You can use a sweep generator and scope for swept alignment of filters and duplexers. The manual for your sweeper should show the setup & procedure.
If you don't have the manual, try BAMA or other internet sites. You will need an RF detector probe or preferably a detector such as the HP 423A or 423B crystal detectors. These have a 50 ohm interface to the device you are tuning and provide a rectified output to drive the vertical deflection of your scope. The scope horizontal is driven by a ramp voltage from the sweeper. Using the scope in X-Y display mode thereby provides a display of device response versus frequency. Be aware that your display will be linear whereas a spectrum analyzer + tracking generator display - or a network analyzer display - will look like the duplexer manufacturer's spec sheet with a logarithmic vertical axis. You gan also tune the duplexer using the generator in the IFR along with a receiver that has a receive signal level indication - even your repeater's receiver and a test meter showing the limiter. ----------------------------------------------------------------- --- In [email protected], "w6nct" <[EMAIL PROTECTED]> wrote: "... For some reason, I thought that my father used to tune up resonant cavities using a sweep generator, oscilloscope, and a frequency counter; but I don't recall the exact setup he used. I inherited his Wavetek (Model #1080, 1GHz) sweep generator, oscilloscope, and frequency counter. I also have access to an IFR- 1100 service monitor, if I need it (i.e., can be borrowed from a friend). Can I tune up my 70cm duplexer cavities using the equipment I have? .."
