When the sleeve pops off, you just use vinyl tape to keep it on.  Lots of tape.

From: That One Guy /sarcasm 
Sent: Wednesday, February 03, 2016 12:03 PM
To: [email protected] 
Subject: Re: [AFMUG] weird problem

tighten it til the sleeve pops off, cuss, put a new end on and tighten it just 
a little less. 

There is probably a torque rating

On Wed, Feb 3, 2016 at 12:41 PM, Chuck McCown <[email protected]> wrote:

  Compressing the rubber gasket.  

  From: Ken Hohhof 
  Sent: Wednesday, February 03, 2016 11:38 AM
  To: [email protected] 
  Subject: Re: [AFMUG] weird problem

  How tight is “fully tight”?

  I was taught hand tightened or equivalent, rather than put a wrench on it and 
crank it until it bottoms out.  Is that wrong?  SMA connectors seem to have a 
more pronounced stop when they’re tight.


  From: Chuck McCown 
  Sent: Wednesday, February 03, 2016 12:35 PM
  To: [email protected] 
  Subject: Re: [AFMUG] weird problem

  Yeah, it is interesting to watch a N connector on a network analyzer set for 
return loss/VSWR/reflection coefficient.
  It gets better with every turn and keeps on improving right up to the last 
bit of movement.  Anything less than fully tight is causing a problem.  

  From: Sean Heskett 
  Sent: Wednesday, February 03, 2016 11:30 AM
  To: [email protected] 
  Subject: Re: [AFMUG] weird problem

  3/4 of a turn on an N connector is a lot.  You were probably loosing a lot of 
RF out that port. 


  On Wednesday, February 3, 2016, Dan Petermann <[email protected]> wrote:

    We have two 11GHz links on the same freqs. One V and one H pol. These are 
dual links, 2 - 40Mhz channels. The radios are Dragonwave, one Quantum and the 
other a Horizion Duo.

    We had to replace the IDU of the Quantum with a DUO and put the link into 
DUO compatibility mode.

    After replacing the IDU, we started having issues on the other link. The RX 
levels of one freq dropped by 9dBm, the equalizer stress jumped to 150 (should 
be under 100), and the link would only run at 32QAM.

    This morning I moved the IDU up 1 RU (it was sitting directly onto of the 
other IDU) and tightened the coax by 3/4 of a turn. Gained 9dB, lowered 
equalizer stress by 50, and now running at 256QAM.

    I check the IF freqs and they were separated by 200MHz.

    I’m curious, does anyone have an idea why this happened?




-- 

If you only see yourself as part of the team but you don't see your team as 
part of yourself you have already failed as part of the team.

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