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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 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
V(t) + sin
ȧ
ȡ
Ȣ
2pf
1
t ) 2pf
2
ŕ
t
0
t
T
dt ) f
0
ȧ
ȣ
Ȥ
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 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
f
2
–f
1
In
f
2
f
1
of the average frequency .
V(t) + sin
ȧ
ȡ
Ȣ
2pf
1
ŕ
t
0
exp
ǒ
t
T
@ In
f
2
f
1
Ǔ
dt ) f
0
ȧ
ȣ
Ȥ
Settings Waveform points: 8800, Clock frequency: 800 MHz, Output time: 11 ms