7934

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Tektronix 7934
500 MHz multi-mode storage mainframe
Tektronix 7934

Produced from 1986 to 1990

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix 7934 is a 500 MHz CRT storage scope multi-mode storage mainframe that accepts two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins.

It is the fastest analog storage oscilloscope ever built with 500 MHz of bandwidth, surpassing the 400 MHz 7834.

Amplifiers are normally installed in the two vertical bays to provide vertical beam deflection, and time-bases in the two horizontal bays to provide horizontal beam deflection.

Amplifiers may be installed in horizontal slots for X-Y operation, and time-bases in vertical slots to provide a raster display.

Two-bay modules are typically installed in the middle two bays, which enables them to provide both vertical and horizontal deflection of the beam, while three-bay modules are typically installed in the three left-most bays (two vertical and one horizontal slot) to maintain compatibility with three-bay mainframes.

The 7934 makes extensive use of custom integrated circuits and hybrid circuits. With the exception of the on-screen readout circuit, the signal path is completely differential and all of the internal wiring is 50 Ω coax.

Many orthogonal modes of operation are available on the 7934, which control the vertical mode, horizontal mode, storage mode, and triggering:

The mainframe has the usual analog ch1/ch2/alt/chop/add vertical-mode functions for the two vertical bays, though in the case of the 7934, the two channels are replaced by "left" and "right" to indicate that each mode will slave the vertical deflection to that vertical bay rather than a specific channel. The mainframe provides chop and alt synchronization signals to both vertical bays, which are used by dual-channel plug-ins to switch between the plug-in's channels when the plug-in is set to alt or chop mode.

Both horizontal compartments are triggerable from either vertical compartment, through an internal signal path. Amplifier plug-ins with two channels provide a switch to select which channel will be given to the mainframe for routing to the triggers.

The horizontal modes (A/B/alt/chop) allow the horizontal deflection to be controlled by either the A or B compartment only, or by both, on a time-sharing basis. The mainframe also provides hold-off signals between the two horizontal, which allows a delaying time-base in the A compartment to trigger a delayed time-base in the B compartment. Both the delaying and delayed timebases can be displayed on the screen at once by selecting the chop horizontal mode.

Connectors on the rear of the mainframe provide a sample of either the A or B compartment's output as well as either compartment's internal trigger signal. Only one connector is available for each function, and the compartment is selected by jumpers on a circuit board near the rear of the case.

Dennis Tillman wrote:

The 7934 is an uncommon scope because it came out late in the 7000 lifecycle (1987). For some odd reason it was not listed in the 1988 catalog but it reappeared in the 1989 and 1990 catalogs. In most respects it is a higher bandwidth 7834 which was discontinued after 1985. The 7834 was a 400 MHz scope, but the 7934 is the fastest analog storage scope Tek made at 500 MHz.

Specifications

  • Bandwidth: 500 MHz
  • readout
  • storage modes: normal, bi-stable (standard and "fast"), variable-persistence (standard and "fast")
  • independently-switchable reduced-scan mode (to aid high-speed writing)
  • timed auto-erase

Prices

Mainframe only − 1990: $15,100 (2019 value: $29,370)

Links

Pictures

Schematics

Custom ICs used in the 7934

Page Class Manufacturer Model Part nos Description Designers Used in
155-0009-00 Monolithic integrated circuit Tektronix M001 155-0009-00 horizontal lockout logic Les Larson 7504 7514 7704 7704A 7844 7834 7854 7904 R7903 7904A 7934 7104
155-0010-00 Monolithic integrated circuit Tektronix M004 155-0010-00 chop divider and blanking Les Larson 7504 7514 7704 7704A 7834 7854 7904 R7903 7904A 7934
155-0011-00 Monolithic integrated circuit Tektronix M012 155-0011-00 clock and chop blanking Les Larson 485 4851 4852 7313 7403N 7504 7514 7603 7613 7623 7633 7704 7704A 7834 7844 7854 7904 7904A R7903 7912AD 7912HB 7934 7104
155-0012-00 Monolithic integrated circuit Tektronix M015 155-0012-00 Z Axis Logic Les Larson 485 4851 4852 7504 7514 7704 7704A 7834 7844 7854 7904 R7903 7904A 7934 7912AD 7912HB 7104
155-0013-00 Monolithic integrated circuit Tektronix M022 155-0013-00 horizontal chop and alt. binary Les Larson 7504 7514 7704 7704A 7834 7854 7904 7904A R7903 7934 7104
155-0022-00 Monolithic integrated circuit Tektronix M036 155-0022-00 155-0022-01 analog multiplexer Gene Andrews 335 468 2220 2221 2230 7403 7503 7603 7613 7623 7623A 7633 7704 7704A 7834 7844 7854 7912AD 7912HB 7904 R7903 7904A 7934 7A12 7A18 7D12 NT-7000 P7001
155-0067-02 Monolithic integrated circuit Tektronix M091B 155-0067-02 SMPS controller Joe Burger Gene Andrews 7704A 7834 7844 7854 7904 R7903 7904A 7912 7934 7104 308 485 P7001
155-0175-00 Monolithic integrated circuit Tektronix H476 155-0175-00 broadband amplifier John Addis Wink Gross Carl Battjes 7904A 7912HB 7934 7104 R7103 7A29 7A29P 7F10 067-0587-02 067-0587-10 11A71 SCD1000 EG&G N-AM-173A
155-0178-00 Hybrid integrated circuit Tektronix H488 155-0178-00 horizontal output amplifier Dave Morgan 7904 7912HB 7934 7104

Custom ICs used in the 7000 series readout system

Page Class Manufacturer Model Part nos Description Designers Used in
155-0014-01 Monolithic integrated circuit Tektronix M019D 155-0014-01 A/D converter Barrie Gilbert 7000 series readout system 5403 5440 5441 5443 5444 7313 7504 7514 7603 7613 7623 7633 7704 7704A 7844 7904 R7903 7904A 7912 7J20 P7001
155-0015-01 Monolithic integrated circuit Tektronix M020F 155-0015-01 analog data switch Barrie Gilbert 7000 series readout system 7504 7313 7704 7503 7504 7514 7834 7844 R7903 7904 7912 R7103 7104 5403 5440 5443 5444 7603 7613 7623 7633 7854
155-0017-00 Monolithic integrated circuit Tektronix M025 155-0017-00 5 MHz decade counter Barrie Gilbert 7000 series readout system
155-0018-00 Monolithic integrated circuit Tektronix M026 155-0018-00 zeros logic control Les Larson 7000 series readout system
155-0019-00 Monolithic integrated circuit Tektronix M027 155-0019-00 decimal point and spacing control Les Larson 7000 series readout system
155-0020-00 Monolithic integrated circuit Tektronix M028 155-0020-00 output assembler Les Larson 7000 series readout system
155-0021-00 Monolithic integrated circuit Tektronix M029C 155-0021-00 timing generator Les Larson 7000 series readout system
155-0023-00 Monolithic integrated circuit Tektronix M160 155-0023-00 character generator (0 1 2 3 4 5 6 7 8 9) Barrie Gilbert 7000 series readout system
155-0024-00 Monolithic integrated circuit Tektronix M161 155-0024-00 character generator (↓ < I / + - + C Δ >) Barrie Gilbert 7000 series readout system
155-0025-00 Monolithic integrated circuit Tektronix M162 155-0025-00 character generator (m μ n p X K M G T R) Barrie Gilbert 7000 series readout system
155-0026-00 Monolithic integrated circuit Tektronix M163 155-0026-00 character generator (S V A W H d B c Ω E) Barrie Gilbert 7000 series readout system
155-0027-00 Monolithic integrated circuit Tektronix M164 155-0027-00 character generator (U N L Z Y P F J Q D) Barrie Gilbert 7000 series readout system