RedLab 1608FS User's Guide
Functional Details
19
Calibration terminal
The
CAL
connection (pin 17) is an output you should use only to calibrate the RedLab 1608FS. Refer to the
pinout diagram on page 3-16 for the location of this pin. Calibration of the RedLab 1608FS is software-
controlled by
Insta
Cal.
Counter terminal
The
CTR
connection (pin 38) is a TTL-level input to a 32-bit event counter. Refer to the pinout diagram on page
3-16 for the location of this pin. The internal counter increments when the TTL level transitions from low to
high. The counter can count frequencies of up to 1 MHz.
SYNC terminal
The
SYNC
connection (pin 36) is a bidirectional I/O signal. You can use it for two purposes:
Configure as an external clock input to externally source the A/D conversions. The SYNC terminal
supports TTL-level input signals of up to 50 kHz.
Configure as an output to synchronize with a second RedLab 1608FS and acquire data from 16 channels.
Refer to the pinout diagram on page 3-16 for the location of this pin. For more information, refer to page 3-23.
Trigger terminal
The
TRIG_IN
connection (pin 37) is an external digital trigger input. You can configure this terminal with
software for either rising or falling edge.
Accuracy
The overall accuracy of any instrument is limited by the error components within the system. Quite often,
resolution is incorrectly used to quantify the performance of a measurement product. While "16-bits" or "1 part
in 65536" does indicate what can be resolved, it provides little insight into the quality, or accuracy, of an
absolute measurement. Accuracy specifications describe the actual measurement that can be relied upon with a
RedLab 1608FS.
There are three types of errors which affect the accuracy of a measurement system:
offset
gain
nonlinearity
The primary error sources in the RedLab 1608FS are offset and gain. Nonlinearity is small in the RedLab
1608FS, and is not significant as an error source with respect to offset and gain.
Summary of Contents for RedLab 1608FS
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