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| Advantest R3477 9kHz to 13GHz spectrum analyzer |
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| nctnico:
Mine also shows numbers in that menu. Unfortunately I don't have the means to test at over 3GHz. I do have an ADF4350 board somewhere but I doubt that will be any good to check a difference of a few dB over a (relatively) wide frequency span. |
| dschiedsch:
Yes you're probably right. I'm only lucky that I can use some equipment at work which I know is calibrated well. I only used the analyzer below 3gig for a few months and didn't see any issues. Only to find out it was off when I measured a 5.8ghz video transmitter. So next thing would be to find a calibration manual. Because changing values in the service menu and looking what happens is probably too painfully slow :-) Any ideas where I might get this? |
| suj:
Hi guys. For some time i have Advantest R3681 32 GHz Signal/Spectrum Analyzer with integrated 6 Ghz generator. I suppose that this is the common platform with R3477 (Windows XP Embedded, touch scren, similar performance). And finally, the password for the service menu is the same - thank you guys :-+. I don't have the calibration instructions, but the search base is expanding now. Each instruction (R3477, R3671, R3681) will be useful - service menu looks identical. |
| dschiedsch:
Hi The a1freq.csv file (changed filetype to .txt for attachement) in the Advantest\R3477\Fact_cal folder seems to hold the calibration values over the whole band. It gets loaded at boot (I moved it to a different folder and the analyzer throws an error) and I think this is where I want to change values so the dB values in the high band are correct. Now the question is which column is what Obviously the first is frequency and I would guess the second is the harmonics mode (aka if it's in base band or using one of the YTF modes H1,H2,H4) The values after that I guess are correction values in dB. The question is now what the different columns are for different RBW settings maybe? If anybody can make a better educated guess then please enlighten me. |
| nctnico:
You could try and change a few values with extreme numbers (+6 or -6) and see what happens. |
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