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ADJUSTMENT 

Adjustment          No.        Adjustment Condition & Tuning                     Value       Ref. No. CK. Point 

 

Adjusting the           set the transceiver to the RX frequency

  

 

Squelch                     bandwidth’s narrow band center frequency. 

 

                                Set the signal generator to the settings  

                                below.                                                                                           ANT Con 

 

                                        Modulation Freq.              1kHz 

                                                  WIDE                   ± 3.5 kHz 

                                                 NARROW                 ± 1.75 kHz 

                                         SG Output Level            -14 dBu 

 

                                In this condition, using the adjustment                        Adj.Soft 

                                software, raise the squelch D/A value until                   SQL 

                                the squelch closes once, then lower the D/A 

                                value again, and adjust until the squelch  

                                opening point. 

 

Checking Squelch       Check that the squelch opening point value 

Sensitivity              in the RX frequency bandwidth is as below. 

                         

                                       Squelch Sensitivity  Less than –10 dBu     Less-10dB               ANT Con     

                          

                                Next, reduce the signal generator output  

                                and check that the squelch closes in the RX 

                                bandwidth. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for IC-F620

Page 1: ...ring RX and C134 during TX Adj Freq 400 MHz RX Side 1 0V 1 0V C133 LV TX Side 1 1V 1 1V C134 Lock Voltage Set the transceiver to the 490 MHz Check and check that all is within specification Adj Freq 4...

Page 2: ...below Hi Power 20 0 30 0W 20 30W ANT Con L2 Power 8 0 12 5W 8 12 5W L1 Power 2 0 3 0W 2 0 3 0W Current Check at Check that the in band power consumption TX is within the specifications below Hi Power...

Page 3: ...minal Connect a millivolt meter or a 600 ohm out put impedance CR oscillator to the trans ceiver s mic terminal Modulation Use the adjustment software to adjust the Balance modulation analyzer s detec...

Page 4: ...t to the antenna terminal Set the transceiver to wide ch and CTCSS 88 5Hz Transmit while making sure no input is applied to the mic or mic terminal Adjust Freq Near Center Frequency Adj Soft ANT Con W...

Page 5: ...Hz Check that the TX S N in the bandwidth is as the values below WIDE More than 40 dB Over 40dB ANT Con NARROW More than 34 dB Over 34dB Adjusting RX When there is no particular set limits set Sensiti...

Page 6: ...rrow channels also Adjusting the This Adjustment is after the RX Sencitivity S3 LEVEL Finish Set the signal generator in the following way for wide channels Adjust Freq Near Greatest Lo band F SG Inpu...

Page 7: ...z SG Output Level 14 dBu In this condition using the adjustment Adj Soft software raise the squelch D A value until SQL the squelch closes once then lower the D A value again and adjust until the sque...

Page 8: ...e so that the AF output is 50 of the rated value Check that the RX S N in the bandwidth is as the values below WIDE More than 40 dB Over 40dB ANT Con NARROW More than 34 dB Over 34dB SP Jack Checking...

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