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{{Oscilloscope Sidebar|
{{Oscilloscope Sidebar
title=Tektronix 7603|
|manufacturer=Tektronix
image=Tek-7603-front.jpg|
|series=7000-series scopes
caption=Tektronix 7603 |
|model=7603
introduced=1973 |
|summary=100 MHz non-storage mainframe
discontinued=1990 |
|image=7603-4trace.jpg
summary=100 MHz non-storage mainframe|
|caption=Tektronix 7603
manuals=
|introduced=1972
* [http://bama.edebris.com/download/tek/7603/Tektronix_7603_Service_Nov1977.pdf Tektronix 7603 Manual (PDF)]
|discontinued=1990
|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
The '''Tektronix 7603''' is a general-purpose 100 MHz non-storage scope that takes
two [[7000-series_plug-ins#Vertical plug-ins|7000-series vertical plug-ins]]
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]].   
and one [[7000-series_plug-ins#Horizontal plug-ins|7000-series horizontal plug-in]].   


It was made in various versions for many years.  Some have a fan, some don't. 
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)
There are at least two variants of the vertical output amplifier.
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.


The '''AN/USM 281C''' is essentially a 7603 with option 01 (no readout = 7603N).
{{BeginSpecs}}
 
{{Spec | Bandwidth | 100 MHz with [[7A11]], [[7A16]], [[7A17]], [[7A24]], [[7A26]]; 110 MHz with [[7A19]], 70 MHz with [[7A18]] }}
{{MissingSpecs}}
{{Spec | Fastest calibrated sweep | 5 ns/Div }}
{{Spec | CRT |
* Standard:  P31 phosphor, 8 &times; 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 &times; 10 divisions of 1.0 cm  (Tek [[154-0672-00]] tube); 18 kV acceleration
* Opt. 6 : P31 phosphor, 8 &times; 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}}


==Prices==
===Options===
1990: $4,235


==Links ==
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://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.barrytech.com/tektronix/tek7000/tek7603.html Tek 7603 @ barrytech.com]  
Line 31: Line 81:
* [http://scopeboy.com/scopeblog/?p=183 Repair Report #3]
* [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 Repair Report #4] - 7603 with [[7D20]]
* [http://www.sphere.bc.ca/test/tek-parts/tek-info.html No plug-in lights on the 7603 Mainframe]
* [http://www.jvgavila.com/tek7603.htm EB5AGV's Tektronix R7603 / 7D20 page]
* [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://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"
|-
! &nbsp;
! 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>
<gallery>
File:Tek-7603-front.jpg       | 7603  
7603-4trace.jpg        | Tektronix 7603, front view with display
File:Tek-R7603.jpg       | R7603
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>
</gallery>


[[Category:Image needed]]
===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 non-storage mainframes]]
 
[[Category:7000 series mainframes with linear power supplies]]
 
__NOTOC__
Gregor
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