Agilent Technologies AGILENT U2761A Manuel de service télécharger pdf (Page 37)

Calibration 3

U2761A Service Guide 23

Amplitude Flatness (–20 dB Range) Verification

This procedure verifies the high frequency AC amplitude

flatness above 100 kHz on the –20 dB attenuator range

relative to 1 kHz.

1 Connect the power meter to measure the output

amplitude of the U2761A as shown in the figure below.

Figure 3-4 U2761A to power meter connection

Table 3 - 6 AC amplitude verification worksheet

U2761A DMM Calculation

Function Frequency Amplitude Measurement Offset

Sine 1.00000 kHz 70 mVrms Vrms

Offset

–

20 dB

= ___ dB

Sine 100.000 kHz 70 mVrms Vrms

Sine 1.00000 kHz 700 mVrms Vrms

Offset

0 dB

= ___ dB

Sine 100.000 kHz 700 mVrms Vrms

Sine 1.00000 kHz 3.500 Vrms Vrms

Offset

+ 20 dB

= ___ dB

Sine 100.000 kHz 3.500 Vrms Vrms

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Agilent Technologies AGILENT U2761A Manuel de service Page 37