Hi
Dependant on the typr of filtering used .The standard
is either a cavity or a 2nd harmonic filter which is
very small in size.1" by 1 " .
Regards
Brad ZS5WT
--- skipp025 <[EMAIL PROTECTED]> wrote:
> The obvious answer would be the amount of
> energy coupled to the two-loop bp cavity
> output port should be minimal at the second
> harmonic.
>
> A lot of people assume the isolator/circulator
> is an automatic serious level 2nd Harmonic
> generator. I've not found that to be the case.
>
> Places to be carefull: When using notch-pass
> duplexing and some of the newer style combiners
> where notching is the dominant portion of the
> system and preselection and/or bandpass filters
> are/is less applied.
>
> ****
>
> I have three different brand Trunking Combiners
> side by side: Telewave (qty of 2), Cellwave (qty
> of 2) & Wacom (qty of 1). All are unmodified
> original as-built combiner units.
>
> Not a low pass filter in the bunch plus they
> are all full duplex combiners (receive and
> transmit on the same antenna). Same with both
> the original Microwave Associates and Antenna
> Specialist units in the next room.
>
> So the answer in my mind is yes I would trust
> a trailing passband cavity (properly configured)
> to do the job. So does/did the above named
> companies*.
>
> cheers
> skipp
>
> *rip wacom
>
> > "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> > I trust that if there is no Low-Pass filter
> > at the isolator output, a passband cavity
> > would do the job?
> > LJ
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
> [EMAIL PROTECTED]
>
>
>
>
>
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