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E4404B 1DR Function Question

Question asked by bigred on Jun 16, 2014
Latest reply on Jun 20, 2014 by MikeM

I've got an E4404B spectrum analyzer with a valid Option 1DR keycode. But the lowest RBW that the analyzer will accept is 1-kHz, won't go below that. The video bandwidth also will not go below the non-1DR limit; it acts like the option isn't there. (The unit does not have Option 1D5, High Stability Timebase option, by the way.) I should also point out that the on-board memory/clock battery/crystal appears to be dead. Anyhow, am I doing something wrong? Is the analyzer missing some internal hardware (very possible) or might it have a serious issue? Thoughts?

Thanks much!