Keysight M9421A - Auto Couple

3 WLAN Mode
3.6 Modulation Analysis Measurement
Value SCPI Unit of
returned
Notes
Max Packet
Length
:CALCulate:EVM:LEVel:TIME?
:CALC:EVM:LEV:TIME?
second Queries the max
packet length
Max
Symbol/Chip
Used
:CALCulate:EVM:LEVel:POINt?
:CALC:EVM:LEV:POIN?
None Queries the
number of the
max symbol/chip
used in the burst.
For 11b/g, this
value is the total
number of chips.
For OFDM format,
this value is the
total number of
symbols
Auto Couple
Immediately puts all Auto/Man functions into Auto. Auto Couple is confined to the
current measurement only. It does not affect other measurements in the Mode.
In the Auto state, Auto/Man functions are said to be “coupled”, meaning their values
change as you make changes to other values in the measurement. This helps ensure
accurate measurements and optimum dynamic range. Auto Couple is an immediate
action function, and when it is executed, all the Auto/Man controls for the current
measurement are set to Auto, and all measurement settings coupled to the
Auto/Man parameters are automatically set to their optimal values.
For further details of measurement-specific settings (if any), see "Measurement-
Specific Details" on page 978 below.
Remote
Command
:COUPle ALL
Example
:COUP ALL
Backwards
Compatibility
SCPI
:COUPLE ALL | NONE
Backwards
Compatibility
Notes
:COUP:NONE puts all Auto/Man parameters in manual mode, decoupling all the coupled instrument
parameters. It is retained for backwards compatibility and is not recommended for making
measurements or new designs
All Auto/Man parameter couplings in the measurement are set to Auto. This
includes couplings that may be unavailable or grayed-out due to the current state.
For example, in the Swept SA measurement, there is no Auto/Man coupling for RBW
while in Zero Span. Nonetheless, if Auto Couple were executed while in Zero Span, it
977 WLAN Mode User's &Programmer's Reference