User`s guide

Chirp
5-63
The following diagram illustrates the possible shapes of the frequency sweep
that you can obtain by setting the
Frequency sweep and Sweep mode
parameters.
For information on how to set the frequency values in your sweep, see “Setting
Instantaneous Frequency Sweep Values”.
Unidirectional and Bidirectional Sweep Modes
The Sweep mode parameter determines whether your sweep is unidirectional
or bidirectional, which affects the shape of your output frequency sweep (see
“Shaping the Frequency Sweep by Setting Frequency Sweep and Sweep Mode”
...
time
f
i
(t)
Negative Sweeps
Quadratic and Logarithmic Sweeps
Unidirectional
(f
i
(t
g
)<f
0
)
...
time
f
i
(t)
...
time
f
i
(t)
...
time
f
i
(t)
...
time
f
i
(t)
...
time
f
i
(t)
...
time
f
i
(t)
...
time
f
i
(t)
(Logarithmic sweeps cannot be negative.)
These diagrams apply
only to quadratic sweeps.
Possible Shapes of the Output Instantaneous Frequency Sweep
Positive Sweeps
(f
i
(t
g
)>f
0
)
Sweeps
Bidirectional
Sweeps
Negative Sweeps
Positive Sweeps
Swept Cosine and Linear Sweeps
T
sw
T
sw
T
sw
T
sw
T
sw
T
sw
T
sw
T
sw