Agilent Technologies Ininiium 90000 Specifikace stáhnout pdf (Strana 43)

Chapter 3: Testing Performance

Time Scale Accuracy (TSA)

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

with a frequency of 10.00002000 MHz.

Adjust source amplitude such that displayed sine wave is 600 mVpp.

Press the

Default Setup

key on the oscilloscope.

Set channel 1's vertical scale to 100 mV/div.

Set the oscilloscope sample rate to 100 kSa/s. (The resulting measurement will be

aliased.)

Set the scope's horizontal scale to 20 ms/div.

Set the measurement thresholds for all waveforms to a fixed voltage level of 0 V and

±20 mV hysteresis.

Enable a frequency measurement on channel 1.

On the oscilloscope, press

Stop

Press

Clear Display

Press

Run

, wait until 10 acquisitions have accumulated, and then press

Stop

Convert the average frequency value to time scale error by subtracting 20 Hz and

dividing by 10 Hz/ppm.

Record the time scale error value as well as the time since the previous calibration (in

years).

Calculate the specification for Time Scale Accuracy based on the oscilloscope’s age

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

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Agilent Technologies Ininiium 90000 Specifikace Strana 43