B&K Precision 1856D - Manual - Manual (Page 5)

5
1. PRODUCT DESCRIPTION
1-1. Introduction
This reciprocal FREQUENCY COUNTER is a microprocessor-controlled
instrument for frequency measurement. Due to uniquely developed LSI circuitry in
an expanding/reciprocal system, high accuracy with 9-digit resolution is achieved
with a one second gate time. It covers a frequency range of from 0.1 Hz to 3.5
GHz based on a 10 MHz TCO (Temperature Controlled Oscillator). Other features
include:
 RPM (Revolutions Per Minute) Measuring Function
 External Frequency Standard Input with 9 Digit LED Display
 Attenuator
 Period
 Total
 Low Pass Filter
 Line Filter
Also provided is a self-test function for a quick check of several operating modes.
Each mode can be selected by a front panel push button switch with automatic
decimal points and indicators. The high accuracy, sensitivity and versatility of this
counter make it an extremely valuable instrument to the scientist, engineer,
experimenter and communications technician. Lightweight and compact size make it
practical for use by the hobbyist or field technician.