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Anritsu FAQs

The ML243xA power meter is giving a "cannot identify" or "cal at 0 dBm invalid" message with the MA248xD power sensor. Is there a problem with the power meter?
No, the ML243xA Power Meter needs to have firmware revision 3.10 or greater loaded when using the MA248xD sensor.  The latest firmware can be downloaded from the Anritsu website at: