F6700 measurement

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  • Question
  • Updated 5 years ago
  • Answered
Have some body measure:
1. real CW delay- from key down to RF output ?
2. Noise level on Line Out in compare with others RX, ex: F5000 ?
with SSDR 0.13.10
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Sergey, R5AU

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Posted 5 years ago

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Photo of Steve - N5AC

Steve - N5AC, VP Engineering / CTO

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Official Response
RCA TX1, TX2 and TX3 are PTT outputs that may be delayed from the time that the PTT in the radio is depressed. They require pull-ups to operate (they are open collector outputs). TX_Delay says how long from PTT until it is OK to send RF out from the antenna port. If your amplifier takes 15ms to key, you should set this to 15, for example. TX_timeout is just a cutoff in minutes to prevent an accidental mic depress from keeping the radio transmitting for hours. The TX_REQ inputs on the back of the radio is another way to do the same thing -- if you enable them, you can have the radio not product RF output until these are asserted after a PTT