Keysight 9000 Series Service Manual page 43

Chapter 3: Testing Performance
Connections
Connect the equipment as shown in the following figure.
Procedure, 9000A Series
1 Configure the sine wave source to output a 0 dBm (600 mVpp) sine wave into 50 ohms with a frequency
of 10.00002000 MHz.
2 Adjust source amplitude such that displayed sine wave is 600 mVpp.
3 Press [Default Setup] on the oscilloscope.
4 Set channel 1's vertical scale to 100 mV/div.
5 Set the oscilloscope sample rate to 100 kSa/s. (The resulting measurement will be aliased.)
6 Set the scope's horizontal scale to 20 ms/div.
7 Set the measurement thresholds for all waveforms to a fixed voltage level of 0 V and ±20 mV hysteresis.
8 Enable a frequency measurement on channel 1.
9 On the oscilloscope, press Stop.
10 Press Clear Display.
11 Press Run, wait until 10 acquisitions have accumulated, and then press Stop.
12 Convert the average frequency value to time scale error by subtracting 20 Hz and dividing by 10 Hz/ppm.
13 Record the time scale error value as well as the time since the previous calibration (in years).
14 Calculate the specification for Time Scale Accuracy based on the oscilloscope's age using the following
formula:
TSA = ±(0.4 + 0.5(Years Since Factory Calibration)) ppm peak
15 Compare the measured time scale error to the TSA specification. Note that the measurement result
should exceed the specified accuracy by at least 0.1 ppm to guarantee compliance to the specification.
16 Record the results in the Performance Test Record.
E8257D Sine Wave Source
Time Scale Accuracy
(TSA)
9000 Oscilloscope
channel input
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