BK Precision 1823A 2.4GHz Universal Frequency Counter with Ratio Function. New in Box.

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Discontinued

Product Code: 1823A

Description

Application Notes

Datasheet PDF Format

Technical Specifications

Input A Characteristics

Frequency Range


0.1Hz to 100MHz (DC Coupled)
30Hz to 100MHz (AC Coupled)

Sensitivity


0.1Hz to 100MHz: 30mV

Coupling


AC or DC Selectable

Impedance


1 MΩ Resistance, Shunted by <40pF

Attenuator


x 1 or x 10 Switch Selectable

Low Pass Filter


-3dB Point of 100kHz, Switch Selectable

Trigger Level


+350mV to -350mV (Preset 0V)

Slope


Positive or Negative Slope Switch Selectable

* Note: Trigger error is typically ±0.3% of reading by the number of cycles averaged for input signals having better than 40dB S/N ratio and greater than 100mV amplitude.

Resolution and Number of Displayed Digit

Time Base Selector
	INT	EXT	INT	EXT	INT	EXT	INT	EXT

Gate Time
	0.01S	0.1S	1S	10S

Number of Displayed Digit
	5	6	6	7	7	8	8	9

Frequency (Input A, B)
	Resolution

0.1 Hz-0.99 Hz


10 µHz


1 µHz


1 µHz


0.1 µHz


0.1 µHz


10nHz


10nHz


1nHz

1 Hz-9.9 Hz


0.1 mHz


10 µHz


10 µHz


1 µHz


1 µHz


0.1 µHz


0.1 µHz


10nHz

10 Hz-99 Hz


1 mHz


0.1 mHz


0.1 mHz


10 µHz


10 µHz


1 µHz


1 µHz


0.1 µHz

100 Hz-999 Hz


10 mHz


1 mHz


1 mHz


0.1 mHz


0.1 mHz


10 µHz


10 µHz


1 µHz

1 kHz-9.9 kHz


0.1 Hz


10 mHz


10 mHz


1 mHz


1 mHz


0.1 mHz


0.1 mHz


10 µHz

10 kHz-99 kHz


1 Hz


0.1 Hz


0.1 Hz


10 mHz


10 mHz


1 mHz


1 mHz


0.1 mHz

100 kHz-999 kHz


10 Hz


1 Hz


1 Hz


0.1 Hz


0.1 Hz


10 mHz


10 mHz


1 mHz

1 MHz-9.9 MHz


100 Hz


10 Hz


10 Hz


1 Hz


1Hz


0.1 Hz


0.1 Hz


10 mHz

10 MHz-99 MHz


1 kHz


100 Hz


100 Hz


10 Hz


10 Hz


1 Hz


1 Hz


0.1 Hz

100 MHz


10 kHz


1 kHz


1 kHz


100 Hz


100 Hz


10 Hz


10 Hz


1 Hz
(Table 1)

Accuracy


± Time base Error ± Resolution (Table 1)

Period Range


10 nS to 10 S

Display


n. u. m., Sec with decimal point

Total Range
Capacity
Over Flow


DC to 30 MHz
0 to 999 999 999
OF

Max. Input Voltage Level

Fig. 1 Max. Input Level (Input A, B)

Input B Characteristics

Frequency Range


0.1Hz to 100MHz (DC Coupled)
30Hz to 100MHz (AC Coupled)

Sensitivity


0.1Hz to 100MHz: 30mV

Coupling


AC or DC Selectable

Impedance


1 MΩ Resistance, Shunted by <40pF

Attenuator


x 1 or x 10 Switch Selectable

Low Pass Filter


-3dB Point of 100kHz, Switch Selectable

Slope


Positive or Negative Switch Selectable

* Resolution and Number of displayed digit (Table 1): Same as Input A
* Max. Input Voltage Level (Fig. 1): Same as Input A

Time Interval (A -> B)

Range


0.1 µSec-10Sec (0.1Hz-10MHz)

LSD


100nSec

Resolution


± LSD ± Trigger Error*

Accuracy


± LSD ± Trigger Error ± Time base error x T.I.

Multiplier


1, 10, 100, 1000 (Gate Time: 10S, 1S, 0.1S, 0.01S)

Ratio (A/B)

Range


0.1Hz to 10MHz (input A)
0.1Hz to 10MHz (input B)

Resolution


± LSD ± (B Trig. Error x Freq. A)/N

Accuracy


±1 Count of A ± B Trig. Error x Freq. A.

Input C Characteristics

Frequency Range


80 MHz to 2.4 GHz

Sensitivity


25mV from 80 MHz to 150 MHz
20mV from 150 MHz to 2.0 GHz
60mV from 2.0 GHz to 2.4 GHz

Coupling


AC only

Impedance


50 Ω ± 5%

Max. Input Level


3 Vrms sine wave

Resolution and Number of Displayed Digit

Time Base Selector
	INT	EXT	INT	EXT	INT	EXT	INT	EXT

Gate Time
	0.01S	0.1S	1S	10S

Number of Displayed Digit
	5	6	6	7	7	8	8	9

Frequency (Input C)
	Resolution

80 MHz-99 MHz


1 kHz


100 Hz


100 Hz


10 Hz


10 Hz


1 Hz


1 Hz


0.1 Hz

100 MHz-999 MHz


10 kHz


1 kHz


1 kHz


100 Hz


100 Hz


10 Hz


10 Hz


1 Hz

1 GHz-2.4 GHz


100 kHz


10 kHz


10 kHz


1 kHz


1 kHz


100 Hz


100 Hz


10 Hz
(Table 2)

Time Base Characteristics

Type


TCO (Temperature controlled oscillator)

Frequency


10.000000 MHz

Stability


±1 PPM (±1 count)

Line Voltage Stability


Less than ±1 PPM with ±10% line voltage variation.

Temperature Stability


±5 PPM from 0°C to 50°C

Max. Aging Rate


±5 PPM/year

Int. Std. Out


10 MHz (internal standard frequency output)

Level


1 Vpp or more.

Impedance


Approx. 600 Ω

Ext. Std. In


10 MHz (external standard frequency input)

Level


1.5 Vrms to 5 Vrms

Impedance


Approx. 600 Ω

Display Characteristics

Display


Nine Digit 0.56" LED with M/n, k/µ, Hz, m, Sec, G.T., Hold, and "OF" indicators. Function and Gate time: User Selected. "OF" Display shown when Count exceeds 999 999 999.

Hold


In Frequency and Period, TOTAL. Mode measurement in progress is stopped, and the last complete measurement is displayed. When Hold is released, a new measurement begins.

Gate Time


Depending on input frequency
<10mS------------Somewhere between 0.9 and 9mS
<0.1S--------------Somewhere between 9 and 90mS
<1S-----------------Somewhere between 90 and 900mS
<10S---------------Somewhere between 0.9 and 9S

Note: Last Measurement Display will remain for 10 Seconds after SIGNAL OFF.

Dimensions and Weight

Dimensions (W x H x D)


3.4 x 3.5 x 10.6" (240 x 90 x 270mm)

Weight


Approx. 5.5 lb (2.5 kg.)
Equipment Ratings

Plug and Socket


3 wire AC power plug and 3 wire outlet

Power & Fuse Ratings
Input Voltage	Fuse	Power Max.
103 ~ 126V AC (50/60Hz)	F 0.5A / 250V	15 W
206 ~ 252V AC (50/60Hz)	F 0.2A / 250V

Operating Environment

Temperature


0°C to +40°C (Accuracy Specified at 23°C ± 5°C)

Humidity


up to 85% RH (Relative Humidity) to 40°C without temperature extremes causing condensation within the instrument.

Storage Environment

Temperature


-20°C to +70°C

Humidity


below 85% RH

Insulation Category II


Portable equipment of local level.

Pollution Degree


2

Protection to IEC 529


Ordinary

Features

The model 1823A is a reciprocal 2.4GHz universal frequency counter that is microprocessor controlled. The LED display can provide eight digits of resolution using the internal 10S gate time. The high accuracy, sensitivity and versatility of this counter make it an extremely valuable instrument to scientists, engineers, experimenters and communications technicians.

+1PPM Time base stability
Trigger function
Frequency ratio measurement function
Time interval measurement function
External frequency standard input
Bright LED display
Attenuator
Period
Total
Low pass filter
Line filter
RS-232C Interface

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