HALCYON

DATA COMMUNICATIONS TEST EQUIPMENT-NAMELY, EQUALIZERS, AMPLITUDE RESPONSE AND DELAY MEASURING UNITS, AMPLITUDE RESPONSE AND DELAY TRANSMISSION SETS, MULTI-PURPOSE DATA LINE TEST INSTRUMENTS, TRANSMISSION LINE TEST UNITS, TRANSMISSION MEASURING SETS, VOICE AND PROGRAM CHANNEL CABLE CIRCUIT ANALYZERS, MAIN FRAMES FOR ENCASING THE FOREGOING, TEST CONSOLES, CARRYING CASES, SOLD AS A UNIT WITH THE GOODS, RACK ADAPTERS AND, GRATICULE OVERLAYS