11A71

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Tektronix 11A71
Single channel 1 GHz amplifier
Tek 11A71

Compatible with 11000-series scopes

Produced from 1987 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 11A71 a single-channel 1 GHz amplifier for 11000-series scopes.

The 11A71 is derived from the 7A29. However, the 7A29 has a VARIABLE gain control while the 11A71 does not, it has only the 1−2−5 gain sequence.

The 7A29 and 11A71 have virtually the same analog circuitry including a Gilbert multiplier at the front end, but in the 11A71 it is only used for automatic calibration, not for fine gain control. This is feature regression, but it avoids an issue that the 7A29 has, namely that its bandwidth changes substantially with the setting of the front panel VARIABLE VOLTS/DIV control.

After calibration, there is a small imbalance in the 10 mV/div setting, about 0.05 div. This is a design flaw.

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/Div to 1 V/Div in 1−2−5 sequence
Input impedance 50 Ω via a Tekprobe BNC connector on the front on the plug-in
Features
  • Input 5 VRMS overload protected with manual reset

Links

Pictures

Components

Some Parts Used in the 11A71

Part Part Number(s) Class Description Used in
155-0076-00 155-0076-00 Monolithic integrated circuit input protection and probe logic 465 485 7A29 7A29P 11A52 11A71 11A72 SCD1000
155-0175-00 155-0175-00 155-0175-05 Monolithic integrated circuit broadband amplifier 7904A 7912HB 7934 7104 R7103 7A29 7A29P 7F10 067-0587-02 067-0587-10 11A71 SCD1000 EG&G N-AM-173A
155-0180-00 155-0180-00 Hybrid integrated circuit fast input protection 7A29 7A29P 7F10 11A71
155-0181-00 155-0181-00 Hybrid integrated circuit input amplifier 7A29 7A29P 7F10 11A71