Commands Listed in Alphabetical Order
RF:SCAle
This command specifies the overall vertical scale setting of the frequency domain
window. The lower limit is 0.1 dB/division. The upper limit is 100dB/division.
The vertical
scale is adjustable in a 1–2–5 sequence.
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
Group
RF
Syntax
RF:SCAle <NR3>
RF:SCAle?
Arguments
<NR3> is a floating point number.
Examples
RF:SCAle 10 sets the vertical scale to 10 dB/division.
RF:SCAle? might return 10.000, indicating that the vertical scale has been set
to 10 dB/division.
RF:SPAN
This command specifies the span setting. The span is the range of frequenciesthat
can be observed around the center frequency. This is the width of the frequency
domain trace, which is equal to the stop frequency minus the start frequency.
The maximum span varies according to the oscilloscope model. For the
4000 series models, the maximum span is either 3 GHz or 6 GHz. For the
MDO3000 series models, the maximum span matches the analog bandwidth
rating; however, if the MDO3SA option is installed, then the maximum span
is 3 GHz.
NOTE. For the parameters RF:STARt, RF:STOP, RF:FREQuency and RF:SPAN,
when any one of the parameters is changed, the following relationship is enforced:
START = FREQ – SPAN/2
STOP = FREQ + SPAN/2
FREQ = (START + STOP)/2
SPAN = STOP – START
Conditions
MDO3000, MDO4000/B, or MDO4000C models with option SA3 or SA6 only.
MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual 2-581
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