Yaesu FT-2000D, Руководство по эксплуатации

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Page 24 FT-2000D O
PERATING
M
ANUAL
+
CLAR
BAND Keys
These keys allow one-touch selection of the desired
Amateur band (1.8 ~ 50 MHz).
What’s more, these keys may be used for direct entry
of a desired operating frequency during VFO opera-
tion.
RX CLAR Switch
Pressing this button activates the RX Clarifier, to al-
low offsetting the Main (VFO-A) receiving frequency
temporarily. Press this button once more to return the
Main receiver to the frequency shown on the main fre-
quency display field; the Clarifier offset will still be
present, though, in case you want to use it again. To
cancel the Clarifier offset, press the [
CLEAR
] button.
TX CLAR Switch
Pressing this button activates the TX Clarifier, to al-
low offsetting the Main (VFO-A) transmit frequency
temporarily.
Press this button once more to return the transmitter to
the Main (VFO-A) frequency shown on the main fre-
quency display field; the Clarifier offset will still be
present, though, in case you want to use it again. To
cancel the Clarifier offset, press the [
CLEAR
] button.
CLEAR Switch
Pressing this button clears out any frequency offset you
have programmed into the Clarifier register (thereby
setting the offset to “Zero”).
CLAR Knob
This knob tunes the Clarifier offset frequency up to
9.999 kHz.
VRF Knob
This knob tunes the passband of the VRF (Variable RF
Filter) preselector circuit for maximum receiver sensi-
tivity (and out-of-band interference rejection).
A
DVICE
:
ˆ The relative position of the VRF passband can be
observed on the Tuning Offset Indicator of the dis-
play whenever the [
VRF
] knob is turned.
ˆ When the optional RF μ Tuning Kit is connected,
this knob allows adjustment of the center frequency
of the
μ -Tuning filter passband (which is much
narrower than that of the VRF).
VRF Switch
This button turns the VRF filter on and off. While ac-
tivated, the “
” icon will appear in the FLT column
of the Receiver Configuration Indicator on the display.
A
DVICE
:
When the optional RF μ Tuning Kit is connected, press-
ing this button will engage the μ -Tuning filter. The
μ Tuning Kit provides much better RF selectivity than
any other RF filter in the Amateur industry, yielding
outstanding protection from high RF levels not far re-
moved from the current operating frequency.
F
RONT
P
ANEL
C
ONTROLS
& S
WITCHES