Gain Setting

[DELTA196]

On the XLT The gain is 1-15
On the DFX The gain is 1-4
On the V3 The gain is 1-15

What was the reason for opening up the gain range on the V3 back to XLT levels and how does it differ from the DFX which was capped at 4?
Does DFX run at a lower gain than XLT and V3?

 

[ak_1234]

Hardware. The V is a very different machine than the DFX or the XLT

 

[DELTA196]

AK,
Could you explain more, is the hardware different in XLT and DFX

 

[ak_1234]

The V increases gain linearly - for example, a gain of 3 is 3 times a gain of 1, or a gain of 12 is 12 times a gain of 1...

The DFX increases gain logarithmically - a gain setting of 4 is twice the gain of a gain setting of 3 which is twice the gain of a gain setting of 2 which is twice the gain of a setting of 1.

I suspect the XLT changes gain similarly to the V, but I'd have to go find a schematic to verify. I've never worked on that machine. And probably not high on my priorities of tasks to do .

 

[DELTA196]

AK,
Think I got it.
V gives you a smoother increase in gain as you go up through the range, DFX is more of a rougher adjustment in bigger steps.

 

[Monte]

At least for most people, I think it is. It's one of the reasons I have favored the XLT over the DFX, and certainly an advantage the 'V3' has over the DFX. That was one of the design points I was pleased to see with the Vision/Spectra V3 because it provides a little more "fine tuning" of the RX Gain (Pre-Amp Gain or Signal Balance) with the 'V'. For the bad ground sites I generally hunt, the DFX just seemed to be too coarse in adjustment for my liking.

Monte