How to calculate the RX Gain on Spectra V3i?

[jurgen1664]

I have several questions that bothers me.
- Why the Spectra V3, when you zoom in on the sensitivity, there is a field RX gain while on the Spectra V3i, it does not exist?
- Can we calculate the RX gain, from the Signal and Noise? If so how?
- If the RX gain is set incorrectly (too low or too high value) that he plays on the depth and / or sensibility?

By exemlpe, this afternoon, I went into the forest to do some tests. I set the frequency to 22.5, and I struggled to stabilize the values ​​of signal and noise, when the disc was on the ground. Is it the 22.5 frequency or something I'm doing wrong?
In addition, I did not see any particular difference with RX Gain set to 7, 9 or 15?
Do I have to lower the RX gain, only when I have EMI? If so this means that I can leave all the time to the maximum value?

 

[cypearl]

I have several questions that bothers me.
- Why the Spectra V3, when you zoom in on the sensitivity, there is a field RX gain while on the Spectra V3i, it does not exist? There is one, try to change zoom and move a bit further up with key arrows
- Can we calculate the RX gain, from the Signal and Noise? If so how? By the rx gain setting field and the probe screen
- If the RX gain is set incorrectly (too low or too high value) that he plays on the depth and / or sensibility? Yes, rx gain it's the preamplifier setting

By exemlpe, this afternoon, I went into the forest to do some tests. I set the frequency to 22.5, and I struggled to stabilize the values ​​of signal and noise, when the disc was on the ground. Is it the 22.5 frequency or something I'm doing wrong? Probably you need to Ground ballance but lowering the Discrimination as well
In addition, I did not see any particular difference with RX Gain set to 7, 9 or 15?This can't be right. Try to raise a bit the discrimination and then test again
Do I have to lower the RX gain, only when I have EMI? If so this means that I can leave all the time to the maximum value?

EMI can play a part to all sensitivity settings and frequencies offset

 

[Rob (IL)]

V3 offered a recommended gain in the Sensitivity screen. Unfortunately, it was often overly conservative and the gain could easily be run higher without problem. Additionally, it became a method of testing loops which also wasn't necessarily a good indicator of loop quality, and many loops were returned to the factory which were perfectly good. They asked all us testers if we used the recommended RX feature. To a man we said no as we were all running hotter settings. I would recommend going no higher than 40%

We've removed the recommended gain, and users should simply set the gain as high as they can and maintain stable operation. This is the same as any other detector.

 

[cypearl]

V3 offered a recommended gain in the Sensitivity screen. Unfortunately, it was often overly conservative and the gain could easily be run higher without problem. Additionally, it became a method of testing loops which also wasn't necessarily a good indicator of loop quality, and many loops were returned to the factory which were perfectly good. They asked all us testers if we used the recommended RX feature. To a man we said no as we were all running hotter settings. I would recommend going no higher than 40%

We've removed the recommended gain, and users should simply set the gain as high as they can and maintain stable operation. This is the same as any other detector.

Thanks Rob I thought it was just of missing the rxgain setting out and so the question about.