The natural unit of measurement of the original analog signal (e.g., millivolts, liters per second, degrees). To convert samples into physical units, subtract the ADC zero and divide the remainder by [..]

A signal, such as an ECG, for which only variations in level, rather than absolute levels, are significant. Such signals are usually passed through high-pass filters before they are digitized, in orde [..]

The number of significant bits per sample. Typical ADCs yield between 8 and 16 bits of resolution.

The unit of amplitude for samples.

The format used for interchange of AHA DB and MIT DB records on 9-track tape between institutions, not used for on-line files because it is relatively wasteful of storage space compared to MIT format [..]

An integer in the range of 1 to ACMAX (a constant defined in `<ecg/ecgcodes.h>') inclusive, which denotes an event type.

A name associated with an annotation file. On writable UNIX and Macintosh file systems, the annotation file name is constructed from the annotator name by appending a `.' and the record name. On [..]

In this guide, a program that uses the DB library to do something.

The counter value (q.v.) that corresponds to sample 0. The base counter value is read by getbasecount, and set by setbasecount (or by any of the functions that read `header' files). If not define [..]

The sample value that corresponds to the baseline (isoelectric level or physical zero level) in the signal. This quantity may drift during the record for a variety of reasons, in which case the baseli [..]