Dear Treggers, There have been very few messages posted in the last month or so, is this a result of vacation time or is this network losing its purpose? For example Vic has been singularly quiet of late. I have been asked a question which is beyond my capacity so ask for comments. "Currently, I am working on a project which requires me to measure the amount of spurious signal from a transmitting radar falling into the receiving band of a receiver (C band). The receiver is not yet being installed, so I have connected a horn antenna to a spectrum analyzer to act as the receiver.
The location of the measurement is on a remote island, so chances of interfering sources nearby is very slim. The spectrum analyzer, HP8593E, resolution bandwidth is set to 5MHz (this is to simulate the IF bandwidth of my future receiver) with video bandwidth of 3MHz. But from the ambient measurement, it appear that the signal level is around -62dBm which is clearly not acceptable. But in order to simulate the spectrum analyzer as the receiver, its resolution bandwidth would have to be equal or higher than the IF bandwidth of my receiver. Could it be possible that the spectrum analyzer resolution bandwidth is too wide resulting the noise floor being raised instead. If that is so, what should be the appropriate resolution and video bandwidth ? If not, what could be the reason for the high signal level of -62dBm?" Regards, R Medding R MEDDING & ASSOCIATES Ph: +61 3 95328848 FAX: +61 3 95328849 www.meddingassoc.com.au
