[time-nuts] OT favorite signal generator?
cfharris at erols.com
Fri Jun 19 11:48:35 EDT 2009
Robert Darlington wrote:
> As John Miles said, no HP signal generator should produce a distorted output
> at low level. My Tektronix does!
It depends on how they lower the signal level. If the signal level is
lowered using a traditional attenuator, the distortion will be unchanged,
but if the signal level is lowered by biasing a pin diode attenuator, or
by changing the bias on a gain stage, it will change the distortion all
over the place.
Basically, if there is a pot to adjust the signal level, you can
expect the distortion to change too. If there is a selector switch
like mechanism, the distortion will probably not be affected.
More information about the time-nuts