Preserving signal quality in measurement applications using off-the-shelf data acquisition equipment–for signal bandwidths up to 1 MHz and sampling rates up to a few million per second–can be ...

Is there a way to interrogate a SFP in a Cisco switch (2950, 3750, etc) in order to glean info about fiber quality? Noise, signal loss.. my company is too cheap to buy a real fiber tester.