Tektronix AWG610 - Manual (Page 432)

Appendix D: Sample Waveforms
D-6
AWG610 Arbitrary Waveform Generator User Manual
Table D-8: Linear frequency sweep
File name LIN_SWP.WFM Made with equation editor
Equation clock = 1e9
size = 8000
k0 = 8e-6
'sweep period
k1 = 1e6 'start frequency
k2 = 10e6 'end frequency
lin_swp.wfm" = sin(2 * pi * k1 * time + 2 * pi * (k2 - k1) * (time ^ 2)/2/k0)
Descriptions This waveform can be expressed generally by the following formula.
Here f
1
is the starting frequency, f
2
is the ending frequency, F
0
is the
initial phase, and Tis 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
V(t) + sin
ȧȡȢ
2
p
f
1
t ) 2 p
f
2
ŕ
t
0
t
T
dt ) f
0
ȧȣȤ
of the average frequency . f
1
) f
2
2
Settings Waveform points: 8000, Clock frequency: 1.0 GHz, Output time: 8000 ns
Table D-9: Log frequency sweep
File name LOG_SWP.WFM Made with equation editor
Equation clock = 800e6
size = 8800
k0 = 11e-6
'sweep period
k1 = 1e6 'start frequency
k2 = 10e6 'end frequency
k3 = log (k2 / k1)
log_swp.wfm" = sin(2 * pi * k1 * k0 / k3 * (exp (k3 * scale) -1))
Descriptions This waveform can be expressed generally by the following formula.
Here f
1
is the starting frequency, f
2
is the ending frequency, F
0
is the
initial phase, and Tis 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
f
2
–f
1
In
f
2
f
1
of the average frequency .
V(t) + sin
ȧȡȢ
2 pf
1
ŕ
t
0
exp
ǒ
t
T @
In
f
2
f
1
Ǔ
dt ) f
0
ȧȣȤ
Settings Waveform points: 8800, Clock frequency: 800 MHz, Output time: 11 ms