Special Features:

Front panel operator controls shall control the multiple selection of output display formats, automatic tvfm display, automatic output blanking, and display intensity; ac power switch located on front or back; shall be single chassis and mounted in a standard eia 19 inch rack; operating temperatures 0 to 50 degrees (c), humidi type 0 to 95 percent and cooling convection; non operating temperatures -17 to 100 degrees (c) with 0 to 95 percent humidity and cooling convection; weight shall not exceed 6 pounds; 38 data lines representing each displayed decimal digit in binary coded decimal (bcd) format; 8 data lines representing the identification character in ascii format; 2 strobe lines, 1 positive true, and 1 negative true; one sign bit line

Properties:

An instrument used to count the frequency of recurrent electronic events and display the count on the panel of the instrument in numeric form. May also include facilities for a readout printed on tape. May include facilities for a very accurate output which can be used as a secondary transfer standard. It can be used to measure frequency, period, time interval, phase angle, frequency ratio, and for multiple period averaging. See also counter, electronic, digital and indicator, digital display.