(ssb), used for voice communications on the short-wave bands. on any scanner, you will hear local ham operators using repeaters in the frequency range of 144 to 148 mhz. most important: talk to a ham! we love to talk about experiences in amateur radio and are known for being "elmers"...
The iris is a visible but protected structure, and it does not usually change over time, making it ideal for biometric identification. Most of the time, people's eyes also remain unchanged after eye surgery, and blind people can use iris scanners as long as their eyes have irises. Eyeglass...
What will be the problem when AM is over modulated? If over-modulation does occurthe carrier is chopped up and the modulation no longer resembles its modulating signal. At the receiving end the signal will be very distorted and unreadable - but more important, the over-modulated signal will h...
It's also possible to act as a manual DNS server by yourself. Just use the ping or traceroute service on a non censoring machine to get the IP of your desired server. Then use the IP instead of the URL in your browser. You will always get an IP, but it won't work every time ...
The keyer does also have an internal mini straight key. I find this idea very nice, to avoid extra cables. It is not the most convenient key in the world, but it is there along with the transmitter every time you need it. By using a special panel switch from apem, I was able to ...
General "Buck" Turgidson: As you may recall, sir, one of the provisions of Plan 'R' provides that once the go-code is received, the normal SSB Radios in the aircraft are switched into a special coded device which I believe is designated as CRM-114. Now, in order to prevent the enem...
What Is A Marine EPIRB & How Does It Work? The EPIRB system, or Electronic Position Indicating Radio Beacon system to give it its full name, is a sub-system of theGlobal Maritime Distress and Safety System (GMDSS). There are two types of beacons:~ ...
What must be taken into consideration is the fact that the frequency displayed on the radio's digital display is thecarrierfrequency. A suppressed-carrier single-sideband signal is considered to be 3 KHz wide. So, for an USB signal to be confined to the 20 Meter Amateur band, the frequency...
A large crab boat needs to be able to stay at sea for months at a time while carrying its crew, everything the crew needs to survive, and all of the crabs the
编码器信号处理模块中的一段程序如下。其中，QuadA、QuadB分别为2500PPR增量式编码器的A、B信号，counter初始值为200。那么，电机转动90°后，counter的值为（ ）。 always@(clk) beginif(QuadA!=QuadAprev|| QuadB!=QuadBprev)counter<= counter +1;QuadAprev<= QuadA; ...