The USB-S is a family of small, pocket-sized comb generators.  The size is only 3.1”x1.5”x0.8” with a integral SMA connector for RF output, and a USB style connector to power the comb generator.  There are no batteries to change or charge!  Any nearby computer or other device with a standard  USB output can power this device providing it can source 200 mA at 5 VDC.

The family consists of eight (8) products.  Each of the six fundamental frequencies of 1.8 MHz, 10 MHz, 64 MHz, 100 MHz, 133 MHz and 200 MHz are available in a small plastic enclosure.  If more than one fundamental frequency is required, then additional units are very affordable. 

In addition to the four units with the fundamental frequencies, any of the units can be purchased with the option that allows enabling the circuit to turn on or off the pulse  RF output at a low data rate for testing quasi-peak detectors.

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