550MHz Frequency Counter   Model 1122-3
 
     
 
Features  
  • Low Cost, High Quality, Compact & Light Weight
  • Microcontroller Based Advance Technology
  • Wide Frequency Range 0.2Hz to 550MHz
  • Reciprocal Counting for Low Frequencies
  • High Sensitivity
  • 4 Selectable Gates
  • Display Hold Facility
Model 1122-3

Technical Specifications 
Frequency Range  
Input I 0.2Hz to 100MHz (AC/DC coupling).
Input II 40MHz to 550MHz (AC coupling).
Trigger  
Level Auto level trigger.
Slope +/- selectable.
Gate Time 0.01, 0.1, 1, 10 sec selectable.
Accuracy 0.002%.
Sensitivity  
Input I 20mV.
Input II 25mV.
Input Impedance  
Input I 1Mohms // 25pF nominal / 50 ohms.
Input II 50 ohms nominal.
Max. Input Voltage  
Input I 0.2Hz to 5KHz : 300V (DC+AC pk).
5KHz to 110MHz : 5.5V + (1.25 x 106 rms) / (Freq. in Hz).
Input II DC - 50V.
AC - 3V rms.
Input Range -27dBm to +19dBm (AC coupled).
Damage Level 5V rms.
Attenuator x1 & x10.
Annunciators LED indication for Gate Time, HOLD, Overflow Hz, KHz, MHz.
Display 0.56”, 8 digit LED display.
Display Time 0 - 1 sec to 2 sec & display hold.
Time Base  
Time Base Freq. 10MHz.
Power 230V AC ±10%, 50/60Hz.
Dimensions 310 (D) x 90 (H) x 240 (W) mm (approx.).
Weight 4.5 Kg.
 

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