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FCC ID: K6630483X3D 

IC: 511B-30483X3S 

Alignment 

1/5

 

Vertex Standard Co., Ltd. 

GX1600  Alignment 

 

The 

GX1600

 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. 

 

Summary of Contents for GX1600

Page 1: ...e 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 circu...

Page 2: ...orrect 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 ...

Page 3: ...nthetic tone of 1300 Hz and 2100 Hz 2nd transmission 1300 Hz 3rd transmission 2100 Hz 4th transmission No modulation 5th transmission Return to 1st transmission C Scan the channels between EXP03 and EXP04 in the SCAN mode D In the test mode a transmit time out timer function TOT becomes off E A user s MMSI is set to 123456789 for DSC tests temporarily Starting the Test Mode Press the PWR switch wh...

Page 4: ...he PTT key to set the power to 0 8 0 1W Press SET key to fix the alignment data Adjustment of the Maximum Deviation Connect the linear detector to the antenna jack and connect the AF signal generator to the microphone jack Set the AF signal output level to 200mVrms at 1kHz Press the ITEM key till 02 Devi is displayed Press or keys while pressing the PTT key to set the deviation to 4 4 0 1kHz Press...

Page 5: ...onnect the RF signal generator to the antenna jack Set the output frequency at 156 5250MHz with standard modulation 3 0kHz deviation 1kHz modulation Set the output level to 4dBµ Press the ITEM key till 06 CH70 SQL is displayed Press GET key to obtain the DSC squelch threshold level Press SET key to fix the alignment data Adjustment of DC VOLT Set the DC power supply to 13 8VDC Press the ITEM key t...

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