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About Explorer transmit levels.

A

Anonymous

Guest
The Explorer design is based on a fixed transmit power, and the user adjustments only relate to receiver sensitivity and response characteristics.
Cody should continue to post here, nothing I or any of the many emails I received leading up to the events of the last few days EVER said anything about that.
DAS
 
DAS
There is one user input that affects the transmit signal. Noise cancel(either auto or manual) causes the transmitted signals frequency to be slightly shifted as it cycles through the channels.
As you say Transmit power is fixed. Sensitivity adjustments are made on the receive side.
 
The power switch!
<img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol">
DAS
 
Being a semi PI unit, all the frequencies are TXed all the time. The receive circuit just chooses which ones are processed when channels are adjusted. My 2 cents.
 
Chris was just try to get my goat, but he IS correct the user does have a smidgen of control over the transmit circuit, even though my post was entitled "Transmit Levels".
Yes, the noise channels are ever so slightly different in frequency, but all 27 of these transmit frequencies are moved by the same small amount in the hopes of finding a channel free from external interferrence. Inteference with the receive circuits that is, as you point out.
Paraphrased, you select a set of transmit frequencies which represent those with the least receiver interference.
DAS
 
mayumi1,
A few people have posted o'scope traces of the transmit signal. The period of the square wave changes as the machine cycles through the noise cancel. Otherwise you would be talking about some pretty tight variable bandpass filters on the receive side.
Chris
 
then when the tx signals change, wont the stray rf still be recieved? I wont argue with o'scope results. They would be the most accurate, however, I cant imagine (pardon the analogy) changing the pitch of your voice when its actually your wife doing the singing.
HH,
bing
 
are affected by changing the noise channel whether manually or automatically.
As you correctly state, it makes no sense to move the transmit frequency without an exact corresponding change to the transmitter.
In fact they both "slave" of of the same master frequency generation circuit.
In other words, it's the floor wax that's also a desert topping! (Extra points for those who can name the source of that little reference!)
DAS
 
OBVIOUSLY meant to say "exact corresponging change to the RECEIVER".
Man, I ordered a new set of typing fingers, can't wait till they get here. <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt=":)">
DAS
 
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