Frequency Measurements: How-To Guide By National Instruments Corporation
Frequency is the rate of recurrence of a cyclic or periodic event. In physics, you can observe periodicity in rotations, oscillations, and waves. For an analog or digital waveform, you can invert the signal period to obtain the frequency. The smaller the period, the higher the frequency and vice versa.
The Model 20S1G4 is a solid state, self-contained, air-cooled, broadband amplifier designed for applications where instantaneous bandwidth and high gain are required. Housed in a stylish contemporary cabinet, the unit is designed for benchtop use, but can be removed from the cabinet for immediate equipment rack mounting.
The VGLA20RPDC GPS Variable Gain Line Amplifier is a one-input, one-output device featuring a variable gain block with 25 dB of dynamic range. The frequency response covers the GPS L1 and L2 bands with excellent flatness throughout most of the attenuation range.