The TG105 is a mains operated, 5Hz - 5MHz Pulse generator with TTL and 50Ω variable outputs. Period and pulse width are each selected by a 6 position range switch, plus a vernier control.
Operating modes are run, external trigger, external gate and manual on-shot or gate. The Complement button inverts both the TTL and 50Ω variable outputs and the Square Wave button gives a square wave at the frequency set by the period control, at both outputs.
ISIS Electronics Internal Link
Manufacturer's Website: http://www.seltec.co.uk/products/details/14635.html