Oscilloscope and Spectrum Analyzer Trigger

[staticshock]

I have an RF instrument that has 3 outputs of 10MHz and 4 outputs of 500MHz. The instrument doesn't need an input to output the signals, but it does take a 10MHz input as a reference signal so the output signals are phase locked.  The outputs are connected to signal generators (500MHz) and spectrum analyzers (10MHz) and all are in good working condition. My system was intermittently failing and it was determined that the RF instrument was the issue. I took this bad RF instrument and installed it in another system. It was performing just fine, but overnight when I returned the signal generators and spectrum analyzers connected to the outputs of the RF instrument had failed self tests. This proved that the RF instrument was bad. I've been looking at the outputs of the RF instrument on an oscilloscope and spectrum analyzer, but I don't see anything that looks out of place. The 10MHz signal does have a bit of distortion, see attached image, not entirely sure if it is the cause of failure. I'm not sure how to find a solution with proof that there is something wrong with the RF instrument. I've wondered if the signals ever dropout or if there's a spike somewhere. I don't know how to setup a trigger (and what type of trigger) to capture it on the oscilloscope or on the spectrum analyzer.

[CaptDon]

What is the 'R.F. Instrument', you haven't specified. Your 'system' was failing, what does your system consist of? What will cause a failure on your 'system'? One cycle missing from any of the references? Lost phase lock? Lots of jitter? Maybe paint a better picture of what your system does or what you do with it.

[staticshock]

The RF Instrument is just a reference distribution chassis. Just like I mentioned, all it does is receives a 10MHz sine wave reference signal and distributes reference signals (10MHz) to 2 spectrum analyzers and (500MHz) to 3 signal generators. I would say the system doesn't need attention because I know that the spectrum analyzers and signal generators are in good working order. The help I need is I'm not sure of how to determine the reference distribution chassis is bad either by using an oscilloscope or spectrum analyzer to capture some kind of data.