Yaesu VX-2500V User manual

FCC ID: K66VX-2500V
Alignment
Vertex Standard Co., Ltd.
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VX-2500V Alignment
Introduction
The VX-2500V is carefully aligned at the factory for the specified performance across the
frequency range specified for each version. Realignment should therefore not be necessary
except in the event of a component failure, or altering version type. 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 transceiver 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 transceiver
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 transceiver 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
RF Signal Generator with calibrated output level at 1000MHz
Deviation Meter (linear detector)
In-line Wattmeter with 5% accuracy at 1000MHz
50-ΩRF Dummy Load with power rating 100W at 1000MHz
4-ΩAF Dummy Load
Regulated DC Power Supply (standard 13.8V DC, 15A)

FCC ID: K66VX-2500V
Alignment
Vertex Standard Co., Ltd.
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Frequency Counter with 0.1ppm accuracy at 1000MHz
AC Voltmeter
DC Voltmeter
VHF Sampling Coupler
IBM PC / compatible Computer
Oscilloscope
Vertex Standard VPL-1 Connection Cable &Alignment program
Alignment Preparation & Precautions
A 50-ΩRF Dummy Load and in-line wattmeter must be connected to the main antenna 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
transceiver and test equipment, and that this temperature be held constant between 20 and
30°C (68 ∼86 °F). When the transceiver 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
0dBµEMF = 0.5µV.
Setup the test equipment as shown for transceiver alignment,apply 13.8V DC power to the
transceiver. Refer to the drawings above for Alignment Points.
Fig.1 Alignment Setup
VPL-1
cable
J1502
Data port
VX-2500
In-Line
Wattmeter RF sampling coupler
Deviation meter
Frequency
counter
50ohm
Dummy Load
13.8Vdc power supply
Signal generator
A
ntenna Port
Oscilloscope
AF
Generator
Sinad
Meter
4ohm
Dummy
Personal Com
p
uter
See Fi
g
2

FCC ID: K66VX-2500V
Alignment
Vertex Standard Co., Ltd.
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(Fig 2: J1502 connection for the modulation adjustment)
The transceiver must be programmed for use in the intended system before alignment is
attempted. The RF parameters are loaded from the file during the alignment process.
[Important]
In order to facilitate alignment over the complete switching range of the equipment it is
recommended that the channel data in the transceiver is preset as the chart below.
Table.1 RF Ch. List Frequency(Simplex)
RF Ch. list Ch. Space Ver. C
Ch #1 Wide 161.100 MID Frequency(Wide) [use in the SVC47]
Ch #2 Narrow 161.100 MID Frequency(Narrow) [use in the SVC47 ]
Ch #3 Wide 148.100 LOW Frequency [for PLL VCV adjustment]
Ch #4 Wide 173.900 HIGH Frequency [for PLL VCV adjustment]
The alignment mode is accessed by “Alignment mode” command from the computer whilst
switching on. And it is operated by the alignment tool automatically.
During the alignment mode, normal operation is suspended. Use the alignment tool program
running on PC.
・PLL VCV
□
□
□
Connect the positive lead of the DC voltmeter to the test point TP1007 (VCV) on the RF-Unit,
as indicated in the figure, and the negative lead to chassis ground.
□
□
□
Set the transceiver to the high band edge frequency channel, then adjust coil L1017 on the
Unit for 4.25V on the voltmeter.
□
□
□
Key the transmitter, and adjust coil L1020 on the Unit for 4.25V on the voltmeter.
□
□
□Next select to the low edge frequency channel and confirm above 0.80V to 1.50V on the
voltmeter.
□
□
□
Key the transmitter, and confirm above 1.00V to 1.50V on the voltmeter.
・PLL Reference Frequency
With the wattmeter, dummy load and frequency counter connected to the antenna jack, and
select band center frequency channel, key the transmitter and adjust VR1001 on the RF-Unit, if
necessary, so the counter frequency is within 100 Hz of the channel center frequency for the
transceiver version.
The alignment tool outline
Installation the tool
This alignment tool consists,MS-DOS based, only one execute file " svc47.exe ". You make a
54
3
21
9876
AF Generator
Ground

FCC ID: K66VX-2500V
Alignment
Vertex Standard Co., Ltd.
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directly as you think fit, and copy this file. That is all of the installation process.
Boot the tool
Change directly and input in command line, " svc47 [enter] ", and boot the alignment tool.
Preparation
Setup the test equipment as "Alignment Preparation & Precautions".
Set the RF Ch. List to Table1 on the CE47 Clone editor software.
Enter to the alignment mode
To enter the alignment mode, and press "[0] Alignment Mode" on the personal computer Key
board. You turn off the power of the transceiver, and turn on the transceiver. If entry
succeed,the alignment tool display as follows.
[0]Common TX
[1]Common RX
Action of the switches
When the transceiver is in alignment mode, the action of [PTT], [MON],[UP],[DOWN] is
ignored. All of the action is remote controlled by PC.
Menu of the tool
[0]Common TX
- [0] Tx Power High
This parameter is used to align TX High power (25W).
Press [Enter] on "[0] Tx Power High" to align TX High power.
Select the Channel 1 in alignment range.
Press the [Space] key on the keyboard to activate the transmitter.
Press the [UP]/[DWN] key, as need, to set the power output to the following
specification, as indicated on the external wattmeter.
Tx Power High:25[W](±0.5W)
When the 25Watt level is attained, press [Enter] to lock in the new data.
- [1] Tx Power Low
This parameter is used to align TX Low power (5W).
Press [Enter] on "[1] Tx Power Low" to align TX Low power.
Select the Channel 1 in alignment range.
Press the [Space] key on the keyboard to activate the transmitter.
Press the [UP]/[DWN] key, as need, to set the power output to the following
specification, as indicated on the external wattmeter.
Tx Power Low:5[W](±0.1[W])
When the 5Watt level is attained, press [Enter] to lock in the new data.
- [2] VCO Deviation
This parameter is used to align the VCO Deviation.
Press [Enter] on "[2] VCO Deviation" to align VCO Deviation.
Select the Channel 1 in alignment range.
Adjust the AF generator output level to 388mVrms(-6dBm) at 1 kHz to the pin3 of the
J1502 (-sub 9pin ).
Press the [Space] key on the keyboard to activate the transmitter.
Press the [UP]/[DWN] key, as need, to set the VCO Deviation (Wide) to the following

FCC ID: K66VX-2500V
Alignment
Vertex Standard Co., Ltd.
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specification, as indicated on the deviation meter.
When the desired deviation level is attained, press [Enter] to lock in the new data.
Select the Channel 2, and set the VCO Deviation (Narrow), same as Channel 1.
VCO Deviation(Wide) :4.0[kHz](±0.1[kHz])
VCO Deviation(Narrow):2.0[kHz](±0.1[kHz])
- [3] REF Deviation
This parameter is used to align the REF Deviation.
Press [Enter] on "[3] REF Deviation" to align REF Deviation.
Select the Channel 1 in alignment range.
Adjust the AF generator output level to 388mVrms(-6dBm) at 100Hz to the pin3 of the
J1502.
Press the [Space] key on the keyboard to activate the transmitter.
Press the [UP]/[DWN] key, as need, to set the modulation wave as follows.
Press [Enter] to lock in the new data.
Select the Channel 2, and set the modulation wave, same as Channel 1.
OK NG NG
- [4] CTCSS Deviation
This parameter is used to align the CTCSS deviation.
Press [Enter] on "[4] CTCSS Deviation" to align CTCSS Deviation.
Select the Channel 1 in alignment range.
Press the [Space] on the keyboard to activate the transmitter, and injects a CTCSS test
tone.
Press the [UP]/[DWN] key, as need, to set the CTCSS Deviation (Wide) to the following
specification.
Press [Enter] to lock in the new data.
Select the Channel 2, and set the CTCSS Deviation (Narrow), same as Channel 1.
CTCSS Deviation(Wide) :0.70[kHz](±0.1[kHz])
CTCSS Deviation(Narrow):0.35[kHz](±0.1[kHz])
- [5] DCS Deviation
This parameter is used to align the DCS deviation.
Press [Enter] on "[5] DCS Deviation" to align DCS Deviation.
Select the Channel 1 in alignment range.
Press the [Space] key on the keyboard to activate the transmitter, and injects a DCS
test tone.
Press the [UP]/[DWN] key, as need, to set the DCS deviation (Wide) to the following
specification.
Press [Enter] to lock in the new data.
Select the Channel 2, and set the DCS deviation (Narrow), same as Channel 1.
DCS Deviation(Wide) :0.60[kHz](±0.1[kHz])
DCS Deviation(Narrow):0.30[kHz](±0.1[kHz])
The actual DCS deviation will increase around 20% based on the above alignment as
follows, Actual DCS Deviation(Wide) :0.70[kHz]

FCC ID: K66VX-2500V
Alignment
Vertex Standard Co., Ltd.
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Actual DCS Deviation(Narrow):0.35[kHz]
- [6] LTR Deviation
This parameter is used to align the LTR deviation.
Press [Enter] on "[6] LTR Deviation " to align LTR Deviation.
Select the Channel 1 in alignment range.
Press the [Space] key on the keyboard to activate the transmitter, and injects a LTR
test tone.
Press the [UP]/[DWN] key, as need, to set the LTR Deviation (Wide) to the following
specification.
Press [Enter] to lock in the new data.
Select the Channel 2, and set the LTR deviation (Narrow), same as Channel 1.
LTR Deviation(Wide) :0.80[kHz](±0.1[kHz])
LTR Deviation(Narrow) :0.60[kHz](±0.1[kHz])
The actual LTR deviation will increase around 20% based on the above alignment as
follows, Actual LTR Deviation(Wide) :1.00[kHz]
Actual LTR Deviation(Narrow):0.70[kHz]
[1]Common RX
- [0] Tight NSQL
This parameter is used to align the noise level in squelch Tight.
It adjusts this alignment RX Tuning after ending.
Select the MID frequency channel in alignment range.
Set the SG output level to -2.5dBµV, and obey the message.
- [1] Threshold NSQL
This parameter is used to align the noise level in squelch Threshold.
It adjusts this alignment RX Tuning after ending.
Select the MID frequency channel in alignment range.
Set the SG output level to -8.5dBµV, and obey the message.
- [2] RX Tune
This parameter is used to align RX Tune.
Select the MID frequency channel in alignment range.
Set the SG output level to -8.0dBµV.
Pressing the [DWN] key, reduce the RX Tune Level and set the SINAD above 12dB.