1. Preamp Calibration: We are being quoted $400 - $500 CDN (say $260-$330 US) to "calibrate" an HP8447D RF preamp. The quote tells us that what we are getting for our money is a check of the return loss, gain, and VSWR. This seems a little involved and a little pricey to me, but it's the first RF preamp I've dealt with, so what do I know? I intend to use the preamp between a wideband antenna (a bicon, log periodic, or combo) and our spectrum analyzer, and I assume the preamp isn't flat, so I need to enter correction factors vs. frequency for it. That's all I was really after: a chart or graph of gain vs. frequency, so that I can set up the antenna-preamp-analyzer combo properly for pre-compliance testing. Does anyone have any comments on what I really need to do here, and whether the price I'm being quoted is typical or not?
2. Surge testing: The generic immunity standards call out a surge test that is applied line-to-line and line-to-ground, except at the highest test voltage level it is only applied line-to-ground. Does anyone know the reason behind this? Is it that line-to-ground is the prevalent mode for the higher surges (in real life) or is just a case of not wanting to spec. a test that everyone will fail (line-to-line at the highest voltage)? Thanks in advance for your help. Regards, Jim Eichner Statpower Technologies Corporation [email protected] http://www.statpower.com Any opinions expressed are those of my invisible friend, who really exists. Honest. --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
