Specifications

Chapter 2 Command System RIGOL
M300 Programming Guide 2-143
[SENSe:]FREQuency:RANGe:LOWer
[SENSe:]PERiod:RANGe:LOWer
Syntax [SENSe:]FREQuency:RANGe:LOWer {<frequency>|MIN|MAX}[,(@<ch_list>)]
[SENSe:]FREQuency:RANGe:LOWer? [{(@<ch_list>)|MIN|MAX}]
[SENSe:]PERiod:RANGe:LOWer {<frequency>|MIN|MAX}[,(@<ch_list>)]
[SENSe:]PERiod:RANGe:LOWer? [{(@<ch_list>)|MIN|MAX}]
Description Set or query the AC filter parameter of the frequency or period measurements on the
specified channels.
Parameters
Name
Type
Range
Default
<frequency> Numeric
Any numeric value between MIN and
1000000. The final AC filter is decided by
the “
Principle of setting with samller
value
”.
The standard values of the range:
{3|20|200}
Wherein: MIN=3Hz, MAX=200Hz.
20Hz
<ch_list>
Channel
List
One or more channels (only for the
multiplexer channels), the rules are as
follows:
(@101): channel 01 on the module in
Slot1;
(@101:103): channel 01 through 03 on the
module in Slot1;
(@101:103,301): channel 01 through 03
on the module in Slot1 and channel 01 on
the module in Slot3.
If the
parameter is
omitted, this
command will
be applied to
the whole scan
list.
Explanation  The CONFigure:FREQuency (CONFigure:PERiod) or MEASure:FREQuency?
(
MEASure:PERiod?) command automatically selects the 20 Hz AC filter.
 During the measurement, the filter type is determined by the frequency of the input
signal of the current channel as shown in the table below.
Input Frequency
AC Filter Type
3 Hz to 300 kHz
3 Hz (slow)
20 Hz to 300 kHz
20 Hz (medium)
200 Hz to 300 kHz
200 Hz (fast)
 The instrument selects the 20 Hz AC filter after a Factory Reset (send the *RST
command). An Instrument Preset (send the
SYSTem:PRESet command) or Card Reset
(send the SYSTem:CPON command) does not affect the current AC filter parameter.
Return
Format
The query returns the AC filter parameter in scientific notation for each channel specified.
Multiple return values are separated by commas.
Example FREQ:RANG:LOW 200,(@301)
FREQ:RANG:LOW? (@301)
The query returns 2.000000000E+02.
You can replace FREQ with PER to set or query the AC filter parameter of the period
measurements on the specified channels.
Related
commands
SENSe Command Subsystem
CONFigure:FREQuency
MEASure:FREQuency?
CONFigure:PERiod
MEASure:PERiod?
[SENSe:]FUNCtion