Tektronix 80A00, Техническое описание

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Optical Sampling Modules
8. Connect a less than 2 ns delay, 50 Ω coaxial cable between the CLOCK
OUTPUT of the 80C0X-CR Optical Sampling Module and the Channel
3 input on the 80E02 Sampling Module.
9. Connect a less than 2 ns delay, 50 Ω coaxial cable between the DATA
OUTPUT of the 80C0X-CR Optical Sampling Module and the Channel
4 input on the 80E02 Sampling Module.
10. The D3186 Pulse Pattern Generator must use its own reference clock. Set the
following data signal parameters on the pattern generator:
AC coupled
DATA output mode
–2 V
Amplitude 0.700 V
Offset –1.00 V
PRBS23 pattern
NRZ data format
Balanced duty cycle (crossing set to the default 50% level)
Data rate to 2.48832 Gb/s (the data rate will be changed, depending on each speci
fi c
data rate to be tested later in the procedure)
11. Set the variable optical attenuator for minimum attenuation.
12. Allow the instrument and its modules to warm up for at least 20 minutes in an
environment that has had less than 1 °C variation throughout the warm-up
cycle.
13. Push the DEFAULT SETUP button on the instrument and click Yes .
14. Push the SELECT ON/OFF button on the 80C0X Optical Sampling Module
so that the adjacent indicator lights. This turns on Channel 1 (C1) on the
80C0X-CR Optical Sampling Module.
15. Push the SELECT ON/OFF button on the 80E02 Sampling Module so that
the adjacent indicator lights. This turns on Channel 3 (C3), which displays the
CLOCK signal.
16. Select Setup > Mode/Trigger in the main menu. Make the following changes:
a. Set the Trigger Source to Direct .
b. Click the Advanced Trigger Setup button.
c. Click the Set to 50% button.
d. Select positive edge for the Slope.
e. Close the Advanced Trigger Setup dialog box.
DSA8300 Performance Veri fi cation 243