FREQUENCY COUNTER

 

 

Model SRC3165 - Precision Frequency Counter

 

Channel A (0.01Hz ~ 50MHz)
Frequency Range: DC couple 0.01Hz to 100Hz
                            AC couple 100Hz to 50MHz
Sensitivity: AC: 100Hz ~ 50MHz < 50m Vrms
                 DC: 0.01Hz ~ 1Hz ≤ 500m Vp-p
                 1Hz ~ 100Hz ≤ 80m Vrms
Impedance: 1 Mohms
Attenuator: X1, X20
Max. Safety Voltage: 30V (DC/AC peak)
 

Channel B (50MHz ~ 2.4GHz)
Frequency Range: from 50MHz to 2.4GHz
Sensitivity: 50MHz ~ 1.2GHz ≤ 50m Vrms
                1.2GHz ~ 2.4GHz > 80m Vrms
Coupling: AC only
Impedance: 50 ohms
Max. Safety Voltage: 3V

 

Time Base: Short-Time Stability: ± 3 x 10-9/sec
                  Long-Time Stability: ± 2 x 10-5/month
                  Temperature Drift Coefficient: ± 1 x 10-5, 10°C ~ 40°C
                  Line Voltage Variation: ± 1 x 10-7 for line voltage ± 10%
Gate Time: continuously variable from 100ms to 10s
Display: 8 digits, 19 x 12.5mm LED display with steps, frequency, period, kHz/s and MHz/ms indication
Precision: standard time error (t) x frequency (f) ± 1d
Power Supply: 110V/220V ± 10%, 50Hz or 60Hz
Preheat Time: 20 min
Operation temperature: 0°C ~ 50°C, 10 ~ 90% RH
Storage Temperature: -40°C ~ 60°C, 5 ~ 90% RH
Weight: approx. 1.6kg
Dimensions: 270 x 215 x 100mm
Accessories: this manual, power cord, test probe

 

   

 

Model SRC2000 - Frequency Counter

This SRC2000 is an intelligent multi-function instrument which measures Frequency, Pulse counting, Crystal. It has 4 step gate time, 5 range function select and 8 digits display.

All functions depend on single CPU, A crystal controlled temperature circuit provides constant compensation for the temperature drifting.

Technique specifications:

A. Measurement

1. Input terminal

There are 3 input terminals on this instrument:

CHA. High frequency 50 MHz - 2,4000 MHz

CHB. Low frequency  10Hz - 50 M Hz

Crystal Oscilloscope: for crystal measurement

Step

Function

Frequency

Resolution

0.1 S

1.0 S

5.0 S

10 S

 

Frequency Measurement

2400MHz - 1000MHz

1 KHz

100Hz

100Hz

100Hz

990MHz - 100MHz

1 KHz

100Hz

10 Hz

10Hz

99 MHz - 50 MHz

1 KHz

100Hz

10Hz

10Hz

50 Mhz-4 Mhz

100Hz

10 Hz

1Hz

1 Hz

2

4 Mhz - 10 Hz

10 Hz

1 Hz

0.1 Hz

0.1Hz

3

4

Counting

Max 99999999

-

-

Crystal Oscillator Measurement

16M Hz -3.5 M Hz

10 Hz

1 Hz

1 Hz

1 Hz

Gate Time: 0.1S,1.0S,5.0S, 10S

Accuracy: Time base deviation X frequency +- 1 d

Progressive Counting measurement

4 steps CHB input terminal

resolution: +- 1d, counting frequency: 10Hz - 4Mhz

Crystal measurement:

Input Features:

Input sensitivity for CHA  25mVrms/200m Vrms

Input impedance: approx. 50 Ohm

Max safety voltage 3 V

Input sensitivity for CHB: No.2 range 25m Vrms/80 m Vrms

                            No.3 range 10mVrms/30m Vrms

Input impedance: approx. 1 M ohm ( less than 35 pF)

Max Input safety voltage: 30V

Time base:

Short term stability: +- 3 X 10-9/second

Long term stability: +- 2 X 10-5/Month

Temperature: +- 2 X 10-5/10oC - 40o C

Power: 110 - 220V

Size: 270 X 215 X100 mm

Weight: Approx. 1550 g.

 

   

 

 

Model SRC3371 / SRC3381 - Multi function Counter

Feature
Microprocessor to realize intelligent measurement;
Low pass filter and attenuator in pre-position circuit;
Count backwards, realize the equivalent accuracy
measurement with fast speed and high sensitivity;
Micro SCM to measure freq period and intelligentize the management;
LSI design and CPLD application to diminish the components qty
and the average working time be not less than 10000h without fault;
Fine outline, small, light, easy to handle;

 

 

Specifications

SRB3371

SRB3381

Frequency measurement

1Hz - 1.5GHz

1Hz - 3GHz

Cycle measurement

10ns-1s

Count capability 

108-1

Input impedance

Channel A   1MΩ//40pF

Channel B   50Ω

Input coupling mode

AC

Waveform adaptability

Sine, triangle, pulse

Dynamic of input voltage

Channel A

30mVrms - 250Vp - p

Channel B 

30mVrms - 1Vrms

Frequency measurement

Channel A

1Hz - 10MHz/100MHz

Channel B 

100MHz - 1GHz/1.5GHz

Channel A low pass filter

3dB bandwidth is about 100kHz

Channel A attenuation

×1 or ×20

Measurement error

± time base error ± trigger error ±LSD

LSD100ns/Strobe time×measured frequency (or measured period)     

Trig error

When the measured signal noise is 40dBtrigger error ≤0.3%

Strobe time

10ms, 100ms, 1s, 10s

Count capability 

0 - 99,999,999

Crystal  vibrator freq

10MHz

Freq stability of Crystal  vibrator

1×10-5/d

Ext input frequency

10MHz

Ext freq input amplitude

>1Vp-p

Display

8 digits high bright, 0.5 inch numeral tube,3 units LED indicator, a strobe LED indicator and a ext freq mark LED indicator;

Mechanic character

Dimension

90H×280W×240Dmm

Weight

1.5KGS

   

 ( If you need user manual or E-catalogue for above meters, please ask for at: xiushunjie@gmail.com )