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ADJUSTMENT 

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

Checking                   Check that the deviation in the range of  

Modulation                frequency coverage is following values. 

                                                                  ± 3.6 ~        

   ANT Con     

     WIDE           ± 3.60 ~ 4.50 kHz            ±4.5kHz     

                                             NARROW          ± 1.80 ~ 2.30 kHz            ± 1.8 ~ 

                                                                                                        ±2.3kHz 

Checking Modula-       Check that the modulation in the range of 

tion                          frequency coverage is as follows. 

 

       WIDE/NARROW            2.8 ~ 6 mV rms           2.8-6mV                 ANT Con 

                                       WIDE:±3 KHz DEV ; NARROW:±1.5 KHz  DEV            rms 

CTCSS Deviation        Connect a linear detector via the attenuator        

Adjustment               to the  antenna terminal, Set the transceiver 

                               to wide ch and CTCSS 88.5Hz.   

                               Transmit the transceiver with no input to  

                                the mic (or mic terminal)  

 

                                       Adjust. Freq.  Near Center Frequency                       Adj.Soft   ANT Con 

                                            WIDE                   ± 0.7 kHz                     ±0.7kHz  CTCS/DTCS                          

 

Checking CTCSS/       Set the transceiver with following signaling    

DTCS/2/5 TONE/         type to perform the measurements. 

DTMF DEVIATION                        DTCS    CODE 007 

                                               CTCSS   88.5 Hz 

                                              5 TONE  CCIR 11111 

                                              DTMF    # (Auto Dial Setting) 

                                              2 TONE  349.0 Hz 

                                

                                check that each version in the range of  

frequency is following values, respectively. 

 

                                         Wide CTCSS/DTCS        ± 0.50~± 0.90kHz    

±0.5-0.9kHz  

               ANT Con 

                                         Wide 2/5 TONE/         

 ± 2.40~± 3.60kHz    

±2.4-3.6kHz

 

                                                              DTMF 

                                        Narrow CTCSS/DTCS      ± 0.25~± 0.50kHz    

±.25-.50kHz

 

                                        Narrow 2/5 TONE/       ± 1.20~± 1.80kHz     

±1.2-1.8kHz

 

                                                              DTMF 

                                                                   

 

 

Summary of Contents for IC-F520

Page 1: ...RX C134 during TX Adj Freq 136 MHz RX Side 1 4V 1 4V C133 LV TX Side 1 0V 1 0V C134 Lock Voltage Set the transceiver to the 174 MHz Check and check that each value is within following values Adj Freq...

Page 2: ...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 Hi Power current is less than TX the following value in the range of frequency coverage...

Page 3: ...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 detection o...

Page 4: ...ent to the antenna terminal Set the transceiver to wide ch and CTCSS 88 5Hz Transmit the transceiver with no input to the mic or mic terminal Adjust Freq Near Center Frequency Adj Soft ANT Con WIDE 0...

Page 5: ...ssible deviation Check that the TX S N in the range of the Frequency coverage is more than the following values WIDE More than 40 dB Over 40dB ANT Con NARROW More than 34 dB Over 34dB Adjusting RX dur...

Page 6: ...rrow channels also Adjusting the This Adjustment should be perform after the S3 LEVEL RX sensitivity adjustment finished Set the signal generator following setting for wide channels Adjust Freq Near 1...

Page 7: ...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 Checki...

Page 8: ...that the AF output reaches 50 of the rated value Check that the RX S N in the range of frequency is as following values WIDE More than 40 dB Over 40dB ANT Con NARROW More than 34 dB Over 34dB SP Jack...

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