Greetings! In the past I have used Com-Power COMB Generators for Site Reference Readings. They offer more than one model, with different step rates and Frequency ranges. The models I am aware of are:
Model: CG-501, I MHz Step, 30-1000MHz Model: CG-505, 5 MHz Step, 30-1000MHz Model: CG-515, 1 or 5 MHz step switchable, 30-1000MHz Model: CG-520, 20 MHz Step, 30-4500MHz. My catalog states that these units run $1100 for the 501 and 505, and $1400 for the 515 and 520. I have used these models in the past wth good results. my catalog is relatively old, so you might want to call Com-Power to get the latest prices and available models. They are at: Com-Power Corporation (714) 587-9800 (714) 587-9960 (FAX) www.com-power.com Hope this is helpful! Randy Flinders EMC Test Engineer Emulex Network Systems *note - The opinions expressed herein are personal and in no way reflect the position of Emulex Corporation. ---------- From: Nick Evans[SMTP:[email protected]] Sent: Tuesday, August 05, 1997 1:54 PM To: emc-pstc; YoonHoe LOKE Cc: yhl Subject: RE: ERS (Emissions Reference Source) ---------------------------------------------------- We have a LaPlace Instruments ERS. The advantage of it is that it is cheap compared to alternatives such as York University's CNE. The unit is a comb generator type device providing 2MHz spaced output. It is specified as providing output across the entire range from 30MHz to 1GHz but in fact signal strength is very limited above 900MHz and almost nothing above 950MHz. We use it for comparison work between our calibrated OATs and chamber and other sites. We also use it for daily confidence checks on our emissions setup. The unit is supplied with calibration data which is supposedly traceable back to NPL in the UK but I would not use this data for any kind of site calibration. In fact, the calibration data that was supplied with our unit was incorrect (correct figures were supplied a month or two after purchase with no prompting from us). The biggest problem with the unit is its very limited battery life (about one hour on a full charge we have found) with quite a lengthy charging time (8 hours or so). In summary, you get what you pay for I guess, I have used the York CNE and it is much more usable with significantly longer operating time (4 hours or so I think) but it is 4 times the price of the ERS. For first step comparison work and confidence checking the ERS is fine and we are quite happy with our unit but we do use it for a specific 30 minutes a day maximum for confidence check only. Hope this helps. Best Regards Nick Evans Director Genesys IBS Ltd Worldwide Product Compliance & Localisation Tel: +44 1600 710300 Fax: +44 1600 710301 Mobile: +44 385 367348 (GSM) E-mail: [email protected] (data transfer limit: 2Mb) Web: Http://www.gentel.co.uk/genesys ---------- From: [email protected] on behalf of YoonHoe LOKE Sent: 05 August 1997 06:25 To: [email protected] Cc: [email protected] Subject: ERS (Emissions Reference Source) Hello all, Would appreciate some feedback from anyone who has used an ERS (Emmissions Reference Source). Laplace Instruments sells one. Thank you in advance, Mr. YH Loke Computer Protocol Malaysia
