Re: Help with HP 8657B Signal Generator
¿ªÔÆÌåÓýBob, Beware of a number of factors in doing what you're trying to do.? 1) As others have mentioned you will not actually get a smooth sweep. You are getting frequency as a step function with settling time in between steps. The settling time between steps can be quite significant and can introduce quite a few artifacts that will dramatically impact your measurements.? 2) Not only will the step function settling time impact the frequency output but the power as well. Sweepers are designed to keep a constant output amplitude while sweeping across the chosen range. A really good one will even let you choose between unlevelled, internal leveling, and using an external power sensor to level the output. The last lets you remove the attenuation curve of the cable and other bits between the sweeper and the DUT.? You get what you pay for in an HPIB to USB adapter. The low-cost adapters quite frequently simply do not work and/or do not have the same command that as the more professional ones.? When you use an actual sweep generator, you can frequently get a voltage which is proportional to frequency out of the back of the instrument. This can be used to coordinate your sweep with other instruments. In fact, if you have as an RF power sensor, a sweep generator, and an oscilloscope, you can build a simple network analyzer that can be used to tune those bandpass filters.? On Sep 25, 2015, at 22:40, Bob Albert bob91343@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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