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> Hewlett packard portable test set model 3550B
Hewlett packard portable test set model 3550B
Hewlett Packard 3550B Portable Test Set
Designed specifically to measure transmission line and system characteristics such as continuity and attenuation distortion, the HP 3550B is particularly useful for lineup and maintenance of multi-channel communication systems. A wide range oscillator, a voltmeter, and a patch panel to match both oscillator and voltmeter to 135, 600, and 900-ohm lines - are all combined and mounted one case that is equipped with a splash-proof cover. Additionally, the oscillator, voltmeter, and patch panel may be used separately whether they are mounted in or removed from the case. Both the oscillator and voltmeter are transistorized and operate from their internal rechargeable batteries or from the AC line. Batteries provide 40 hours of operation between charges and are recharged automatically during operation from the AC line.
