I think I am suffering 440 Mhz IF interference in my BA II system. Can I install a band pass filter to stop it?
A. On BA II xx-A/E units, there are 3 signals present 440 Mhz IF, 20 Mhz, and 12 VDC. We do not recommend using any type of filtering on the IF. To eliminate IF interference, use 50 ohm solid sheath cabling, which provides the highest level of protection. If the interference level is extremely high, and the interference cannot be eliminated, then moving to another site may be considered. Q. I have installed our BreezeACCESS II AU-E-BS-2.4 in a site with a lot of 2-way radio and 900 Mhz cellular also installed in the site. Performance is poor, and Id like to know how I might find out if I have 440-MHz I.F. interference. A. Intermediate Frequency interference is very hard to detect with data running over the system. The best method of testing is as follows: Disconnect the IDU and ODU from the IF cable. Install a 50-ohm precision termination on the IF cable at the ODU. Using a spectrum analyzer capable of 100dBm sensitivity at 440 Mhz, measure the energy received through the cable between
