background image

FCC ID: K6630323X30 

   

IC ID: 511B-30323X30 

Alignment 

2/4 

Vertex Standard Co., Ltd.

 

in place. Also, the test equipment must be thoroughly warmed up before beginning. 
 
Set up the test equipment as shown below for transceiver alignment, apply 7.4 VDC power 
to the transceiver. 
 

Notes: signal levels in dB referred to in alignment are based on 0 dBµ = 0.5 µV 
(closed circuit). 

 

PLL Section 
PLL Reference Frequency 

ˆ

  Connect the wattmeter, dummy load, and frequency counter to the antenna jack. 

ˆ

  Set the transceiver to CH16 (156.800 MHz) then turn the transceiver off. 

ˆ

  Press and hold in the 

PTT

  ,

 [SQL]

, [

] and [

] key while turn the transceiver on to 

enter the alignment mode. 

ˆ

 Press 

the 

[

] or [

] key to select the display to [rEF xx]. 

ˆ

 Press 

the 

[

MEM

] key to enable adjustment of the PLL Reference Frequency. 

ˆ

 Press 

the 

PTT

 key to transmit the transceiver, if necessary, press the [

] or [

] key to 

adjust the frequency so the counter frequency is 156.800 MHz (±100 Hz). 

ˆ

 Press 

the 

[

MEM

] key to save the new setting. 

ˆ

  Press and hold the [

PWR

] key for 2 seconds to turn the transceiver off. 

 

Receiver Section 
Squelch Hysteresis Adjustment 

ˆ

  Connect the Radio Tester to the antenna jack. 

ˆ

  Set the transceiver to CH16 (156.800 MHz) then turn the transceiver off. 

ˆ

  Press and hold in the 

PTT

 ,

 [SQL]

 , [

] and [

] key while turn the transceiver on to 

enter the alignment mode. 

ˆ

 Press 

the 

[

] or [

] key to select the display to [ HS xx].   

ˆ

 Press 

the 

[

MEM

] key to enable adjustment of this Alignment Mode. 

ˆ

 Press 

the 

[

] or [

] key to adjust the hysteresis level. 

ˆ

 Press 

the 

[

MEM

] key to save the new setting. 

 

Squelch Threshold Adjustment 

ˆ

  Adjust the Radio Tester output level -12 dBµ (with a standard FM modulation: ±3.0 kHz 

deviation @ 1 kHz) at 156.800 MHz. 

ˆ

 Press 

the 

[

] or [

] key to select the display to [ TH xx]. 

ˆ

 Press 

the 

[

MEM

] key to read the Squelch Threshold data. 

ˆ

 Press 

the 

[

MEM

] key to save the new setting. 

 

Squelch Tight Adjustment 

ˆ

  Adjust the Radio Tester output level -4 dBµ (with a standard FM modulation: ±3.0 kHz 

deviation @ 1 kHz) at 156.800 MHz. 

ˆ

 Press 

the 

[

] or [

] key to select the display to [TI xxx]. 

ˆ

 Press 

the 

[

MEM

] key to read the Squelch Tight data.   

ˆ

 Press 

the 

[

MEM

] key again to save the new setting. 

ˆ

  Press the hold the [

PWR

] key for 2 seconds to turn the Transceiver off. 

   

Transmitter Section 
TX Power Adjustment (normal Power) 

ˆ

  Connect the wattmeter and dummy load to the antenna jack. 

ˆ

  Set the transceiver to CH16 (156.800 MHz) with “normal” power mode, and then turn 

the transceiver off. 

ˆ

  Press and hold in the 

PTT

  ,

 [SQL]

, [

] and [

] key while turn the transceiver on to 

Summary of Contents for HX750S

Page 1: ...nts 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 interactio...

Page 2: ...enna jack Set the transceiver to CH16 156 800 MHz then turn the transceiver off Press and hold in the PTT SQL and key while turn the transceiver on to enter the alignment mode Press the or key to select the display to HS xx Press the MEM key to enable adjustment of this Alignment Mode Press the or key to adjust the hysteresis level Press the MEM key to save the new setting Squelch Threshold Adjust...

Page 3: ...he transceiver to CH16 156 800 MHz with Low power mode and then turn the transceiver off Press and hold in the PTT SQL and key while turn the transceiver on to enter the alignment mode Press the or key to select the display to n PO xx Press the MEM key to enable adjustment of this Alignment Mode Press the PTT key to transmit the transceiver if necessary press the or key to adjust the output power ...

Page 4: ...nter the alignment mode Press the or key to select the display to n OD xx Press the MEM key to enable adjustment of this Alignment Mode Press the PTT key to transmit the transceiver if necessary press the or key to adjust the deviation to 4 2 kHz 0 2 kHz Press the MEM key to save the new setting Press and hold the PWR key for 2 seconds to turn the Transceiver off ...

Reviews: