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Advantest R3477 9kHz to 13GHz spectrum analyzer
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nctnico:
Today I got round to (somewhat) checking the response on my R3477 to see if it has the same inconsistancies as dschiedsch showed. I tried one of the cheap ADF4530 generators but it seems I have received a defective one. So I resurrected an ADF4351 frequeny generator / sweep board I made a couple of years ago. The ADF4351 can generate frequencies up to 4.4GHz and I think my R3477 behaves OK since it doesn't have the sharp step around 3.2GHz. The second graph shows the output from 10MHz to 15GHz in order to give an idea about the amount of harmonics the ADF4351 spits out.
dschiedsch:
Hi
I started working on the a1freq file and indeed it does what I thought it would.
Its a calibration file for the frequency band.
the format is as follows:

frequency, mode of YTF, 5x 0db attenuation correction, 5x 5db attenuation correction, ..., 5x 55dB att correction, 6x 60dB and up correction
its a total of 66 correction factors but only 13 are unique. there are 12 sets of 5 and one set of 6

so now since I know what the values are for I can try recalibrating with a known source. Luckily I know someone from university ...
videobruce:
Three questions:
1. How heavy is this?
2. What is the power consumption (watts)??
3. If the unit is powered on, can you change the battery w/o loosing calibration??
dschiedsch:
Im Not at Home for the next four weeks. However
The calib Data is on a cf Card so there is No Problem with a battery.
On the question of how Heavy it is i would have to Check  but there is a datasheet online so please Look it up.
nctnico:

--- Quote from: videobruce on October 20, 2016, 03:51:53 am ---Three questions:
1. How heavy is this?
2. What is the power consumption (watts)??
3. If the unit is powered on, can you change the battery w/o loosing calibration??

--- End quote ---
You can find the weight and power consumption in the manual you can download from here: https://www.advantest.com/service-support/electronic-measuring-instruments/operating-manual-of-discontinued-products
The calibration is stored on the hard drive which is a standard compact flash card. I have made a (working) backup of the CF card in my R3477. It is a PC so changing the battery only affects the BIOS but the standard settings work just fine.
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