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The Tektronix 7603 is a general-purpose | {{Oscilloscope Sidebar | ||
one 7000-series horizontal plug-in | |manufacturer=Tektronix | ||
|series=7000-series scopes | |||
|model=7603 | |||
|summary=100 MHz non-storage mainframe | |||
|image=7603-4trace.jpg | |||
|caption=Tektronix 7603 | |||
|introduced=1972 | |||
|discontinued=1991 | |||
|designers= | |||
|manuals= | |||
* [[Media:Tek7603-r7603.pdf | 7603/R7603 spec sheet]] | |||
* [[Media:070-1310-00.pdf | 7603/R7603 Operators Manual]] | |||
* [[Media:070-1429-00.pdf | 7603/R7603 Service Manual]] | |||
* [[Media:7603 PS Check.PDF | LVPS layout, help indications for testing]] | |||
* [[Media:Tek 7603 power supply A10 and A11 schematic (redrawn).pdf | Newly drawn clear version of LVPS schematic]] | |||
* <small>[http://bama.edebris.com/download/tek/7603/Tektronix_7603_Service_Nov1977.pdf Tek 7603 Manual] (PDF) @ BAMA</small> | |||
<small> | |||
'''Modifications''' | |||
* [[Media:7603mod36005.pdf | Mod. 36005 (1979): Prevent >1 GHz oscillations in vertical amplifier]] | |||
* [[040-0686-01 | 040-0686-01 (1984): Add pushbutton illumination for plugins]] | |||
* [[Media:040-0654-02.pdf | 040-0654-02 (1980): Add Readout]] | |||
* [[Media:040-0970-00.pdf | 040-0970-00 (1980): Add Fan]] | |||
* [[Media:050-0550-00.pdf | 050-0550-00 (1979): HV multiplier replacement]] | |||
* [[Media:050-1449-01.pdf | 050-1449-01 (1981): Fuse F1000 replacement]] | |||
* [[Media:050-1474-00.pdf | 050-1474-00 (1981): P31 phosphor CRT replacement]] | |||
</small> | |||
}} | |||
The '''Tektronix 7603''' is a general-purpose 100 MHz non-storage, large-screen scope that takes | |||
two [[7000-series_plug-ins#Vertical plug-ins|7000-series vertical plug-ins]] | |||
and one [[7000-series_plug-ins#Horizontal plug-ins|7000-series horizontal plug-in]]. | |||
Variants include the a rack-mount version ('''R7603'''), and the '''AN/USM 281C''', a ruggedized 7603 without readout (was also known as 7603N Option 11S) | |||
that includes two AM-6565 ([[7A15AN11]]) single-trace amplifiers, a TD-1085 ([[7B53AN11]]) dual time base, and a clip-on front panel cover with probes and accessories. | |||
{{BeginSpecs}} | |||
{{Spec | Bandwidth | 100 MHz with [[7A11]], [[7A16]], [[7A17]], [[7A24]], [[7A26]]; 110 MHz with [[7A19]], 70 MHz with [[7A18]] }} | |||
{{Spec | Fastest calibrated sweep | 5 ns/Div }} | |||
{{Spec | CRT | | |||
* Standard: P31 phosphor, 8 × 10 divisions of 1.22 cm (Tek [[T7400]]/[[154-0640-00]] tube); 15 kV acceleration (-3/+12); Option 8: P11 phosphor | |||
* Opt. 4 : P31 phosphor, 8 × 10 divisions of 1.0 cm (Tek [[154-0672-00]] tube); 18 kV acceleration | |||
* Opt. 6 : P31 phosphor, 8 × 10 divisions of 1.22 cm (Tek [[154-0673-00]] tube, spectrum analyzer graticule) | |||
}} | |||
{{Spec | Vertical modes | Left / Alt / Add / Chop / Right }} | |||
{{Spec | Trigger Source | Left / Vert Mode / Right }} | |||
{{Spec | Inputs | Z Axis }} | |||
{{Spec | Outputs | Camera power, Vert signal, +Gate, +Sawtooth }} | |||
{{Spec | Power | 100 / 110 / 120 / 200 / 220 / 240 V, +/- 10%, 50—440 Hz, max. 170 W }} | |||
{{Spec | Weight | 13.6 kg / 30 lb (instrument only) }} | |||
{{Spec | Operating Environment | 0°C – +50°C, < 15,000 ft }} | |||
{{EndSpecs}} | |||
== | ===Options=== | ||
Due to the long production time of the 7603 many options were available. | |||
As some options became standard (e.g. built-in fan) some numbers were assigned twice. | |||
Later models were equipped with an [[IEC connector|IEC320 mains socket]], making all A''x'' (power cable style) options obsolete. | |||
<small> | |||
<div style="column-count:2;-moz-column-count:2;-webkit-column-count:2"> | |||
* Opt.1: Without readout (= 7603N) | |||
* Opt.3: Extra EMI shielding | |||
* Opt.4/Opt.13: Maximum-brightness CRT with reduced area (8x10 cm graticule) | |||
* Opt.5: Fan | |||
* Opt.5 (later models): 400 Hz line frequency | |||
* Opt.6: Spectrum analyzer graticule | |||
* Opt.7: Without Signals Out | |||
* Opt.8: P11 phosphor | |||
* Opt.8 (later models): protective front panel cover, 7603 only | |||
* Opt.11S: Ruggedized variant AN/USM 281C, specified at 50 MHz | |||
* Opt.20: Rear GPIB socket for [[7D20]], removes +Sawtooth, +Gate, vertical signal outputs, R7603 only | |||
* Opt.76: P7 phosphor | |||
* Opt.77: P7 phosphor with spectrum analyzer graticule | |||
* Opt.78: P11 phosphor | |||
</div> | |||
</small> | |||
==Links== | |||
* [http://amplifier.cd/Test_Equipment/Tektronix/Tektronix_7000_series_mainframe/rep-und-kal-7603/Reparaturbericht%20TEKTRONIX%207603.htm Detailed repair report @ amplifier.cd (German)] / [https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Famplifier.cd%2FTest_Equipment%2FTektronix%2FTektronix_7000_series_mainframe%2Frep-und-kal-7603%2FReparaturbericht%2520TEKTRONIX%25207603.htm (translated)] | |||
* [http://www.barrytech.com/tektronix/tek7000/tek7603.html Tek 7603 @ barrytech.com] | |||
* [http://www.teknetelectronics.com/DataSheet/TEKTRONIX/TEKTR_760381630.pdf Catalog page with specs] | |||
* [http://bee.mif.pg.gda.pl/ciasteczkowypotwor/Tek/100NIKON/tektronix_7603_repair.pdf Repair Report #2] | |||
* [http://scopeboy.com/scopeblog/?p=183 Repair Report #3] | |||
* [http://www.jvgavila.com/tek7603.htm Repair Report #4] - 7603 with [[7D20]] | |||
* [http://www.jvgavila.com/tek7603.htm EB5AGV's Tektronix R7603 / 7D20 page] | |||
* [http://www.controlelectronics.com.au/used/refurbished.html Picture of a completely disassembled 7603] | |||
* [http://hakanh.com/dl/7603recap.htm Håkan's 7603 PSU re-cap] | |||
* [https://www.youtube.com/watch?v=WPny2YtwCFg Zenwizard Studios - Tektronix 7603 Lab Check in and Calibration] | |||
{{Documents|Link=7603}} | |||
==Internals== | |||
The 7603 was made in various versions for many years, with revisions to some subassemblies like the vertical output amplifier and HV circuits. A fan is optional. | |||
The vertical output amplifier is built around a [[155-0080-00]] hybrid (U450). CRT deflection plates are not distributed. | |||
Other custom Tek ICs used include [[155-0011-00]] clock & chop blanking (U55), [[155-0022-00]] vertical channel switch (U214), | |||
[[155-0022-00]] trigger channel switch (U324),and the [[7000 series readout system]] chips. | |||
==Modifications== | |||
===Reduce ringing in vertical amplifier=== | |||
[[Media:7603mod36005.pdf|Official Modification 36005]] added a ground strap to the vertical amplifier to prevent >1 GHz oscillations. | |||
===Plugin backlight power=== | |||
Like the other 76xx models, the 7603 has a linear supply which does not provide [[7000 Series plug-in interface|+5 V for lights (A9)]]. | |||
There was an [[Media:040-0686-01.pdf|official Tek modification to add pushbutton illumination for plugins]], which involves adding a regulator, but there is also a quick'n'dirty method from Rolynn Prechtl: | |||
<blockquote> | |||
I've done multiple units the cheap and dirty way. No additional regulator, | |||
no pulling the LVPS to find a place to add extra components and the best | |||
part, no cost. | |||
<br /> | |||
Look for P90 and P10 on the rear edge of the Main Interface ECB (left side | |||
as I remember). | |||
<br /> | |||
Connect P10-1 (GND) P90-7 or 8 (GND). | |||
<br /> | |||
Connect P10-2 (+5 V) to P90-4 (+5 V). | |||
<br /> | |||
Two wires and you're done. | |||
<br /> | |||
Have experienced no problems with the extra current demand from the +5V | |||
regulated supply. | |||
</blockquote> | |||
Alternative addition of a simple buck regulator module is depicted in the [[7603#Modifications 2 | modifications gallery]] below. | |||
==Prices== | |||
{| class="wikitable" | |||
|- | |||
! | |||
! Year | |||
! 1973 | |||
! 1976 | |||
! 1980 | |||
! 1984 | |||
! 1990 | |||
|- | |||
!rowspan=2| Mainframe only | |||
! Catalog price | |||
|align=right| $1,600 | |||
|align=right| $1,800 | |||
|align=right| $2,260 | |||
|align=right| $2,865 | |||
|align=right| $4,235 | |||
|- | |||
! In 2023 Dollars | |||
|align=right| $11,100 | |||
|align=right| $9,700 | |||
|align=right| $8,400 | |||
|align=right| $8,500 | |||
|align=right| $9,900 | |||
|- | |||
!rowspan=2| Mainframe with 2 × [[7A18]] + [[7B53]] | |||
! Catalog price | |||
|align=right| $3,520 | |||
|align=right| $3,955 | |||
|align=right| $5,225 | |||
|align=right| $6,880 | |||
|align=right| $10,315 | |||
|- | |||
! In 2023 Dollars | |||
|align=right| $24,300 | |||
|align=right| $21,300 | |||
|align=right| $19,500 | |||
|align=right| $20,300 | |||
|align=right| $24,200 | |||
|} | |||
==Pictures== | ==Pictures== | ||
<gallery> | |||
7603-4trace.jpg | Tektronix 7603, front view with display | |||
Tek-7603-front.jpg | Tektronix 7603, front view | |||
Tek 7603 opt8.jpg | 7603 Option 8 (blue P11 phosphor) | |||
Tek 7603 f.jpg | 7603 demonstrating use of front panel calibrator | |||
Tek-R7603.jpg | R7603 | |||
R7603 opt20 rear.jpg|R7603 Opt 20 rear (with [[GPIB]] connector for [[7D20]] | |||
R7603 opt20 rear detail.jpg|R7603 Opt 20 rear (with [[GPIB]] connector for [[7D20]] | |||
Late 7603 with digital readout.jpg | Late model [[7603]] with [[7000 series readout system#Microcontroller-based Readout Board|microprocessor-based readout]] | |||
</gallery> | |||
===Internal=== | |||
<gallery> | |||
Tek-7603-left.jpg | 7603, left side - center left: vertical amplifier | |||
Tek-7603-right.jpg | 7603, right side - left: calibrator, center left: readout, center right: cover of HV board | |||
Tek-7603-top.jpg | 7603, top view - top: Z axis board, bottom: horizontal amplifier board | |||
7603-hv-board.jpg | HV board (below SN B330000) | |||
Tek_7603_HV_new.jpg | HV board (later version, DC restorer circuits on daughter boards, neons) | |||
Tek-7603-bp.jpg | Interior view of rear panel showing part of LV regulator board (version without fan) | |||
Tek-7603-back-open.jpg | Rear view with LV regulator board flipped out (version without fan) | |||
Tek-7603-lvreg.jpg | Low voltage regulator board | |||
Tek_7603_lvreg_maint.jpg | Low voltage regulator board fixed for maintenance | |||
Tek-7603-bottom.jpg | Bottom view of backplane. Backplane interconnect board is seen in center, vertical interface and trigger selector piggyback boards on left/top left, logic board on right. | |||
Tek-7603-logic-board.jpg | Logic board (normally situated on back of main interconnect facing the PSU) | |||
Tek-7603-vertif-trigselect.jpg | Trig Select and Vertical Interface boards | |||
Tek-7603-interconnect.jpg | Backplane interconnect without Vertical Interface and Trigger Selector piggyback boards | |||
</gallery> | |||
===Modifications=== | |||
<gallery> | |||
7603_lamp_supply_1.jpg | Pushbutton illumination supply using a small step-down regulator module | |||
7603_lamp_supply_2.jpg | |||
7603_lamp_supply_3.jpg | |||
</gallery> | |||
==Components== | |||
{{Parts|7603}} | |||
{{Custom ICs|7000 series readout system}} | |||
[[Category:7000 series non-storage mainframes]] | |||
[[Category:7000 series mainframes with linear power supplies]] |
Latest revision as of 10:01, 28 October 2024
The Tektronix 7603 is a general-purpose 100 MHz non-storage, large-screen scope that takes two 7000-series vertical plug-ins and one 7000-series horizontal plug-in.
Variants include the a rack-mount version (R7603), and the AN/USM 281C, a ruggedized 7603 without readout (was also known as 7603N Option 11S) that includes two AM-6565 (7A15AN11) single-trace amplifiers, a TD-1085 (7B53AN11) dual time base, and a clip-on front panel cover with probes and accessories.
Key Specifications
Bandwidth | 100 MHz with 7A11, 7A16, 7A17, 7A24, 7A26; 110 MHz with 7A19, 70 MHz with 7A18 |
---|---|
Fastest calibrated sweep | 5 ns/Div |
CRT |
|
Vertical modes | Left / Alt / Add / Chop / Right |
Trigger Source | Left / Vert Mode / Right |
Inputs | Z Axis |
Outputs | Camera power, Vert signal, +Gate, +Sawtooth |
Power | 100 / 110 / 120 / 200 / 220 / 240 V, +/- 10%, 50—440 Hz, max. 170 W |
Weight | 13.6 kg / 30 lb (instrument only) |
Operating Environment | 0°C – +50°C, < 15,000 ft |
Options
Due to the long production time of the 7603 many options were available. As some options became standard (e.g. built-in fan) some numbers were assigned twice. Later models were equipped with an IEC320 mains socket, making all Ax (power cable style) options obsolete.
- Opt.1: Without readout (= 7603N)
- Opt.3: Extra EMI shielding
- Opt.4/Opt.13: Maximum-brightness CRT with reduced area (8x10 cm graticule)
- Opt.5: Fan
- Opt.5 (later models): 400 Hz line frequency
- Opt.6: Spectrum analyzer graticule
- Opt.7: Without Signals Out
- Opt.8: P11 phosphor
- Opt.8 (later models): protective front panel cover, 7603 only
- Opt.11S: Ruggedized variant AN/USM 281C, specified at 50 MHz
- Opt.20: Rear GPIB socket for 7D20, removes +Sawtooth, +Gate, vertical signal outputs, R7603 only
- Opt.76: P7 phosphor
- Opt.77: P7 phosphor with spectrum analyzer graticule
- Opt.78: P11 phosphor
Links
- Detailed repair report @ amplifier.cd (German) / (translated)
- Tek 7603 @ barrytech.com
- Catalog page with specs
- Repair Report #2
- Repair Report #3
- Repair Report #4 - 7603 with 7D20
- EB5AGV's Tektronix R7603 / 7D20 page
- Picture of a completely disassembled 7603
- Håkan's 7603 PSU re-cap
- Zenwizard Studios - Tektronix 7603 Lab Check in and Calibration
Documents Referencing 7603
Document | Class | Title | Authors | Year | Links |
---|---|---|---|---|---|
7000 series brochure March 1973.pdf | Brochure | 7000 series brochure, March 1973 | 1973 | 7A11 • 7A12 • 7A13 • 7A14 • 7A15A • 7A16A • 7A17 • 7A18 • 7A19 • 7A21N • 7A22 • 7B50 • 7B53A • 7B70 • 7B71 • 7B92 • 7CT1N • 7D11 • 7D13 • 7D14 • 7D15 • 7M11 • 7L12 • 7S11 • 7S12 • 7T11 • 7704A • R7704 • 7904 • R7903 • 7603 • R7603 • 7403N • R7403N • 7313 • R7313 • 7613 • R7613 • 7623 • R7623 • P7001 | |
Tekscope 1977 V9 N1.pdf | Article | Counter and Oscilloscope Combination Makes Difficult Measurements | Emory Harry | 1977 | DC505A • 7B53A • 7A18 • 7603 |
Internals
The 7603 was made in various versions for many years, with revisions to some subassemblies like the vertical output amplifier and HV circuits. A fan is optional.
The vertical output amplifier is built around a 155-0080-00 hybrid (U450). CRT deflection plates are not distributed.
Other custom Tek ICs used include 155-0011-00 clock & chop blanking (U55), 155-0022-00 vertical channel switch (U214), 155-0022-00 trigger channel switch (U324),and the 7000 series readout system chips.
Modifications
Reduce ringing in vertical amplifier
Official Modification 36005 added a ground strap to the vertical amplifier to prevent >1 GHz oscillations.
Plugin backlight power
Like the other 76xx models, the 7603 has a linear supply which does not provide +5 V for lights (A9). There was an official Tek modification to add pushbutton illumination for plugins, which involves adding a regulator, but there is also a quick'n'dirty method from Rolynn Prechtl:
I've done multiple units the cheap and dirty way. No additional regulator, no pulling the LVPS to find a place to add extra components and the best part, no cost.
Look for P90 and P10 on the rear edge of the Main Interface ECB (left side as I remember).
Connect P10-1 (GND) P90-7 or 8 (GND).
Connect P10-2 (+5 V) to P90-4 (+5 V).
Two wires and you're done.
Have experienced no problems with the extra current demand from the +5V regulated supply.
Alternative addition of a simple buck regulator module is depicted in the modifications gallery below.
Prices
Year | 1973 | 1976 | 1980 | 1984 | 1990 | |
---|---|---|---|---|---|---|
Mainframe only | Catalog price | $1,600 | $1,800 | $2,260 | $2,865 | $4,235 |
In 2023 Dollars | $11,100 | $9,700 | $8,400 | $8,500 | $9,900 | |
Mainframe with 2 × 7A18 + 7B53 | Catalog price | $3,520 | $3,955 | $5,225 | $6,880 | $10,315 |
In 2023 Dollars | $24,300 | $21,300 | $19,500 | $20,300 | $24,200 |
Pictures
-
Tektronix 7603, front view with display
-
Tektronix 7603, front view
-
7603 Option 8 (blue P11 phosphor)
-
7603 demonstrating use of front panel calibrator
-
R7603
-
Late model 7603 with microprocessor-based readout
Internal
-
7603, left side - center left: vertical amplifier
-
7603, right side - left: calibrator, center left: readout, center right: cover of HV board
-
7603, top view - top: Z axis board, bottom: horizontal amplifier board
-
HV board (below SN B330000)
-
HV board (later version, DC restorer circuits on daughter boards, neons)
-
Interior view of rear panel showing part of LV regulator board (version without fan)
-
Rear view with LV regulator board flipped out (version without fan)
-
Low voltage regulator board
-
Low voltage regulator board fixed for maintenance
-
Bottom view of backplane. Backplane interconnect board is seen in center, vertical interface and trigger selector piggyback boards on left/top left, logic board on right.
-
Logic board (normally situated on back of main interconnect facing the PSU)
-
Trig Select and Vertical Interface boards
-
Backplane interconnect without Vertical Interface and Trigger Selector piggyback boards
Modifications
-
Pushbutton illumination supply using a small step-down regulator module
-
-
Components
Some Parts Used in the 7603