April Instrument was founded in 1989 to bring portability to the
microwave signal generator field. Changes in microwave components
allowed this to happen including the advent of MMIC's ( monolithic
microwave integrated circuits ) which made possible a new level of
miniaturization at reduced cost.
Our first product was the model 8001 which was
introduced in the November, 1989 issue of "Microwaves & RF"
magazine. This unit weighed in at a tiny 2.5 lb. It was soon followed
by the model 8002 which extended the frequency range of the 8001 from
2-8 to 2-10 GHz.
Next came the model 8003 which was featured on the
cover of June, 1997 issue "Test and Measurement World". The 8003
extended the frequency range to 2-20 GHz. With the 8003 internal
adjustments were eliminated in favor of digital correction for improved
ease of calibration and frequency accuracy. A universal input, 90-250
VAC, power supply simplified use in the international marketplace.
Subsequent to the 8003 have been models that extend frequency coverage
down to 0.5 GHz and up to 26.5 GHz.