Rohde & Schwarz R&S SMW200A - Page 503

Configuring the RF Signal
R&S
®
SMW200A
503User Manual 1175.6632.02 ─ 30
With linear scaling, the next frequency is calculated according to:
f
2
= f
1
+ step_lin
In the logarithmic scaling, the step size is determined in per cent, as a constant frac-
tion of the current frequency.
Successive frequencies are calculated as follows:
●
For f
STARt
< f
STOP
f
2
= f
1
*(1 + step_log/100)
If f
2
> f
STOP
, then f
2
= f
STOP
●
For f
STARt
> f
STOP
f
2
= f
1
/(1 + step_log/100)
If f
2
< f
STOP
, then f
2
= f
STOP
With "Shape = Triangle", the frequency values on the slope from f
STOP
to f
STARt
are the
same as on the slope from f
STARt
to f
STOP
.
If you specify the number of steps within the sweep range, the step size is adjusted
according to the following correlation:
●
For linear sweeps and f
STARt
< f
STOP
POINts
frequency
= ((f
STARt
- f
STOP
)/step_lin) +1 = (f
SPAN
/step_lin) + 1
●
For logarithmic sweeps and f
STARt
< f
STOP
POINts
frequency
= ((log f
STOP
- log f
STARt
)/log step_log) +1
If step_log changes, the value of POINts is adjusted. The f
STARt
and f
STOP
values are
retained.
8.7.2.2 Sweep Signal Shapes
The R&S SMW supports the following sweep shapes:
●
Sawtooth
The sweep sequence resembles a sawtooth. One sweep runs from start to stop
frequency, or level value respectively. Each subsequent sweep starts again at the
start value.
Figure 8-14: Sweep signal sawtooth shape
Varying the RF Signal in List or Sweep Mode