Tektronix AWG7000 Series, Service Manual

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Adjustment Procedures
3-14
AWG7000 Series Service Manual
3. Perform the following measurements:
a. Adjust the horizontal position of sampling oscilloscope so that the rising
edge of the arbitrary waveform generator (AWG7000 series) Ch 1 Analog
(+) Output waveform is visible near the center of the oscilloscope screen,
and then select File Menu > Save Waveform... to save the waveform data
to R1.
b. Disconnect the SMA cable from the Ch 1 Analog (+) Output, and then
connect it to the Ch 2 Analog (+) Output. Do not use a different cable for
the Ch 1 and Ch 2 connectors. Always use the same SMA cable.
c. Push CLEAR DATA and then RUN/STOP on the sampling oscilloscope
front panel control.
d. Measure R1 to C1 Delay using the Measurement function of the sampling
oscilloscope with the following settings:
„
Sampling Rate: 5.0 GHz
„
Ch 2 Phase: 0 degree
e. If the delay value measured in step d is outside
±
100 ps range, change the
Sampling Rate setting to 10.0 GHz and then return the setting to 5.0 GHz.
Measure
R1 to C1 Delay again. Repeat this measurement until the R1 to
C1 Delay value is within the
±
100 ps range.
f. Change the sampling oscilloscope settings as follows:
„
Sampling Rate: 5.0 GHz
„
Ch 2 Phase: +180 degree
g. Enter the measurement values of R1 to C1 Delay for each setting to the
first place after the decimal point while changing the Ch 2 Phase settings
from +180 degrees to –180 degrees using either the mouse or the Tab key.
Adjust the horizontal position of the sampling oscilloscope as necessary so
that the rising edge of the waveform is displayed at the center of the screen.
h. After you complete all the measurements for Sampling Rate: 5.0 GHz ,
click Calc (Delay to Phase) . This will display the calculated phase values
in the Ch1-Ch2 Phase (degree) field.
i. Click Sampling Rate:10.0 GHz .
j. Disconnect the SMA cable from the Ch 2 Analog (+) Output, and then
connect it to the Ch 1 Analog (+) Output.
k. Adjust the horizontal position of the sampling oscilloscope so that the
rising edge of the arbitrary waveform generator Ch 1 Analog (+) Output
waveform is visible near the center of the oscilloscope screen, and then
select File Menu > Save Waveform... to save the waveform data to R1.
l. Disconnect the SMA cable from the Ch 1 Analog (+) Output, and then
connect it to the Ch 2 Analog (+) Output.