Cox Mini Box

Is that the Tx, the Rx, or the SNR signal? Are you having issues with the picture? If so, what's going on?

StephanieA said:
Is that the Tx, the Rx, or the SNR signal?

Stephanie, that's a ridiculous question ... first, the minibox isn't two way, there is no Tx to measure.  Second, an SNR of -13????  that would mean noise level is 20x higher than the signal.  You have problems when the SNR approaches 30, meaning the signal is 1000x the noise, you get nothing with an SNR of zero or below (negative SNR means the noise is greater than the signal, zero means they are equal).

If interested, basic formula is SNR (in db) = 10 log(Signal power / noise power)

k5dit, the other questions are good ... are you having problems or is this just an academic question?  My minibox shows (on the Customer support screen) a power level of -11. and an SNR of 37.  At these levels, I have no problem with minibox reception.  HTH

To be fair, we tell users no question is a dumb question. That should apply to moderators too. :-) 

Also, where are you getting your data? Feels about right to me, but I haven't seen much online on what IB/OOB should be at different modulations. Also, does anyone know the IB frequency used by the mini box system to download channel mapping? That frequency and it's SNR would be the mini boxes version of OOB/Tx. Does the mini box give any data on it via diagnostics?

Last, are the SNR values for the tuned channel or across the spectrum? 

As I said, the data came from the Customer Support screen of the minibox ... see here:

The SNR is listed under the tuner info so I assume it's for the tuned channel.

Oh thanks. Those screen shots are useful for future reference. I guess I was asking for any data on what signal margins are for mini boxes. Looking now they use 256, so I would suggest a SNR above 30(35 is better) and a RF signal of +/- 15.