The 432A power meter is an automatic, self-balancing power meter for use with temperature compensated thermistor sensors. High efficiency and good radio frequency (RF) match are characteristics of the 478A and 8478B coaxial and 486 series (now discontinued) waveguide thermistor mounts that cover the frequency range 10 MHz to 40 GHz.

    Each thermistor mount contains data showing the calibration factor and effective efficiency at six frequencies, directly traceable to the U.S. National Institute of Standards and Technology (NIST) at those frequencies where NIST provides calibration service.

Product Specs:

Power Range: 7 ranges with full-scale readings of 10, 30 100 and 300 µW 1, 3 and 10 mW; also calibrated in dBm from -20 dBm to +10 dBm full scale in 5 dB steps Noise: Less than 0.25% of full scale peak (typical) Response Time: At recorder output, 35 ms time constant (typical) Fine Zero: Automatic, operated by front-panel switch Zero Carryover: Less than 0.50% of full scale when zeroed on most sensitive range Meter: Taut-band suspension, individually calibrated, mirror-backed scales. Milliwatt scale more than 100 mm (4.25 in) long Calibration Factor Control: 13-position switch normalizes meter reading to account for thermistor sensor calibration factor. Range 100% to 88% in 1% steps Thermistor Sensor: Thermistor sensors are required for operation of the 432A. Power Consumption: 115 to 230 Vac ± 10%, 50 to 400 Hz, 1.5 watts No thermoelectric error for high accuracy over a wide dynamic range Optional long cables for measurment convenience