Data accuracy enhancement, Data averaging

HP 8753ET/ES supplemental characteristics (continued)

Sweep trigger

Set to either continuous, single, group sweep, or exter- nal trigger. Set external trigger to take a complete sweep or to measure individual points in a frequency, power or list sweep.

Power

Set source power from -20 to +5 dBm for the HP 8753ET1 or from -85 to +10 dBm for the

HP 8753ES2. Power slope can be set in dBm/GHz.

Power meter calibration

Select continuous leveling or use a correction table to modify source power. The correction table is created with an initial single sweep. Make single or multiple power meter readings at each frequency.

Data accuracy enhancement

Measurement calibration

Measurement calibration significantly reduces mea- surement uncertainty due to errors caused by system directivity, source and load match, tracking, and crosstalk. Full two-port calibration removes all the sys- tematic errors to obtain the most accurate measure- ments.

Calibration types available

• Frequency response

Simultaneous magnitude and phase correction of fre- quency response errors for either reflection or trans- mission measurements.

• Response and isolation

Compensates for frequency response and directivity (reflection) or frequency response and crosstalk errors.

• Enhanced response calibration

Corrects for frequency response and source match for transmission measurements, and provides one-port calibration for reflection measurements.

• One-port calibration

Uses test set port 1 or port 2 to correct for directivity, frequency response and source match errors.

• Two-port calibration

Compensates for directivity, source match, reflection frequency response, load match, transmission frequen- cy response and crosstalk for an S-parameter test set. Crosstalk calibration can be omitted. Available on

HP 8753ES analyzers.

• TRL*/LRM* calibration

Compensates for directivity, reflection and transmis- sion frequency response, and crosstalk in both the for- ward and reverse directions. Especially suitable for calibrating non-coaxial environments, such as in test fixtures. TRL*/LRM* is a special implementation of TRL/LRM calibration, modified for the three-sampler receiver in the HP 8753ES. Available on HP 8753ES analyzers.

Interpolated error correction

With any type of accuracy enhancement applied, inter- polated mode recalculates the error coefficients when the test frequencies are changed. The number of points can be increased or decreased and the start/stop frequencies can be changed, but the result- ing frequency span must be a subset of the original cal- ibration frequency span. System performance is not specified for measurements with interpolated error correction applied.

Velocity factor

Enters the velocity factor to calculate equivalent elec- trical length.

Reference plane extension

Redefine the plane-of-measurement reference to other than port 1 or port 2 of the HP 8753ET and 8753ES.

Select default calibration kit

Select from a list of standard calibration kits or choose a user-defined kit.

Data averaging

IF bandwidth:

The IF bandwidth is selectable from 6 kHz to 10 Hz

Weighted sweep-to-sweep averaging:

Averages vector data on each successive sweep.

Trace smoothing

Computes the moving average of adjacent data points. Smoothing aperture defines the trace width (number of points) to be averaged, and ranges from 0.25% to 20% of the trace width.

Display control

Display formats

Single-channel, dual-channel overlay (both traces on one graticule), dual-channel split (each trace on sepa- rate graticules), three-channel split (each trace on separate graticules), three-channel overlay (three traces on one graticule), quad-channel overlay (four traces on one graticule), quad-channel split (each trace on separate graticules).

1.	-85 to +5 dBm with Option 004.
2.	+8 dBm maximum with Option 075 or 014.
2.	+8 dBm maximum with Option 075 or 014.	17