Keysight M9421A - Page 827

3 WLAN Mode
3.6 Modulation Analysis Measurement
:FETCh:EVM[n]?
:READ:EVM[n]?
:MEASure:EVM[n]?
Remote Command Results for Modulation Analysis Measurement
When Radio Std is 802.11ac/ax 80+80MHz, these measurement results are also for
one channel. Using SCPI :CALCulate:EVM:SEGM to specify that these contents are
the first segment results or the second segment results.
For Radio Std = 802.11a/g/j/p (OFDM), 801.11g (DSSS-OFDM),
802.11n/ac/ah/af/ax/be
Index: n Results Returned
0 Returns unprocessed I/Q trace data of Capture Interval, as a series of trace point values. The I values are
listed first in each pair, using the 0 through even-indexed values. The Q values are the odd-indexed values
1 (or not
specified)
Returns the following 60 comma-separated scalar results
Result 41 and 42 are -999, reserved for 802.11b/g (DSSS/CCK/PBCC);
Result 44 and 45 are for 802.11a/g/j/p (OFDM), 802.11g(DSSS-OFDM), 802.11n, 802.11ac, 802.11ax,
802.11af and 802.11be;
Result 44 and 45 are -999 for 802.11ah
“Avg” means the average of the individual measurements when averaging is on
“Max” means the maximum of the individual measurements when averaging is on
The following are 60 scalar results:
1.
RMS EVM Max (dB)
2.
RMS EVM Avg (dB)
3.
Peak EVM Max (dB)
4.
Peak EVM Avg (dB)
5.
Max Peak EVM Index
6.
Peak EVM Index ***
7.
Frequency Error Max (Hz)
8.
Frequency Error Avg (Hz)
9.
Frequency Error Max (ppm) *
10.
Frequency Error Avg (ppm) *
11.
Symbol Clock Error Max (ppm)
12.
Symbol Clock Error Avg (ppm)
13.
I/Q Origin Offset Max (dB)
14.
I/Q Origin Offset Avg (dB)
827 WLAN Mode User's &Programmer's Reference