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The 1823A and 1856D are reciprocal 2.4 GHz and 3.5 GHz frequency counters that are microprocessor controlled. Their LED displays can provide up to nine digits of resolution using an external time base with a 10 s gate time. The high accuracy, sensitivity, and versatility of these counters make them an extremely valuable instrument to scientists, engineers, and communications technicians for a broad spectrum of laboratory and service applications.

Features:

±1PPM Time base stability

Trigger level function (1823A only)

Frequency ratio measurement function (1823A only)

Time interval measurement function (1823A only)

RPM measurement function (1856D only)

External frequency standard input

Bright LED display

Attenuator

Period

Total

Low pass filter

Line filter

RS232C Interface

Brand/Series	1823A | 1856D Series
Counter Type	Frequency
Display Resolution	9 Digits
Display Type	LED
Frequency Range	3.5 GHz
Frequency, Operating	3.5 GHz
Input Type	External Frequency Standard
Number of Channels	1
Number of Digits	9
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