Keysight Technologies InfiniiVision 2000, Service Manual

Page: 44 / 86

44 2000/3000 X-Series Oscilloscopes Service Guide
2
Testing Performance
Then after converting the values from the power meter to Vrms:
16 The result from step 14 should be b3.0 dB and -3.0 dB. Record the
result in the Performance Test Record (see page 53 ).
17 Move the power splitter from the channel 1 to the channel 2 input.
18 Turn off the current channel and turn on the next channel using the channel
keys.
19 Repeat steps 3 through 17 for the remaining channels, setting the parameters
of the channel being tested where appropriate.
response(dB) = 20 log
10




mV 211.2 mV/ 210.4
mV 185.3 / mV 161.6
= -1.16 dB