Think I've found a way of getting the answer without having to back to first FFT principles - it had to be possible. Take a DC voltage of level = 1.0, In a unit resistance the power also = 1. When ch
Ok - Just resurrected the old linear 5W LF test transmitter so that will do if necessary. The synth trace is rock steady on a scope when compared with its input reference signal, so no nasty internal
Yes, I've now got a commercial synth that goes down to 100kHz in 1Hz steps which should solve your need for N/M Hz intervals. It can supply up to 13dBm so putting that into my (-36dBi) gain antenna m
So what about the power absorbed when you receive the signal normally? Surely, for the law to be enforceable, there must be a minimum power below which you are deemed to 'not be stealing power'. Or i
I should have said, by pulse I mean a break in carrier, so the actual pulses are 900ms, 800ms and a few at 700ms. On Alberto's plot the main zero at 10Hz is very clear, and there is adefinite dip at
The pulses have a width of either 100, 200 or 300us. The time/date is carried by pulse width mod :100ms = 0, 200ms = 1, with a framing code at the 52 - 59 second interval of '01111110'. Parity checks
I am currently testing a low power experimental beacon on 1960.000kHz +/- 1Hz. It uses a transmission format similar to that of the 5MHz beacons, GB3RAL/WES and ORK, execpt that the sounder sequence
I have now increased the power of this beacon to 10 Watts. It uses a clone of the PA designed for GB3ORK (described in RadComic last year) based around an MRF137 operating in class AB1. As this is th
For a low power signal into a small antenna I've had several good reports on this 1.96MHz beacon. From D, ON, HB and all around the UK. Never realy looked at topband before (or perhaps it should be r
Ahh.. Great thanks, I can go back and explain to a couple of worried persons that it wasn't a mass produced item. Its a high frequency for a standard crystal. All teh units I've seen and enquired abo
'pologies for non-related post, but hopfully someone here may know... Please, can anyone shed any light on why a TTL type crystal oscillator module should, at one time, have been available from Digik
A soak-test has just started on the final version of the MF beacon for a project later in the year. As before this transmission has a similar sequence to GB3RAL/WES/ORK with the sounder period replac
Oops, the penultimate sentence should have read Frequency 1.960MHz Andy G4JNT -- Original Message -- From: "Andy Talbot" <[email protected]> To: "LF Group" <[email protected]>; "John,
