Anritsu 680XXC, Руководство по эксплуатации, Страница: 63 / 241

The step size range is 1 kHz (0.1 Hz with Option 11)
to the full frequency range of the signal generator;
the number of steps range is 1 to 10,000. If the step
size does not divide into the frequency range, the
last step is truncated.
In logarithmic step sweep, step size increases loga-
rithmically with frequency and is determined by a
logarithmic curve fitted between the sweep start
and stop frequencies and the number of steps. The
number of steps range is 1 to 10,000.
The dwell time-per-step of the step sweep can be set
for any time in the range of 1 ms to 99 sec. When
dwell-time-per-step and step size or number of steps
is set, the sweep time equals dwell-time-per-step
times the number of steps plus the total phase-
locking time for all step frequencies. If sweep time is
set, then dwell-time-per-step is the result of the
sweep time divided by the number of steps. In this
case, the resultant minimum dwell time must be
³
10 ms to allow for phase-locking of each step fre-
quency. The sweep time of the step sweep can be set
for any time in the range of 20 ms to 99 sec.
To go to the Step Sweep Ramp menu (below) from
the Step Sweep menu, press
Sweep Ramp .
This menu lets you set the dwell time, the step size
in linear step sweep, the number of steps, and go to
the additional step sweep ramp menu (to set the
sweep time, select log or linear sweep, and select a
sweep trigger).
Press Dwell Time to open the dwell time-per-step
parameter.
Press Step Size to open the step size parameter.
Press Num of Steps to open the number of steps
parameter.
3-30 681XXC OM
LOCAL (FRONT SWEEP FREQUENCY
PANEL) OPERATION OPERATION
RANGE
This error message is displayed
when (1) the step size value entered
is greater than the sweep range, (2)
the number of steps entered results
in a step size of less than 1 kHz
(0.1 Hz with Option 11), or (3) the
sweep time entered divided by the
number of steps entered results in a
dwell time of <10 ms. Entering valid
values will clear the error.