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Tektronix AM511
CATV pre-amplifier
Tektronix AM511

Produced from 1976 to 1980

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix AM511 is a CATV pre-amplifier plug-in for the TM500 system.

It is designed to operate as an accessory for the 7L12 and 7L13 Spectrum Analyzers, intended for measuring-signal-to noise, radiation, and field intensity on CATV, television, and FM installations. Other uses include radio-system servicing and measurements, as well as increasing sensitivity for EMI measurements. There is a very similar 7k plugin, the 7K11.

Key Specifications

Frequency Range 30 to 890 MHz
Input Impedance 75 Ω
VSWR <2:1
Reference Level +79 dBmV to 0 dBmV in 1 dB steps
Output to Spectrum Analyzer set to −30 dBm, 50 Ω
Intermodulation >70 dB down
Calibrator +30 dBmV, 50 MHz, 75 Ω


Documents Referencing AM511

Document Class Title Authors Year Links
070-2088-01.pdf Book TM500 Series Rear Interface Data Book 1976
Tekscope 1976 V8 N2.pdf Article New Products 1976


1980: $575 (~$2,100 in 2023 Dollars)



Some Parts Used in the AM511