Icom IC-F620 Adjustment Download Page 2

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ADJUSTMENT

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

TX Output Use adjustment software to adjust the

adjustment output to the values below.

Adj.Soft

Adj. Freq. Greatest Low Band Freq. Power

Hi Power 25.0W 25.0W Hi ANT Con

L2 Power 10.0W 10.0W L2

L1 Power 2.5W 2.5W L1

TX Output Check Check that the in-band TX output is within

the specifications 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 Less than 7.0A Less 7.0A

Checking Connect a spectrum analyzer to the ANT

Spurious terminal through an attenuator.

Set the attenuation so that the spectrum

Analyzer does not distort.

Set the transceiver to TX and when at Hi

power, check that spurious is less than the

value below in the bandwidth.

Spurious Less than –70dB of the Less than ANT Con

fundamental wave -70 dB

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...