| Electronics > Repair |
| Rohde & Schwarz SMIQ03B with Error 110 Output unleveled; IQMOD: ALC failure |
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| Qw3rtzuiop:
--- Quote from: Jarek on November 15, 2023, 01:53:22 pm ---What kind of transistor is it? Does anyone have a diagram of this version of IQ Modulator? --- End quote --- Take a look here: http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Rohde_Schwarz/Rohde_Schwarz_SMIQ |
| Jarek:
Thank you for the offer Drhex. I've already bought it. Regards |
| Jarek:
ERROR: VECTOR_MOD and LEVEL_ATT calibrations fail with 'Reference voltage oot (6.9 ... 12V) Which reference voltage exactly is it? |
| lcharman:
Hi All and Jarek I seem to have the same problem as yours. Error occurs while calibration. My Post is here https://www.eevblog.com/forum/repair/rohde-schwarz-smiq03b-with-error-313-error-180-calibration-failed-and-erro183/msg5546891/#msg5546891 I replaced the SHF0186 V103. Its drain voltage is changed from 0.64V to 6.7V. I have no idea what is the reference voltage 6, 9, 12V. I check the manual and find any point may relate to the reference voltage. It may be below 1. X240.A2 UREFAM 0-12V (AM Command Value) 2. TP2121 D_IQCAL 0-12.5V (Cal detector IQ Modulator) 3. TP2120 D_PHI 3.5-13V (Control Voltage phase shifter ) 4. TP2014 D_TUN2G4 3-18V (Tuning voltage 2.4GHz VCO) it is the priority of my troubleshooting. Could you share the idea of yours? Thanks! ;D |
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