For a normal pass/reject duplexer, you would need
something to view the signal (service monitor or
spectrum analyzer) and something to provide a signal
(separate signal generator or a tracking generator
built into the service monitor or spectrum analyzer).
Additional items that could come in handy: a pair of
6-10dB coaxial attenuators to go between the equipment
and the duplexer, a good 50 ohm dummy load, several
good jumper cables (RG142 or RG214), and any necessary
adapters. A return loss bridge, or the equivalent
capabilities in a service monitor, will make tuning
the passband a lot more precise.
Some people also use a pair of radios and a wattmeter.
Tune the passband for least reflected power on the
transmit frequency, tune the notches for mimimal
signal (at the receive frequency) at the receiver.
Then swap TX and RX ports and repeat on the other
frequencies.
The internal filter/duplexer on a UHF MSF5000 can be
tuned with the same equipment, but it goes faster and
more precise if an RF milli-voltmeter is available.
I've done these both ways, and while more equipment is
required to do it "by the book", the results are
better.
Bob M.
======
--- Ronny Julian <[EMAIL PROTECTED]> wrote:
> What equipment is needed to tune a duplexer? A
> service monitor and a
> signal generator? Or is there something else?
>
> Thanks!
> K4RJJ Ronny
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