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ADJUSTMENT 

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

 

Checking RX               Check that the signal generator level when  

Sensitivity              the RX frequency bandwidth becomes 12 dB 

                                SINAD, is the value below. 

 

  RX Sensitivity     Less than -10 dBu         Less-10dB                ANT Con 

                                                                                                                                     SP Jack     

                                Use the same check method for Narrow  

                                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 Input level           +23 dBu 

                                        Modulation Freq.          1kHz 

                                                 WIDE                  ± 3.5 kHz 

                                   

                      

S3 SET COMMAND with the Adjustment soft 

Adj.Soft                ANT Con 

                                   

Ware.                                                                      S-METER

 

                                                                                                         S3 Level  

Adjusting the

              

Set the signal generator to the settings  

S1 LEVEL    

                

below.                                                            

 

                                         SG Output Level            -7 dBu 

 

                      

S1 SET COMMAND with the Adjustment soft 

Adj.Soft                ANT Con

 

                                   

Ware.                                                                     S-METER

 

                                                                                                        

S1 Level

 

                             

                                                                    

 

                                                                                                          

 

 

 

 

 

 

 

 

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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