black scope

black scope

[¦blak ′skōp]
(electronics)
Cathode-ray tube operating at the threshold of luminescence when no video signals are being applied.
References in periodicals archive ?
The crossbows measure between 29 and 35 inches long and were available individually or as part of a package that included a black scope, quiver, three bolts and a rope cocking aid.
The crossbow measures about 36 inches long and was sold individually or as part of a package with a black scope, four-arrow quiver and bracket, four arrows, four 150-grain field points and a rope-cocking aid.
The air rifles have a black scope and a front sight and a rear sight.