Technical data

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.