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February 2011, Vol. 49, No. 2
www.comsoc.org
Passive Optical Networks
l ria to Tu eo c id So d V 9 om n ge C dba Pa ee oa e Fr Br Se
Special Supplement
MAGAZINE
•Next-Generation Mobile Networks •Synchronization over Next Generation Packet Networks
A Publication of the IEEE Communications Society
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F
RF Signal Generators There’s always room for improvement The Agilent N5181A-503 is an excellent 100 kHz to 3 GHz signal generator.
100 kHz
Still, we saw room for improvement ...
to 3 GHz
$8,749
...
Extending the frequency range to 4 GHz Going all the way down to DC Adding a low-noise OCXO timebase Making AM, FM, ΦM & PM all standard And, cutting the price (about in half )
Introducing the SG384 RF Signal Generator ... only from SRS
GHz ... DC to 4
$4,600 You’ll even like the ¿ne print: US List Price $4,600. Standard features: DC to 4.05 GHz with 1 μHz resolution. Output power from +13 dBm to –110 dBm. Phase noise of –116 dBc/Hz at 20 kHz offset from 1 GHz. A 1 s Allan variance of 1 × 10–11. 10 MHz timebase input and output. AM, FM, ĭM, pulse modulation and sweeps from internal or external sources. Ethernet, GPIB, and RS-232 interfaces. Option 1: Differential clock outputs on SMAs with 35 ps transition times ($750). Option 2: Rear-panel SMA output for 4.05 GHz to 8.10 GHz ($750). Option 3: I/Q modulator with external BNC inputs ($750). Option 4: Rubidium timebase for 0.001 ppm/yr aging ($1500). Please visit www.thinkSRS.com for complete speci¿cations.
Stanford Research Systems
Communications IEEE
Tel: 408-744-9040
• www.thinkSRS.com
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Director of Magazines Andrzej Jajszczyk, AGH U. of Sci. & Tech. (Poland)
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IEEE
Editor-in-Chief Steve Gorshe, PMC-Sierra, Inc. (USA) Associate Editor-in-Chief Sean Moore, Centripetal Networks (USA) Senior Technical Editors Tom Chen, Swansea University (UK) Nim Cheung, ASTRI (China) Nelson Fonseca, State Univ. of Campinas (Brazil) Torleiv Maseng, Norwegian Def. Res. Est. (Norway) Peter T. S. Yum, The Chinese U. Hong Kong (China) Technical Editors Sonia Aissa, Univ. of Quebec (Canada) Mohammed Atiquzzaman, U. of Oklahoma (USA) Paolo Bellavista, DEIS (Italy) Tee-Hiang Cheng, Nanyang Tech. U. (Rep. Singapore) Jacek Chrostowski, Scheelite Techn. LLC (USA) Sudhir S. Dixit, Nokia Siemens Networks (USA) Stefan