thanks very muchfor the information
i do have a spectrum analyzer hp8558b and a wavetec 3000 servicemonitor
thanks ian
- Original Message -
From: "Eric Lemmon" <[EMAIL PROTECTED]>
To:
Sent: Friday, November 28, 2003 1:25 PM
Subject: Re: [Repeater-Builder] Tuning cavity filters
> Ian,
>
> Of the two methods you propose, the first is better by a long shot. It
> is never a good idea to transmit into an untuned duplexer, for any
> purpose.
>
> If you don't have access to proper duplexer tuning equipment, such as a
> network analyzer or a spectrum analyzer with tracking generator, the
> "receiver s-meter" method is crude but will get you close. The down
> side is that this method lacks the great sensitivity and precision
> attainable with a network analyzer- the instrument of choice with
> duplexer manufacturers.
>
> Perhaps the best advice I can offer is to contact the manufacturer of
> your duplexer, and ask for a copy of the field tuning instructions.
> There is no "single standard procedure" for tuning duplexers, so it
> helps to know what method is recommended by the firm that built it.
>
> 73, Eric Lemmon WB6FLY
>
> Ian Wells wrote:
> ...When tuning cavity filters, which is the best way of alignment-
> having a signal generator hooked up to the tin with a radio with signal
> strength meter on the other side, or transmitting on the radio with an
> swr meter in line with tin into a dummy load?...
>
>
>
>
>
>
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>
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