Those two time slots of 15 minute interval plus 5 and 6 that generate the green and blue traces could be used by others. There is no need to generate the full beacon sequence, just a precisely time
Doesn't matter which - just total system gain. That S/W works best if the noise threshold rides at about 10dB above the baseline, then it allows for up to 70 - 80dB of signal peaks. Andy G4JNT www
Yes. All it does is measure the total signal within the 25 - 30 second. You could transmit for the entire one minute and it would still give the same reading. But avoid the preceding minute t
Try http://www.g4jnt.com/beacons.htm and go to PCBCN at the bottom or directly http://www.g4jnt.com/beacons.htm/PCBCN.zip This little prog has been there for some time, mostly forgotton, and
There is no auto reporting feature in that S/W. It generates a log file containing S/N of each beacon / time slot, which the user then has to personally send to the 5MHz working group. Andy G4JNT
Its exactly the same RF hardware as the WSPR beacon was - the only difference is in the PIC code. Details are : 100W RF Out (peak / carrier) 7m high Tee antenna with 14m top span. Gain estim
No it uses the average power over the 5 second period. You could always start it 1s early and stop 1s later Andy G4JNT www.g4jnt.com 2009/3/18 Graham <[email protected]> Andy, Q .. If the
For various reason I'm going to have to switch the beacon off during some day-time periods, but it should always be on from evening through to the following morning. The on-off sessions should be o
That listing was 5.29MHz to prove the S/W - it shows the power and tone frequencies of all three - RAL/WES/ORK on the TA path. Don't forget to offset the time :-) Andy G4JNT www.g4jnt.com 2009/3/1
I sometimes flick the test switch and send a carrier - so you're probably seeing those. Andy G4JNT www.g4jnt.com 2009/3/17 Gary - G4WGT <[email protected]> Andy, I received the original & the
I'm now down to the last two unpopulated PCBs for the AD9852 DDS module http://www.g4jnt.com/projects.htm and http://www.g4jnt.com/newdds.htm . The PCBs are up for grabs for anyone with some spar
Not strictly - Look at it in th efreqeuncy domain. A 500us pulse has its first zero at 2000/pi = 637Hz, so most of the energy is within 1300Hz bandwidth, and a substantial part will pass though the
Graham - I'm not sure I know what you are hoping to do with the sounder pulse. It was incorporated into the 5MHz system to allow propagation investigations into multiple skywave hops and multipa
I've now started transmitting a timed beacon signal on 503.7kHz that is identical in format to that of GB3SSS operated over the winter months of the last two years from Poldhu on 1.9 and 3.5MHz, a
See you just have - got quite a shock until I realised the noise had plummeted as well. Any takers for the 5 and 6 minute slots? Andy G4JNT www.g4jnt.com 2009/3/16 Gary - G4WGT <[email protected]>
It all depends on your resolution bandwith which you don't specify. Pnoise = kTB With my SDR-IQ set to 190kHz span and 131072 point FFT, resolution bandwidth = 1.5Hz and Rx set to +10dB gain to get t
I filled in a couple at 1800, deliberately, by flicking the test switch on my beacon Tx. But there are too many peaks on the green annd blue traces to not suspect someone else is firing up a Tx.
