Keysight U8903B, Руководство по обслуживанию

Страница: 52 / 165

3 Performance Verification for Analog Analyzer
52 Keysight U8903B Service Guide
– Input bandwidth: 90 kHz
– Input coupling: DC
– Input range:1 V
– Voltage detector type: RMS
– Trigger source: Immediate
– Measurement function2: SMPTE IMD
– Sample size: 131072
– Input Auto Range: ON
– IMD Frequency Detection Mode: Generator frequency lock
4 On the U8903B generator, set the waveform to the first SMPTE function as given in the
“
Test record for SMPTE IMD verification ” on page 115 .
5 On the U8903B generator, set the upper frequency to 7 kHz. Set the lower frequency
and the amplitude of Vrms as given in the “
Test record for SMPTE IMD verification ” on
page 115 .
6 On the U8903B analyzer, set the input channels lower frequency to be tested as given
in the “
Test record for SMPTE IMD verification ” on page 115 .
7 Enable the U8903B analyzer input channels to be tested.
8 Record the SMPTE IMD measurement on the U8903B input channels to be tested in the
“
Test record for SMPTE IMD verification ” on page 115 .
9 This measurement will be the SMPTE IMD of the U8903B analyzer in dB.
10 Repeat step 5 to step 8 for the rest of the amplitudes and lower frequencies.
11 Repeat step 4 to step 10 for the rest of the SMPTE functions to complete the
verification of the U8903B input channel to be tested
12 Compare the recorded SMPTE IMD measurement values to the specification. If the test
fails, adjustment will need to be carried out accordingly.