Icom IC-F121S Adjustment Download

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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 50.0W 50.0W Hi ANT Con

L2 Power 10.0W 10.0W L2

L1 Power 5.0W 5.0W L1

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

the specifications below.

Hi Power 40.0~60.0W 40-60W ANT Con

L2 Power 20.0~30.0W 20-30W

L1 Power 4.0~6.0W 4.0-6.0W

Current Check at Check that the in-band power consumption

TX is within the specifications below.

Hi Power Less than 14.0A Less 14A

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-F121S

Page 1: ...uring RX and C133 during TX Adj Freq 174 MHz RX Side 3 5V 3 5V C134 LV TX Side 3 5V 3 5V C133 Lock Voltage Set the transceiver to the 136 MHz Check and check that all is within specification Adj Freq...

Page 2: ...below Hi Power 40 0 60 0W 40 60W ANT Con L2 Power 20 0 30 0W 20 30W L1 Power 4 0 6 0W 4 0 6 0W Current Check at Check that the in band power consumption TX is within the specifications below Hi Power...

Page 3: ...nal 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 detecti...

Page 4: ...to the antenna terminal Set the transceiver to wide ch and CTCSS 151 4Hz 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: ...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 16 5 dBu In this condition using the adjustment Adj Soft softw...

Page 7: ...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...