Abstract: The present invention relates to a system and method for safe electronic communication for children. According to one exemplary embodiment, the present invention provides a method of monitoring e-mails, text messages, and other forms of electronic communication. In one embodiment, a software system monitors electronic messages for inappropriate content such as inappropriate words and excess skin flesh that would indicate that sexually explicit images are present in the message. If inappropriate content is detected, the message is first sent to a third party, usually a parent or guardian, for review and if acceptable to the third party, the message can be sent to the child. In another exemplary embodiment, the system and method of the present invention provides a calendaring system and points redemption system wherein points can be earned by children and redeemed for awards or merchandise.

Abstract: Disclosed is a low noise microwave frequency synthesizer having a plurality of rapidly switchable output frequencies. Two banks of oscillators are selectively mixed to yield a range of output signals of low phase noise and low spurious noise. The first bank of oscillators comprises low noise, highly stable oscillators of a frequency range below the desired synthesized output signal. The second bank of oscillators comprises low noise, highly stable oscillators of a frequency range lower than the first bank. The signal from the second bank of oscillators is frequency multiplied to a desired frequency range by a low multiplication factor and then mixed with the signal from the first bank of oscillators. Multiplied phase noise is reduced by using a low multiplication factor. The upper sideband of the mixed signals is output as the synthesized output signal. Rapid switching between oscillators in both banks provides a frequency range of synthesized output signals which may be rapidly stepped through as desired.