Quantum Instruments Cascade Laser Starter Kit manual TPG128 main board

Starter Kit Instruction Manual Maintenance 45

[12]Connect oscilloscope on the output Out1. Load with a 50Ω . Choose a repetition period of about 5 µs.

[13]Pot 10 turns Duration on 10. Adjust capacitor Max duration (2) to have a output pulse of 200 ns +/-5 ns.

[14]Pot 10 turns Duration on 0. Adjust the pot Out 0ns adj (1) in order that the output pulse is 0ns. The pulse is 0 ns long when its shape is triangular with an 1,1 V amplitude (half of the maximum value).

[15]Repeat points [13] and [14] until the val- ues are OK.

[16]Check the output Out 2, check the oper- ation of Gate in. The input Gate in open (high TTL level) = gate open, the output sig- nal is present. Input Gate in short-circuited (low TTL level) = gate closed, the output signal is zero.

[17]Check the +12 V is present on Lemo 00 (+12 V on the centre connector).

2 1

Fig.36: TPG128 main board