The Model 4304A wattmeter is a popular choice of wireless communications professionals. This rugged instrument is ideal for anyone who needs to quickly test multiple power and frequency ranges. The versatile 4304A uses a single, permanently mounted, 25–1000 MHz element to deliver full-scale measurements from 5 to 500 watts. A high-quality line section keeps insertion loss to less than 0.10 dB from 25–512 MHz and 0.13 dB from 512–1000 MHz. The resulting full-scale accuracy of ±6 to 7% (depending on frequency) is ideal for many two-way communications applications. Performance is stable to 1000 MHz. Insertion VSWR with the supplied N female connectors is a maximum of 1.12 at 512–1000 MHz and will not exceed 1.08 VSWR at 25–512 MHz. Operation is exceptionally easy. Select the power range you want to measure with the 5-position power selector switch. Forward and reflected power are then measured by simply rotating the element. A chart mounted to the back of the instrument lets you easily determine antenna or load VSWR from power measurements.