[Laser] OPT-101 vs PIN diode

[Peter Day]

Art wrote:
> Hi Peter,
> 
> I also wonder if Gordon compensated for the difference in active area 
> between the 2 different devices? Putting the 2 receivers under the same 
> light source isn't a fair test due to the difference in active area.

I don't think he did that test Art but I will mention the idea to him 
when I next see him. I think he used a simple red LED "marker" placed 
at some distance across the backyard and made comparative RX tests 
with that.

> Be careful using the OPT-101, if you have a signal that requires 3 Khz 
> of bandwidth and you set the OPT-101 up to receive 10 or 12 Khz wide, 
> there will be a very substantial loss in NEP.
> 
> I wonder if you Gordon monitors the mailing list?

Not sure... if so I've no doubt he will reply soon! Again, I'll check 
with him.

Best wishes for Xmas and the New Year to all on this most interesting 
of reflectors!

Peter, G3PHO

QRV 1.8MHz to 47GHz and Light

www.g3pho.org.uk