[ARC5] Easy selectivity improvement....isn't...

[Kenneth G. Gordon]

On 7 May 2013 at 13:56, J. Forster wrote:

> Ken,
> 
> If you can adjust that generator to sweep around the IF frequency with
> a width of 10kHz to 50kHz sweep width, you probably have what the
> original designers did, and that should be all you need.

I am not sure that the B&K unit can sweep that widely yet. First of all, I have 
to fix the damned thing. 

Ever since I started doing some of the work I have wanted to do for the past 
thirty years, I have had to repair every piece of test equipment I own, except 
my HP oscilloscope.

> If you can FM modulate the 8640A (I don't have one) that should work
> also.

Yes. I can. And I am going to use that unit.

> Frankly, a VNA or SA/TG are both overkill. Also, they are most useful
> in 50 Ohm systems.

Well, as you know, these systems are not 50 ohm. ;-)

Thanks.

Ken W7EKB