I tested my unit in a similar way to what Justin has described, I used a swept source and put the SA124B on max hold and let it build up a picture. If it is cracked/open circuit input pin you will see an increasing signal level with frequency. Foltronics in Holland did a great job quickly fixing my unit and it is already back with me – thanks guys! 🙂

Sounds like a problem I just had, which I think is down to the input connector centre pin. I applied a bit of sideways pressure and the signal shot off. Sent it off to my local retailer for repair last week and waiting for some feedback.

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