Tektronix AWG7000 Series Service Manual page 47

Interleave Calibration
(AWG7102 Option 06 only)
AWG7000 Series Service Manual
m. Change the sampling oscilloscope settings as follows:
Sampling Rate: 10.0 GHz
Ch 2 Phase: +180 degree
n. 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
in the order 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.
o. After you complete all the measurements for Sampling Rate: 10.0 GHz,
click Calc (Delay to Phase). This will display the calculated phase values
in the Ch1-Ch2 Phase (degree) field.
4. Click Save to EEPROM.
5. Click Close. The Inter-Channel Skew Calibration window closes.
This calibration consists of the following two adjustments:
Coarse adjustment – Adjust the phase difference between Ch 1 and Ch 2 to
minimize the rise time of Interleave Output.
Fine adjustment – Adjust the phase difference between Ch 1 and Ch 2 to
minimize the ripples of Interleave Output RZ.
Equipment required One sampling oscilloscope
One 50 Ω SMA 12 dB attenuator
Two 50 Ω SMA cables
Two 50 Ω SMA terminations
1. Install the test hookup and preset the instrument controls:
a. Hook up the sampling oscilloscope:
Attach the SMA terminations to the Interleave (–) Output and the
Marker 1 (–) Output on the front panel of the arbitrary waveform
generator.
Connect an SMA cable from the Interleave (+) Output on the front
panel of the arbitrary waveform generator to the CH 1 Input of the
sampling oscilloscope using the SMA attenuator.
Connect an SMA cable from the Channel 1 Marker (+) Output on the
front panel of the arbitrary waveform generator to the TRIGGER
DIRECT INPUT of the sampling oscilloscope using the SMA
attenuator, as shown in Figure 3-8.
Adjustment Procedures
3-15