Crystal Instruments Spider - Page 119

Spider DSA User’s Manual
119
type)
Constant
Multiply
Signal
(The same as signals, APS
type)
Apply the constant to the
original data (EURMS^2)
Constant
Divided
by
Signal
(The same as signals, APS
type)
Apply the constant to the
original data (EURMS^2)
In the On-board FRF tab (only available when FRF box was checked at the time
of creating the test), the Spider calculates the FRF signals and transmits it to
the PC for display. Any one channel in the Spider system can be specified as the
reference channel by clicking the Change Reference Channel button and
selecting the proper channel.
Figure 76. On-board FRF Signals
In the PC FRF tab, FRF signals are calculated by the PC instead of the Spider.
Since the PC FRF relies on the PC’s resource which is much more powerful than
the Spider’s processor, hundreds of FRF signals can be computed
simultaneously without consuming the Spider’s resource. Multiple channels can
be specified as reference channels.