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.
1Press [MENU/ F.LOCK] and turn the MULTI control to select Menu No. 45.
2Press [
]/ [
] to select “oFF” or “on” (default is OFF).
While Menu No. 45 is ON:
1Press [FIL/ NAR].
•“WDH
2Turn MULTI control to select the desired bandwidth.
3Press [FIL/ NAR].
•“CTR
4Turn MULTI control to select the desired center frequency for the filter.
5Press [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.
Center |
|
| Filter bandwidth (Hz) |
|
| ||||
Freq. (Hz) |
|
|
|
| |||||
|
|
|
|
|
|
|
|
| |
1000 | 50 | 100 |
| 250 | 500 | 1000 |
| 1500 | 2400 |
|
|
|
|
|
|
|
|
|
|
1500 | 50 | 100 |
| 250 | 500 | 1000 |
| 1500 | 2400 |
|
|
|
|
|
|
|
|
|
|
2210 | 50 | 100 |
| 250 | 500 | 1000 |
| 1500 | 2400 |
|
|
|
|
|
|
|
|
|
|
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}.
1Press [MENU/ F.LOCK] and turn the MULTI control to select Menu No. 48.
2Press [
]/ [
] to select “64”.
3Press [MENU/ F.LOCK] to store the setting and exit the Menu mode.
4Press [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.
48
