7A29: Difference between revisions
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It uses a "feed-beside" scheme to compensate for low-frequency anomalies in the frequency response that are attributed to transistor heating. | It uses a "feed-beside" scheme to compensate for low-frequency anomalies in the frequency response that are attributed to transistor heating. | ||
The input connector is a special Tek-made part that is exactly 50 Ω. Typical BNC connectors are around 52 Ω. | The input connector is a special Tek-made part that is exactly 50 Ω. Typical BNC connectors are around 52 Ω. | ||
==Links== | |||
* [http://www.eevblog.com/forum/testgear/tektronix-7a29-teardown/ Tektronix 7A29 teardown] | |||
==Pictures== | ==Pictures== | ||
Revision as of 05:28, 23 August 2015
Template:Plugin Sidebar 2 The Tektronix 7A29 is a 1 GHz single-channel vertical plug-in for 7000-series scopes. It is primarily intended for the 7103 and 7104. Like with the 7A19, a variable signal delay was available as an option.
There is also a 7A29P, which has digitally programmable gain, intended for the 7000 series digitizers.
Specifications
- Bandwidth: 1 GHz (in 7104)
- Input impedance: 50 Ω
- 10 mV/div to 1V/div
- Single channel
- Option 4: variable delay
Internals
The 7A29 employs a number of Tek-made custom Hypcon-packaged hybrids, the 155-0180-00 fast input protection, 155-0181-00 input amplifier and 155-0175-00 trigger amplifier (2 ×).
It uses a "feed-beside" scheme to compensate for low-frequency anomalies in the frequency response that are attributed to transistor heating. The input connector is a special Tek-made part that is exactly 50 Ω. Typical BNC connectors are around 52 Ω.
Links
Pictures
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photo of 7A29 from manual (normal and option 4 units)
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input amplifier schematic
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output amplifier schematic
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7A29, left view (Opt. 4 variable delay line enclosure above PCB)
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7A29 amplifiers
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7A29, right side, rear
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7A29, right side, front
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7A29P
