Agilent Technologies AGILENT U2761A Servisní příručka stáhnout pdf (Strana 38)

3 Calibration

24 U2761A Service Guide

2 Set the U2761A based on the following.

• Load impedance: 50 Ω

• Function: Sine wave

• Frequency: 100 kHz

• Amplitude: 35 mVrms (–16.108 dBm)

3 Set the power meter Filter Mode to Manual and set Average

Length to 500 to improve measurement stability. Allow a

minimum of 30 s between the time of setting the U2761A

and collecting the measurement reading.

4 On the power meter, use the Relative Power function to set

the current reading as the reference value. This allows

you to compare future measurement result in dB.

5 Set the power meter Offset to the Offset

–20dB

value

previously calculated in Table 3- 6. The power meter will

directly read the flatness error specification to

1 kHz.

6 Set the U2761A to each output listed in Table 3- 7.

Measure the output amplitude using the power meter (the

relative measurement in dB).

7 Compare the measured output with the test limits shown

in Table 3- 7.

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 66 67

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Agilent Technologies AGILENT U2761A Servisní příručka Strana 38