Agilent Technologies 86100D Bedienungsanleitung PDF herunterladen (Seite 22)

Modules specifications

TDR system

86100D Option 202 characteristics

Return loss Attenuation

Return loss uncertainty – phase

*See end notes for additional phase uncertainties

GHz

Degrees

–10

–20

–30

6 dB

12 dB

20 dB

26 dB

3 6 9 12 16

Attenuation uncertainty – phase

*See end notes for additional phase uncertainties

GHz

Degrees

–10

–20

–30

6 dB

12 dB

20 dB

30 dB

40 dB

3 6 9 12 16

Test conditions

• Mainframe and module have been turned on for at least one

hour and have been calibrated

• TDR calibration has been performed using N1024B

• Internal measurements use 54754A as stimulus and either

54754A or 86112A as receiver

• External measurements use 54754A and Picosecond Pulse

Labs Accelerator as stimulus and 86118A as receiver

• All characteristics apply to single-ended and differential

• Derived from measurements of wide range of devices

compared to vector network analyzer measurements

• Averages of 256 except as noted in dynamic range

Phase uncertainty

• Longer equipment warm-up times and careful calibration

provide the best phase performance – perform module and

TDR calibrations again if temperatures change

• Phase uncertainty is the sum of the uncertainty from the

desired graph plus the two additional components which are

estimated below

• Sampling points - S-parameters are determined from the

sampling points record length

over the time interval, which

is time per division multiplied by ten divisions. The reference

plane is determined to nearest sampling point with uncertainty

given by this equation:

Uncertainty in degrees

time per division (sec)

10 divisions

f (Hz)

360

(sampling points) 4096

Simplified version = time per division (sec)

f(Hz) / 2.28

• Time base drift with temperature - the amount of drift can be

observed by placing the calibration short at the reference plane

and reading the amount of time difference in picoseconds. The

phase uncertainty is given by this equation:

Uncertainty in degrees (temp drift) = time diff (sec) •frequency (Hz)

360

Performance characteristics for 86100D Option 202

1. Record length is user-defined from 16 to 16384 However, the minimum

record length used for S-parameters is 4096, independent of user settings.

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