Vertex Standard VX-1210 User manual

VX-1210
Alignment
1
VX-1210 Alignment
The VX-1210 is carefully aligned at the factory for the specified performance across the entire
operating frequency range. Realignment should therefore not be necessary except in the event of a
component failure. All component replacement and service should be performed only by an
authorized Vertex Standard representative, or the warranty policy may be void.
The following procedures cover the sometimes critical and tedious adjustments that are not normally
required once the repeater has left the factory. However, if damage occurs and some parts
subsequently are placed, realignment may be required. If a sudden problem occurs during normal
operation, it is likely due to component failure; realignment should not be done until after the faulty
component has been replaced.
We recommend that servicing be performed only by authorized Vertex Standard service technicians
who are experienced with the circuitry and fully equipped for repair and alignment. Therefore, if a
fault is suspected, contact the dealer from whom the repeater was purchased for instructions
regarding repair. Authorized Vertex Standard service technicians realign all circuits and make
complete performance checks to ensure compliance with factory specifications after replacing any
faulty components.
Those who do undertake any of the following alignments are cautioned to proceed at their own risk.
Problems caused by unauthorized attempts at realignment are not covered by the warranty policy.
Also, Vertex Standard reserves the right to change circuits and alignment procedures in the interest
of improved performance, without notifying owners.
Under no circumstances should any alignment be attempted unless the normal function and
operation of the repeater are clearly understood, the cause of the malfunction has been clearly
pinpointed and any faulty components replaced, and realignment determined to be absolutely
necessary.
The following test equipment (and thorough familiarity with its correct use) is necessary for
complete realignment. Correction of problems caused by misalignment resulting from use of
improper test equipment is not covered under the warranty policy. While most steps do not require
all of the equipment listed, the interactions of some adjustments may require that more complex
adjustments be performed afterwards.
Do not attempt to perform only a single step unless it is clearly isolated electrically from all other
steps. Have all test equipment ready before beginning, and follow all of the steps in a section in the
order presented.
Required Test Equipment
rRF Signal Generator with calibrated output level at 30 MHz
rIn-line Wattmeter with 5% accuracy at 30 MHz
r50 ΩRF Dummy Load with power rating 50W at 30MHz
r16 ΩRF Dummy Load with power rating 50W at 30MHz
rFrequency Counter with 0.02ppm accuracy at 40MHz
rAF Signal Generator
rAC Voltmeter
rDC Voltmeter: High input impedance
rDC Ammeter
rHF Sampling Coupler
rIBM PC / compatible Computer with MS-DOS or later operating system
rYaesu ___ Connection Cable & ___ Channel/Alignment Diskette

VX-1210
Alignment
2
Alignment Preparation & Precautions
A 50 ΩRF Dummy Load and in-line wattmeter must be connected to the ANT jack in all procedures
that call for transmission, except where specified otherwise. Correct alignment is not possible with
an antenna.
After completing one step, read the following step to determine whether the same test equipment
will be required. If not, remove the test equipment (except dummy load and wattmeter, in connected)
before proceeding.
Correct alignment requires that the ambient temperature be the same as that of the repeater and test
equipment, and that this temperature be held constant between 20ºand 30 °C (68º~ 86 °F). When
the repeater is brought into the shop from hot or cold air, it should be allowed time to come to room
temperature before alignment.
Whenever possible, alignments should be made with oscillator shields and circuit boards firmly
affixed in place. Also, the test equipment must be thoroughly warmed up before beginning.
Note: Signal levels in dB referred to in the alignment procedure are based on 0dBµ = 0.5µV.
Set up the test equipment as shown below, and apply 13.8V DC power to the transceiver.
The VX-1210 must be programmed for use in the intended system before alignment is attempted.
The frequency and other parameters are loaded from the file during the alignment process.
In order to facilitate alignment over the complete switching range of the equipment it is
recommended that the channel data first be uploaded and then stored to disk. Alignment Channel
data should then be downloaded. The original data can be replaced at the end of the alignment
process.
PLL Alignment
PLL Reference Frequency Alignment
rRemove the coaxial plug from J2009 on the CNTL Unit, and connect the Frequency Counter to
J2009.
rAdjust TC2001 on the CNTL Unit for 36.355 MHz ±10 Hz on the frequency Counter.
2nd Local Output Level
rDisconnect the Frequency Counter, and connect the RF millivoltmeter to J2009.
rConfirm that the output level is 0 dBm ±2dB on the RF millivoltmeter.
rDisconnect the RF millivoltmeter, and replace the plug into J2009.
Carrier Output Level
rRemove the coaxial plug from J2008 on the CNTL Unit, and connect the RF millivoltmeter to
J2008.
rSelect the “VCO1 U”channel (8.99999 MHz, USB), and confirm that the output level is –5.5
dBm ±2 dB.
rDisconnect the RF millivoltmeter, and replace the plug into J2008.
VCO VCV Alignment
rConnect the DC voltmeter to TP2005 on the CNTL Unit, and referring Table below, turn the
transceiver to each channel listed. Then adjust the listed component for the required voltage or
confirm that the correct voltage is present.

VX-1210
Alignment
3
Tune to: Adjust or Confirm: For:
“VCO1 U”channel (8.9999 MHz, USB) T2001 6.0 V ±0.1 V
“VCO1 L”channel (0.50000 MHz, USB) Confirm 1.3 ~ 2.3 V
“VCO2 U”channel (18.9999 MHz, USB) T2002 6.0 V ±0.1 V
“VCO2 L”channel (9.00000 MHz, USB) Confirm 1.0 ~ 2.0 V
“VCO3 U”channel (30.00000 MHz, USB) T2003 6.0 V ±0.1 V
“VCO3 L”channel (19.00000 MHz, USB) Confirm 1.0 ~ 2.0 V
1st Local Output Level
rConnect the RF millivoltmeter to TP1001 on MAIN Unit.
rConfirm that the output level is 13 dBm ±3 dB.
Receiver Alignment
RX IF Coils Alignment
rConnect the RF Signal Generator to ANT jack, and connect the DC voltmeter to TP1005 on the
MAIN Unit.
rSelect the “RX IF”channel (10.15000 MHz, USB).
rInject a signal from the RF Signal Generator to 10.15100 MHz, then adjust the RF Signal
Generator output level so that the DC voltmeter reading is approximately 3 V.
rAdjust T1008, T1009, T1010, T1011, T1012, T1015, T1016, and T1017 in succession several
times for minimum indication on the DC Voltmeter.
RX Gain Alignment
rConnect the RF Signal Generator to ANT jack, and connect the DC voltmeter to TP1005 on the
MAIN Unit.
rSelect the “RX IF”channel (10.15000 MHz, USB), and recall the [RX GAIN] parameter on the
computer.
rInject a signal from the RF Signal Generator to 10.15100 MHz, then adjust the RF Signal
Generator output level for 6 dBµ.
rPress the UP(π)/DOWN(θ) key so that the difference of the DC Voltmeter reading is 0.2 V ±0.1
V when the RF Signal Generator on and off.
Noise Blanker Alignment
rConnect the RF Signal Generator to ANT jack, and connect the DC voltmeter to TP1004 on the
MAIN Unit.
rSelect the “RX IF”channel (10.15000 MHz, USB).
rInject a signal from the RF Signal Generator to 10.15100 MHz, then adjust the RF Signal
Generator output level so that the DC voltmeter reading is approximately 3 V.
rAdjust T1013 and T1014 for minimum indication on the DC Voltmeter.
47.055 MHz IF Trap Alignment
rConnect the RF Signal Generator to ANT jack, and connect the DC voltmeter to TP1005 on the
MAIN Unit.
rSelect the “IF TRAP”channel (30.00000 MHz, USB).
rInject a signal from the RF Signal Generator to 47.05400 MHz, then adjust the RF Signal
Generator output level for 100 dBµ.
rAdjust T1002 for maximum indication on the DC Voltmeter.

VX-1210
Alignment
4
Transmitter Alignment
TX IF Coils Alignment
rRemove the coaxial plug from J1004 on the MAIN Unit, then connect the RF millivoltmeter and
50 Ωresistor to J1004.
rConnect the AF Generator to pin 4 of the MIC jack.
rSelect the “TX IF”channel (10.25000 MHz, USB).
rInject a signal from the AF Generator to 1500 Hz, then adjust the AF Generator output level so
that the RF millivoltmeter reading is approximately 0 dBm.
rKey the transmitter (connect pin 5 of the MIC jack to GND), adjust T1010, T1018, T1019,
T1020, and T1022 on the MAIN Unit in succession several times for maximum indication on the
RF millivoltmeter.
rDisconnect the RF millivoltmeter, and replace the plug into J1004.
MIC Gain Alignment
rConnect the AF millivoltmeter to TP1003 on the MAIN Unit.
rConnect the AF Generator to pin 4 of the MIC jack.
rSelect the “TX IF”channel (10.25000 MHz, USB).
rInject a signal from the AF Generator to 1500 Hz, then adjust the AF Generator output level for
8 mV.
rKey the transmitter (connect pin 5 of the MIC jack to GND), adjust VR1001 on the MAIN Unit
for 30 mV ±3 mV on the RF millivoltmeter.
Carrier Balance Pre-Alignment
rRemove the coaxial plug from J1004 on the MAIN Unit, then connect the RF millivoltmeter and
50 Ωresistor to J1004.
rSelect the “TX IF”channel (10.25000 MHz, USB).
rKey the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, adjust
TC1002 and VR1003 on the MAIN Unit for minimum indication on the RF millivoltmeter.
rDisconnect the RF millivoltmeter, and replace the plug into J1004.
Driver Section Idling Current Alignment
rRemove the Short-plug from J3505 on the PA Unit, then connect the DC Ammeter to J3505 (pin
1: “–”lead, pin 2: “+”lead).
rSelect the “TX IF”channel (10.25000 MHz, USB).
rKey the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, adjust
VR3501 on the PA Unit for 50 mA ±5 mA on the DC Ammeter.
rDisconnect the DC Ammeter, and replace the Short-plug into J3505.
Final Section Idling Current Alignment
rRemove the Solder jumper from JP3501 on the PA Unit, and connect the DC Ammeter to J3506
(pin 1: “–”lead, pin 2: “+”lead) on the PA Unit.
rSelect the “TX IF”channel (10.25000 MHz, USB).
rKey the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, adjust
VR3502 on the PA Unit for 100 mA ±10 mA on the DC Ammeter.
rDisconnect the DC Ammeter, and connect JP3501 by solder jumper.
CM Coupler Balance
rConnect the 50ΩDummy Load and Inline Wattmeter to the ANT jack, then connect the AF
Generator to pin 4 of the MIC jack, and adjust the AF Generator to 1500 Hz.
rConnect the DC voltmeter to pin 3 of JP3003 (“+”lead, “–”lead: GND) on the CNTL Unit.
rSelect the “CM BAL”channel (29.9000 MHz, USB).
rKey the transmitter (connect pin 5 of the MIC jack to GND), then adjust the AF Generator

VX-1210
Alignment
5
output level so that the Inline Wattmeter reading is approximately 20 Watts.
rNow, adjust TC3001 for minimum indication on the DC voltmeter.
TX Gain Alignment (SSB)
rConnect the 50ΩDummy Load and Inline Wattmeter to the ANT jack, then connect the AF
Generator to pin 4 of the MIC jack, and adjust the AF Generator to 1500 Hz, 8 mV.
rReferring Table below, turn the transceiver to each channel listed, and recall the computer to
each parameter listed. Then key the transmitter and press the UP/DOWN key for the required
output.
Tune to: Recall Parameter: For:
“TXG S 1H”channel (3.50000 MHz, USB) [TX GAIN SSB/H (~4)] 20 W
“TXG S 2H”channel (5.00000 MHz, USB) [TX GAIN SSB/H (4~6)] 20 W
“TXG S 3H”channel (7.50000 MHz, USB) [TX GAIN SSB/H (6~9)] 20 W
“TXG S 4H”channel (11.00000 MHz, USB) [TX GAIN SSB/H (9~13)] 20 W
“TXG S 5H”channel (16.50000 MHz, USB) [TX GAIN SSB/H (13~20)] 20 W
“TXG S 6H”channel (25.00000 MHz, USB) [TX GAIN SSB/H (20~30)] 20 W
SSB Output Power Alignment
rConnect the 50ΩDummy Load and Inline Wattmeter to the ANT jack, then connect the AF
Generator to pin 4 of the MIC jack, and adjust the AF Generator to 1500 Hz, 25 mV.
rReferring Table below, turn the transceiver to each channel listed, and recall the computer to
each parameter listed. Then key the transmitter and press the UP/DOWN key for the required
output.
Tune to: Recall Parameter: For:
“TXP S 1H”channel (6.50000 MHz, USB) [SSB PO (H ~10)] 20 W
“TXP S 2H”channel (15.00000 MHz, USB) [SSB PO (H 10~20)] 20 W
“TXP S 3H”channel (25.00000 MHz, USB) [SSB PO (H 20~30)] 20 W
REV ALC Alignment
rConnect the 50ΩDummy Load to the ANT jack, then connect the DC voltmeter to pin 3 of
J1010 (“+”lead, “–”lead: GND) on the MAIN Unit.
rSelect the “REV ALC”channel (10.25000 MHz), and recall the [REV ALC] parameter on the
computer.
rKey the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, then
press the UP/DOWN key so that the DC voltmeter reading is xx V ±xx V.
HI SWR Indicator Alignment
rConnect the 16 ΩDummy Load (or three 50 ΩDummy Loads in parallel) to the ANT jack.
rSelect the “REV ALC”channel (10.25000 MHz), and recall the [HI SWR] parameter on the
computer.
rKey the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, then
press the UP/DOWN key so that the front panels LED indicator will blinks yellow.
Carrier Balance Alignment
rWith the 50 dB Attenuator (or 50 ΩDummy Load and Sampling Coupler) and Spectrum
Analyzer connected to the ANT jack.
rSelect the “xxx”channel (xxx MHz, xxx).
rKey the transmitter (connect pin 5 of the MIC jack to GND) with no microphone input, adjust
TC1002 and VR1003 on the MAIN Unit for minimum indication on the Spectrum Analyzer.