B170-V: Difference between revisions
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The '''B170-V''' is a 170 Ω attenuator for the [[517]]. | The '''Tektronix B170-V''' is a 170 Ω attenuator for the [[517]]. Switches select from 0 to 64 dB of attenuation. | ||
[[John Addis]] wrote: | [[John Addis]] wrote: | ||
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<gallery> | <gallery> | ||
Tek b170-v top.jpg | Tek b170-v top.jpg | ||
B170-V_1.jpg | B170-V_1.jpg | ||
B170-A_2.jpg | B170-A_2.jpg | ||
B170-A_3.jpg | B170-A_3.jpg | ||
Latest revision as of 21:50, 28 November 2023
The Tektronix B170-V is a 170 Ω attenuator for the 517. Switches select from 0 to 64 dB of attenuation.
John Addis wrote:
The inductors compensate for the switch stray capacitances. When the Ls and the stray Cs are connected like that, they constitute a lumped element delay line. The intent is not to make a delay line, but compensate out all the stray Cs by making a lumped delay line out of it. That extends the bandwidth and makes the impedance 170 ohms (up to 1 GHz or so) rather than a bunch of Cs sitting on the connection from input to output.
Pictures
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Hand-trimmed resistors
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Schematic
