Topic: More about ping rate and "pixel doubling."

[Bob B]

I have been somewhat obsessed figuring out what determines the ping rate of the HB SI units.
This can affect the image quality on the SI screen view and also have an effect on the appearance called "pixel doubling" that has occurred in the software releases since the 360 was introduced............ so I sent a detailed question to Humminbird.

We know that either the water depth, or max depth setting or the SI range......which ever is less.....will control the ping rate.  What I was curious about is whether there was a range/depth where further reduction no longer increased the ping rate.

The answer is that....if reducing the SI range, there is a linear relationship between the ping rate and the SI range, and the ping rate would continue to increase clear down to zero.....as long as the SI range is greater than the depth/max depth setting.
The optimum ping rate for a particular water depth would be where the SI range, the max depth setting and the water depth were all 3 the same.

So, it should be possible to get better images and have some control over the pixel doubling problem by controlling the SI range and max depth settings, which will increase the ping rate, and adjusting the scroll speed slower in the 83/200khz view.

There has also been testing which involves selecting the dual beam transducer selection if using 2D only.....This also results in better 2D sonar with the newer software versions.

I hope I am explaining this well enough to make some sense and be useful.