[time-nuts] OT favorite signal generator?

Lux, James P james.p.lux at jpl.nasa.gov
Fri Jun 19 10:10:57 EDT 2009


How accurate?
What frequency range?
What spectral performance (harmonics, spurs)?

One thing to watch out for on testing with very low level signals is leakage out of the signal generator and into the unit under test via a path other than the coax. When we test deep space transponders at work at very low levels (-160dBm), we actually use a signal generator at a different frequency and multiply it up externally (partly that's also because historically, the signal generator didn't go high enough (7.15 GHz).. But when you use a modern signal gen that does work at 7GHz, you've got to be more careful).
.. In any event, it doesn't take much to turn your careful and precise -160 into -159 or -161.


On 6/19/09 5:04 AM, "Patrick" <optomatic at rogers.com> wrote:

Hey everyone

Sorry for the off topic post. I have received great advice in the past
with items for my little shop and I can't resist to ask again.

I am thinking about buying a signal generator. I suspect that I will
mostly use it to inject low uV/mV signals into the amplification stages
of the laboratory instruments I service.

Any feedback you have would be greatly appreciated-Patrick

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