48
10 REJECTING INTERFERENCE
DSP FILTER FOR DATA COMMUNICATION
(SSB/ FM)
The DSP filter for Data Communication is designed to
improve the reception tone readability, especially for
PSK31 and other new digital modes.
1
Press
[MENU/ F.LOCK]
and turn the
MULTI
control to select Menu No. 45.
2
Press
[
]
/
[
]
to select “oFF” or “on” (default is
OFF).
While Menu No. 45 is ON:
1
Press
[FIL/ NAR]
.
•
“WDH -- nnnn” (where “nnnn” is DSP filter
bandwidth in Hz) appears.
2
Turn
MULTI
control to select the desired
bandwidth.
3
Press
[FIL/ NAR]
.
•
“CTR -- nnnn” (where “nnnn” is a center filter
frequency in Hz) appears.
4
Turn
MULTI
control to select the desired center
frequency for the filter.
5
Press
[FIL/ NAR]
to complete the settings.
The following center frequencies and bandwidth
combinations are available.
1000/ 1500 Hz is used for the PSK31 operation and
2210 Hz is used for the RTTY operation.
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4
2
Note:
While Menu No. 45 is ON, the DSP filter bandwidth {page 46}
cannot be changed.
DSP RX MONITOR
The DSP RX Monitor function temporarily cancels IF
filter selection and DSP filter settings so that you can
confirm the conditions of current reception frequency
nearby.
To use the DSP RX Monitor function, first assign the
PF key on the panel (or Mic PF keys) {page 64}.
1
Press
[MENU/ F.LOCK]
and turn the
MULTI
control to select Menu No. 48.
2
Press
[
]
/
[
]
to select “64”.
3
Press
[MENU/ F.LOCK]
to store the setting and
exit the Menu mode.
4
Press
[PF]
.
•
While pressing
[PF]
, the transceiver cancels IF
filter selection and DSP filter settings to its default
values. When you release
[PF]
, the transceiver
recovers the IF and DSP filter settings.
