Vertex Standard GX1256S Manuel utilisateur

FCC ID: K6630053X30

IC ID: 511B-30053X30

Alignment

1/7

Vertex Standard Co,. Ltd.

GX1256S Alignment

The GX1256S has been carefully aligned at the factory for the specified performance

across the marine band.

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

Standard Horizon representative, or the warranty policy may be voided.

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 are replaced, 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 Standard Horizon

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 Standard Horizon 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, Standard Horizon, a division of VERTEX STANDARD, must

reserve 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 the need for 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.

FCC ID: K6630053X30

IC ID: 511B-30053X30

Alignment

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Vertex Standard Co,. Ltd.

Required Test Equipment

RF Signal Generator with calibrated output level at 200 MHz

Deviation Meter (linear detector)

AF Millivoltmeter

SINAD Meter

Inline Wattmeter with 5% accuracy at 200 MHz

Regulated DC Power Supply: 13.8 VDC, 10A

50-ohm Non-reactive Dummy Load: 30W at 200 MHz

Frequency Counter: >0.1 ppm accuracy at 200 MHz

AF Signal Generator

DC Voltmeter: high impedance

VHF Sampling Coupler

AF Dummy Load: 4 Ohms, 10 W

Oscilloscope

Spectrum Analyzer

GX1255S Marine Transceiver

Alignment Preparation & Precautions

A dummy load and inline wattmeter must be connected to the main antenna jack in all

procedures that call for transmission. 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, if 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°C

and 30°C (68°F and 86°F). When the transceiver is brought into the shop from hot or cold

air it should be allowed some time for thermal equalization with the environment before

alignment. If 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 this procedure are based on 0 dBµ = 0.5 µV (closed

circuit).

Overview of Test Mode

The test mode has been build in the microprocessor in order to adjust and confirm the

performance of transceiver.

The purpose is to adjust transceiver simply and to confirm the performance of

transceiver smoothly.

FCC ID: K6630053X30

IC ID: 511B-30053X30

Alignment

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Vertex Standard Co,. Ltd.

(a) Expansion channels “EXP01 - EXP07” will be set as follows:

DISPLAY RX Frequency TX Frequency SCAN Channel

EXP01 156.050 MHz 156.050 MHz X

EXP02 157.425 MHz 157.425 MHz X

EXP03 163.275 MHz 158.675 MHz X

EXP04 155.050 MHz 155.050 MHz O

EXP05 162.025 MHz 162.025 MHz X

EXP06 163.575 MHz 158.975 MHz X

EXP07 159.050 MHz 159.050 MHz X

WX10 163.275 MHz --- O

(B) In CH70, every time you are in transmit mode, (every time you press PTT), the

following test tone can be outputted:

1st transmission: 1300 Hz

2nd transmission: 2100 Hz

3rd transmission: No modulation

4th transmission: Synthetic tone of 1300 Hz and 2100 Hz

5th transmission: Return to 1st transmission

Starting Test Mode

Confirm that PWR/VOL switch is off, and short the TEST points. Turn on the PWR/VOL

switch while press and holding the DIST and DW keys.

Confirmation of VCO

-- Confirmation --

Connect the DC voltmeter to the test point (LOCK TP).

Use the UP/DOWN key to set the channel to EXP04, confirm that voltage on the test

point is over 1.0 V in the receive and transmit mode.

Use the UP/DOWN key to set the channel to EXP05, confirm that voltage on the test

point is below 5.0 V in the transmit mode.

Use the UP/DOWN key to set the channel to EXP06, confirm that voltage on the test

point is below 5.0 V in the receive mode.

Adjustment and Confirmation of Transmit Power

Adjust power at high and low in the transmit mode, and confirm power in the specified

bandwidth.

-- Adjustment --

Connect the wattmeter and 50-ohm dummy load to the antenna jack.

FCC ID: K6630053X30

IC ID: 511B-30053X30

Alignment

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Vertex Standard Co,. Ltd.

Use the H/L key to set transceiver to high power and set the channel to CH16. With

the PTT switch pressed, adjust VR1001 so that RF power is 25 W.

Use the H/L key to set transceiver to low power and set the channel to CH16. With

the PTT switch pressed, adjust VR1002 so that RF power is 0.8 W.

-- Confirmation --

Use the H/L key to set transceiver to high power and set the channel to EXP01. With

the PTT switch pressed, confirm that RF power is between 23 W and 27 W.

Use the H/L key to set transceiver to low power. With the PTT switch pressed,

confirm that RF power is between 0.5 W and 1.0 W.

As descried above, confirm RF power at EXP04 and EXP05. Set transceiver to high

power and confirm that RF power is between 23 W and 27 W. Set transceiver to low

power and confirm that RF power is between 0.5 W and 1.0 W.

Adjustment of PLL Frequency

Adjust the frequency in the transmit mode and local frequency in the receive mode.

-- Adjustment --

Setup the test equipment as shown below.

Set the channel to CH16. With the PTT switch pressed, adjust TC1001 so that RF

frequency is 156.80000 MHz ± 50 Hz.

Adjustment and Confirmation of Deviation

Adjust deviation in the transmit mode.

-- Adjustment --

Setup the test equipment as shown below.

Set the channel to CH16.

Set the output of the audio generator (AG) to 1 KHz and 150 mV.

With the PTT switch pressed, adjust VR1003 so that the maximum deviation is ±4.5

KHz.

Decrease the output level of AG by 20 dB (the output level of AG should be 1/10).

With the PTT switch pressed, adjust the output level of AG so that the deviation is ±3.0

KHz.

Increase the output level of AG by 20 dB (10 times of the output level of AG) which is

supposed to be Detective Modulation Level ±4.5 KHz).

Repeat steps 3 though 6 three times so that deviation is ±3.0 KHz and the maximum

deviation is ±4.4 KHz to ±4.6 KHz.

-- Confirmation --

Set the output of the AG to 1 KHz and 150 mV.

Set the channel to EXP01, confirm that maximum deviation is between ±4.3 KHz and

FCC ID: K6630053X30

IC ID: 511B-30053X30

Alignment

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Vertex Standard Co,. Ltd.

±5.0 KHz.

Set the channel to EXP02, confirm that maximum deviation is between ±4.3 KHz and

±5.0 KHz.

Set the channel to EXP04, confirm that maximum deviation is between ±4.0 KHz and

±5.0 KHz.

Set the channel to EXP05, confirm that maximum deviation is between ±4.0 KHz and

±5.0 KHz.

Adjustment of Receiver Front-end

Adjust the receiver front-end coil.

-- Adjustment --

Setup the test equipment as shown below.

Set the center frequency of the spectrum analyzer to 159.00 MHz, set SPAN to 20.00

MHz, set RBW and VBW to 30 KHz, and set SWP to 56 ms.

Adjust T1001, T1002, T1003, T1004, and T1005 until the wave form shown in below is

obtained.

Note: Adjust the output of the tracking generator so that RF AMP and spectrum analyzer

will not saturate.

Figure shows the reference wave form. The wave form varies with measuring instruments.

It is impotent to take the lowest possible value at the stop band near 150 MHz and the

highest possible value at the band near 156 MHz.

Each coil shall be adjusted at the range between the initial condition and right and left

revolving.

GX1255S-FRONT-END

ATTE N 20 dB

RL 10.0dBm 10dB/

CENTER 159.00 MHz

*RBW 30 kHz VBW 30 kHz

SPAN 20.00 MHz

SWP 56.0 ms

FCC ID: K6630053X30

IC ID: 511B-30053X30

Alignment

6/7

Vertex Standard Co,. Ltd.

Confirmation of Weather Alert Tone

In the weather channel mode, when transceiver receives the specific emergency tone

(1050 Hz), weather alert tone will be output (Weather Alert Operation). The Weather Alert

mode will be active when a NOAA weather channel is in memory and radio is in memory

scan or P-scan mode.

-- Confirmation --

Connect the standard signal generator (SSG) to the antenna jack.

Squelch position set to tight.

Press the SCAN key and start to Memory Scan mode.

Set the SSG to 163.275 MHz (WX10) and output level of the SSG to 20 dBµV, ±3.0

KHz deviation with 1050 Hz tone modulation.

Set the output of the SSG to ON.

Confirm that the channel of transceiver stops at WX10 and the transceiver outputs the

weather alert tone (1050 Hz).

Confirmation of receiver NMEA data

Input NMEA format data output from GPS receiver to NMEA terminal A of transceiver and

display it to the LCD of the transceiver.

NMEA format data output from GPS receiver is applied to NMEA terminal of transceiver’s

option connector and LCD of transceiver will show data.

-- Confirmation --

Setup the test equipment as shown below.

Press and hold the H/L key, confirm that the position data is displayed on the LCD of

transceiver.

Confirmation of DSC Operation

-- Confirmation --

Prepare the confirmation transceiver (GX1255S).

Input below data to the confirmation transceiver in advance.

-Input “TEST” to NAME of INDIVIDUAL DIRECTORY

-Input “123456789” to MMSI of INDIVIDUAL DIRECTORY

-Input “123456780” to local MMSI

-Channel 13 in U.S.A. mode

Setup the test transceiver as follows:

-Channel 21 in U.S.A.

In 3 seconds, send the INDIVIDUAL CALL from the confirmation transceiver.

Confirm that the test transceiver receives the INDIVIDUAL CALL from the confirmation

transceiver and outputs the beep.

Press the CALL/SET key of the test transceiver and turn off the beep.

FCC ID: K6630053X30

IC ID: 511B-30053X30

Alignment

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Vertex Standard Co,. Ltd.

Simultaneously, confirm that “123456780” of confirmation transceiver’s MMSI is

displayed in the LCD of the test transceiver.

Confirm that the confirmation transceiver receives the response from the test

transceiver and outputs beep.

Press the CALL/SET key of the confirmation transceiver and turn off the beep.

Simultaneously, confirm that “TEST” of test transceiver’s MMSI is displayed in the LCD

of the confirmation transceiver.

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