That's the absolute maximum safe input.
10dBm is about normal for that age of analyzer, but they're not usually usable up to that, the figure to look for is the input level for 1dB compression. Above that, the analyzer wil start generating significant spurii of its own. As a rule of thumb, put another 10dB attenuation in, if everything drops by 10dB, what you see is what you've got. Anything that drops by more than 10dB is probably an artifact of the instrument.I think it must go back to what devices were available at that time; my
8558B specifies no more than +30dBm.Pete
10dBmyou might be better of using a modern SMD dual schottky diode, better match, lower capacitance etc. You will have to devise some neat way of fitting them in. Circuit is in series config so try HSMS-2814, or 2 in one package HSMS-2815. Try Farnell or Newark? for these parts.Yes the service manual says you need a matched pair of
1902-0385. I suspect a pair of 5082-2835 would do OK also.Eric F. Richards wrote:
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