3 Short-Range Comms & IoT Mode
3.10 Spurious Emissions Measurement
amounts of smoothing, and with the average detector, with the Average Type set to
Power.
In those cases where the cancellation is ineffective, it nonetheless has no
undesirable side-effects. There is no significant speed impact in having Noise Floor
Extension on.
The best accuracy is achieved when substantial smoothing occurs in each point
before trace averaging. Thus, when using the average detector, results are better
with long sweep times and fewer trace averages. When using the sample detector,
the VBW filter should be set narrow with less trace averaging, instead of a wide
VBW filter with more trace averaging.
NOTE
Noise Floor Extension has no effect unless the RF Input is selected, therefore it
does nothing when External Mixing is selected.
In Modes that support Adaptive NFE, the default state of NFE is Adaptive. In
Modes that do not support Adaptive NFE, the default state of NFE is OFF. Prior to
the introduction of Adaptive NFE (firmware version A.18.00), the default state of
NFE was OFF for all Modes.
With the introduction of Adaptive NFE, the menu control is changed from On/Off to
Full/Adaptive/Off. For SCPI Backwards Compatibility, the existing SCPI command to
turn NFE on and off was retained, and a new command was added to set the state to
turn Adaptive On and Off
[:SENSe]:CORRection:NOISe:FLOor ON|OFF|1|0 is retained, default changed
to On for modes which support Adaptive NFE
[:SENSe]:CORRection:NOISe:FLOor:ADAPtive ON|OFF|1|0 is added (for
certain Modes), default=On
FULL = :CORRection:NOISe:FLOor ON plus
:CORRection:NOISe:FLOor:ADAPtive ON
Remote Command
[:SENSe]:CORRection:NOISe:FLOor ON | OFF | 1 | 0
[:SENSe]:CORRection:NOISe:FLOor?
Example
:CORR:NOIS:FLO ON
Dependencies Only appears in instruments with the NFE or NF2 license installed. In all others, the control does not
appear, but the SCPI command is accepted without error (but has no effect)
Couplings If NFE is enabled in any Mode manually, a prompt is displayed reminding you to perform the Charac-
terize Noise Floor operation if it is needed
If NFE is enabled via SCPI and a Characterize Noise Floor operation is needed, an error will be entered
in the system error queue
Preset Unaffected by Mode Preset. Turned ON at startup and by Restore Mode Defaults in Modes that
support Adaptive. Turned OFF at startup and by Restore Mode Defaults in Modes that do not support
Adaptive
State Saved No
Short Range Comms & IoT Mode User's &Programmer's Reference 1471
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