Agilent Technologies Infiniium 90000 A Service Manual page 43

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