Keysight M9421A - Meas Interval

3 WLAN Mode
3.6 Modulation Analysis Measurement
1.17*(Result Length+13) *(1+Guard Interval))/ Subcarrier Spacings
–
If Result Length is set to Auto, Min Value will be:
1.17*(Max Result Length+13) *(1+Guard Interval))/ Subcarrier Spacings
–
If Radio Std is 802.11ac/ah/af/ax/be:
–
If Result Length is set to Man, Min Value will be:
1.17*(Result Length+13) *(1+Guard Interval))/ Subcarrier Spacings
–
If Result Length is set to Auto, Min Value will be:
1.17*(Max Result Length+13) *(1+Guard Interval))/ Subcarrier Spacing
–
If Radio Std is 802.11b/g (DSSS/CCK/PBCC):
–
If Result Length is set to Man, Min Value will be:
Ceil (Result Length/Chip Rate) usec
–
If Result Length is set to Auto, Min Value will be:
Ceil (Max Result Length/Chip Rate) usec
Max Max is hardware dependent:
4000000 / Sampling Rate
Option B25: Sampling Rate = 45M (when info BW is 25MHz);
Option B40 or Wider: Sampling Rate = Info BW * 1.25
Meas Interval
For standard 802.11a/g/j/p (OFDM), 801.11g (DSSS-OFDM), 802.11n
/ac/ah/af/ax/be.
This parameter specifies the measurement interval (length), in symbol times, of the
portion of the OFDM burst that will be analyzed. This analyzed portion of the OFDM
burst starts at a measurement offset specified by Meas Offset.
Remote
Command
[:SENSe]:EVM:TIME:INTerval <integer>
[:SENSe]:EVM:TIME:INTerval?
Example
:EVM:TIME:INT 15
:EVM:TIME:INT?
Preset For 802.11a/g/j/p (OFDM), 801.11g (DSSS-OFDM), 802.11n/ac//ah/af/ax/be: 16 symbols
For 802.11b/g (DSSS/CCK/PBCC): 2794 chips
State Saved Saved in instrument state
Min For 802.11a/g/j/p (OFDM), 801.11g (DSSS-OFDM), 802.11n/ac/ah/af/ax/be: 1 symbols
For 802.11b/g (DSSS/CCK/PBCC): 1 chips
1007 WLAN Mode User's &Programmer's Reference