Agilent Technologies 35670-90066 manual Input Noise, Window Parameters, Single Channel Phase

Specifications	Agilent 35670A
Input Noise

Input Noise

Input noise level

Flat top window, −51 dBVrms range, source impedance = 50 Ω, 32 rms averages

Above 1280 Hz

160 Hz to 1.28 kHz (6.4 kHz span)

√— <–140 dBVrms/ Hz √—

<–130 dBVrms/ Hz< % 0 >

Note: To calculate noise as dB below full scale:

Noise [dBfs] = Noise [dBVrms/Hz] + 10LOG(NEBW) – Range [dBVrms]. See ‘’Window Parameters,’’ below, for noise equivalent bandwidths (NEBW).

Window Parameters

	Uniform	Hann	Flat Top
−3 dB bandwidth †	0.125% of span	0.185% of span	0.450% of span
Noise equivalent bandwidth †	0.125% of span	0.1875% of span	0.4775% of span
Attenuation at ± 1/2 bin	4.0 dB	1.5 dB	0.01 dB
Shape factor (−60 dB BW/−3 dB BW) 716		9.1	2.6

†For 800 line displays. With 400, 200, or 100 line displays, multiply bandwidths by 2, 4, and 8, respectively. With 1600 line displays (only available in 1 or 2 channel mode), divide bandwidths by 2.

Single Channel Phase

Phase accuracy relative to external trigger ±4.0 degree

16 RMS averages, center of bin, dc coupled,

0 dBfs to −50 dBfs, 0 Hz < freq ≤ 10.24 kHz only

For Hann and flat top windows, phase is referenced to a cosine wave at the center of the time record. For the uniform, force, and exponential windows, phase is referenced to a cosine wave at the beginning of the time record.

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