Tim: >> Surely it wouldn't be specified in "dBm"? >> >> 0 dBm is 1 milliwatt into 600 ohms. Is the antenna really 600 ohms? >> That would be an unusual antenna impedance. les: > 600 ohms is usually an audio reference. i.e. 0dbm is 1mw on 600ohms. > RF is usually specified to 50 ohms regardless of the actual impedance > (0dbm rf is 1mw on 50ohms), and a transformation is needed to arrive at > the voltage, current losses for other impedances. Some VHF specs are at > 150 or 300 ohms, and there could be a new standard developing for 600 as > some patch antennas do have that high an input impedance. It's still actually called "dBm" and not db+(something else)? Surprising! We were always taught that 0 dBm meant 1 mW into 600 Ohms, i.e. a power and impedance, not just 1 mW into anything. -- [tim@localhost ~]$ uname -r 2.6.27.25-78.2.56.fc9.i686 Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
