021-0374-00
The Tektronix 021-0374-00 GPIB Decoder is a 7000-series plug-in designed to allow GPIB control of 7A16P or 7A29P programmable amplifiers and/or a 7B90P programmable time base module in a 7854 mainframe. (The manual warns that of all 7000 series mainframes, only the 7854 has adequate +5 V supply capacity.)
The -P type plugins were originally designed for the 7000 series digitizers like the 7912AD that have a built-in GPIB interface.
The 021-0374-00 replicates the functions of that interface, receiving commands from GPIB and translating them to the internal serial format expected by the plugins. It is based on a Motorola 6802 microcontroller and a TMS9914 GPIB interface chip.
The interface must be installed in the left horizontal (A timebase) bay. It addresses left vertical, right vertical and right horizontal plugins through GPIB sub-addresses 1, 2 and 3, respectively. Data connections from the 021-0374-00 the plugins require flat cables because the relevant bus lines are n/c on the 7854 backplane.
Links
Pictures
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Front view of an early GPIB Decoder
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Front view of a late GPIB Decoder
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Left side
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Closeup of left side
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Right side
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Closeup of right side
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Rear view of the front panel
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Angeled view
Mounting Procedure
Location of electrical components
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A late version of the 7A16P plugin is needed
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Location of the connectors for the GPIB decoder on a 7A16P
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Right side of a 7A29P plugin
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Location of the connectors for the GPIB decoder on a 7A29P
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A late version of the 7B90P plugin is needed
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Location of the connectors for the GPIB decoder on a 7B90P
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Location of the zener diode V330 on a late 7B90P
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Location of the connectors to the plugins on the GPIB decoder
Mechanical components
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Bracket for mounting the programmable plugins to the decoder
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Bracket for mounting the programmable plugins to the decoder
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Bracket for mounting the programmable plugins to the decoder
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Bracket for mounting the programmable plugins to the decoder
Firmware (uploaded BIN files)
Part number | Location | Used in |
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160-3533-00.bin (?) | U4060 | up to #B010190 |
160-3533-01.bin (?) | U4060 | #B010191 and newer |
Components
Some Parts Used in the 021-0374-00
Part | Part Number(s) | Class | Description | Used in |
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Motorola 6800 | 156-0426-00 | Monolithic integrated circuit | 8-bit microprocessor | 021-0206-00 • 021-0374-00 • 067-0902-00 • 067-1137-99 • 222 • 222A • 222PS • 2424L • 2445 • 2465 • 4051 • 7912 • 7912AD • 7A16P • 7A29P • 7B81P • 7B90P • 833 • 834 • CG5001 • CG551AP • CG5010 • CG5011 • DF1 • DF2 • DM5010 • MI5010 • SI5010 • PS5004 • PS5010 • SG5010 |
TMS9914 | 156-1444-00 • 156-1444-01 | Monolithic integrated circuit | GPIB controller | 2221 • 2230 • 2424L • 2440 • 4052A • 4054A • 021-0374-00 • 067-1137-99 • DC5009 • DC5010 • DM5010 • DM5120 • DM5520 • MI5010 • SG5010 • SG5030 • SI5010 • PS5004 • PS5010 |