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Protek B818 Universal Counter
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Protek B818 Universal Counter


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Protek B818
  • 10Hz to 1GHz measurement range
  • Frequency, Period and Totalize and Self Check modes
  • 8 digit LED display
  • X1 and X10 Input Attenuator
  • 10 PPM temperature stability (oven controlled)
  • Low power consumption and light weight
  • 25mV sensitivity


Model Description List Price Sale Price
B818 1GHz Multi-function Frequency Counter - Discontinued - replaced by Protek B8118

Frequency Measurement Channel A Input
Frequency Range 10Hz to 10MHz Direct
10MHz to 100MHz Prescaled
Resolution Direct: 1Hz, 10Hz, 100Hz (range dependent)
Prescaled: 10Hz, 100Hz, 1000Hz (range dependent)
Gate Time 0.01s, 0.1s, 1s switch selectable
Accuracy ±1 count ± (timebase error) X frequency
Coupling AC
Frequency Measurement Channel B Input
Frequency Range 100MHz to 1GHz
Resolution 100Hz, 1kHz, 10kHz, range dependent
Gate Time 0.027s, 0.27s, 2.7s in 3 decade switch settings
Accuracy ±1 count ± (timebase error) X frequency
Coupling AC
Period Measurement Channel A Input
Range 100ms to 4µs
Period Multiplier X1 to X100 in 3 decade switch settings
Resolution 1ns, 10ns, 100ns range dependent
Accuracy ±1 count ± (timebase error) X Period
Totalized Measurement Channel A Input
Frequency Range 10Hz to 10MHz
Count Capacity 0 to 99,999,999
Resolution ±1 input count
Input Characteristics Channel A
Sensitivity 10MHz Range: 25mV RMS (10Hz to 8MHz)
50mV RMS (8MHz to 10MHz)
100MHz Range: 25mV RMS (10MHz to 80MHz)
50mV RMS (80MHz to 100MHz)
Attenuation X1 or X10
Input Impedance 1MW (C = < 35pF)
Max. Voltage 250V DC and AC RMS
Input Characteristics Channel B
Sensitivity 20mV RMS
Impedance 50W
Max. Input Voltage 3V DC or AC RMS
Timebase
Frequency 10MHz & 3.90625MHz
(Temperature controlled oven)
Stability Short Term: ±3x10-9 for 1 Sec
Long Term: ±2x10-5 per month
Temperature: ±1x10-5, 0 to 40°C
Line Voltage: ±1x10-7 for a 10% change in line voltage
Warm-up Time 20 minutes
General Specifications
Display 8 Digit LED with annunciators and decimal point
Power Requirements AC line voltage: 100/120/220/240V ±10%
Frequency 48Hz to 66Hz
Power Consumption Approx. 12VA
Operating Temperature -5 to 50°C
Size 3.0" H × 8.0" W × 10.0" D
Weight 7 lbs.
Supplied Accessories Manual, Power cord, BNC to Alligator clip input cable



   
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