8.6 The cursor and zoom functions
Using the
Jog dial
, you can activate a cursor in
spectrum
analysis
mode. This cursor allows you to display the
exact frequency and signal level of a certain point on the
display. To activate the cursor, simply turn the Jog dial
and the cursor appears as a line in the spectrum display.
You can deactivate the cursor by pressing the menu key
twice. The portion of the spectrum display under the cur-
sor is drawn in inverse, so its information is preserved.
By turning the Jog dial, the cursor can be positioned freely on the display. The
readout on the big main display and the exposure limit display and demodulati-
on now ONLY belong to the current cursor position! The current frequency and
level display of the cursor are only updated
after
a complete sweep and shown
in the first (leftmost) marker field. As such, the auto marker feature is principally
disabled.
When you
press
the Jog dial after positioning the cursor, you can
zoom
into a
signal. Here, the CENTER frequency will be shifted to the indicated cursor posi-
tion and frequency, the SPAN is reduced by one half and a new sweep is initia-
ted. So, you have
zoomed
into the signal by 50%. This function can be repea-
ted as often as you wish until the desired resolution is reached. An incredibly
practical feature.
Deactivate the cursor again by pressing the menu button twice.
ATTENTION:
The cursor does NOT get erased when in HOLD mode!
Frequency
and
level
at the current cursor position
Cursor
The spectrum portion under the
cursor is drawn in inverse
8.0 Correct measurement
34
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
Summary of Contents for SPECTRAN HF-2025
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