Author: Cyril H. Nute, Naval Medical Neuropsychiatric Research Unit, San Diego, California

XSPECT is a pair of programs written for the PDP-12 computer. Program XS, written in DIAL, accepts 2048 digital data measurements for each of two EEG channels, written on one reel of LINCtape mounted on Unit 0. This input record may be created from analog voltages input to the AD12 analog-to-digital converter, using the two D.E.C. programs, ADTAPE and ADCON. The output of programs XS is a three-black record written on the "intermediate output tape", mounted on Unit 1.

The second program of the set is $XS, written in FOCAL-12, under the DIAL-MS monitor system. It accepts a three-block intermediate record from the LINCtape mounted on Unit 1, and uses the ASR33 teletype to create a listing of two auto-power density spectra, plus the coherence and phase relationships between the two EEG data channels. Frequencies are written on the left edge of the paper, with each line of output representing a .5-Hz frequency interval.

Minimum Hardware: 8K PDP-12, AD12 analog-to-digital converter, KW12 Clock, 2 LINCtape units, ASR33

Other Programs Needed: DIAL-MS Monitor System, with FOCAL-12; QANDA; FFT (DECUS NO. 8-143)

Restrictions: Need two channels of input data on LINCtape, sampled at 128 Hz for 16 sec; output resolution in .5 Hz. May be changed by contacting the author

Source Language: DIAL

Catalog: July 1974