Agilent Technologies X Series Manual page 326

Waveform Measurement
Meas Setup
Notes
Preset
State Saved
Range
Initial S/W Revision
Modified at S/W Revision
ADC Dither
Toggles the dither function On and Off. The dither function improves linearity for low level signals, at
the expense of a higher noise floor.
The reduced clipping-to-noise ratio results in higher noise, because the clipping level of the ADC
relative to the front terminals remains unchanged with the introduction of dither. The enhanced linearity
is mostly improved scale fidelity.
With dither on, the third-order distortions are usually invisible for mixer levels below –35 dBm. With
dither off, these distortions can be visible, with typical power levels of –110 dBm referred to the mixer.
Detection nonlinearity can reach 1 dB for dither off at mixer levels around –70 dBm and lower, while the
specified nonlinearity is many times smaller with dither on.
Key Path
Mode
Remote Command
Example
Notes
Preset
State Saved
Range
Backwards Compatibility SCPI
326
The dither function improves linearity for low level signals, at the expense of
a higher noise floor.
You must be in a mode that includes the Waveform measurement to use this
command. Use INSTrument:SELect to set the mode.
OFF
Saved in instrument state.
On|Off
Prior to A.02.00
A.03.00
Meas Setup, Advanced, ADC Dither
BASIC, PN, WCDMA, C2K, GSM, WIMAX OFDMA, TD-SCDMA,
1xEV-DO, DVB-T/H, DTMB (CTTB), ISDB-T, CMMB, LTE, LTETDD,
Digital Cable TV
[:SENSe]:WAVeform:ADC:DITHer[:STATe] OFF|ON|0|1
[:SENSe]:WAVeform:ADC:DITHer[:STATe]?
WAV:ADC:DITH ON
WAV:ADC:DITH?
The dither function improves linearity for low level signals, at the expense of
a higher noise floor..
You must be in a mode that includes the Waveform measurement to use this
command. Use INSTrument:SELect to set the mode.
OFF
Saved in instrument state.
Auto|Man
[:SENSe]:WAVeform:WBIF:ADC:DITHer
[:SENSe]:WAVeform:PDITher