11A71

Template:Plugin Sidebar 2 The Tektronix 11A71 a single-channel 1 GHz amplifier for 11000-series scopes.

The 11A71 is derived from the 7A29.

Key Specifications

Bandwidth	DC to 1 GHz
Number of Inputs	1
Rise time	350 ps in 1 GHz mainframe such as the 11402, 11402A. 11403, 11403A, DSA601A, or DSA602A
Deflection	1 mV to 1V per division in 1-2-5 sequence
Input impedance	50 Ω via a Tekprobe BNC connector on the front on the plug-in
Features	Input 5V RMS overload protected with manual reset

11A71 external view
Block diagram
Right side of the 11A71 plug-in (analog board)
Input section. Cable loop acts as a delay line, connects to the input attenuator.
Input attenuator, 50 Ω signal path. Laser-trimmed thick film resistors. AC coupling capacitor in plastic support.
Amplifier section. Blue cable from input attenuator connects to the 155-0180-00 input protection circuit. Signal is differential from after the first amplifier up to the AD converter in the mainframe.
Compensation trimmers
Close-up of late-80s RF design
Digital board, 8031 MCU
Digital daughter board
left side
right side
Attenuator
Kernel
Amplifier
Interface