poor high-channel SNR |
We have been having intermittent poor connectivity problems. Techs came out twice, changed connectors and internet filter. (New filter is UBR-2/78DF - anyone know the specs?)
We continue to observe (SB6120 modem) the upper channel (873 MHz, 867 MHz) SNRs drop to 30 and 29 dB from nominal 33-34 with Signal negative 4 to 6 dBV. The 855, 861 MHz channels tend to stay in the 34-36 dB SNR range with Signal negative 1 to 3 dBV. Seems like the top channels are marginal at best.
Communication interruptions have resulted in hundreds of zero-byte files ftp'd to server from our IP cameras, and we even got locked out of our server for a day because of a glitch on one of those transmissions. More than just annoying.
Does anyone have actionable suggestions? There is no competitive source of HSI in our area.