R F Modulator question

[k0ua]

I sent a message to the eBay seller of the modulator I mentioned previously and he responded with the following answer. I hope this means it would work.

New message from: weesolutions (17,332 )

Your previous message
I have 4 surveillance cameras. One is going to my tv on channel 4. With 3 of your modulators can I set them where the other 3 cameras will go over channels 6, 8 and 10?


Yes, you got this modulator figured out right. You can use 3 of these RF modulators to convert the video output from 3 of your cameras into 3 separate TV channels as desired, such as Ch6, Ch8 and Ch10 and then use a 4in 1 out coax RF combiner such as our ebay item 311466234667 to merge the RF outputs from 3 modulators and your 1st camera together into one coax cable and run into the TV so you can see each individual camera video by tuning into the corresponding TV channel.....

Regards,

Jason / Support

Reply


Make an offer

Yes, BUT, aren't you using your TV on "air" not cable? The air channels may not line up with the "cable channels" look at the chart on the website. it says "cable" channels 2 thru 138 and "air" channels 14 thru 83 If your TV is set to "air or antenna as some set say" then it won't line up right with "cable or CATV) So what is your TV set for now with your existing channel 3 modulator. I suspect it is set for air. Do you use it to watch off the air television? Do you see the issue?

View attachment 650320

 

[tallyho8]

My TV is set for antenna but it has no setting for cable. It is a smart TV and only has settings for antenna, smartcast, Airplay, Watch Free, HDMI1. HDMI2 and comp.

It says the NTSC-M (CATV) settings are from 48.25 MHz. Isn't that the MHz that ch2 is on?

 

[k0ua]

My TV is set for antenna but it has no setting for cable. It is a smart TV and only has settings for antenna, smartcast, Airplay, Watch Free, HDMI1. HDMI2 and comp.

When you go to setup and start the scan, there will be a setting for Antenna and a setting for cable. This determines where it looks and how it lable's channel "air" or "cable"

 

[tallyho8]

When you go to setup and start the scan, there will be a setting for Antenna and a setting for cable. This determines where it looks and how it lable's channel "air" or "cable"

But when I go to setup. the only settings are the ones in my last post. No cable setting.

 

[k0ua]

But when I go to setup. the only settings are the ones in my last post. No cable setting.

Let's put it this way, if the television was on a cable TV system how would you scan for the cable channels?

 

[dlctcg]

Many displays (TV's) now only have a ANT / Off Air connection & connecting to a Subscriber Cable would require a Cable Box from the cable provider or a converter; so it is very possible Dudley's explanation is correct.

I know for now you are trying to do this with existing cameras & on a budget.... but another option (for future reference) is to purchase IP over Coax Converters. It would allow you to have a 100MB network connection over your existing coax cable (even at 1200ft), it would be more reliable than a wireless WiFi repeater system & cheaper.... That would allow you to add IP cameras & if you wanted extend the network / WiFi to the barn area. Just something to think about for the future... you can find a pair of the IP over Coax extenders starting at $50 & up. IP cameras are pretty inexpensive also & you don't need to be a network person to set them up....

https://www.amazon.com/dp/B07L6X94X...9Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Again just for future thought... I understand what you are looking to do currently...

 

[tallyho8]

Let's put it this way, if the television was on a cable TV system how would you scan for the cable channels?

I use my large TV to watch Cable TV channels but to watch cable on this smart TV I can disconnect the cable from my large TV and disconnect the coax from the camera from my smart TV and then put the Cable coax on the smart TV where I removed the camera coax and then I put the TV input on antenna and scan for channels.

 

[tallyho8]

I just got a reply from the seller on my second question:

New message from: weesolutions (17,333 )

Your previous message
But on my present VHF modulator on ch 3 or 4 I have the input on my tv set to "air" to pick it up. Will this modulator work on channels 4, 6, and 8 when my TV is set on "air" since it says those are cable channels?



New message from: weesolutions (17,333 )

Yes. This unit support analog air channels (UHF/VHF).
There is a setting in this unit allowing users to switch between cable and air frequencies.

Thank you

 

[MikeInEburg]

Air/Cable channels 2 through 13 are same frequencies, so the air/cable setting on TV won't matter. All other channel frequencies are different.

 

[k0ua]

I just got a reply from the seller on my second question:

New message from: weesolutions (17,333 )

Your previous message
But on my present VHF modulator on ch 3 or 4 I have the input on my tv set to "air" to pick it up. Will this modulator work on channels 4, 6, and 8 when my TV is set on "air" since it says those are cable channels?



New message from: weesolutions (17,333 )

Yes. This unit support analog air channels (UHF/VHF).
There is a setting in this unit allowing users to switch between cable and air frequencies.

Thank you

Then you should be good to go then.