The Tektronix Type 1A5 is a differential amplifier plug-in for 500-series scopes.
|Bandwidth||50 MHz down to 5 mV/div, 40 MHz at 1 mV/div|
|Deflection||1 mV/div to 20 V/div, 1−2−5|
|Common-mode rejection||20,000:1 at low frequencies, deteriorating to 200:1 at 20 MHz|
Like most Tektronix differential plug-ins, the 1A5 has three modes: VA−VC, VA−VB, and VC−VB.
VC is controlled by a ten-turn potentiometer and can vary from −5 V to +5 V (0.5 V on the 5 V/div to 20 V/div ranges).