29-03-2013, 11:35 PM
Yes, it can be done (I've done it a number of times), but I find it awkward. What you WANT to be able to do is set a centre frequency (e.g. 470 KHz) and then sweep from, say, 20 KHz below that to 20 KHz above it. Unfortunately, if your sweeper is anything like mine (an Exact model 500) you can't do that. Instead, you have to set the sweep start frequency on the main dial and the stop frequency on the knob marked...well, 'stop frequency', believe it or not. Problem is that there's no easy way to determine the centre frequency of the sweep (e.g. 470 KHz) without a separate signal generator to provide an appropriate 'pip' on the oscilloscope at that frequency. Nor is there a way of determining the stop frequency, though this isn't so much of a problem - you can do it well enough by eye on the oscilloscope.
All-in-all, it's a bit of a faff, and much harder than using a proper wobbulator. That said, it isn't by any means impossible, so yes, do have a go.
All-in-all, it's a bit of a faff, and much harder than using a proper wobbulator. That said, it isn't by any means impossible, so yes, do have a go.
