Re: VHF MTR2000 Poor Receive Performance
|
Measure test cable losses by replacing the tee with a female-female barrel, then correct your insertion loss measurements based on that value when you¡¯re adjusting the coupling with the tee connected to the cavity and test cables. ? 0.35 dB is pretty light.? You¡¯d basically end up with notch cavities with little in the way of a bandpass characteristic at such light coupling (i.e. less out-of-band rejection, less mid-band rejection).? 0.5 to 0.6 dB per cavity should yield a good balance and still net you 100+ dB of notch depth. ? ??????????????????????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Jared Smudde
Sent: Sunday, October 30, 2022 7:54 PM
To: [email protected]
Subject: Re: [repeater-builder] VHF MTR2000 Poor Receive Performance? I appreciate the write up Jeff! I¡¯ll tune them up based on this and see if anything changes.
I know I have each cavity currently set to 0.35db IL.
I have an Amphenol Tee connector I¡¯m using. Now, do I need to normalize the SA cables with the Tee connector in line before measuring? That¡¯s what I¡¯ve been doing when messing with this.
|
