Commands Listed in Alphabetical Order
Related Commands
HORizontal:MA
In:REFPoint, HORizontal:MAIn:TOFPoint?, HORizontal:
MAIn:TOLPoint?
Arguments
NR3 is the horizontal position value for the Main timebase. The range is from a
typical value of 19 ns to 50 ms. The minimum value will be equal to or greater
than the insertion delay (see bulleted item above).
Examples
HORIZONTAL:MAIN:POSITION 1.0E–7 sets the horizontal position for the
Main timebase to 100 ns.
HORIZONTAL:MAIN:POSITION? might return HORI ZONTAL:MAIN:POSI TION
95.0000000000E–009
, indicating that the horizontal position for the Main
timebase is set to 95 ns.
HORizontal:MAIn:RECordlength
This command sets or queries the record length for the Main timebase. This is
equivalent to selecting MainTB and then setting a value for the Record Length
control in the Timebase section of the Horizontal Setup dialog box.
The instrument displays the waveform within the 10 horizontal divisions on
screen. The values you can set for record length are 20, 50, 100, 250, 500, 1000,
2000, and 4000 s amples. The default is 500 samples.
Because the waveform must display within 10 horizontal divisions, not all record
length settings are valid at all horizontal scales. More specifically:
SI (sample interval) = TD (Time Duration) / RL (Record Length in samples)
TD = 10 divs (window) x Horizontal scale (Time/div)
If RL or TD vary, SI varies to acc ommodate up to highest sample rate.
SI is limited to its lowest value (10 fs). Record length cannot increase for certain
scale values, so that SI does not decrease below the 10 fs limit. The equation
becomes:
Max RL = (10 x Horizontal scale) / SI, with div x sec/div x samples/sec, which
yields samples (10 divs x sec/div) / Min SI (sec/sample).
For example, at 1 ps/div and 10 divisions, the record length must be ≤1000.
Group
Horizontal
Syntax
HORizontal:MAIn:RECordlen gth <NR1>
HORizontal:MAIn:RECordlen gth?
2-174 DSA/CSA/TDS8X00/B Series Programmer Manual
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