Vertex Standard VX-160U User manual

VX-160U/180U

Alignment

VX-160U/180U Alignment

VX-160U/180U AlignmentVX-160U/180U Alignment

VX-160U/180U Alignment

The VX-160U/180U has been carefully aligned at the factory for the specified

performance across the frequency range specified for each version. Re-alignment should

therefore not be necessary except in the event of component failure, or altering version

type. All component replacement and service should only be performed by an authorized

VERTEX STANDARD representative, or the warranty policy may be void.

Required Test Equipment

Required Test EquipmentRequired Test Equipment

Required Test Equipment

CT-42 Programming Cable with CE44 Channel Programming Diskette

RF Signal Generator with calibrated output level at 1GHz

Deviation Meter (Linear Detector)

AC Voltmeter

SINAD Meter

In-Line wattmeter with 5 % accuracy at 500 MHz

Regulated DC Power Supply adjustable from 4 to 10 V, 3 A

50ΩNon-reactive Dummy Load: 10 W at 500 MHz

Frequency Counter: ±0.2 ppm accuracy at 500 MHz

AF Signal Generator

DC Voltmeter: high impedance

Before beginning alignment, connect the transceiver and PC using the CT-42

Programming Cable, and run the CE44 Channel Programming Diskette, then download

the EEPROM data from the transceiver to the computer.

Then store this data in a disk file so that it can be uploaded when alignment is finished.

You should find the corresponding data file on the computer disk for the transceiver

version you are aligning, containing channel settings for the high edge, middle and low

edge of the transceiver’s frequency range in channels 1, 2 and 3, respectively. Up-load

this file to the transceiver.

Low Band Edge (Channel 1): 400.000 MHz

Band Center (Channel 2): 415.000 MHz

High Band Edge (Channel 3): 430.000 MHz

Note

NoteNote

Note

: Signal levels in dB referred in the alignment procedure are based on 0dBµ = 0.5

µV.

VX-160U/180U

Alignment

PLL & Transmitter

PLL & TransmitterPLL & Transmitter

PLL & Transmitter

Set up the test equipment as shown for transmitter alignment. Adjust the supply

voltage to 7.2 V for all steps where not specified otherwise.

PLL VCV (Varactor Control Voltage)

Connect the DC voltmeter between TP03 on the Main Unit and ground.

Set the transceiver to CH 3 (high band edge), and adjust L1004 on the Main Unit

for 4.1 V ± 0.1 V on the DC voltmeter.

Set the transceiver to CH 1 (low band edge), and confirm the low-end VCV is more

than 1.1 V while transmitting, and also while receiving.

PLL Reference

Set the transceiver to CH 2 (band center).

Open the “Adjust

AdjustAdjust

Adjust” window on the CE44, then select “Reference

ReferenceReference

Reference” parameter.

Press the [ENTER]key to enable programming of this parameter, use the [UP] or

[Down] arrow keys so that the frequency counter displays band center frequency

±100 Hz (for the version being aligned).

Transmitter Output Power

Set the transceiver to CH 2 (band center).

Open the “Adjust

AdjustAdjust

Adjust” window on the CE44, then select “TX Hi Power

TX Hi PowerTX Hi Power

TX Hi Power” parameter.

Press the [ENTER]key to enable programming of this parameter, use the [UP] or

[Down] arrow keys so that the power meter reading is 5 W. Confirm that the

current consumption is 2.0 A or below.

Select “TX Low Power” parameter.

Press the [ENTER]key to enable programming of this parameter, use the [UP] or

[Down] arrow keys so that the power meter reading is 1 W. Confirm that the

current consumption is 1.0 A or below.

Modulation Level

Set the transceiver to CH 2 (band center).

Inject a 1 kHz tone at 77 mVrms to the MIC jack.

Open the “Adjust

AdjustAdjust

Adjust” window on the CE44, then select “Modulation

ModulationModulation

Modulation” parameter.

Press the [ENTER]key to enable programming of this parameter, use the [UP] or

[Down] arrow keys so that the deviation meter reading is ±4.2 kHz (for 25 kHz

steps) or ±2.1 kHz (for 12.5 kHz steps) deviation.

VX-160U/180U

Alignment

Receiver

Set up the test equipment as shown for receiver alignment.

Sensitivity

Set the transceiver to CH 3 (high band edge)

Tune the RF signal generator to the same frequency of the transceiver, then set the

generator output level to 40 µV with ±3.0 kHz deviation @ 1 kHz tone modulation.

Open the “Adjust” window on the CE44, then select “Sensitivity” parameter.

Press the [ENTER]key to enable programming of this parameter, use the [UP] or

[Down] arrow keys so that the RF signal generator output level should be –7dB or

less for 12 dB SINAD.

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