![]() ![]() The dummy load loss for this dummy load, Pl, is 7.8 Db. The 50 ohm generator output will need to be to 55 uV, so the tuner sees 40 dBf. Reference pages 11-12 for the dummy antennas. To correlate to the 50 ohm dBf chart I just posted - let's look at the 40 dBf line (page 15) for a 75 ohm dummy antenna (7),(8) shown in (column1). gives Charts of available power, but remember - these are what you will see at the tuner AFTER the dummy antenna, and includes the resistor loss. explains the "input levels" with reference to important terms used later - open circuit voltage Eo (no load), and dummy antenna antenna loss Pl. It gets a little confusing, as the figures being referenced are below the figure caption line for (1) and (2), but then above the caption line for (3) - (7), then below again for (8). They go one step further, however, and include setups using 2 generators, required for some of the tests in this standard. Pages 11-12 shows dummy antenna setups, using resistors to convert from 50 ohm outputs to either 75 or 300 ohms. The complete set of files for this standard is here in files. ![]() At the risk of confusing people further, including me, I'll post the "clear as mud" relevant pages from the IEEE-1975 standard on this topic. ![]()
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