Technical data

Service 1
Agilent 1000A Series Oscilloscopes Service Guide 29
To test time scale accuracy
In this test you measure the absolute error of the timebase oscillator and
compare the results to the specification.
Time scale accuracy refers to the absolute accuracy of the oscilloscope's
time scale. Because time scale accuracy depends directly on the
specifications of a crystal oscillator, it is comprised of these components:
• An initial accuracy component — applies to the oscilloscope's accuracy
on the date of its shipment to the customer.
• A temperature component — refers to the ambient temperaure in which
the oscilloscope operates.
• An aging component — scales linearly from the oscilloscope's
manufacture date and adds to the initial accuracy and temperature
components.
You can get the “years since manufacture” from the serial number,
which is in this format:
Table 8 Time Scale Accuracy Specification
Time Scale Accuracy ±50 ppm from 0 °C to 30 °C
±50 ppm + 2 ppm per °C from 30 °C to 45 °C
+ 5 ppm * (years since manufacture)
Country Code
Year Code (year - 1960)
Week in Year
ID#
CN XX XX XXXX