It worked, i tested it with the 1S1 that was in there. And then I see the sawtooth and 1S1 signal at the same time. ?By not using the chop knob but on of the order ( can not remember, the sawtooth dissapears but the signal trace stays visible.?
So thanks, This was nice information, learned a bit more about how the 7603 works.
I also did some BW tests. Using the original cables at a 1M plugin gave 3dB BW of 32MHz on a 1A4. The 50 ohm cables, terminated in 50 ohm only at the scope, gave a 37 MHz bandwidth.
Amplitude is in both settings correct when changing V/Div
So i now use two short cables to a 7A24, nice compact. The cables are just long enough to reach the DSO that also has 50 ohm inputs ( and inverse channel 2 function) ( and if i remember well external trigger input is also X in)
Fred PA4TIM
Op 6 okt. 2012 om 11:41 heeft "aobp11" <
aodiversen@...> het volgende geschreven:
?
Hi Fred,
You use the 7603 in XY-mode, so it knows nothing about retrace, whatever you do. Also you can't (simply) wire a blanking signal from 1S2 to 7603.
You could feed the 1S2 horizontal output in a 7A18, set the 7603 to CHOP mode, trigger the 7B70 from the 7A18 and select a suitable 7B70 sweep speed.
Not very handy perhaps, but it's nice to see both 1S2 signals displayed together.
Albert
> If I connect the 1S2 in my 132 to a 7603 the trace does not blanck between sweeps. So I get a bright pot and faint trace above the original. Very irritating. Is there some switch ( on he back) on the scope or 132 I must use ? The scope is on a shelf and rather heavy ( and I have spine pronlems) so I ask here before I ask someone to lift it out for me unneccessary
>
> The 132 is conected by two 50 ohm cables to a 7A24 using both channels and channel 2 inverted.
> Trigger switch to "mode" and both channels on ( can not remember the posistion name ( this plugin has no knob , the plastic broke in two) but it is the midddle position of the channel switch ( two clicks CW from the top position)
>
> The external hoizontal output of the 1S2 ( and 1S1) to the 7B70 "ext volt in" input.
> ---
> Fred pa4tim
