Frequency Counter

• Transport Package: Carton
• Trademark: ShowRange
• Origin: Shanghai
• Model NO.: SRC3165, SRC2000, SRC3371 / SRC3381
• Production Capacity: 3000

Product Description

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;