Signal Handling
Column compensation
160
As the sampling rate slows, other factors such as thermal noise increase noise
levels.
Figure 25 Relationship of noise to data rates
INET
This applies only to 3395A/B or 3396B/C integrators with an INET board
installed.
INET transmits data digitally at a rate of 20 Hz and can handle peaks of at least
0.01 minute width. INET can select which of the two GC signals to use—you
define what those signals are with the control table.
Column compensation
Peaks are integrated more accurately and repeatably on a flat baseline than on
a rising baseline. Column compensation corrects for baseline rise during
temperature programming. This is done by making a blank run—one with no
Excess noise (due to flow,
oven temperature, detector
block temperatures,etc.)
Slower data ratesFaster data rates
Relative noise magnitude
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