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8470B Datasheet(PDF) 4 Page - Agilent(Hewlett-Packard) |
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8470B Datasheet(HTML) 4 Page - Agilent(Hewlett-Packard) |
4 / 4 page © Agilent Technologies, Inc. 2009 Printed in USA, May 25, 2009 5952-8299 Applications These detectors can be used in a wide variety of applications ranging from lab and production measurements to systems components. Because of their flat- ness and match, these detectors can be used for accurately measuring trans- mission and reflection characteristics in CW or swept-frequency measurements. For these applications in which both flat-frequency response and square-law characteristics are important, Option 423B, 847xB/C–001 provides a matched pair of detectors that track each other within a few tenths of a dB, and Option 423B, 847xB/C–002 (external square-law load) extends the square-law region up to at least 0.1 mW (10 dBm). Other common applications include use with a coupler or power splitter to externally level a source, and to display pulsed-RF and AM-modulated signals. For OEM and systems applications, the broadband flatness and ruggedness of these detectors make them particularly well suited for use in closed-loop level- ing circuits in microwave instrumentation. Square-law response For many reflection and transmission measurements it is desirable to use the detector in its square-law region where its output voltage is proportional to the input RF power. As shown in figure 5, the LBSD typically operate within 0.5 dB of square-law from the tangential signal sensitivity (TSS) level up to 18 dBm. By specifying Option 423B, 847xB/C–002, a specially selected loading resistor is provided which extends this square-law region to approximately 8 dBm with an associated decrease in sensitivity as shown in figure 5. Pulse response The LBSD detectors have extremely good pulse detection characteristics when working into low-capacitance, low-resistance loads. When loaded externally with 50 Ω the LBSD detector can typically display 8 to 12 ns rise times. Figure 6 illustrates the equivalent circuit for the detector, as well as typical values for the diode impedance and the RF bypass capacitor. Ordering Information To add options to a product, use the following ordering scheme: Model: 847xB/C (x= 0, 2 or 3) Example options: 8472B–001, 8473C–001 423B–001 Matched pair of detectors 847xB/C–001 423B–002 External square-law load 847xB/C–002 Product specifications and descriptions in this document subject to change without notice. RF in 50 V Video out RF bypass capacitor Diode impedance Figure 7. Detector equivalent circuit For more information on Agilent Technol- ogies’ products, applications or services, please contact your local Agilent office. The complete list is available at: www.agilent.com/find/contactus Americas Canada (877) 894-4414 Latin America 305 269 7500 United States (800) 829-4444 Asia Pacific Australia 1 800 629 485 China 800 810 0189 Hong Kong 800 938 693 India 1 800 112 929 Japan 0120 (421) 345 Korea 080 769 0800 Malaysia 1 800 888 848 Singapore 1 800 375 8100 Taiwan 0800 047 866 Thailand 1 800 226 008 Europe & Middle East Austria 01 36027 71571 Belgium 32 (0) 2 404 93 40 Denmark 45 70 13 15 15 Finland 358 (0) 10 855 2100 France 0825 010 700* *0.125 €/minute Germany 07031 464 6333 Ireland 1890 924 204 Israel 972-3-9288-504/544 Italy 39 02 92 60 8484 Netherlands 31 (0) 20 547 2111 Spain 34 (91) 631 3300 Sweden 0200-88 22 55 Switzerland 0800 80 53 53 United Kingdom 44 (0) 118 9276201 Other European Countries: www.agilent.com/find/contactus Revised: October 6, 2008 www.agilent.com www.agilent.com/find/emailupdates Get the latest information on the products and applications you select. |
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