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HEWLETT-PACKARD
JOURNAL
T E C H N I C A L I N F O R M A T I O N F R O M T l (ORATORIES
Vol. 12, No. 5
BUSHED CALIFORNIA THE HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA JANUARY, 1961
A New Frequency Counter Plug-In Unit
for Direct Frequency Measurements to 510 MC
ONE of the significant steps in extending because the action of the converter is to
the usefulness of the high-speed fre subtract a selected, known harmonic of the
quency counter was the development of the counter's precision time base frequency from
plug-in frequency converter. This convert the frequency being measured, leaving a
er enabled the accuracy, speed, and conven difference frequency in the range from 0 to
ience of the basic 10- 10 megacycles to be measured by the counter
SEE AtSO:
New microwave megacycle counter to itself.
frequency doubters, p. 3
be extended by several Despite the increase in the operating fre
decades. Now, an additional converter has quency range, the new converter's operation
been developed that enables frequency is even simpler than previous converters.
measurements to be made from 100 mega To measure a frequency with the new unit,
cycles to above 500 megacycles. Like the it is only necessary to tune one control until
other converters, the new unit enables these a reading is obtained on the panel meter.
measurements to be made with the full accu