Patent ID: 7872467

Claim:
A calibration device for providing a test signal to calibrate an RF Power Meter or a Spectrum Analyzer, the calibration device comprising: a battery power connection; a temperature compensating voltage regulator having an input and an output; a first switch for connecting the battery connection to a voltage regulator; a second switch for connecting the battery connector to the voltage regulator, the second switch providing a different attenuation than the first switch from the battery connection to the voltage regulator; an oscillator having a power supply input connected to the output of the voltage regulator and an output, the oscillator providing a first signal at its output; a frequency divider having an input connected to the output of the oscillator and having an output, the frequency divider having a power supply input connected to the output of the voltage divider; a logic gate providing an AND operation, the logic gate having a first input connected to the output of the oscillator, a second input connected by the second switch to a ground connection, and an output, the logic gate having a power supply input connected to the output of the voltage divider; a low pass filter for converting the first signal from the oscillator to the test signal for providing to an output of the low pass filter; a first resistor for connecting the output of the frequency divider to the low pass filter; a second resistor for connecting the output of the logic gate to the low pass filter; a third resistor connecting the low pass filter to ground; an attenuator having an input connected to the output of the low pass filter and providing an output; and a DC blocking capacitor connecting the output of the attenuator to the output of the calibration device.