MFJ-784B Instruction Manual
Operation Error! Main Document Only.-9
Tunable Filters Controls
The Tunable Filters knobs, left and right, adjust the center frequency (also
called the tone or pitch) and the bandwidth (also called the selectivity ) or the
lower and upper cutoff frequencies of the 5 Tunable filters selected by the
Filters switch. These filters are the LR/HR, BP, 2BP, CW and SSB filters.
These controls also adjust the two manual notch frequencies whenever the
Manual Notch button is "in."
Note:
The manual notch function uses the same controls as the main filter.
That means any time the manual notch is being used, the adjustable
filter cannot be changed.
The following chart tells you what type of adjustment is made by the left and
right Tunable Filters controls in every front panel adjustable filter position.
Mode Tunable Filters Left Tunable Filters Right
LR/HR
lowest freq. you will hear highest freq. you will hear
BP
center frequency bandwidth *
2BP
*
center frequency 1 center frequency 2
CW
center frequency bandwidth
SSB
center frequency bandwidth
Manual Notch
notch frequency 1 notch frequency 2
* The 2BP's bandwidth (or selectivity) is changed by adjusting the BP's
bandwidth before selecting 2BP.
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