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WIDE BAND SWEEP
SWEEP, or wide band sweep, describes a procedure whereby the
F-SCAN2
issues
successive frequencies, changing in small increments, which are each active for a default
‘Delay’ - time of about 20 ms. This time element can be adjusted by the user. SWEEP can
be used with all outputs at any amplitude. To avoid problems, please read
Adjustment of
amplitude
.
The ‘frequency beam’ begins at a starting point (lower frequency limit) defined by the user
and moves to a turning point (upper frequency limit) defined by the user as well. It turns
around and moves back ‘downhill’ to the starting point only to turn around and go uphill
again - and so forth - until the TIMER stops.
This procedure can be used to prepare a user for an intended DIRP analysis if the lower
and upper limit’s are set to define the same range as planned for the DIRP. The standard
application time for SWEEP is 20 to 30 minutes. If the default ‘Delay’ – time is increased
each frequency element will run longer.
The user wants to perform a ‘wide band SWEEP’. The tab
SETUP
has
been touched in order to define the duration, the frequency range to
cover and the size of each step
(DELTA F).
Make sure to
adjust the amplitude to the sensitivity of a user
prior to an application of
low frequencies with a square wave form.
A touch on the upward arrow increases the time each frequency increment is active
(Delay).
A touch on “STOP” ends the application and on “PAUSE” interrupts it.
- Touch the icon
, input the time and
confirm with ‘E’.
- Touch “F MAX” and define the upper limit (turn
around point) of the range for the SWEEP
- Touch “F MIN” and define the lower limit.
- Touch “DELTA F” and define it
- Touch the tab THERA, it’s window is displayed
- Touch “SWEEP”. The application starts right
away and the window on the left is displayed.
The SWEEP starts at the lower limit with a sine
wave output signal. The wave form can be
changed to FULL WAVE square with a touch on
it’s symbol – and to DC-OFFSET if the switch on
the right side panel is set to it’s bottom position.
