Description
Description
The HP Model 3556A Psophometer makes both noise and level measurements. For noise measurements, the HP Model 3556A is a sensitive and accurate voltmeter/powermeter. In addition to the two CCITT noise weighting filters there are two low pass filters; 3 kHz and 15 kHz bandwidth may be selected for measuring noise on telephone lines and broadcast channels.
The four filters are built into the instrument and selected by a lever switch, eliminating the need for plug-in filters. Pushbuttons set up circuits to measure either metallic noise (symmetrical noise voltage or normal mode noise voltage) and noise to ground (asymmetrical noise voltage or common mode noise voltage).
NIST-Traceable Calibrations
Standard Calibration Price (without data): Request a Quote
ANSI Z540 Calibration Price (with as-found & as-left data): Request a Quote
ISO/IEC 17025:2005 Accredited Calibration Price (with data & uncertainties): Request a Quote
ANSI Z540.3 with data & uncertainties and Guardbanding: Request a Quote
Test & Measurement Equipment Repair Services: Request a Quote
