OP-1 5 Inch Scope.

DC-coupled amps.

DC-coupled CRT unblanking.

Triggered sweepcircuit works on internal or external signals and can be either DC or AC coupled.

Selectable triggering signal polarity.

Select any point on the wave form as the start of sweep, using the TRIGGER LEVEL control.

AUTOMATIC position also provided, in which sweep recurs @ 50 Hz rate, but can be driven over a wide
range of frequencies without additional adjustment.

Switch-selected sweep frequency base-rates are2 & 0.2 milliseconds/CM and 20, 2 and 1
microseconds/CM, in conjunction with a continuously variable 10:1 multiplier.

Sweep frequencies calibrated to within 10$ at any control setting.

Sweep frequency can be reducedby adding capacitance to the EXT CAP binding post on the front
panel.

5ADP2 flat face CRT has edge-lighted grid screen.

Conetic-fernetic CRT shield.

12-position vertical attenuator calibrated in volts-per-CM.

Horizontal sweep is calibrated in time-per-CM.

34 lbs.  
Price in 1958:  $179.95.  (This is still a pretty darned good scope.)