Preset Passband Characteristics; Audio Peak Filter In The Cw Mode; Turning On/Off Audio Peak Filter; Switching The Passband Characteristics - Kenwood TS-890S Instruction Manual

Preset Passband Characteristics

The frequently-used filter settings (high cutoff, low cutoff and
WIDTH/SHIFT) can be preset according to the style in which this
transceiver is used.
1 Press and hold [IF FIL] to display the RX Filter
screen.
.
2 Press [IF FIL] or F2 [FILTER] to select an RX filter.
3 Press F6 [FIL SET].
The current filter settings (high cutoff, low cutoff and WIDTH/
SHIFT) are stored as the preset values.
• When preset values are applied, the values will be
highlighted in the display for approximately 0.5 seconds.
• Pressing F7 [FIL CLR] restores the passband width
changed using the [HI/SHIFT] and [LO/WIDTH] controls to
the preset value.
4 Press and hold F [IF FIL] or press [ESC] to end the
process.

Audio Peak Filter in the CW Mode

During reception in the CW mode, if the signal intelligibility
deteriorates due to noise or other reasons, allowing the RX signal
to pass through the bandwidth with the pitch frequency as the
center frequency helps to improve the intelligibility of the RX signal.

Turning ON/OFF Audio Peak Filter

1 Select CW mode.
2 Press F [APF].
• Pressing F [APF] each time toggles the audio peak filter of
the selected band between ON and OFF.
• When audio peak filter is on, "ON" is displayed on the key
guide. "OFF" is displayed when the audio peak filter is turned
off.
.
REJECTING INTERFERENCE 6

Switching the Passband Characteristics

3 types frequency passbands are available for selection for the
audio peak filter.
1 Select CW mode.
2 Press and hold F [APF] to display the audio peak
filter (APF) screen.
.
3 Press F2[
]/ F3[
Wide (320Hz)/ Medium (160Hz) (default)/
Setting Value
Narrow (80Hz)
4 Press and hold F [APF] or press [ESC] to end the
process.

Shifting the Passband Width

Shifting the passband width of the audio peak filter helps to avoid
interference with nearby frequencies.
1 Select CW mode.
2 Press and hold F [APF] to display the audio peak
filter (APF) screen.
.
3 Press F2[
]/ F3[
width to be shifted.
4 Press F4[ SHIFT] or F5[SHIFT
[MULTI/CH] control to shift the passband width.
Setting Value -200 to 0 (default) to +200 [Hz] (5-step)
• The shift amount of the passband width is ±200 Hz with the
pitch frequency as the center frequency.
• The selected passband width for the audio peak filter shifts
from the pitch frequency toward a higher or lower bandwidth.
5 Press and hold F [APF] or press [ESC] to end the
process.
] to select a passband width.
] to select the passband
], or turn the
6-5