Tektronix AWG2021 User Manual page 514

Log Frequency Sweep
(LOG_SWP.WFM)
AWG2021 User Manual
Made with the equation editor.
Figure D 8: Log Frequency Sweep Formula and Waveform
Constants k0 is the sweep period and k1 and k2 are the starting and ending
frequencies.
Description This waveform can be expressed generally by the following formula.
V(t) + sin 2pf
Here f is the starting frequency, f
1
phase, and T is the sweep period.
To assure that the phases match when this waveform is iterated, the sweep
period is set to be close to an integer multiple of the reciprocal of the
average frequency
f f
2 1
f
Settings Waveform points: 22000
Clock frequency: 20 MHz
Output time: 0.22 ms
Appendix D: Sample Waveform Library
t
f
exp t
2
@ In dt ) f
1
T f
1
0
is the ending frequency, ø
2
f
2
In
f
1
0
is the initial
0
D 11