MFJ-266C HF/VHF/UHF Antenna Analyzer
Instruction Manual
Version 2A
6
2012 MFJ Enterprises, Inc
4.0 FREQUENCY SELECTION
The MFJ-266C covers the
HF
region
(1.5-71 MHz)
in six bands, plus
VHF
(85-185 MHz)
and
UHF (300-490 MHz)
. Tuning and band-selection are
electronically switched for high reliability.
4.1 Variable Tuning
The
TUNE
control uses an instrumentation-grade potentiometer with a 10:1
drive reduction to ensure gradual tuning on each band. Note that a
mechanical lock is provided on the side of the TUNE knob assembly. The
lock is used to prevent accidental changes once a desired frequency is set.
Dial Lock
TUNE
4.2 Range Selection
BAND SELECT
buttons
A
and
B
are used to toggle between the
HF
,
VHF
,
and
UHF
ranges. Follow the
up/down
position prompts shown in the table
printed next to the buttons to select ranges.
A
B
BAND SELECT
BAND A B
HF X
VHF
UHF
Counter X
X
means the VHF/UHF switch can be in either position. Tuning is
continuous in the VHF and UHF ranges. The frequency readout line of the
display shows both the operating frequency in MHz and the letter of the
selected range.
Band V:
108 to 230 MHz (Airband, 2 Meters, VHF 2-Way and 1.2 Meters)
Band U:
308 to 490 MHz (Military, 70-cm, UHF 2-way)
4.3 HF-Band Selection
The
UP
and
DOWN
buttons are used to step or scroll through a selection of
six HF bands.
To step
up or down in one-band increments,
quickly tap the
appropriate switch
to initiate each change.
To scroll, press and hold the
switch down
. Most users find it easier to watch the letter designation for the
desired band rather than watch the frequency display when making a
selection:
