Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.5 ACP Measurement
(max dynamic
range)
improving dynamic range on a W-CDMA signal because a sharp cutoff bandpass filter is used. The
accuracy of the adjacent channel power ratio is not degraded by this method, but the absolute accuracy
of both adjacent channel power and carrier power are degraded by up to about 0.5 dB
RBW
RBW
The algorithm uses zero-span and an appropriate RBW setting to capture all of the power in the carrier
channel and the offsets. The zero-span algorithm (RBW method) is slower than the IBW method, but
greatly improves repeatability
Fast
FAST
WCDMA Mode or SA Mode with 3GPP WCDMA radio standard selected:
Provides the same method as the Integration BW method, but is optimized for speed to measure a W-
CDMA signal
SA Mode with CDMA2K radio standard selected:
Provides faster measurement using the FFT method with a limited parameter flexibility. When this is
selected, CDMA2K preset offsets are given and control of the following are unavailable:
–
BW menu
–
Sweep/Control menu except Pause/Resume
–
Trace/Detector menu
–
Carrier Setup, Offset Limit, RRC Weighting, Filter Alpha, and Noise Correction in Meas Setup menu
Fast Power
FPOWer
(Option FP2
required)
This provides faster measurement using the Hardware accelerated FFT method with a limited parameter
flexibility. When this is selected, the following parameters are not available:
–
Points and Auto Sweep Points under Sweep
–
When changing Meas Method to Fast Power, Auto Sweep Points is turned on and grayed-out
(Sweep Points will change according to the Fast Power setting)
–
When returning Meas Method to any setting other than Fast Power, Auto Sweep Points stays on
and becomes available (Sweep Points will change according to the auto sweep points calculation
algorithm)
–
Trace Type, Restart Averaging and View/Blank under Trace when Select Trace is Trace 2 or Trace3
–
Span under Frequency
–
Res BW, Video BW, Filter Type and Filter BW of Offset > Advanced dialog of Carr/Offset/Limits Config
control under Meas Setup
–
For Trigger, only Free Run, External 1 and External 2 are supported
When in microwave frequency and measurement span is > 40MHz, RF preselector must be turned off
Remote Command
[:SENSe]:ACPower:METHod IBW | IBWRange | FAST | RBW | FPOWer
[:SENSe]:ACPower:METHod?
Example
:ACP:METH IBW
:ACP:METH?
Notes FAST mode is only supported for WCDMA and C2K signals. You must be in WCDMA or SA Modes,
with 3GPP WCDMA or CDMA2K radio standard. Otherwise, a setting conflict error message is
reported
Spectrum Analyzer Mode User's &Programmer's Reference 971

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)