Yaesu VR-5000, Руководство по эксплуатации

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VR-5000 O
PERATING
M
ANUAL
14
Basic Operation
I
NTRODUCTION
The
VR-5000
utilizes a “VFO” (Variable Frequency Oscillator) tuning system for fre-
quency selection. Two VFOs are provided, termed the “MAIN” and “SUB” VFOs in this
manual. The VFOs utilize tuning “steps” which vary between operating modes, and which
may be set by the owner according to your location and operating preferences. Fundamen-
tally, however, a VFO may simply be thought of as a tuning dial for the receiver.
Details regarding setup and operation of the
VR-5000
are found in the pages to follow.
T
URNING THE
P
OWER ON
/
OFF
Press and hold the orange
PWR
switch for one second to turn the radio on and off. The
one-second delay minimizes the chance that the radio will accidentally be turned on or off
by bumping the
PWR
switch.
A
DJUSTING THE
V
OLUME AND
S
QUELCH
1. Rotate the MAIN VOL knob to adjust the audio volume of the MAIN VFO. Rotate the
SUB VOL
knob to adjust the audio volume of the SUB VFO. Clockwise rotation of
these
VOL
knobs increases the volume level. Both VOL knobs can be rotated to adjust
the relative balance of receiver audio between the two VFOs during dual reception.
2. The VR-5000 squelch system allows you to mute the receiver’s audio output when no
signals are being received. To set the squelch, turn the
SQL
knob fully counter- clock-
wise, then turn it clockwise just past the point where the background noise is silenced.
Do not rotate the
SQL
knob much beyond this threshold point; if you do, the receiver
will not respond to weak signals.
3. Rotate the
TONE
knob to adjust the receiver’s audio characteristics. Clockwise rota-
tion of the TONE knob emphasizes the high-frequency component. The TONE knob
affects both the MAIN and SUB VFO audio.
F
REQUENCY
N
AVIGATION
Tuning DIAL
Rotating the DIAL knob allows tuning in the pre-programmed steps established for the
current receiving band. Clockwise rotation of the DIAL knob causes the VR-5000 to be
tuned toward a
higher
frequency, while counter-clockwise rotation will
lower
the receiv-
ing frequency.
If you press the [ F
] key momentarily, then rotate the
DIAL knob, frequency steps of 1 MHz
will be selected. This feature is extremely useful for making rapid frequency excursions
over the wide tuning range of the
VR-5000 .