TG501

Tektronix TG501
time mark generator Tektronix TG501 Produced from 1974 to 1995 Manuals Tektronix TG501 Manual (OCR, PDF) Tektronix TG501 Schematics (stitched, PDF) (All manuals in PDF format unless noted otherwise)

The Tektronix TG501 is a time mark generator plug-in for the TM500 system.

Note the output must be terminated into 50 Ω or there may be no signal at all.

There is also a TG501A.

Specifications

Markers: 5 s to 1 ns in a 1,2,5 sequence
Marker Amplitude: ≥1V peak on 5s through 10 ns; ≥750 mV_p-p on 5 ns and 2 ns; ≥ 200 mV_p-pV on 1 ns - All values into 50 Ohm
Trigger Output Signal: Slaved to marker output from 5 s through 100 ns . Remains at 100 ns for all faster markers

External Reference Input: 1 MHz; 5 MHz; 10 MHz; TTL compatible (Internally hard wired so output frequencies counted down to 1 MHz)
Error Readout Range: to ±7,5%
Error Readout accuracy: One digit (±0,1%-points)
Net Weight: 1 kg
Dimensions: 66,8 mm (w/B) x 285,3 mm (d/T) 125,9 mm (h/H)

Check for +15V and adjust if not between 14,3 V and 15,7 V
If +5V is not in between 4,94 V and 5,46 V check U626 (LM741 OpAmp). The old OpAmps tend to fail.
A lot of ICs are placed in non gold plated IC sockets. Contact problems can occure. Removing and inserting ICs helps.
Mounting of A1 board to frame should be done with washers in between, especially near the rear connector. Shorts to conductor tracks can occure otherwise.