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8560e spectrum analyzer ERR 335 356

Question asked by amirabz on Dec 17, 2018
Latest reply on Jan 8, 2019 by ScottLP
  • Comment • 1

I have 8560ec spectrum analyzer (30KHz to 2.9GHz). I am getting two errors:

1- ERR 335 SMP UNLK

2- ERR 356 SPAC CAL

Also I noticed when the spectrum analyzer doesn't work properly immediately after turning on. For example, when I turn on the spectrum analyzer and connecting the reference signal (300MHz -10dB), for almost 5 minutes SA doesn't show any signal. After 5 minutes the reference signal gradually appears on the screen (with wrong amplitude -17dB) and then after 10 minutes it almost shows an acceptable amplitude for the reference signal (-10.5dB)

 

any help?

ScottLP
ScottLP Employee Jan 8, 2019 9:26 AM
Correct Answer

Hi amirabz,

To learn more about those errors you are experiencing, I recommend taking a look at the service guide for your instrument.

The first error is described here, on page 310:

The second error, on page 311:

That IF calibration which occurs every 5 minutes does match with what you were saying about the on-screen signal.

There is information starting on page 511 (In the "Synthesizer Section") about troubleshooting an unlocked PLL. I recommend reading this section and following the instructions to help narrow down the issue.

 

Note that Extended Service Period calibration and repair is available for the 8560E (as of this post). You may send in your instrument for repair by our expert technicians for as long as this offer stands.

 

Hope this helps.

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