11A34: Difference between revisions

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|introduced=1987  
|introduced=1987  
|discontinued=(?)  
|discontinued=(?)  
|designers=Murlan Kaufman
|designers=Murlan Kaufman;Cliff Baker
|manuals=
|manuals=
* [[Media:070-5921-01.pdf|Tektronix 11A34 User Reference -01]]
* [[Media:070-5921-01.pdf|Tektronix 11A34 User Reference -01]]
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* [[Media:070-7389-99.pdf|Tektronix 11A34 Extended Service Manual]]
* [[Media:070-7389-99.pdf|Tektronix 11A34 Extended Service Manual]]
* [[Media:Tektronix 11k plugin NVRAM replacement.pdf|Tektronix 11k Plug-in NVRAM Replacement]]
* [[Media:Tektronix 11k plugin NVRAM replacement.pdf|Tektronix 11k Plug-in NVRAM Replacement]]
{{ROM Images}}
}}
}}
The '''Tektronix 11A34''' is a four-channel vertical amplifier plug-in for [[11000-series_scopes|11000-series]] and DSA600-series scopes.
The '''Tektronix 11A34''' is a four-channel vertical amplifier plug-in for [[11000-series_scopes|11000-series]] and DSA600-series scopes.
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==Internals==
==Internals==
===Analog===
===Analog===
Each input channel has a separate attenuator module containing passive 1 megohm attenuators, an AC coupling capacitor, a switch selecting the calibrator or signal input and an [[M474]] buffer amplifier. The calibrator signal turned off inside the plugin when not in use.
Each input channel has a separate [[119-2000-0x]] attenuator module containing passive 1 MΩ attenuators, an AC coupling capacitor,  
a switch selecting the calibrator or signal input, and an [[M474]] buffer amplifier. The calibrator signal is turned off inside the plugin when not in use.


The attenuator module output feeds the + input of the [[M377]] amplifier IC through a (blue) 50 ohm transmission line, one per input channel.  The cable lengths set a standard delay per plugin.
The attenuator module output feeds the non-inverting input of the [[M377]] amplifier IC through a (blue) 50 Ω transmission line, one per input channel.  The cable lengths set a standard delay per plugin.


The M377's inverting input is connected to the [[ACVS]] (Analog Control Voltage System) output.


The M377's - input is connected to the [[ACVS]] (Analog Control Voltage System) output.
The (differential) display outputs of the four amplifiers are hard-wired in parallel and drive the mainframe’s 50 Ω per side input impedance.  The same is true of the trigger outputs of the four amplifiers.


The (differential) display outputs of the four amplifiers are hard-wired in parallel and drive the mainframe’s
The version of the M377 used in the 11A34 has a 200 Ω output impedance per side so that four of them in parallel create a source impedance of 50 Ω.
50 Ω per side input impedance.  The same is true of the trigger outputs of the four amplifiers.


The version of the M377 used in the 11A34 has a 200 Ω output impedance per side so that four of them in parallel
Each M377 amplifier's nominal common-mode output voltage is zero whether enabled or not. When not enabled, each M377 differential output is exactly zero by design.  
create a source impedance of 50 Ω.
This fact is used during calibration by the plugin’s firmware to determine the mainframe’s imbalance and compensate for it during normal operation.
 
Each M377 amplifier's nominal common-mode output voltage is zero whether enabled or not. When not enabled, each M377
differential output is exactly zero by design. This fact is used during calibration by the plugin’s firmware to  
determine the mainframe’s imbalance and compensate for it during normal operation.


Each of the four channels has its own AUX output on dedicated pins of the plug-in interface connector:
Each of the four channels has its own AUX output on dedicated pins of the plug-in interface connector:
Line 72: Line 69:


The AUX signals emerge from each M377 amplifier as differential signal with a 200 Ω source impedance per side.  
The AUX signals emerge from each M377 amplifier as differential signal with a 200 Ω source impedance per side.  
External (on the circuit board) 66.5 Ω shunt resistors on each AUX output bring this down to the 50 Ω source
External (on the circuit board) 66.5 Ω shunt resistors on each AUX output bring this down to the 50 Ω source impedance specified by the 11k plug-in interface.
impedance specified by the 11k plug-in interface.


See also the block diagram below.
See also the block diagram below.
Line 82: Line 78:
The [[11A32]] and 11A34 were originally intended to use [[Intel 8052]] microcontrollers.  
The [[11A32]] and 11A34 were originally intended to use [[Intel 8052]] microcontrollers.  
However, during development, the firmware swelled beyond that chip's 8192-byte maximum on-chip  
However, during development, the firmware swelled beyond that chip's 8192-byte maximum on-chip  
ROM size.  [[Doug Haines]] found an alternate supplier of 8051-compatible chips (OKI Semiconductor)
ROM size.  [[Doug Haines]] found an alternate supplier of 8051-compatible chips (OKI Semiconductor) that offered a 16 KByte on-chip ROM, and that's what the plug-ins wound up with. The finished code size is about 14 KB.
that offered a 16Kbyte on-chip ROM, and that's what the plug-ins wound up with. The finished code size wound up at about 14 KB.


The 11A34 also contains a Dallas Semiconductor DS1220Y NVRAM storing last settings, calibration constants, and instrument serial number.   
The 11A34 also contains a Dallas Semiconductor DS1220Y NVRAM storing last settings, calibration constants, and instrument serial number.   
The DS1220Y contains a battery with a typical life time of 20-30 years.   
The DS1220Y contains a battery with a typical life time of 20-30 years.   


There are also two [[ACVS]] (Analog Control Voltage System) sample and hold modules on two daughter boards that generate the analog voltages needed for gain and offset, including error correction  
There are also two [[ACVS]] (Analog Control Voltage System) sample and hold modules on two daughter boards that generate the analog voltages needed for gain and offset, including error correction under microcontroller firmware control.   
under microcontroller firmware control.   


The microcontroller also provides the digital signals sent to the M377 amplifier, setting one of its six fixed gains, one of its three bandwidths, turning on or off its selected output, and each output's + up or invert state.
The microcontroller also provides the digital signals sent to the M377 amplifier, setting one of its six fixed gains, one of its three bandwidths, turning on or off its selected output, and each output's + up or invert state.
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==Links==
==Links==
* [[11A-series plug-in NVRAM replacement]]
* [[11A-series plug-in NVRAM replacement]]
* [http://www.barrytech.com/tektronix/tek11000/tek11a34.html Tek 11A34 @ barrytech.com]
{{Documents|Link=11A34}}
{{PatentLinks|11A34}}


==Pictures==
==Pictures==
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</gallery>
</gallery>


{{Custom ICs|11A34}}
==Parts==
{{Parts|11A34}}


[[Category:11000 series plugins]]
[[Category:11000 series plugins]]
[[Category:Tekprobe BNC]]
[[Category:Tekprobe BNC]]

Latest revision as of 10:22, 22 September 2024

Tektronix 11A34
Quad channel 300 MHz amplifier
Tek 11A34

Compatible with 11000-series scopes

Produced from 1987 to (?)

Manuals
ROM Images
File Pos. Checksum
160-4009-04 U700 3e2de25b
160-4009-08 U700 8c2d1027
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 11A34 is a four-channel vertical amplifier plug-in for 11000-series and DSA600-series scopes.

Option 23 added four P6134 probes.

There is also a version for video applications, the 11A34V, that was introduced in 1991 (see also 11T5H). It differs from the 11A34 only in its input impedance (75 ohms). Development of the 11A34V was managed by Murlan Kaufman.

more information about 11A34V needed

Key Specifications

Bandwidth DC to 300 MHz. 100 MHz and 20 MHz four pole BWL (Bandwidth Limit) filters may be selected.
Rise time 1.2 ns in 1 GHz mainframe such as the 11402, 11402A, 11403, 11403A, DSA601A, or DSA602A
Deflection 1 mV to 10 V/div in 1% calibrated steps
Input impedance 50 Ω or 1 MΩ
Features
  • High-resolution calibrated DC offset
  • Fast overdrive recovery
  • 5 VRMS input overload protection in 50 Ω mode, with manual reset

Internals

Analog

Each input channel has a separate 119-2000-0x attenuator module containing passive 1 MΩ attenuators, an AC coupling capacitor, a switch selecting the calibrator or signal input, and an M474 buffer amplifier. The calibrator signal is turned off inside the plugin when not in use.

The attenuator module output feeds the non-inverting input of the M377 amplifier IC through a (blue) 50 Ω transmission line, one per input channel. The cable lengths set a standard delay per plugin.

The M377's inverting input is connected to the ACVS (Analog Control Voltage System) output.

The (differential) display outputs of the four amplifiers are hard-wired in parallel and drive the mainframe’s 50 Ω per side input impedance. The same is true of the trigger outputs of the four amplifiers.

The version of the M377 used in the 11A34 has a 200 Ω output impedance per side so that four of them in parallel create a source impedance of 50 Ω.

Each M377 amplifier's nominal common-mode output voltage is zero whether enabled or not. When not enabled, each M377 differential output is exactly zero by design. This fact is used during calibration by the plugin’s firmware to determine the mainframe’s imbalance and compensate for it during normal operation.

Each of the four channels has its own AUX output on dedicated pins of the plug-in interface connector:

signal name positive pin number negative pin number
AUX 1 B38 B37
AUX 2 A36 A35
AUX 3 B32 B33
AUX 4 A32 A31

The AUX signals emerge from each M377 amplifier as differential signal with a 200 Ω source impedance per side. External (on the circuit board) 66.5 Ω shunt resistors on each AUX output bring this down to the 50 Ω source impedance specified by the 11k plug-in interface.

See also the block diagram below.

Digital

The 11A34 and the 11A32 use exactly the same firmware.

The 11A32 and 11A34 were originally intended to use Intel 8052 microcontrollers. However, during development, the firmware swelled beyond that chip's 8192-byte maximum on-chip ROM size. Doug Haines found an alternate supplier of 8051-compatible chips (OKI Semiconductor) that offered a 16 KByte on-chip ROM, and that's what the plug-ins wound up with. The finished code size is about 14 KB.

The 11A34 also contains a Dallas Semiconductor DS1220Y NVRAM storing last settings, calibration constants, and instrument serial number. The DS1220Y contains a battery with a typical life time of 20-30 years.

There are also two ACVS (Analog Control Voltage System) sample and hold modules on two daughter boards that generate the analog voltages needed for gain and offset, including error correction under microcontroller firmware control.

The microcontroller also provides the digital signals sent to the M377 amplifier, setting one of its six fixed gains, one of its three bandwidths, turning on or off its selected output, and each output's + up or invert state.

Digital mainframes do waveform manipulation (addition, subtraction, multiplication, etc.). Consequently only one 11A34 output is on at a time. Analog mainframes however allow more than one channel to be on at a time. This allows the plugin channels to be added or subtracted in the plugin.

Links

Documents Referencing 11A34

Document Class Title Authors Year Links
Electronic-Engineering-Aug-Sept-1988-Versatile-Analogue-Chip-John-Addis.pdf Article Versatile Analogue Chip for Oscilloscope Plug-ins John Addis 1988 M377 • 11A32 • 11A33 • 11A34 • 11A52 • Cascomp • Overdrive • Thermals • Gilbert multiplier • Pat Quinn • Gary Polhemus • Art Metz

Pictures

  • 11A34 front view

    11A34 front view

  • front view

    front view

  • left side view

    left side view

  • right side view

    right side view

  • bottom view

    bottom view

  • Block diagram

    Block diagram

  • Input Attenuators

    Input Attenuators

  • Kernel

    Kernel

  • Analog Control and Signal Amplifiers

    Analog Control and Signal Amplifiers

  • Main Interface

    Main Interface

  • 11A34V and 11T5H

    11A34V and 11T5H

  • 11A34V and 11T5H

    11A34V and 11T5H

  • Prototype 11A34

    Prototype 11A34

  • Prototype 11A34

    Prototype 11A34

  • Prototype 11A34

    Prototype 11A34

  • Prototype 11A34

    Prototype 11A34

  • 11A34V front

    11A34V front

  • 11A34V rear

    11A34V rear

  • 11A34V left internal

    11A34V left internal

  • 11A34V right internal

    11A34V right internal

  • 11A34

    11A34

Parts

Some Parts Used in the 11A34

Part Part Number(s) Class Description Used in
Intel 8051 Monolithic integrated circuit 8-bit microcontroller 11A32 • 11A34 • WFM300
M377 165-2129-03 • 165-2089-06 • 155-2089-05 Monolithic integrated circuit amplifier 11A16 • 11A32 • 11A33 • 11A34 • 11A52 • 2245 • 2245A • 2247 • 2247A • 2252 • TDS410 • TDS420 • TDS460 • TDS520D • TDS540D • TDS580D • TDS680C • TDS684C • TDS714L • TDS724D • TDS754D • TDS784D
M474 Monolithic integrated circuit amplifier 11A32 • 11A34
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