Pulse Edge Time Adjustment - Agilent Technologies 33250A Service Manual

4
Chapter 4 Calibration Procedures

Pulse Edge Time Adjustment

Pulse Edge Time Adjustment
The function generator stores calibration constants used to calculate the
slope and offset of the edge time DAC outputs. These setups output
100 Hz pulses with 5 ms pulse widths. The setups, following the first
three, must be done in pairs (i.e., 107 immediately before 108).
1 Set the oscilloscope to 50Ω input termination (if your oscilloscope does
not have a 50Ω input termination, you must provide an external
termination). Measure the rise time from the 10% to 90% points on the
waveform. Make the connections shown on page 87.
2 Use an oscilloscope to measure the rise time of the output signal at the
front-panel Output connector for each setup in the following table.
Nominal Signal
Setup Freq Amplitude
104 100 Hz
105* 100 Hz
106* 100 Hz
107 100 Hz
108* 100 Hz
109 100 Hz
110* 100 Hz
111 100 Hz
112* 100 Hz
113 100 Hz
114* 100 Hz
* Constants are stored after completing this setup.
1
Rise time measured can vary greatly from the nominal values shown.
3 Using the numeric keypad or knob, adjust the displayed rise time
(10% to 90%) at each setup to match the measured rise time.
Select ENTER VALUE.
4 There are no specific operational verification tests for the Pulse Edge Time
Adjustment. Continue with the next adjustment procedure in this chapter.
88
1
Rise Time
1 Vpp 3.2 ns
1 Vpp 4.5 ns
1 Vpp 64 ns
1 Vpp 8 ns
1 Vpp 241 ns
1 Vpp 161 ns
4.9 µs
1 Vpp
2.6 µs
1 Vpp
82 µs
1 Vpp
57 µs
1 Vpp
1 Vpp 1.75 ms
Fastest transition range 0
Mid transition range 0
Slowest transition range 0
Fastest transition range 1
Slowest transition range 1
Fastest transition range 2
Slowest transition range 2
Fastest transition range 3
Slowest transition range 3
Fastest transition range 4
Slowest transition range 4