Yes, that's right.
Wasn't aware that I needed another Dongle.What would the 3rd one do?
Right now I use a 2 way Coax splitter, would a 3 way splitter work or would I just need to try and see before I look for an amplified one?
Getting back in SDR. SDRTrunk or Unitrunker?
- Thread starter airwavelistener
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Wasn't aware that I needed another Dongle.What would the 3rd one do?
Right now I use a 2 way Coax splitter, would a 3 way splitter work or would I just need to try and see before I look for an amplified one?
Entering the freqs for Burke county in the sdr calculator, with a 2.4 sample rate, this is what it calculated you need for full coverage, which is 3 dongles. You actually get more like a 2.0-2.2 sample rate from my experience. As far as splitter, depends on the antenna and what kind of splitter you are using.
Will SDRT know what to do with the 3rd Dongle?
Splitter is just the typical 1 in/2 out coax splitter used for Cable TV. Antenna is a Discone.
Splitter is just the typical 1 in/2 out coax splitter used for Cable TV. Antenna is a Discone.
Yes, if you designate the control channel to one dongle, you leave the other two dongles with no channel dedicated to them.SDRT will use either of the available dongles, depending on the freq needed.
On my system I have 7 dongles, 2 are used for control channels on P25 systems, 1 is used for 14 channels on Conventional systems, the other four are free to be used by the control channels for whatever frequency is needed at the time.
I use a 2 port tv splitter on one of my yagi antennas, I use sma male to f type male connects, then the small sma dual splitter cables on the outputs to 4 dongles.
Yes, I do have one Dongle setup as the CC,so good there.
I'll get another Dongle and splitter, should be here in a few days. I will post back then. Thanks again.
I'll get another Dongle and splitter, should be here in a few days. I will post back then. Thanks again.
| 851.1625 | 851.825 | 852.1375 | 852.6125 | 853.0875 | 853.5125 |
| 853.9875 | 854.5375 | 856.1875 | 858.8625 | 859.0375c | 859.7875c |
That site spreads 8.625 mhz
Divide that by 3
Divided by 4
The average dongle covers just over 2 mhz.
This thread has been very educational for a newbie. So does the above statement mean the OP actually needs 4 dongles?
BM82557
Member
Link to Sdr Calculator -- SDR center frequency calculator
Useful tool. Thank you.
If his dongles truly receive 2.4, he might get away with 3 (have not done all the math) He would most likely have to set each dongles min and max range in SDRT to keep them there. There are no listed freqs in 855 or 857 mhz.
I have run NooElec b4 at 2.560 in the past and don’t recall any not tuner available messages.
But now I use 2 Airspy Mini on 3, sometimes 4 systems.
I have run NooElec b4 at 2.560 in the past and don’t recall any not tuner available messages.
But now I use 2 Airspy Mini on 3, sometimes 4 systems.
Glad I checked back in,I was just about to order another Dongle. The two I use now are Nooelec v5. Do I need to two instead?
My listing says you need 3, Dave post says you need 2.15625, that's more than 2 at 2.4 band width, which the band width is likely less in real life, so yes you need another in my opinion.
I don't set the min/max range on mine, sdrt is free to use whatever frequency it needs at any given time, on any unlocked sdr. My unlocked sdrs bounce between 769 and 859 mhz at any given time and are used by 4 different control channels on 4 different towers working on 2 designated/locked sdr's for control channels.
On the unlocked sdrs you will see the center frequency bounce around according to what channel frequency it is using.
I don't set the min/max range on mine, sdrt is free to use whatever frequency it needs at any given time, on any unlocked sdr. My unlocked sdrs bounce between 769 and 859 mhz at any given time and are used by 4 different control channels on 4 different towers working on 2 designated/locked sdr's for control channels.
On the unlocked sdrs you will see the center frequency bounce around according to what channel frequency it is using.
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