| ??? 01/22/12 18:19 Read: times |
#185625 - No - side band disturbances will still be uV and illegal Responding to: ???'s previous message |
Jecksons Ben said:
How do you know if a circuit produces disturbance on other frequencies if you can't scan these frequencies with a suitably narrow-banded receiver? A normal oscilloscope will not get you far - it can't do FFT on radio-frequency signals to show overtone spectrum. And even really high-end GHz-capable multi-GS digital scopes who can sample the radio spectra would normally not have the sensitivity for picking up uV signals.
so that's why 500mW to 1 Watt. Thank you Jeckson S Ben You are totally missing something. With a transmitter emitting 1 W, your RF analyzer will not pick up 1V of signal strength. And the intresting thing isn't what it sees exactly at the center of your transmitting frequency. It's what it sees to the sides. And what overtones it sees. Don't you realize that uV signals are strong enough to disturb if they are leak transmissions at the wrong frequency? Sorry but no. Very much no. Even modules of that power are not safe. Even modules requires you to test your equipment in a shielded room, to make sure that you do not leak RF energy through supply voltage or data signal lines. The equipment I work with do use modules of this power or higher. And we have spent significant amount of time measuring and optimizing the layouts just to make sure the device fulfills all regulations. |
| 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 |