[Repeater-Builder] Re: Dupelxer wierdness

2006-02-08 Thread Dave VanHorn
I'll take most of what you said as being sarcastic, but your point is taken. I guess so, just pointing out the apparent absurdity. If so, great, you're done. If not, fix it. In the end though, the function of the pass adjustments is simply to transfer energy at the pass frequency with

[Repeater-Builder] Re: Dupelxer wierdness

2006-02-07 Thread Dave VanHorn
I also have a big difference between the bird and the service monitor. Since the service monitor goes in for periodic calibration, I always assumed it was correct over the bird readings. I would consider this a big alarm bell.. Yahoo! Groups Links * To visit your group on the

[Repeater-Builder] Re: Dupelxer wierdness

2006-02-07 Thread Dave VanHorn
Don't tune pass or pass/reject cavities with a tracking generator and spectrum analyzer which shows only insertion loss. Don't. Don't. Don't. You need to look at return loss. Search the archives - this issue has come up and beaten down on more than one occasion... So you can't tune them

RE: [Repeater-Builder] Re: Dupelxer wierdness

2006-02-07 Thread Jeff DePolo WN3A
If I take all the opinions I've seen in the last month as fact, then the pass adjustments on duplexers can't be tuned. I'll take most of what you said as being sarcastic, but your point is taken. If tuned with a quality network analyzer, or with a return loss bridge and high return loss