disconnect the frequency counter, and replace the plug
into J2004.
PLL Adjustments
VCO VCV Adjustment
m
Connect the DC voltmeter to TP2001, and referring to
table below, tune the transceiver to each frequency list-
ed. Then confirm that the correct voltage is present, or
adjust the listed component for the required voltage.
Tune to: Adjust/Confirm For
449.99999 MHz Adjust TC2005 7.4 V ±0.1 V
420.00000 MHz Confirm 2.0 V ~ 4.8 V
381.99999 MHz Adjust TC2006 7.4 V ±0.1 V
108.00000 MHz Confirm 1.2 V ~ 4.0 V
245.99999 MHz Adjust TC2004 7.4 V ±0.1 V
60.00000 MHz Confirm 0.8 V ~ 4.0 V
197.99999 MHz Adjust TC2003 7.4 V ±0.1 V
33.00000 MHz Confirm 1.2 V ~ 4.0 V
170.99999 MHz Adjust TC2002 7.4 V ±0.1 V
15.00000 MHz Confirm 1.4 V ~ 4.2 V
14.99999 MHz Adjust TC2001 7.4 V ±0.1 V
0.03000 MHz Confirm 1.5 V ~ 4.0 V
1
st
Local Output Level
m
With the 50-
W
resistor and RF millivoltmeter connect-
ed to the J2003, and referring to table below, tune the
transceiver to each frequency listed, then confirm that
the required output level is present at the listed frequency.
Tune to: For
14.175 MHz 11 dBm ±3 dB
52.050 MHz 11 dBm ±3 dB
146.500 MHz 11 dBm ±3 dB
440.500 MHz 11 dBm ±3 dB
PA Unit Adjustments
Before beginning, remove the coaxial plugs from J3503
and J3005, and connect 50-
W
resistors across the sockets
for these jacks (shunt to ground at each jack).
HF/50MHz Driver Section Idling Current
m
Remove the coaxial plug from J3001, and connect a 50-
W
resistor across its socket. Remove the jumper connec-
tor at J3504. Connect the ammeter to J3504 (pin 1: “–”
lead, pin 2: “+” lead).
m
Tune the transceiver to the 14.2000 MHz and select the
USB mode.
m
Key the transmitter, and adjust VR3004 for a reading of
50 ~ 55 mA on the ammeter.
m
Disconnect the ammeter, and reinstall the jumper con-
nector at J3504.
m
Remove the jumper connector at J3003. Connect the am-
meter to J3003 (pin 1: “–” lead, pin 2: “+” lead).
m
Key the transmitter, and adjust VR3001 for a reading of
1.1 A on the ammeter (within 60 mA).
m
Disconnect the ammeter, and reinstall the jumper con-
nector at J3003.
HF/50 MHz Final Idling Current Adjustment
m
Leave the coaxial plug disconnected from J3001, and
be sure that the 50-
W
resistor is connected across its
socket. Connect the ammeter between the transceiver’s
13.8VDC connector and the DC power supply.
m
Tune the transceiver to the 14.2000 MHz and select USB
mode.
m
Key the transmitter, and adjust VR3002 for a reading of
1.6 A on the ammeter (within 50 mA).
m
Adjust the VR3003 for a reading of 2.1 A (±50 mA) on
the ammeter.
VHF/UHF Driver Section Idling Current
m
Remove the coaxial plug from J3501, and connect a 50-
W
resistor across its socket. Remove the jumper connec-
tor at J3502. Connect the ammeter to J3502 (pin 1: “–”
lead, pin 2: “+” lead).