4521, Single Meter-Single Element Panel-Mount Wattmeter
The 4521 is a single element socket and single meter unit. It's designed for power measurement in CW and FM systems that employ 50-Ohm cable or 7/8" EIA transmission lines. The rack panel fits standard 19-inch equipment racks and uses the same elements as the Bird Model 43 wattmeter which are sold separately. Depending on the element selected. Forward and reflected power are measured by rotating the element.
Frequency Range: 450 kHz-2.7 GHz (depending on element)
Power Range: 100 mW to 10 kW using Bird® Plug-in Elements
Accuracy +/- 5% of full scale
Insertion VSWR: 1.05 (max) to 1000 MHz [with N-Type Connectors]