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SYNTHESIZED
SCANNING
VFO
FV-901DM
GENERAL DESCRIPTION
The FV-901DM
external VFO for the FT-901
se:
of transceivers provides a new dimen-
sion in operating versatility. Featuring PLL synthesis
in 100 Hz steps, the FV-901DM may
be tuned by means of the main dial, or via manual or automatic scanning controls. As well,
the operator may select from as many as 40 positions of frequency memory, programmed
by a front panel pushbutton.
A memory backup feature allows the memorized frequencies
to be held even though the VFO and transceiver are turned off.
Frequency
control
may be exercised in a variety of combinations, using the FT-901DM
main dial, the FT-901DM memory circuitry, the FV-901DM
main dial, and the FV-901DM
memory
bank. Any of these components may be selected to provide control of the trans-
mit, receive, or transceive
frequency. A clarifier control on the front panel of the FV-
901DM
allows
precise tuning between
the 100 Hz synthesizer steps, or to follow a drift-
ing signal stored in memory.
The following pages will describe in detail the operation
of the FV-901DM
synthesized
scanning VFO. As this apparatus is significantly advanced over other VFO's on the market,
the operator is urged to read this manual thoroughly before attempting operation.
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