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7503: Difference between revisions
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|series=7000-series scopes | |series=7000-series scopes | ||
|model=7503 | |model=7503 | ||
|image= | |image=Tektronix 7503 front in operation.jpg | ||
|caption=Tektronix 7503, | |caption=Tektronix 7503, 2×[[7A12]], [[7B53A]] | ||
|introduced=1970 | |introduced=1970 | ||
|discontinued=1972 | |discontinued=1972 | ||
|summary=90 MHz non-storage mainframe | |summary=90 MHz non-storage mainframe | ||
|designers=Phil Crosby | |designers=Phil Crosby;Hans Springer | ||
|manuals= | |manuals= | ||
* [[Media:070-1039-00.pdf|7503 Instruction Manual]] ( | * [[Media:070-1039-00.pdf|7503 Instruction Manual]] (schematics, OCR) | ||
}} | }} | ||
The '''Tektronix 7503''' is a 90 MHz 7000-series mainframe with three module bays, [[introduced in 1970]]. It was effectively replaced by the larger-screen [[7603]] in 1972. | The '''Tektronix 7503''' is a 90 MHz 7000-series mainframe with three module bays, [[introduced in 1970]]. It was effectively replaced by the larger-screen [[7603]] in 1972. | ||
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The 7503 was Tek's first scope to use a [[harmonica connector]] for inter-board wiring. | The 7503 was Tek's first scope to use a [[harmonica connector]] for inter-board wiring. | ||
Prior to this, inter-board wiring had either mainly been point-to-point soldered. | Prior to this, inter-board wiring had either mainly been point-to-point soldered. | ||
Other approaches were taken on certain instruments, for example the [[7704]], in which pins sticking out of the chassis mate with holes in the boards that receive the pins and make electrical contact. | Other approaches were taken on certain instruments, for example the [[7704]], in which pins sticking out of the chassis mate with holes in the boards that receive the pins and make electrical contact. | ||
Unlike later three-slot (7xx3) mainframes, the 7503 does supply the +5 V lamp rail, which helps with the contemporary [[7A12]] plug-in. | |||
It also features the [[7000-series remote control connector]] at the rear of the unit. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth | 90 MHz with [[7A11]], [[7A16]] (and faster plug-ins); 75 MHz with [[7A12]], [[7A13]], [[7A14]] }} | {{Spec | Bandwidth | 90 MHz with [[7A11]], [[7A16]] (and faster plug-ins); 75 MHz with [[7A12]], [[7A13]], [[7A14]] }} | ||
{{Spec | Fastest calibrated sweep | 5 ns/Div }} | {{Spec | Fastest calibrated sweep | 5 ns/Div }} | ||
{{Spec | CRT | [[T7500|T7500 (154-0608-xx)]], 18 kV total acceleration (+15/ | {{Spec | CRT | [[T7500|T7500 (154-0608-xx)]], 18 kV total acceleration (+15/−2.96) }} | ||
{{Spec | Vertical modes | Left / Alt / Add / Chop / Right }} | {{Spec | Vertical modes | Left / Alt / Add / Chop / Right }} | ||
{{Spec | Trigger Source | Left / Vert Mode / Right }} | {{Spec | Trigger Source | Left / Vert Mode / Right }} | ||
{{Spec | Calibrator | 4 mV to 40 V in five decade steps, 40 mA, 1 kHz ±0.5% }} | {{Spec | Calibrator | 4 mV to 40 V in five decade steps, 40 mA, 1 kHz ±0.5% }} | ||
{{Spec | Outputs | Side panel: Vert signal, +Gate, +Sawtooth; At CRT: Camera power }} | {{Spec | Outputs | Side panel: Vert signal, +Gate, +Sawtooth; At CRT: Camera power }} | ||
{{Spec | Line Voltage | | {{Spec | Line Voltage | 90−110 V / 104−126 V / 112−136 V / 180−220 V / 208−252 V / 224−272 V, 50−440 Hz }} | ||
{{Spec | Power | Max. 258 W }} | {{Spec | Power | Max. 258 W }} | ||
{{Spec | Weight | 21.3 kg / 47 lb (instrument only) }} | {{Spec | Weight | 21.3 kg / 47 lb (instrument only) }} | ||
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==Internals== | ==Internals== | ||
In addition to two custom Tek ICs, the 7503 uses CA3046 transistor arrays ([[156-0048-00]]) in eight places (five on the regulator board). The vertical and horizontal amplifiers are built using | In addition to two custom Tek ICs, the 7503 uses CA3046 transistor arrays ([[156-0048-00]]) in eight places (five on the regulator board). The vertical and horizontal amplifiers are built using discrete transistors. | ||
The 7503 has an X-Y delay compensation network that is activated when the H plugin is an amplifier or a timebase in amplifier mode (see [[7000 Series plug-in interface]]). | The 7503 has an X-Y delay compensation network that is activated when the H plugin is an amplifier or a timebase in amplifier mode (see [[7000 Series plug-in interface]]). | ||
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Like other 75xx and 76xx mainframes and the 7504, the 7503 has a linear power supply, as opposed to the switchmode supplies used in the later 4-slot mainframes. In addition to the +5 V, ±15 V, ±50 V rails common to the 7000 series, internally (not on the plug-in slots) it has a +75 V output not found in later models, and a +150 V instead of the later +130 V. | Like other 75xx and 76xx mainframes and the 7504, the 7503 has a linear power supply, as opposed to the switchmode supplies used in the later 4-slot mainframes. In addition to the +5 V, ±15 V, ±50 V rails common to the 7000 series, internally (not on the plug-in slots) it has a +75 V output not found in later models, and a +150 V instead of the later +130 V. | ||
The 7503 contains a mercury-based [[elapsed time meter]] on the rear of the main interface board. | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek 7503 front.JPG|Front | Tektronix 7503 front in operation.jpg | ||
7503 DSC 0883.JPG|Plug-in bay | Tektronix 7503 front in operation.jpg | ||
7503 DSC 0895.JPG|Plug-in connectors missing sides | Tek 7503cl3.jpg | ||
7503 DSC 0894.JPG|Horizontal amp on top | Tek 7503 front.JPG | Front | ||
7503 DSC 0891.JPG|Vertical amp on the side | 7503 DSC 0883.JPG | Plug-in bay | ||
7503 DSC 0888.JPG|Left view, delay cable, CRT | 7503 DSC 0895.JPG | Plug-in connectors missing sides | ||
7503 DSC 0887.JPG|Left view, power supply | 7503 backplane r1.jpg | 7503 backplane PCB [[Repairing 7000-series plug-in sockets#Replacing the connectors with modern equivalents|mid-repair]] | ||
7503 DSC 0886.JPG|Right view, mains frequency transformer | 7503 DSC 0894.JPG | Horizontal amp on top | ||
7503 DSC 0885.JPG|Readout board | 7503 DSC 0891.JPG | Vertical amp on the side | ||
DSC 0878.JPG|Right side connector panel | 7503 DSC 0888.JPG | Left view, delay cable, CRT | ||
DSC 0880.JPG|Rear | 7503 DSC 0887.JPG | Left view, power supply | ||
7503 DSC 0886.JPG | Right view, mains frequency transformer | |||
7503 DSC 0885.JPG | Readout board | |||
DSC 0878.JPG | Right side connector panel | |||
DSC 0880.JPG | Rear | |||
Tek 7503cl3.jpg | Tek 7503cl3.jpg | ||
Tek 7503cl1.jpg | Tek 7503cl1.jpg | ||
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</gallery> | </gallery> | ||
{{ | ==Components== | ||
{{Parts|7503}} | |||
{{Custom ICs|7000 series readout system}} | {{Custom ICs|7000 series readout system}} | ||
[[Category:7000 series non-storage mainframes]] | [[Category:7000 series non-storage mainframes]] | ||
[[Category:7000 series mainframes with linear power supplies]] | [[Category:7000 series mainframes with linear power supplies]] | ||