cbs trouble

[techpro2004]

is cbs in nyc doing maintenance as the channel was down for a while but appears up now.

[techpro2004]

it's back. Getting the following on cbs

Virtual Channel 2.1 WCBS-HD
Frequency 605.000 MHz
Program Number 1
Modulation Lock none
Signal Strength 100%
Signal Quality none
Symbol Quality none
Streaming Rate none


Just enabled send diagnostics and ran a scan, my id's are:

10A54BD7
and
10A539F7

both are runing firmware 20250805beta1

[techpro2004]

cbs is working again. can someone tell me what is going on??? thanks.

[signcarver]

Whenever I see 100% signal strength I suspect that unless it is also affecting other devices. If you have a dev unit one could see the dBm values and have some idea how far above 100% it is. Do you have a proper LTE filter?

[kyl416]

None of the NYC area bandscans show any simultaneous changes with WCBS's signal like you would see if they switched to one of the backup transmission sites. WCBS is on RF 36, so it might be 5G interference. It could also be atmospheric boost causing Atlantic City's WMGM or Hartford's WFSB to interfere with WCBS in your area.

[techpro2004]

It is down again. I am using this (https://www.amazon.com/dp/B0C34KVK34?re ... tle_3&th=1) preamp which includes a lte filter

[techpro2004]

no dev unit unfortunately but I do have 2x flex 4k tuners and it is happening on both of them fyi, this affects every 2.* channel not just cbs.

[techpro2004]

I recently updated pfsense and set up tailscale between 2 locations but I have 0 endpoints setup in tailscale but then why would this only affect 2.*

[techpro2004]

I unplugged the coax from my splitter and connected it to an insignia tv still no dice then I tried low power mode on my preamp but that did not work either

[techpro2004]

rebooted preamp and hdhrs no dice

[jasonl]

Try without the preamp. WCBS is coming in like 16% signal strength less than WNBC/WNJU when they should be about the same (WCBS runs at slightly lower power but is on the upper antenna, while WNBC has more power but is on the lower antenna). There is no way to make a filter that preserves 36 perfectly while blocking the lowest 5G frequencies perfectly as the frequencies are too close together and there's only so much you can do with passive components, but there is a lot of variation from one filter design to the next in how badly 36 is impacted and how sharp the dropoff is. The one in there isn't looking so great.

[techpro2004]

So fortunately, I have a roofing guy here soon. What antenna/preamp do you recommend? thanks.

I am located within a short distance from the norman j. levy park and preserve

[techpro2004]

Just ordered this (https://www.amazon.com/dp/B0B94KX7GM?re ... asin_title) please let me know if it is a good one? thanks.

[nickk]

Just ordered this (https://www.amazon.com/dp/B0B94KX7GM?re ... asin_title) please let me know if it is a good one? thanks.

Very good antenna. I use one of these myself.

[techpro2004]

Thanks, I appreciate it. Just wondering how large it is. I currently use a channel master pro model.