The other switch selects analogue or TTL operation.Quote:
Originally Posted by stupidsexyflanders
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The other switch selects analogue or TTL operation.Quote:
Originally Posted by stupidsexyflanders
Quote:
Originally Posted by Doc
so if i probe the dac ttl output i should get 5 volts ? Is anly a couple of hundred mv .
ok found the problem. because the module is always outputting 5 volts on the ttl input , the dac was also puttinig out 5 volts i have found two bad caps on the dac modulation circuit. So my software must always be set for negative blanking so i dont get the 5 volt ttl output from the dac.Quote:
Originally Posted by stupidsexyflanders
Glad you found the problem
Doc , on the other switch which postion is ttl & which is analog ? the markings are not clear. Thanks.Quote:
Originally Posted by Doc
I would try each setting to find that out.Quote:
Originally Posted by stupidsexyflanders
I can't remember, I think it's marked 'AS'.Quote:
Originally Posted by stupidsexyflanders
Flip it over and connect a 1.5v battery to the yellow and white leads and see if you get a dim output (I believe yellow is +ve).
I think theres a reasonably good description of the switch functions here
http://www.photonlexicon.com/forums/...rwave+switches
Quote:
Originally Posted by norty303
looks lik DAC is cream crackered . Replaced the caps but no joy . The TTL goes straight into the main PIC chip so that must be dud. Bugger . Spoke to Mike at Nu Light and he told me it was likely damaged by the laser module ttl input having a constant output of 5.33 volts. On look out for cheap DAC !
WADR, isn't that where your problems started? ;)Quote:
On look out for cheap DAC