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.
|Bandwidth||100 MHz with 7A11, 7A16, 7A17, 7A24, 7A26; 110 MHz with 7A19, 70 MHz with 7A18|
|Fastest calibrated sweep||5 ns/Div|
|Vertical modes||Left / Alt / Add / Chop / Right|
|Trigger Source||Left / Vert Mode / Right|
|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|
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
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.
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.
|Mainframe only||Catalog price||$1,600||$1,800||$2,260||$2,865||$4,235|
|Mainframe with 2 × 7A18 + 7B53||Catalog price||$3,520||$3,955||$5,225||$6,880||$10,315|
- 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
Custom ICs used in the 7603
Custom ICs used in the 7000 series readout system
|Page||Class||Manufacturer||Model||Part nos||Description||Designers||Used in|
|155-0014-01||Monolithic integrated circuit||Tektronix||M019D||155-0014-00 • 155-0014-01||A/D converter||Barrie Gilbert||7000 series readout system • 7854 • 7J20 • 7L5 • P7001|
|155-0015-01||Monolithic integrated circuit||Tektronix||M020F||155-0015-00 • 155-0015-01||analog data switch||Barrie Gilbert||7000 series readout system • 7854|
|155-0017-00||Monolithic integrated circuit||Tektronix||M025||155-0017-00||5 MHz decade counter||Barrie Gilbert||7000 series readout system • 7854|
|155-0018-00||Monolithic integrated circuit||Tektronix||M026||155-0018-00||zeros logic control||Les Larson||7000 series readout system|
|155-0019-00||Monolithic integrated circuit||Tektronix||M027||155-0019-00||decimal point and spacing control||Les Larson||7000 series readout system|
|155-0020-00||Monolithic integrated circuit||Tektronix||M028||155-0020-00||output assembler||Les Larson||7000 series readout system|
|155-0021-00||Monolithic integrated circuit||Tektronix||M029C||155-0021-00 • 155-0021-01||timing generator||Les Larson||7000 series readout system • 7854|
|155-0023-00||Monolithic integrated circuit||Tektronix||M160||155-0023-00||character generator (0 1 2 3 4 5 6 7 8 9)||Barrie Gilbert||7000 series readout system|
|155-0024-00||Monolithic integrated circuit||Tektronix||M161||155-0024-00||character generator (↓ < I / + - + C Δ >)||Barrie Gilbert||7000 series readout system|
|155-0025-00||Monolithic integrated circuit||Tektronix||M162||155-0025-00||character generator (m μ n p X K M G T R)||Barrie Gilbert||7000 series readout system|
|155-0026-00||Monolithic integrated circuit||Tektronix||M163||155-0026-00||character generator (S V A W H d B c Ω E)||Barrie Gilbert||7000 series readout system|
|155-0027-00||Monolithic integrated circuit||Tektronix||M164||155-0027-00||character generator (U N L Z Y P F J Q D)||Barrie Gilbert||7000 series readout system|