Icom IC-F620 Adjustment page 5

Adjustment No.
Checking TX S/N
Adjusting RX
Sensitivity
Adjustment Condition & Tuning
Connect a linear detector via the attenuator
to the antenna terminal, and set to the
conditions below.
HPF
LPF
De-emphasis OFF
Level Meter (P/P)/2
Apply a 1 kHz signal from the low frequency
oscillator to the mic terminal, and
transmit, then adjust the low frequency
oscillator output level so that the maximum
modulation is 70%.(WIDE:3.5KHz,NAR:1.75KHz)
Check that the TX S/N in the bandwidth is
as the values below.
WIDE
NARROW
When there is no particular set limits, set
the RX adjustments and signal generator
when checking to the settings below.
Modulation Freq.
WIDE
NARROW
Set the signal generator in the following
way for wide channels.
Adjust Freq. Near Greatest Lo band F.
SG Input level
Connect an 4 ohm non-inductive load and
a distortion meter to the external speaker
terminal. Adjust BPF (T1) ~ (T4) with the
adjustment software, so that the sensitivity
is at maximum.
ADJUSTMENT
50 Hz
20 kHz
More than 40 dB
More than 34 dB
1kHz
± 3.5 kHz
± 1.75 kHz
+20 dBu
Value Ref. No. CK. Point
Over 40dB
Over 34dB
Adj.Soft RSSI line
ANT Con