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{{Plugin Sidebar 2|
{{Plugin Sidebar
title=Tektronix 7A16P |
|series=7000-series scopes
summary=150/200 MHz vertical amplifier |
|manufacturer=Tektronix
image=Tek 7a16p.jpg |  
|type=7A16P
caption=7A16P |
|summary=150/200 MHz vertical amplifier
introduced=1978 |
|image=Tek 7a16p.jpg
discontinued=1987 |
|caption=7A16P
series=[[7000-series scopes]]|
|introduced=1978
manuals=
|discontinued=1987
<!-- * [http://bama.edebris.com/download/tek/7a16/tek-7a16p.pdf Tektronix 7A16P Manual (PDF)] -->
|manuals=
* [http://bama.edebris.com/download/tek/7a16p/tek-7a16p.pdf Tektronix 7A16P Manual (PDF)]  
* [[Media:070-2308-00.pdf|7A16P Instruction Manual]] (OCR, unstitched letter-size scans)
* [http://w140.com/smb/7a16p_sm.pdf Tektronix 7A16P Manual (OCR, unstitched letter-size scans, PDF)]
<small>
* [https://bama.edebris.com/download/tek/7a16p/tek-7a16p.pdf Alternate copy @ BAMA]
</small>
* [[Media:47W-4493-1.pdf|7A16P and 7B90P Brochure]]
 
{{ROM Images}}
* U3[01]630: [[Media:160-1511-00.bin|160-1511-00]]
* U3[01]830: [[Media:160-1512-00.bin|160-1512-00]]
}}
}}
The '''Tektronix 7A16P''' is a single-channel programmable vertical amplifier for [[:Category:7000 series digitizer mainframes|7000-series digitizing mainframes]]. All functions of the 7A16P can be remotely programmed via the [[GPIB]] 7000-series main interface bus, with exception of the variable gain control and the probe identify switch.


The '''Tektronix 7A16P''' is a single channel, programmable, vertical amplifier for [[:Category:7000_series_digitizer_mainframes|7000-series digitizing mainframes]]. All functions of the 7A16P can be remotely programmed via the [[GPIB]] 7000-series main interface bus, with exception of the variable gain control and the probe identify switch. It is special among the 7000-series vertical amplifiers since it offers a switchable 1 MΩ/50 Ω input impedance, only paralleled by the [[7A42]]. The 7A16P is also unique as it has two input BNC connectors, but is strictly a single channel plugin, but having a switch that routes one of the BNC connectors to the amplifier circuits. This feature is handy in remote-controlled digitizing applications.
The 7A16P is special among the 7000-series vertical amplifiers in that it offers a switchable 1 MΩ/50 Ω input impedance, a feature otherwise only found in the [[7A42]]. The 7A16P is also unique as it has two input BNC connectors, but is strictly a single channel plugin, having a switch that routes one of the BNC connectors to the amplifier circuits. This feature is handy in remote-controlled digitizing applications.


It was mainly intended for use in the [[7612D]] and the [[7912|7912 family]], but can also be used in the [[7854]] if paired with a [[021-0374-00]] and internally modified by adding cables for a 18 pin header and setting jumpers correctly.  
The plug-in was mainly intended for use in the [[7612D]] and the [[7912|7912 family]], but can also be used in the [[7854]] if paired with a [[021-0374-00|021-0374-00 GPIB interface]] and internally modified by adding cables for an 18-pin header and setting jumpers correctly. It is not recommended to use the 7A16P in any conventional 7000-series mainframe since it expects +5.1 V at pins [[7000 Series plug-in interface|B27 and A9 of the mainframe interface]], and shorts them together. A9 is the 5 V light pin on conventional mainframes, and its current rating might be too low for successful operation of the 7A16P.  


{{BeginSpecs}}
{{BeginSpecs}}
{{Spec | Bandwidth 1 MΩ | 0 – 150 MHz }}
{{Spec | Bandwidth | DC – 150 MHz at 1 MΩ, 250 MHz at 50 Ω }}
{{Spec | Bandwidth 50 Ω | 0 – 200 MHz }}
{{Spec | Deflection | 10 mV/Div to 5 V/Div in 1–2–5 sequence }}
{{Spec | Deflection | 10 mV/Div to 5 V/Div in 1–2–5 sequence}}
{{Spec | Input impedance | 1 MΩ // 15 pF or 50 Ω }}
{{Spec | Input impedance | 1 MΩ || 15 pF / 50 Ω }}
{{Spec | Features |
{{Spec | Features |
* Two BNC inputs
* Two BNC inputs
Line 29: Line 36:
}}
}}
{{EndSpecs}}
{{EndSpecs}}
==Links==
* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_amplifier/7A16P.html 7A16P @ amplifier.cd]
* [https://golddredgervideo.com/kc0wox/tek/7a16p/ 7A16P @ KC0WOX]
* [https://www.radiomuseum.org/r/tektronix_programmable_amplifier_7a.html 7A16P @ radiomuseum.org]
{{Documents|Link=7A16P}}


==Internals==
==Internals==
The input stage of the 7A16P contains miniature relays switching between the two available input connectors and selecting the AC and DC coupling modes. Another relay is used to enter a 50 Ω shunt if the corresponding input impedance is selected. Relays then select an optional 10x attenuator before entering the input buffer. This buffer contains an AC coupled MOSFET common drain amplifier and a DC coupled operational amplifier, configured in a feed-beside scheme. Gain switching is accommodated by several junction FETs to enter another 10x attenuator in front of the MOSFET buffer, and to enter 2x and 5x low impedance attenuators after the input buffer.  
The input stage of the 7A16P contains [[miniature relays]] that switch between the two available input connectors, and select AC or DC coupling modes. Another relay is used to connect a 50 Ω shunt if the corresponding input impedance is selected. Further relays then select an optional 10x attenuator before the signal enters the input buffer, which contains an AC-coupled MOSFET common-drain amplifier and a DC-coupled operational amplifier configured in a feed-beside scheme. Gain switching is accommodated by several junction FETs that can insert another 10x attenuator in front of the MOSFET buffer, and 2× / 5× low-impedance attenuators after the input buffer.  


The digital circuitry is build around a [[Motorola 6800]] processor with several MC6821 to drive the switches of the analog circuits and interfacing the modified 7000-series internal GPIB bus.
The digital circuitry is built around a [[Motorola 6800]] processor with several [[Motorola 6821|MC6821]] Peripheral Interface Adapters that drive the switches of the analog circuit, and interface with the modified 7000-series internal GPIB bus.


==Links==
==Variants==
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_amplifier/7A16P.html 7A16P @ amplifier.cd]
Early 7A16P (SN B041606 and below) contain power supply monitoring circuitry that checks for the presence of the -5.2 V rail (A27) that is only present in digitizer mainframes. While the rail is not used in any other circuitry, it will prevent the plugin to work in regular 7K mainframes or the [[7854]].
* [http://golddredgervideo.com/kc0wox/tek/7a16p/ 7A16P @ KC0WOX]
 
* [http://www.radiomuseum.org/r/tektronix_programmable_amplifier_7a.html 7A16P @ radiomuseum.org]
Late 7A16Ps contain pin headers to connect to a [[021-0374-00]], which requires a modification in earlier units (see below). 
 
==Operation with [[021-0374-00]]==
When operated with the [[021-0374-00]], the 7A16P's modified GPIB bus is directly connected to it through an 18-pin, dual-row pin header and 17 leads. Following the labeling from the 021-0374-00 manual, the cable is connected as follows:
 
:{| class="wikitable"
|-
|-
! Pin
! Color
! Connected to
! Function
|-
|  1 || bgcolor="SaddleBrown" |  || U1200 pin 10 || I/O 0
|-
|  2 || bgcolor="red"        |  || U1200 pin 11 || I/O 1
|-
|  3 || bgcolor="orange"      |  || U1200 pin 12 || I/O 2
|-
|  4 || bgcolor="yellow"      |  || U1200 pin 13 || I/O 3
|-
|  5 || bgcolor="Lime"        |  || U1200 pin 14 || I/O 4
|-
|  6 || bgcolor="DeepSkyBlue" |  || U1200 pin 15 || I/O 5
|-
|  7 || bgcolor="violet"      |  || U1200 pin 16 || I/O 6
|-
|  8 || bgcolor="Darkgrey"    |  || U1200 pin 17 || I/O 7
|-
|  9 || bgcolor="SaddleBrown" |  ||  U500 pin 5  || <span style="text-decoration: overline">ATN</span>
|-
|  10 || bgcolor="red"        |  || U1620 pin 6  || <span style="text-decoration: overline">NDAC</span>
|-
|  11 || bgcolor="orange"      |  || U1620 pin 8  || <span style="text-decoration: overline">NRFD</span>
|-
|  12 || bgcolor="yellow"      |  || U1520 pin 9  || <span style="text-decoration: overline">DAV</span>
|-
|  13 || bgcolor="Lime"        |  || U1620 pin 11 || <span style="text-decoration: overline">EOI</span>
|-
|  14 || bgcolor="DeepSkyBlue" |  || U1330 pin 13 || <span style="text-decoration: overline">IFC</span>
|-
|  15 || bgcolor="violet"      |  || U1200 pin 7  || REN
|-
|  16 || bgcolor="Darkgrey"    |  || U1620 pin 3  || <span style="text-decoration: overline">SND</span>
|-
|  17 || bgcolor="White"      |  || U720 pin 8  || <span style="text-decoration: overline">SRQ</span>
|}
 
Additionally, jumper P1622 in the 7A16P should be set according to the [[021-0374-00]] manual. This connects the regular +5 V supply on A1 to the lights pin A9. In a [[7854| 7854 mainframe]], this will cause no direct harm if the rear "Control Illumination" switch is not in the "high" position since the 7854 uses series diodes to drop the light voltage if set to medium. However, the full lights current for all plugins will run through the 7A16P, so setting the switch to "high" is recommended.


==Pictures==
==Pictures==
<gallery>
<gallery>
Tek 7a16p.jpg | 7A16P front panel
Tek 7a16p.jpg                 | 7A16P front panel
Tek 7a16p left internal.jpg| 7A16P left internal
Tek 7a16p left internal.jpg   | 7A16P left internal
Tek 7a16p right internal.jpg| 7A16P right internal
Tek 7a16p right internal.jpg | 7A16P right internal
7A16P_with_cables.jpg | 7A16P right internal modified with cables for connection to [[021-0374-00]].
7A16P_with_cables.jpg         | 7A16P right internal modified with cables for connection to [[021-0374-00]].
7A16P_with_cables_detail.jpg | 7A16P right internal modified for [[021-0374-00]], detail.
7A16P_with_cables_detail.jpg | 7A16P right internal modified for [[021-0374-00]], detail.
Tek_7A16P_late.jpg            | A late version of the 7A16P with connectors for the [[021-0374-00]] GPIB decoder
Tek_7A16P_decoder_conn.jpeg  | Connectors for the [[021-0374-00]] GPIB decoder on a late 7A16P
</gallery>
</gallery>


==Firmware (uploaded BIN files)==
==Components==
* [[Media:160-1511-00.bin|160-1511-00.bin]]  (U30630 and U31630 in 7A16P)
{{Parts|7A16P}}
* [[Media:160-1512-00.BIN|160-1512-00.bin]]  (U30830 and U31830 in 7A16P)
 


[[Category:7000 series vertical plugins]]
[[Category:7000 series vertical plugins]]
[[Category:7000_series_programmable_plugins]]
[[Category:7000 series programmable plugins]]

Latest revision as of 08:38, 7 August 2024

Tektronix 7A16P
150/200 MHz vertical amplifier
7A16P

Compatible with 7000-series scopes

Produced from 1978 to 1987

Manuals
ROM Images
File Pos. Checksum
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 7A16P is a single-channel programmable vertical amplifier for 7000-series digitizing mainframes. All functions of the 7A16P can be remotely programmed via the GPIB 7000-series main interface bus, with exception of the variable gain control and the probe identify switch.

The 7A16P is special among the 7000-series vertical amplifiers in that it offers a switchable 1 MΩ/50 Ω input impedance, a feature otherwise only found in the 7A42. The 7A16P is also unique as it has two input BNC connectors, but is strictly a single channel plugin, having a switch that routes one of the BNC connectors to the amplifier circuits. This feature is handy in remote-controlled digitizing applications.

The plug-in was mainly intended for use in the 7612D and the 7912 family, but can also be used in the 7854 if paired with a 021-0374-00 GPIB interface and internally modified by adding cables for an 18-pin header and setting jumpers correctly. It is not recommended to use the 7A16P in any conventional 7000-series mainframe since it expects +5.1 V at pins B27 and A9 of the mainframe interface, and shorts them together. A9 is the 5 V light pin on conventional mainframes, and its current rating might be too low for successful operation of the 7A16P.

Key Specifications

Bandwidth DC – 150 MHz at 1 MΩ, 250 MHz at 50 Ω
Deflection 10 mV/Div to 5 V/Div in 1–2–5 sequence
Input impedance 1 MΩ // 15 pF or 50 Ω
Features
  • Two BNC inputs
  • 20 MHz bandwidth limit switch
  • Invert switch
  • Probe multiplier / Identify switch sensing inputs

Links

Documents Referencing 7A16P

Document Class Title Authors Year Links
Tekscope 1979 V11 N1.pdf Article An Intelligent, Programmable Transient Digitizer Dale Aufrecht 1979 7912AD • 7A16P • 7B90P
Handshake spring 1986.pdf Article Digital pulse-echo techniques for advanced composites John L. Cline • R.L. Carlsen 1986 7A16P • 7612D • 624 • 4041 • 4907 • MI5010 • 50M30 • TM5003

Internals

The input stage of the 7A16P contains miniature relays that switch between the two available input connectors, and select AC or DC coupling modes. Another relay is used to connect a 50 Ω shunt if the corresponding input impedance is selected. Further relays then select an optional 10x attenuator before the signal enters the input buffer, which contains an AC-coupled MOSFET common-drain amplifier and a DC-coupled operational amplifier configured in a feed-beside scheme. Gain switching is accommodated by several junction FETs that can insert another 10x attenuator in front of the MOSFET buffer, and 2× / 5× low-impedance attenuators after the input buffer.

The digital circuitry is built around a Motorola 6800 processor with several MC6821 Peripheral Interface Adapters that drive the switches of the analog circuit, and interface with the modified 7000-series internal GPIB bus.

Variants

Early 7A16P (SN B041606 and below) contain power supply monitoring circuitry that checks for the presence of the -5.2 V rail (A27) that is only present in digitizer mainframes. While the rail is not used in any other circuitry, it will prevent the plugin to work in regular 7K mainframes or the 7854.

Late 7A16Ps contain pin headers to connect to a 021-0374-00, which requires a modification in earlier units (see below).

Operation with 021-0374-00

When operated with the 021-0374-00, the 7A16P's modified GPIB bus is directly connected to it through an 18-pin, dual-row pin header and 17 leads. Following the labeling from the 021-0374-00 manual, the cable is connected as follows:

Pin Color Connected to Function
1 U1200 pin 10 I/O 0
2 U1200 pin 11 I/O 1
3 U1200 pin 12 I/O 2
4 U1200 pin 13 I/O 3
5 U1200 pin 14 I/O 4
6 U1200 pin 15 I/O 5
7 U1200 pin 16 I/O 6
8 U1200 pin 17 I/O 7
9 U500 pin 5 ATN
10 U1620 pin 6 NDAC
11 U1620 pin 8 NRFD
12 U1520 pin 9 DAV
13 U1620 pin 11 EOI
14 U1330 pin 13 IFC
15 U1200 pin 7 REN
16 U1620 pin 3 SND
17 U720 pin 8 SRQ

Additionally, jumper P1622 in the 7A16P should be set according to the 021-0374-00 manual. This connects the regular +5 V supply on A1 to the lights pin A9. In a 7854 mainframe, this will cause no direct harm if the rear "Control Illumination" switch is not in the "high" position since the 7854 uses series diodes to drop the light voltage if set to medium. However, the full lights current for all plugins will run through the 7A16P, so setting the switch to "high" is recommended.

Pictures

  • 7A16P front panel

    7A16P front panel

  • 7A16P left internal

    7A16P left internal

  • 7A16P right internal

    7A16P right internal

  • 7A16P right internal modified with cables for connection to 021-0374-00.

    7A16P right internal modified with cables for connection to 021-0374-00.

  • 7A16P right internal modified for 021-0374-00, detail.

    7A16P right internal modified for 021-0374-00, detail.

  • A late version of the 7A16P with connectors for the 021-0374-00 GPIB decoder

    A late version of the 7A16P with connectors for the 021-0374-00 GPIB decoder

  • Connectors for the 021-0374-00 GPIB decoder on a late 7A16P

    Connectors for the 021-0374-00 GPIB decoder on a late 7A16P

Components

Some Parts Used in the 7A16P

Part Part Number(s) Class Description Used in
155-0078-00 155-0078-xx • 155-0273-00 • 155-0274-00 Monolithic integrated circuit broadband amplifier 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
155-0135-00 155-0135-00 Monolithic integrated circuit custom legend generator 7A16P • 7B90P
155-0164-00 155-0164-00 Hybrid integrated circuit time slot switch 7A16P • 7B90P • 7A29P
Motorola 6800 156-0426-00 • 156-2413-00 • 156-5472-01 Monolithic integrated circuit 8-bit microprocessor 021-0206-00 • 021-0374-00 • 067-0902-00 • 067-1137-99 • 222 • 222A • 222PS • 2424L • 2445 • 2465 • 2467 • 4051 • 7250 • 7912 • 7912AD • 7A16P • 7A29P • 7B81P • 7B90P • 833 • 834 • 835 • 836 • CG5001 • CG551AP • CG5010 • CG5011 • DF1 • DF2 • DM5010 • FG5010 • MI5010 • SI5010 • PS5004 • PS5010 • SG5010 • Keithley 181 • Keithley 182 • Keithley 175 • Keithley 175A • Keithley 191 • Keithley 192 • Keithley 195 • Keithley 195A • Keithley 197 • Keithley 220 • Keithley 224 • Keithley 230 • Keithley 263 • Keithley 485 • Keithley 580 • Keithley 617
Motorola 6820 156-0427-00 Monolithic integrated circuit "Peripheral Interface Adapter (PIA)" 021-0206-00 • 7A16P • 7B81P • 7B90P • Keithley 175A • Keithley 197 • Keithley 485 • Keithley 580
Motorola 6821 156-0427-03 • 156-1205-00 Monolithic integrated circuit "Peripheral Interface Adapter (PIA)" 067-1137-99 • 4052 • 4052A • 4054 • 4054A • Keithley 191 • 7250 • 7A16P • 7A29P • 7B90P • CG551AP • CG5001 • CG5010 • CG5011
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