Technical data

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