7A24: Difference between revisions
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* [[Media:070-2391-00.pdf|Tektronix 7A24 Manual]] (later version SN B103000+, OCR) | * [[Media:070-2391-00.pdf|Tektronix 7A24 Manual]] (later version SN B103000+, OCR) | ||
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The '''Tektronix 7A24''' is a | The '''Tektronix 7A24''' is a 400 MHz dual-channel vertical plug-in for [[7000-series scopes]] with (fused) 50 Ω [[BNC]] inputs. It is the fastest multi-channel plug-in available for the 7000 series. Unlike most other plug-ins, it does not offer AC input coupling. | ||
It is the fastest multi-channel plug-in available for the 7000 series. Unlike most other plug-ins, it does not offer AC input coupling. | |||
A single-channel version was planned as the 7A25 but did not make it into production. | A single-channel version was planned as the [[7A25]] but did not make it into production. | ||
The 7A24 would typically have been used in [[7834]], [[7844]] or [[7854]] mainframes. | The 7A24 would typically have been used in [[7834]], [[7844]] or [[7854]] mainframes. | ||
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{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth | 400 MHz (71xx) / 350 MHz (79xx) / 300 MHz (78xx) }} | {{Spec | Bandwidth | 400 MHz (71xx) / 350 MHz (79xx) / 300 MHz (78xx) }} | ||
{{Spec | Deflection | 5 mV/Div to 1 V/Div (1–2–5), variable ×2.5 (up to 2.5 V/Div) }} | {{Spec | Deflection | 5 mV/Div to 1 V/Div (1–2–5), variable ×2.5 (up to 2.5 V/Div) }} | ||
{{Spec | Input impedance | 50 Ω }} | {{Spec | Input impedance | 50 Ω }} | ||
{{Spec | Maximum input | 5 V (0.5 W) − no damage below 10 V (2 W) }} | {{Spec | Maximum input | 5 V (0.5 W) − no damage below 10 V (2 W) }} | ||
{{Spec | Timing | Delay difference between channels < 200 ps }} | {{Spec | Timing | Delay difference between channels <200 ps }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
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attenuator modules held to the switching PCB using steel springs. | attenuator modules held to the switching PCB using steel springs. | ||
The amplifier is built using the Tek-made differential amplifier [[155-0078-00|155-0078-xx]] (four units | The amplifier is built using the Tek-made differential amplifier [[155-0078-00|155-0078-xx]] (four units per channel in early, five in late versions; various grades). | ||
per channel in early, five in late versions; various grades). In the 5 mV/Div range only, the amplifier gain | In the 5 mV/Div range only, the amplifier gain is doubled electronically. | ||
is doubled electronically. The signal trace layout on the PCB is designed to provide [[T-coil peaking]]. | The signal trace layout on the PCB is designed to provide [[T-coil peaking]]. | ||
The 7A24 does not use the ±50 V supplies provided by the mainframe. | The 7A24 does not use the ±50 V supplies provided by the mainframe. | ||
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==Links== | ==Links== | ||
* [ | * [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_amplifier/amplifier_7A24.htm Tek 7A24 page @ amplifier.cd] | ||
* [http://www.barrytech.com/tektronix/tek7000/tek7a24.html Tek 7A24 page @ barrytech.com] | * [http://www.barrytech.com/tektronix/tek7000/tek7a24.html Tek 7A24 page @ barrytech.com] | ||
Revision as of 10:30, 12 May 2023
The Tektronix 7A24 is a 400 MHz dual-channel vertical plug-in for 7000-series scopes with (fused) 50 Ω BNC inputs. It is the fastest multi-channel plug-in available for the 7000 series. Unlike most other plug-ins, it does not offer AC input coupling.
A single-channel version was planned as the 7A25 but did not make it into production.
The 7A24 would typically have been used in 7834, 7844 or 7854 mainframes. The recommended probes were the P6056 and P6057.
The 75 MHz 7A18 and 200 MHz 7A26 share the same front panel layout and operation (but have 1 MΩ inputs).
Key Specifications
| Bandwidth | 400 MHz (71xx) / 350 MHz (79xx) / 300 MHz (78xx) |
|---|---|
| Deflection | 5 mV/Div to 1 V/Div (1–2–5), variable ×2.5 (up to 2.5 V/Div) |
| Input impedance | 50 Ω |
| Maximum input | 5 V (0.5 W) − no damage below 10 V (2 W) |
| Timing | Delay difference between channels <200 ps |
Internals
The 7A24's input attenuators are similar to that in the 7A19, using replaceable ceramic attenuator modules held to the switching PCB using steel springs.
The amplifier is built using the Tek-made differential amplifier 155-0078-xx (four units per channel in early, five in late versions; various grades). In the 5 mV/Div range only, the amplifier gain is doubled electronically. The signal trace layout on the PCB is designed to provide T-coil peaking.
The 7A24 does not use the ±50 V supplies provided by the mainframe.
Links
Pictures
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Front
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Left side (later version)
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Right side (later version)
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Attenuator switches
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Amplifier board
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Right front
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Right rear
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Cartoon in schematic: Signal Out
Custom ICs used in the 7A24
| Page | Model | Part nos | Description | Designers | Used in |
|---|---|---|---|---|---|
| 155-0078-00 | M084 | 155-0078-xx • 155-0273-00 • 155-0274-00 | broadband amplifier | John Addis | 464 • 465 • 466 • 468 • 475 • 475A • 475M • 485 • 7834 • 7844 • 7854 • 7904 • R7903 • R7912 • 7912AD • 7912HB • 7104 • 7A16A • 7A16P • 7A24 • 7A26 • 7A42 • 067-0587-01 • 067-0680-00 • AM503 • PG502 • PG508 • DC510 • DC5010 • FG5010 |