| Electronics > Repair |
| Rohde & Schwarz SMIQ03B with Error 110 Output unleveled; IQMOD: ALC failure |
| << < (4/12) > >> |
| jgorsk:
I also have a faulty SMIQ with the 110 error (Output unleveled; IQMOD: ALC failure) but the output stage amplifier seems to be working. I suspect some filters between the frequency divider and tha output amplifier stage. Attached are the spectra of the -10dB signal at 450MHz and 460MHz. The amount of harmonic tones at 460Mhz (and above) is way higher than specified in the SMIQ documentation. Could someone do me a favour and post the spectra of their SMIQ generator at -10dB and 450 and 460MHz please? I'd like to see how those signals look like on a working generator. |
| rastro:
Hello jgorsk, Which model of SMIQ do have (3,4,6??). It will probably make a difference. The 4/6 go through an additional PCB. -rastro |
| jgorsk:
It's the SMIQ 02 model |
| rastro:
I've included the spectra for an SMIQ06 set to 450MHz and 460Mhz. I don't know if this will help since it has additional RF paths. - rastro |
| jgorsk:
Thank you very much, that's what I needed to see. |
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