7704: Difference between revisions
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The '''Tektronix 7704''' is a 150 MHz, four-bay mainframe [[introduced in 1969| | The '''Tektronix 7704''' is a 150 MHz, four-bay mainframe, one of the initial oscilloscopes introducing the [[Introduction_to_the_7000-Series|7000-Line]] [[introduced in 1969| in August 1969]]. | ||
It is very lavishly built, using contacts embedded in the aluminium frame for interconnecting the gold plated circuit boards. It also features the [[7000-series remote control connector]] on the rear panel. | |||
It can take two [[7000-series_plug-ins#Vertical plug-ins|7000-series vertical plug-ins]] and two [[7000-series_plug-ins#Horizontal plug-ins|7000-series horizontal plug-ins]]. | |||
It was superseded by the completely redesigned [[7704A]] in 1973. There is also a rack-mount version, the '''R7704''', that was produced until 1985, still with the original specifications (150 MHz) of the 7704. | It was superseded by the completely redesigned [[7704A]] in 1973. There is also a rack-mount version, the '''R7704''', that was produced until 1985, still with the original specifications (150 MHz) of the 7704. | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth | 150 MHz (with [[7A11]] or [[7A16]]) }} | {{Spec | Bandwidth | 150 MHz (with [[7A11]] or [[7A16]]) }} | ||
{{Spec | Calibrator | 4 mV to 40 V in decade steps (2/20/200/400 mV into 50 Ω); 40 mA | {{Spec | Fastest calibrated sweep | 2 ns/Div }} | ||
{{Spec | | {{Spec | Calibrator | DC, square wave (1 kHz or 1/2 B Sweep gate), 4 mV to 40 V in decade steps (2/20/200/400 mV into 50 Ω); 40 mA current loop }} | ||
{{Spec | Z Axis | {{Spec | Vertical modes | Left / Alt / Add / Chop / Right }} | ||
{{Spec | CRT | [[154-0609-00]] | {{Spec | Horizontal modes | A / Alt / Chop / B }} | ||
{{Spec | | {{Spec | Trigger Source | Left / Vert Mode / Right }} | ||
{{Spec | Inputs | | |||
* Z Axis High Speed (60 V<sub>p-p</sub>, DC−100 MHz) | |||
* Z Axis High Sensitivity (2 V<sub>p-p</sub>, DC−2 MHz; 0.4 V<sub>p-p</sub> @ 20 MHz) | |||
}} | |||
{{Spec | Outputs | | |||
* Vertical Signal Out (25 mV/Div into 50 Ω, 0.5 V/Div into 1 MΩ) | |||
* +Sawtooth | |||
* +Gate | |||
* camera power | |||
* probe power | |||
}} | |||
{{Spec | CRT | 8x10 Div @ 1cm/Div internal gradicule, [[154-0609-00]] [[distributed vertical deflection plates]], with P31 [[phosphor]], 24 kV acceleration (+21/-2.96) }} | |||
{{Spec | Options | | |||
* Opt.01 – without readout | |||
* Opt.02 – X-Y compensation network | |||
* Opt.03 – EMI shielding | |||
}} | |||
{{Spec | Power | 90−136 V or 180−272 V, 48−440 Hz, 210 W max. }} | {{Spec | Power | 90−136 V or 180−272 V, 48−440 Hz, 210 W max. }} | ||
{{Spec | Weight | 19.1 kg (42 lbs) }} | {{Spec | Weight | 19.1 kg (42 lbs) }} | ||
{{Spec | Size | 34.2 cm × 30.5 cm × 55.1 cm (H×W×L) }} | {{Spec | Size | | ||
: 34.2 cm × 30.5 cm × 55.1 cm (H×W×L) | |||
: (13.5 in x 12.0 in x 21.7 in) | |||
}} | |||
{{EndSpecs}} | {{EndSpecs}} | ||
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The 7704 does not implement the [[7000 Series plug-in interface|Aux Y input (B16)]], therefore the Trace Separation control on a [[7B92]]/[[7B92A]] will have no effect. | The 7704 does not implement the [[7000 Series plug-in interface|Aux Y input (B16)]], therefore the Trace Separation control on a [[7B92]]/[[7B92A]] will have no effect. | ||
The 7704 contains a mercury-based [[elapsed time meter]] on the low voltage regulator board. | |||
==References== | ==References== |
Revision as of 20:42, 21 December 2023
The Tektronix 7704 is a 150 MHz, four-bay mainframe, one of the initial oscilloscopes introducing the 7000-Line in August 1969.
It is very lavishly built, using contacts embedded in the aluminium frame for interconnecting the gold plated circuit boards. It also features the 7000-series remote control connector on the rear panel.
It can take two 7000-series vertical plug-ins and two 7000-series horizontal plug-ins.
It was superseded by the completely redesigned 7704A in 1973. There is also a rack-mount version, the R7704, that was produced until 1985, still with the original specifications (150 MHz) of the 7704.
Key Specifications
Bandwidth | 150 MHz (with 7A11 or 7A16) |
---|---|
Fastest calibrated sweep | 2 ns/Div |
Calibrator | DC, square wave (1 kHz or 1/2 B Sweep gate), 4 mV to 40 V in decade steps (2/20/200/400 mV into 50 Ω); 40 mA current loop |
Vertical modes | Left / Alt / Add / Chop / Right |
Horizontal modes | A / Alt / Chop / B |
Trigger Source | Left / Vert Mode / Right |
Inputs |
|
Outputs |
|
CRT | 8x10 Div @ 1cm/Div internal gradicule, 154-0609-00 distributed vertical deflection plates, with P31 phosphor, 24 kV acceleration (+21/-2.96) |
Options |
|
Power | 90−136 V or 180−272 V, 48−440 Hz, 210 W max. |
Weight | 19.1 kg (42 lbs) |
Size |
|
Links
Documents Referencing 7704
Document | Class | Title | Authors | Year | Links |
---|---|---|---|---|---|
Tekscope 1969 V1 N5 Oct 1969.pdf | Article | Introducing the New Generation | 1969 | 7000-series scopes • 7504 • 7704 • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A22 • 7S11 • 7M11 • 7B50 • 7B51 • 7B70 • 7B71 • 7T11 • R5030 • 7000 series readout system • Miniature relays • Cam switches • Industrial Design • T7500 • T7700 • P6052 • P6053 • C-50 • C-51 • 204-2 | |
Tekscope 1969 V1 N6 Dec 1969.pdf | Article | A New Logic for Oscilloscope Displays | 1969 | 7000-series scopes • 7A11 • 7A12 • 7A13 • 7A14 • 7A16 • 7A22 • 7B50 • 7B51 • 7B70 • 7B71 • 7S11 • 7T11 • 7504 • 7704 | |
Tekscope 1970 V2 N3 Jun 1970.pdf | Article | The 7000-Series Oscilloscopes as Signal Sources | 1970 | 7704 • 7504 • 7503 | |
Tekscope 1971 V3 N2.pdf | Article | Servicing the 7704 High-Efficiency Power Supply | Charles Phillips | 1971 | 7704 |
Tekscope 1971 V3 N3 May 1971.pdf | Article | Servicing the 7704 CRT Circuit | Charles Phillips | 1971 | 7704 |
Internals
The 7704 was the first Tek lab scope to employ a switch-mode power supply (SMPS)[1]. The SMPS, designed by Gene Andrews, uses an all-discrete resonant half-bridge topology. The CRT voltages and heating are produced in a separate switching stage running off the main SMPS DC output.
Logic, channel switching, and readout use the classic TEK 7000 series custom ICs (155-0009-00 to 155-0022-00), the vertical amplifier (also designed by Andrews) and the horizontal amplifier are completely discrete.
The 7704 does not implement the Aux Y input (B16), therefore the Trace Separation control on a 7B92/7B92A will have no effect.
The 7704 contains a mercury-based elapsed time meter on the low voltage regulator board.
References
- ↑ See Tekscope Vol.4 No.2, March 1972, p.5
Pictures
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7704 front
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7704 rear
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7704 CRT and controls
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Left internal
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Right internal
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Left side of 7704 contains power supply
-
Right side of 7704 contains readout circuitry
R7704
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R7704 front
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R7704 front left (Screen)
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R7704 front right (plugin bay)
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R7704 rear
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R7704 rear left
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R7704 rear right
Components
Some Parts Used in the 7704
Part | Part Number(s) | Class | Description | Used in |
---|---|---|---|---|
155-0009-00 | 155-0009-00 | Monolithic integrated circuit | horizontal lockout logic | 7504 • 7514 • 7704 • 7704A • R7704 • 7834 • 7844 • 7854 • 7904 • R7903 • 7904A • 7934 • 7104 |
155-0010-00 | 155-0010-00 | Monolithic integrated circuit | chop divider and blanking | 7504 • 7514 • 7704 • R7704 • 7704A • 7834 • 7854 • 7904 • R7903 • 7904A • 7934 • 7104 |
155-0011-00 | 155-0011-00 | Monolithic integrated circuit | clock and chop blanking | 485 • 7313 • 7403N • R7403N • 7503 • 7504 • 7514 • 7603 • AN/USM-281C • 7613 • 7623 • 7623A • 7633 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • 7904 • 7904A • R7903 • R7912 • 7912AD • 7912HB • 7934 • 7104 • R7103 • AN/USM-281C |
155-0012-00 | 155-0012-00 | Monolithic integrated circuit | Z Axis Logic | 485 • 7504 • 7514 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • 7904 • R7903 • 7904A • R7912 • 7934 • 7912AD • 7912HB • 7104 • R7103 |
155-0013-00 | 155-0013-00 • 155-0013-01 | Monolithic integrated circuit | horizontal chop and alt. binary | 7504 • 7514 • 7704 • R7704 • 7704A • 7834 • 7854 • 7904 • 7904A • R7903 • 7934 • 7104 |
155-0022-00 | 155-0022-00 • 155-0022-01 | Monolithic integrated circuit | analog multiplexer | 147 • 148 • 149 • 335 • 468 • 1430 • 1441 • 1461 • 1900 • 1910 • 2220 • 2221 • 2230 • 5223 • 5403 • 5440 • 5441 • 5443 • 5444 • 5A38 • 7313 • 7403N • 7503 • 7504 • 7514 • 7603 • AN/USM-281C • 7613 • 7623 • 7623A • 7633 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • R7912 • 7912AD • 7912HB • 7904 • R7903 • 7904A • 7934 • 7A12 • 7A18 • 7A18A • 7A18N • 7B52 • 7B53N • 7D10 • 7D11 • 7D12 • NT-7000 • P7001 |
T7700 | 154-0609-00 | CRT | CRT | 7704 |