First you'll need a return loss bridge. No replacing that. The 11807 software can make things a little prettier, but you can still do return loss quite easily. Distance to fault is going to be a bit more challenge, but it can be done too.
Return loss is the easiest to set up. You'll need to set up the tracking generator/spectrum analyzer for the range you want to measure. Use the Duplex Output and connect it to the Source port on the RLB. Use the Antenna Input and connect it to the Reflected port on the RLB. You optionally may want to put a 6dB pad in between the Duplex Out and RLB Source port. With the DUT port open on the RLB, you should have a trace on the spectrum analyzer over the range you are sweeping. Now, you can turn up the output power of the Duplex Port until the trace gets close to the reference level at the top, or go into the menus on the spectrum analyzer and do a Save A and then a A-B to null out the sweep. Now, when you put a good load on the DUT port, you should get a return loss down ~40dB or so. Hook up the DUT you want to sweep and go. Yes, this is quick and dirty, but it gets the job done when you are not looking for fractions of a dB... Lee --- In Repeater-Builder@yahoogroups.com, "Dickson" <dicksonf...@...> wrote: > > Hi all, > > Without the RF Tools provided by 11807E opt 100 on HP 8924C, how to measure > return loss and cable fault? > > The 11807E opt 100 provides the IBASIC program that can show the return loss > profile over the range of frequency and indicates the max/min return loss and > the corresponding frequency. > > Thanks and Regards, > Dickson Fu > VR2WHF >
