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| General Scanning Forum General forum for the discussion of radio communications related information, including discussion regarding scanners and radio receivers. Location specific posts should be directed to the regional forums listed below. |
10-16-2009, 02:16 PM
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Encryption/digital for HS Football? No Way?
Hi, I got my tech license a couple of years ago and the knowledge really does help in the scanning world. I have come up against a wall, however. I take my scanner to local high school football games and USED TO be able to hear the staff chatter from the booth to the field and back again. Not NASA, but I am easily amused. This year, no. I have taken my scanners in to get the "Close Call" and "Signal Stalker"(s) repaired and still no dice. How advanced can this stuff be? It isn't a wired system. I see them talking and I cannot find them. Any ideas? UHF, HI, Busiess band frequencies, I have even programmed all the business band frequencies into my pro 97. Still, crickets.
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10-16-2009, 02:20 PM
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Could very well be encrypted from keeping the other team from listening in  |
10-16-2009, 02:22 PM
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Location: Lansing, MI
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Probably not encrypted or you'd pick up the noise. Get closer to the radios and/or only scan a smaller range of freqs.
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10-16-2009, 02:50 PM
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Oh I hear lots of radio noise. Generally blanket white noise,(no trunking sounds).
I cant see them spending that kind of money though, (for encryptation). As far as closeness, I am far enough away whereas I could throw the radio and hit them. I have also tried sitting across the field, thinking line of sight would help. Has anyone encountered this. We should be talkng low budget stuff.
Last year I resorted to taking my Diamond directional beam antenna even. That is when I figured the signal detection was out, and I was right.
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10-16-2009, 02:52 PM
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Go ask
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10-16-2009, 02:55 PM
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Perhaps they are just using a couple of NexTels.
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10-16-2009, 02:56 PM
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Moderator and DB Admin
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Spread Spectrum radios are available at little more cost than conventional radios, sos I would not be surprised to find out that this is in fact the case.
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--bezking
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10-16-2009, 03:24 PM
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If you're hearing white noise, that's probably encryption. It's not that expensive for the basic stuff. You wouldn't hear trunking since they don't use trunking.
Last edited by rdale; 10-16-2009 at 03:55 PM..
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10-16-2009, 03:24 PM
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Some of the newer Telex RadioCom intercoms are encrypted:
Telex RadioCom 1-to-1 UHF - Full-Duplex, Digitally Encrypted Wireless Intercoms
What kind of headset/radios are they using? This information may help you identify where to start looking.
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10-16-2009, 03:38 PM
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White Noise on what Frequency.??
You might just be hearing the Police, DEA, ATF....
Quote:
Originally Posted by manatee
Oh I hear lots of radio noise. Generally blanket white noise,(no trunking sounds).
I cant see them spending that kind of money though, (for encryptation). As far as closeness, I am far enough away whereas I could throw the radio and hit them. I have also tried sitting across the field, thinking line of sight would help. Has anyone encountered this. We should be talkng low budget stuff.
Last year I resorted to taking my Diamond directional beam antenna even. That is when I figured the signal detection was out, and I was right.
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10-16-2009, 04:02 PM
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It might also be either MotoTRBO or the Icom IDAS / Kenwood NXDN digital which may sound like
digital encryption although it is not. They are just another type of digital and may be tough to lock
onto due to the TDMA format.
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10-16-2009, 04:08 PM
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I did ask. . . I know the coach's son. . . he won't tell. Noise always in the 400 band.
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10-16-2009, 04:12 PM
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Geez, that Telex info is a bag of cats. Guess I will just watch the game if that is the case. Buying a frequency counter would not help it it is encrypted. . . Is a FC a worthwhile purchase? This close call and signal stalker stuff is iffy at best. I have had the processors lock up three times so far.
Last edited by manatee; 10-16-2009 at 04:28 PM..
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10-16-2009, 04:40 PM
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Could be Transcrypt International's VoSec was aka Dark Star. It sounds like white noise (unlike their SC20-400 series) and works with analog transceivers.
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10-16-2009, 04:48 PM
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10-16-2009, 05:31 PM
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Quote:
Originally Posted by manatee
I did ask. . . I know the coach's son. . . he won't tell. Noise always in the 400 band.
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try sneaking a peek at the radio & get a brand name or model # |
10-16-2009, 05:35 PM
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Twas on the field last night. . . I am serious, I have been trying to solve this mystery. If I bought a Frequency Counter, I have seen that they only work with analog transmissions. Is this true of all?
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10-16-2009, 05:39 PM
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Quote:
Originally Posted by gmclam
Perhaps they are just using a couple of NexTels.
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They are not, but I hadn't thought off that. That would be digital and what frequency do those employ? Are they in the banned 800 area? |
10-16-2009, 05:44 PM
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Quote:
Originally Posted by manatee
They are not, but I hadn't thought off that. That would be digital and what frequency do those employ? Are they in the banned 800 area?
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Yes they are in the 800Mhz band, but not the banned portion they are in the commercial portion. you cannot listen to them as they use TDMA, no scanner today can monitor it |
10-16-2009, 05:59 PM
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As competetive as some schools are nothing would surprise me. My school averaged 6000 plus in attendance at a home game so the money was there too.
I remember when I was a kid the coaches headsets were all wired. Our press booth had hook ups the coaches just plugged into. There was then permanent underground wires down to the sideline. The coaches there just plugged in and walked around on a long cord. Several years later I went back and the headsets were wireless on the sideline but still connected to the hardwired system through a small antenna, so they were probably very low powered. The headsets in the booth were still on a cord.
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