Tektronix AWG7 1B Series, Service Manual

Page: 49 / 174

Adjustment Procedures
Magic Timing Margin
Check
This calibration ensures that high-speed data acquired by DAC (HFD205) have
enough margin and proper timing setting.
NOTE.
If any abnormal output waveform is displayed, the instrument must be
returned to Tektronix for calibration. See Contacting Tektronix, following the title
page in this manual, for information on contacting Tektronix Service Support.
Equipment required Prerequisites
One oscilloscope
Two SMA-BNC adapters
Two 50
Ω SMA cables
Three 50 Ω SMA terminations
20 minute warm-up at 20 °C to 30 °C
1. Install the test hookup and preset the instrument controls:
NOTE. The AWG7121B and AWG7061B are single-channel instruments and do
not have a channel 2 output.
a. Hook up the oscilloscope:
Connect the SMA cable from the Channel 1 Analog (+) Output on the
front panel of the arbitrary waveform generator to the CH1 Input of
the oscilloscope using the SMA-BNC adapter.
Attach the SMA termination to the Channel 1 Analog (–) Output on
the front panel of the arbitrary waveform generator.
Connect the SMA cable from the Channel 2 Analog (+) Output on the
front panel of the arbitrary waveform generator to the CH2 Input of
the oscilloscope using the SMA-BNC adapter.
Attach the SMA termination to the Channel 2 Analog (–) Output on
the front panel of the arbitrary waveform generator. (See Figure 3-8.)
b. Set the oscilloscope as follows:
CH1 and CH2 Vertical Scale: 200 mV/div
CH1 and CH2 Impedance: 50 Ω
Horizontal Scale: 25.0 ns/div
Trigger: Edge Trigger, CH1 Rising, Set Level to 50% (for Ch 1
Analog (+) output)
Trigger: Edge Trigger, CH2 Rising, Set Level to 50% (for Ch 2
Analog (+) output)
Display: Variable Persistence 500 ms
AWG7000B and AWG7000C Series Service Manual 3–15