TM503

Tektronix TM503
three-bay mainframe Tektronix TM503 Produced from 1972 to (?) Manuals TM503 TM503 Instruction Manual 070-1305-00 TM503 Technical Manual (US Army) TM503A TM503A Instruction Manual 070-6568-00 TM503B TM503B Instruction Manual 070-7808-00 (Manuals are OCRed PDF files unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix TM503 is a three-bay mainframe for the TM500 system.

All bays are low-power. It has a single strap carrying handle on the right side.

The TM503A moves the power switch to the rear and has a swiveling carrying handle that can also act as a stand.

The TM503B retains the power switch position and changes the handle material to plastic. It also allows the power supply/backplane part to be removed from the case so that modules to be repaired on the bench without using extenders (see link below). It also has openings for the TM5000 GPIB feature, but not the connectors nor the power good signal for TM5000 plugins. It serves as the (mechanical) basis for the custom mainframes used for the stand-alone TM5000 variants such as the DM5520, AFG5501, etc.

Key Specifications

Line Voltage	100/110/120/200/220/240 V ±10%
Line Frequency	48 Hz to 440 Hz
Max Power	120 W
Weight	4.3 kg (9.5 lbs)
Size	15.2 cm × 22.1 cm × 38.9 cm (H×W×L) (6.0" × 8.7" × 15.3")
Plugin Supply	+33.5 V / −33.5 V, 1 A max shared +11.5 V, 3.6 A max shared with 17.5 V_AC 17.5 V_AC shared with with +11.5 V_DC rail 2 × 25 V_AC, 2 x 0.5 A

Option 2

Option 2 adds internal pin headers for each slot as well as rear 50-pin and BNC connectors, allowing for custom wiring to, from and between plugins.

On the standard TM503, cutouts for three BNC sockets have been made in the rear frame, meaning that the user only needs to drill holes in the rear cover plate to install the sockets.

Option 7

Option 7 adds barrier keys (214-1593-02) and connections on the rear interface to allow connections between a DC502 Opt.7 to a TR502 or SW503, such that the center or marker frequency of a sweep can be read of the DC502.

Links

See Repairs page for video and replacement PCBs
TM503B @ amplifier.cd
TM503 repair @ paulcarbone.com
The Tektronix Function Generator Teardown - Paul Rako @ electronicdesign.com
TM 503 Power Supply check in and repair by Zenwizard Studios @ YouTube

Documents referencing TM503

Document	Class	Title	Authors	Year	Links
Tekscope 1972 V4 N3 May 1972.pdf	Article	TM500 series - A New Dimension in Plug-in Instrumentation	Bob Ragsdale	1972	TM500 system • TM501 • TM503 • FG501 • FG502 • RG501 • PG501 • SG502 • DC501 • DC502 • PS501 • PS502 • PS503
Tekscope 1973 V5 N5 Sep 1973.pdf	Article	Verification or Calibration? A time saving decision		1973	TM 500 Cal Package • TM503 • TG501 • PG506 • SG503 • SG504
Tekscope 1973 V5 N5 Sep 1973.pdf	Article	A new approach to multifunctional instruments	Bob Metzler	1973	TM500 system • DC505 • PS503 • TM503 • FG502 • MR501 • RG501
Tekscope 1975 V7 N2.pdf	Article	The TM500 Mobile Test Lab	Dick Brown	1975	TM503 • MICS
AX-3557.pdf	Application Note	TM500 Power Module Tester and Utility Power Supply	Warren Collier	1977	067-1201-99 • TM500 • TM501 • TM503 • TM504 • TM506 • TM515 • 040-0652-02