SPECTRUM ANALYZER Russian patent published in 1996 - IPC

FIELD: instrumentation engineering. SUBSTANCE: spectrum analyzer has series-connected input attenuator, low-frequency filter, three frequency-changing stage each incorporating mixer, intermediate-frequency amplifier, and local oscillator, reading attenuator and detector, as well as stepped sawtooth voltage generator, scanning band control unit, two frequency control units, switch, indicator, shaping unit, clock generator, pulse selector, analog-to-digital converter, three commutators, control and synchronization unit, least value selector unit, delay unit, switch unit, comparator, and adjustable reference level sensor. EFFECT: improved design. 2 cl, 4 dwg