LI-COR LI-7500, Instruction Manual

Page: 61 / 155

Section 3
3-32 Setup and Operation
Total System Delay Examples
Total System Delay (ms) = Delay Time + (Delay Step
×
Delay Step Increment)
Software
Release
DAC (3.0.0)
SDM, RS-232
(3.0.0)
Delay Time (ms)
240
186
Delay Step
Increment
9
17
Total Delay (ms)
299
297
Delay Step (ms)
6.5
6.5
Bandwidth
Bandwidth (5, 10 or 20 Hz) determines the signal averaging done by the digital filter. To
avoid aliasing (only a concern for co-spectra, not for fluxes), one should sample the LI-7500
at a frequency greater than or equal to 2 times the bandwidth. Thus, if you are sampling at 10
Hz, set Bandwidth to 5 Hz.
NOTE: Bandwidth applies to all LI-7500 outputs (SDM, DACs, and RS-232).
Bandwidth is the frequency at which the indicated amplitude is 0.707 of the real amplitude
(Figure 3-4).