问题：
Is there a preamp I can use on the Spectrum Analyzers WCA230A+ WCA280A+ RSA2203A+ RSA2208A+ RSA3303A+ RSA3308A and RSA3408A?
答案：
The upgrade for the preamp is WCA2UP 1A. It covers 100 MHz to 3 GHz. It is powered through the 6 pin Lemo connector on the front panel of the spectrum analyzer. The WCA230A, WCA280A and all RSA2200A series, RSA3300A series and the RSA3408A all have this connector for power on the front panel.
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