Products > Test Equipment
Agilent E8357A
Forzaman:
--- Quote from: joeqsmith on November 09, 2022, 01:43:41 pm ---I have to purchase or rent equipment to align it. I did...
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I didn't perform any alignment yet. Those cal files were on the unit when I received it (file dates are 2009). I only performed a PNA operator's test, which everything passed. I can look at the Receiver display.
The service manual indicates that only the A and B receivers are adjusted during the receiver alignment. Therefore it would make sense that there are only two sets of data.
joeqsmith:
--- Quote from: Forzaman on November 09, 2022, 05:46:52 pm ---I didn't perform any alignment yet. Those ..
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I figured that when I saw the 6GHz upper range in your table. Now that Miek has sorted out the format, there's no need to supply your cal files after alignment.
Notice how your files also have repeat measurement points at the same locations. I think that's the last remaining question... Well,, maybe...
Forzaman:
--- Quote from: joeqsmith on November 09, 2022, 05:22:30 pm ---One odd thing I noticed, when I had the PNA create the two files if you look at the frequency table, both list 40MHz twice. Any idea what is going on here? Is this the point where they switch sensors?
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Replicates are also at 10M, 748M, 1.5G, 3G, 4.5G, 6G, 6.5G & 7.75G. So something else is going on.
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I recall Caesar mentioning in another forum that measurement points are taken at the beginning and end of each band with only a 1Hz separation between the end of one band and the start of the next.
joeqsmith:
Nice catch. Indeed, I needed to increase the display precision. (9999999, 10000000).
caesarv:
The main purpose of the mxcal files is to provide a simple default calibration. This way, if you make an S11 measurement and place a short/open on the port, it will show a line at 0dB. Likewise, if you measure S21 of a short thru-cable, the trace should also be near 0dB. These files are somewhat bypassed if you perform a user calibration beforehand. So even if there are no files, you can still make an accurate measurement by performing a user cal. You need to perform the Receiver Adjustment in order to generate a real correction for your particular instrument. This requires a power sensor or two that covers the entire frequency range.
For the E835xA series, the corrections do not vary all that much from unit to unit, so you can use the corrections from one unit on another. It will not be really accurate, but it will suffice in most cases. I have zipped my E8358A files and have included them here.
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