Notch Filter Operation - Icom IC-475H Instruction Manual

7-7 DATA SWITCH OPERATION
,
7-8 PASSBAND TUNING
(PBT) OPERATION
Max. CCW
rotation
Passband
7-9 NOTCH FILTER OPERATION
1) Push [NOTCH] FILTER SWITCH.
2) Adjust [NOTCH] FILTER CONTROL.
This switch allows your to freely operate digital communications
such as AMTOR or PACKET with time delay.
e The lockup time is approximately Бтзес. when using the [DATA]
SWITCH.
e The [DATA] SWITCH does not function in CW mode.
1) Connect the terminal unit to the 1С-475Н properly. See page 15
for detail.
2) Select a mode switch and push the [DATA] SWITCH.
e "DATA" appears on the FREQUENCY DISPLAY.
Passband Tuning is a system designed to electronically narrow the
bandwidth (selectivity) of frequencies that will pass through the
receive crystal filter.
Center Max. CW
position rotation
This circuit provides high attenuation at one particular frequency in
the IF passband. М may be used to reduce or eliminate interfering
heterodyne signals that fall within the passband of the receiver.
1) Push the [МОТСН] FILTER SWITCH to the ON position (IN).
2) Adjust the [NOTCH] FILTER CONTROL to minimize inter-
ference.
e Notch filter characteristics
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