HP 5280A (HP5285A PLUG-IN ) Reversible Counter Dual Channel DC - 2 MHz

one reversible counter, HP 5280A with 5285A Universal Input Plug-In, Dual- Channel A..B..

description:

Range: .......................................................DC to > 2 MHz... for both channels A....B
Gate Control............................................. Manual or External Dual
Input impedance..................................... 1 megOhm ....75 pF
max. input voltage.................................. + / - 600 Volts
many operation modes:

A Quad B.......Af(B).......Algebrate A / B.......A......B.....A - B
BCD outputs
power supply........................................... 115 / 230 VAC mains

instrument is in used, normal condition and 100 % functional
an classic old instrument, but still very useful as reversible counter with external triggering