Thanks for your replies. With a 50 ohms resistor (about 49 ohms in fact), I've got something interesting but not perfect (I will try to find a 50 ohms terminaison). Unfortunately it didn't work with the counter as terminaison (see attachments).
The two outputs have the same waveforms, I will open the case and try to understand how this is done. And yes it's a 10A-R (the new name is A10-M). Claude On Thursday, 17 April 2014, 21:43, cfo <[email protected]> wrote: On Thu, 17 Apr 2014 06:32:52 +0100, Claude Fender wrote: > > My > unit has two outputs with no options. The problem is the shape of the > waveform (see attachments), it's the same shape for the two outputs. > When I > connect an output directly to the oscilloscope, the shape is nearly > "squared" and when I use a probe, the shape is nearly "sine" ! According to the pict , the low output is supposed to be a CMOS square Is it called A10-R ? www.technical-sys.com/QL%20A10-R%20DS.pdf But termination would as other say be an issue. Dig into your drawer and pull out a BNC-T , and one of those 50ohm termination resistors you know you saved , when you were running old coax based ehternet on rg-58 cable. Have saved me a few times on my Rigol that hasn't got 50 termination built in. Else use your freq counter as termination , it ought to have 50ohm termination. BNC-T on scope , rubi on one end of tee , and counter on other end of tee (50 ohm terminated). CFO Denmark _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
<<attachment: 50ohms_resistor.gif>>
<<attachment: 1megaohm_counter.gif>>
<<attachment: 50ohms_counter.gif>>
_______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
