User manual

59
Counters
www.bkprecision.com
Model 1823A Model 1856D
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),
25 mV (80 MHz - 150 MHz),
20 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),
30 mV rms
Remote Interface RS232
Self-Test √
Time Interval Measurement √ -
Frequency Ratio Measurement √
-
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)
The 1823A and 1856D are reciprocal 2.4 GHz
and 3.5 GHz universal 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, experimenters and communica-
tions 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