1856D BK Precision 1856D 3.5GHz Frequency Counter 频率计

是否提供加工定制	否	品Pai	BK Precision
型号	1856D	测量范围	3.5GHz
产品用途	AC or DC selectable

BK Precision 1856D 3.5GHz Frequency CounterWide measuring range up to 3.5GHzBright nine digit LED displayPeriod mode for accurate low frequency measurementTotalize mode permits counting of individual eventsAccurate TCXO time base

Input A Characteristics
Frequency Range	0.1 Hz to 100 MHz (DC coupled) 30 Hz to 100 MHz (AC coupled)
Sensitivity	30 mV rms
Coupling	AC or DC selectable
Impedance	1 MΩ resistance shunted by < 40 pF
Attenuator	x1 or x10 switch selectable
Low Pass Filter	-3 dB point at approx. 100 KHz, switch selectable
Accuracy	± Time base error ± resolution (Table 1)

Resolution and Number of Displayed Digits
Time Base Selector	INT	EXT	INT	EXT	INT	EXT	INT	EXT
Gate Time	0.01S		0.1S		1S		10S
Number of Display Digits	5	6	6	7	7	8	8	9
Frequency (Input A)	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	0.1mHz	10 µHz	10 µHz	1 µHz	1 µHz	0.1 µHz	0.1 µHz	10nHz
10 Hz-99 Hz	1 mHz	0.1mHz	0.1mHz	10 µHz	10 µHz	1 µHz	1 µHz	0.1 µHz
100 Hz-999 Hz	10mHz	1 mHz	1 mHz	0.1mHz	0.1mHz	10 µHz	10 µHz	1 µHz
1 KHz-9.9 KHz	0.1 Hz	10 mHz	10 mHz	1 mHz	1 mHz	0.1 Hz	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	0.1mHz
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	1 Hz	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
100MHz	10 KHz	1 KHz	1 KHz	100 Hz	100 Hz	10 Hz	10 Hz	1 Hz

Max. Input Voltage Level
Period Range	10 nS to 10 S
Display	n/µ/m (nano/micro/milli) Sec. with decimal point
Total Range	10 Hz to 30 MHz
Capacity	0 to 999 999 999, OVER FLOW: "OF"
RPM Range	600 to 600 x 106 RPM, OVER FLOW: "OF"
Input C Characteristics
Frequency Range	80 MHz to 3.5 GHz
Sensitivity	15mV from 80 MHz to 2000 MHz 20mV from 2000 MHz to 3.0 GHz 30mV from 3.0GHz to 3.2GHz 50mV from 3.2GHz to 3.5GHz
Coupling	AC only
Impedance	50 Ω ±5%
Max. Input Level	3 V rms sine wave

Resolution and Number of Displayed Digits
Time Base Selector	INT	EXT	INT	EXT	INT	EXT	INT	EXT
Gate Time	0.01S		0.1S		1S		10S
Number Of Displayed Digits	5	6	6	7	7	8	8	9
Frequency (Input C)	Resolution
100 MHz-999 MHz	10 KHz	1 KHz	1 KHz	100 Hz	100 Hz	10 Hz	10 Hz	1 Hz
1 GHz-3.7 GHz	100 KHz	10 KHz	10 KHz	1 KHz	1 KHz	100 Hz	100 Hz	10 Hz

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 V p-p or more. TTL (10TTL)
Capacitance	15pF
Ext. Std. In	10 MHz (External Standard Frequency Input)
Level	1.5Vrms to 5Vrms
Impedance	Approx. 600Ω
Display Characteristics
Display	Nine Digit 0.56" LED with M (Mega) or K (Kilo) Hz; nano, micro, or milli (n/µ/m) Sec.; GT (GATE TIME); H (HOLD); and OF (OVERFLOW) indicators. FUNCTION and GATE TIME are user selected. OF display is shown when the count exceeds 999 999 999
Hold	In the FREQUENCY, PERIOD, TOTAL, RPM modes, 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 < 10 mS - Somewhere between 0.9 and 9mS < 0.1 S - Somewhere between 9 and 90mS < 1 S - Somewhere between 90 and 900mS < 10 S - Somewhere between 0.9 and 9S
Note	Last measurement display will remain for 10 seconds after signal off
General
Dimensions (WxHxD)	9.4 x 3.5 x 10.6" (240 x 90 x 270mm)
Weight (Approx)	5.5lbs. (2.5 kg.)
Power	115VAC±10%, 50-60 Hz, 9 W
Plug and Socket	3 wire ac power plug and 3 wire outlet
Fuse	500 mA/ 250V F type
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
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