7603: Difference between revisions

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==Internals==
==Internals==
The 7603 was made in various versions for many years, with revisions to some subassemblies like the vertical output amplifier and HV circuits.
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.  
It uses a linear power supply, a fan is optional. CRT deflection plates are not distributed.
 
The vertical output amplifier is built around a [[155-0080-00]] hybrid (U450).
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),
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.   
[[155-0022-00]] trigger channel switch (U324),and the [[7000 series readout system]] chips.   
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[[Media:7603mod36005.pdf|Official Modification 36005]] added a ground strap to the vertical amplifier to prevent >1 GHz oscillations.
[[Media:7603mod36005.pdf|Official Modification 36005]] added a ground strap to the vertical amplifier to prevent >1 GHz oscillations.


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]],
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:
which involves adding a regulator, but there is also a quick'n'dirty method from Rolynn Prechtl:
Line 88: Line 90:
no pulling the LVPS to find a place to add extra components and the best
no pulling the LVPS to find a place to add extra components and the best
part, no cost.
part, no cost.
<br>
<br />
Look for P90 and P10 on the rear edge of the Main Interface ECB (left side
Look for P90 and P10 on the rear edge of the Main Interface ECB (left side
as I remember).
as I remember).
<br>
<br />
Connect P10-1 (gnd) P90-7 or 8 (gnd).
Connect P10-1 (GND) P90-7 or 8 (GND).
<br>
<br />
Connect P10-2 (+5V) to P90-4 (+5V).
Connect P10-2 (+5 V) to P90-4 (+5 V).
<br>
<br />
Two wires and you're done.
Two wires and you're done.
<br>
<br />
Have experienced no problems with the extra current demand from the +5V
Have experienced no problems with the extra current demand from the +5V
regulated supply.
regulated supply.

Revision as of 05:05, 14 January 2019

Manuals – Specifications – Links – Pictures


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. There is also a rack-mount version, the R7603.

The AN/USM 281C is 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 std. P31 phosphor, 8 × 10 divisions of 1.22 cm (Tek T7400/154-0640-00 tube); 15 kV acceleration (-3/+12); Option 8: P11 phosphor
CRT Opt. 4 P31 phosphor, 8 × 10 divisions of 1.0 cm (Tek 154-0672-00 tube); 18 kV acceleration
CRT Opt. 6 P31 phosphor, 8 × 10 divisions of 1.22 cm (Tek 154-0673-00 tube, spectrum analyzer graticule)
Vertical modes Left / Alt / Add / Chop / Right
Trigger Source Left / Vert Mode / Right
Inputs Z Axis
Outputs Camera power, Vert signal, +Gate, +Sawtooth
Line Voltage 100 / 110 / 120 / 200 / 220 / 240 V, +/- 10%, 50—440 Hz
Power 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 where assigned twice. Later models were equipped with an IEC socket, making all Ax 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

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

Official Modification 36005 added a ground strap to the vertical amplifier to prevent >1 GHz oscillations.

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.

Prices

  Year 1973 1976 1980 1984 1990
Mainframe only Catalog price $1,600 $1,800 $2,260 $2,865 $4,235
2015 value $8,500 $7,470 $6,480 $6,510 $7,650
Mainframe with 2 × 7A18 + 7B53 Catalog price $3,520 $3,955 $5,225 $6,880 $10,315
2015 value $18,720 $16,410 $14,970 $15,640 $18,630

Links

Pictures

Internal

Modifications