The size of the cone where it meets the bottom is very different in size. I think the higher frequency shows you a bottom area that is 1/3rd the depth, so you're looking at 100 feet in width. On the 50hz you're only seeing 25 feet in width. I may have this backwards but that's the main difference - the angle of the cone and therefore how large it is when it meets the bottom.
Increase the gain (i.e. sensitivity) on your 50khz frequency. You can see it is trying to show those marks from 150ft and deeper on the 50khz but it just need a little manual intervention. Generally speaking 50khz is a wider, but deeper penetrating cone angle than 200khz. Fish marks for 50khz will also generally have a lower resolution.
200khz gives you more details, in this case, maybe small fishes & debris in the water. 50khz gives you more range with a wider cone but you won't be able to see smaller fishes.
Lower frequency equals better depth performance. 30-55 is great for 600+ feet of water where 200 won't even read bottom. Newer Chirp sonars use a modulating pulse of frequency to give a better all around return with greater target separation. The 200 is simply just showing more as you are shallow and it's cone is picking up more targets at that depth.
cone size. 200khz 19" 50khz 24" it sees a little more. even better in deeper water. I think that's bait fish further away from center due to a larger cone.
The size of the cone where it meets the bottom is very different in size. I think the higher frequency shows you a bottom area that is 1/3rd the depth, so you're looking at 100 feet in width. On the 50hz you're only seeing 25 feet in width. I may have this backwards but that's the main difference - the angle of the cone and therefore how large it is when it meets the bottom.
Increase the gain (i.e. sensitivity) on your 50khz frequency. You can see it is trying to show those marks from 150ft and deeper on the 50khz but it just need a little manual intervention.
Generally speaking 50khz is a wider, but deeper penetrating cone angle than 200khz. Fish marks for 50khz will also generally have a lower resolution.
200khz gives you more details, in this case, maybe small fishes & debris in the water. 50khz gives you more range with a wider cone but you won't be able to see smaller fishes.
Lower frequency equals better depth performance. 30-55 is great for 600+ feet of water where 200 won't even read bottom. Newer Chirp sonars use a modulating pulse of frequency to give a better all around return with greater target separation. The 200 is simply just showing more as you are shallow and it's cone is picking up more targets at that depth.
Wrong
I think this have something to do with the gains and sensitivity/and range/depth. Configuration in the 50khz part of the screen
Sonar cone is greater in one.
Example: base of cone in one is 90 sq.feet, while in the other is 1800 sq.feet
cone size. 200khz 19" 50khz 24" it sees a little more. even better in deeper water. I think that's bait fish further away from center due to a larger cone.
that could be backwards but maybe on the right track
200hz is a narrower cone while 50 is wider. Apparently 200 is better for bottom, while 50 better for below your boat
50hz cone is bigger and will go deeper in the water