Frequency Counters
Models 1823A, 1856D
Data Sheet
www.bkprecision.com
Technical data subject to change
© B&K Precision Corp. 2014
v051115
Specifications 1823A 1856D
Range 0.1 Hz - 2.4 GHz 0.1 Hz - 3.5 GHz
Frequency √
Totalize √
Period √
Time Base Stability ±1ppm
Best Resolution 1 nHz
No. of Digits 9
Display Hold √
Low Pass Filter √
Sensitivity
250 mV (0.1 Hz - 1 Hz),
30 mV (1 Hz - 100 MHz),
50 mV (80 MHz - 150 MHz),
50 mV (150 MHz - 2.0 GHz),
60 mV (2.0 GHz - 2.4 GHz)
30 mV (0.1 Hz - 100 MHz),
15 mV (80 MHz - 2 GHz),
20 mV (2 GHz - 3.0 GHz),
30 mV (3.0 GHz - 3.2 GHz),
50 mV (3.2 GHz - 3.5 GHz),
Remote Interface RS232
Self-Test √
Time Interval Measurement √-
Frequency Ratio Measurement √-
AC Input 115/230 V (50/60 Hz)
Weight 5.5 lbs (2.5 kg)
Dimensions (W x H x D) 9.4” x 3.5” x 10.6” (239 x 89 x 269 mm)
One-Year Warranty
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 and Benefits
■±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
Model 1856DModel 1823A
