| ??? 01/20/12 06:31 Read: times |
#185576 - very high Responding to: ???'s previous message |
Per Westermark said:
Few things are truly immune. It's a question of how many frequencies it can jump between - how many frequencies that may be jammed and what amount of noise it can survive for each individual frequency.
Military equipment have huge output power and a large availability of frequencies. So an enemy can't produce enough energy to block all possible frequencies - if 1000 frequencies are possible and the transmitter has 10kW power, it takes huge energy to block most of these 1000 frequencies with a high enough power level that the channel is totally wrecked. Remember also that the jamming transmitter may not be at a good position relative to the receiver. End-user equipment are not even near as resilient. Just 13-14 hopping..FHSS. I never look that UHF transmitter above XXX Watt(means below 1KW). at Amateur band.UHF power is restricted. Maybe there's info or link companies(stores) that produce that modules? Thank you Jeckson S Ben |
| Topic | Author | Date |
| RF amplifier for 4XX Mhz | 01/01/70 00:00 | |
| Probably illegal? | 01/01/70 00:00 | |
| maybe... | 01/01/70 00:00 | |
| Look for a legal solution! | 01/01/70 00:00 | |
| It's immune with Jam | 01/01/70 00:00 | |
| Immune? | 01/01/70 00:00 | |
| very high | 01/01/70 00:00 | |
| Don't need kW to jam civilan "toy" equipment | 01/01/70 00:00 | |
| You don't need to look at huge transmitters.? | 01/01/70 00:00 | |
| Are there stores of info how's to implemented that? | 01/01/70 00:00 | |
| Instruments | 01/01/70 00:00 | |
| that's why.. | 01/01/70 00:00 | |
| No - side band disturbances will still be uV and illegal | 01/01/70 00:00 | |
| missing | 01/01/70 00:00 | |
| true | 01/01/70 00:00 | |
| No! No!! No!!! | 01/01/70 00:00 | |
?? | 01/01/70 00:00 | |
| Teh limit is.. | 01/01/70 00:00 | |
| 500mW ... | 01/01/70 00:00 |