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AFC-2500 Frequency Counter

Frequency Counter: Frequency range: 10Hz…2.5GHz, Input signal amplitude: 50mV…250Vpp; optional functions: three inputs (A - up to 2.5GHz, B – up to 500MHz, C – up to 10MHz), Data Hold, LCD display 8 digits, Relative Measurement, Data record (Max., Min., reading), Period, Auto power off, Noncontact measurement capability through antenna. Power Supply: 4x1.5V AA. Dimension: 173x80x35mm / 6.8x3.1x1.4in. Weight: 340g/0.75lb (including battery).

AKTAKOM AFC-2500 compact frequency meter that can easily fit in your palm is designed to measure frequency and signal period. The use of a specialized microprocessor allows introducing a number of "smart" functions. Using the external telescopic antenna you can measure the carrier frequency of various radio transmitting devices.


  • High sensitivity for the VHF & UHF frequency measurement, excellent for CB hobbyist.
  • Handheld & pocket size instrument
  • Wide measuring range up to 2.6GHz
  • Good resolution, 0.1Hz min. display unit for 10MHz range.
  • Used the exclusive Microprocessor IC offered the intelligent function: Frequency, Period, Multi resolution, Data hold, Relative measurement, Data record (Max., Min., Average reading).
  • Auto power off & manual power off.
  • LCD display for low power consumption & clear read-out even in bright ambient light condition.
  • The instrument used the low PPM crystal time base to offer high accuracy measurement.
  • The optional telescoping antenna accessory can be used to pick up transmit frequencies from handheld, fixed or mobile radios such as: POLICES, FIRE FIGHTER'S, HAM, TAXI, AIRCRAFT MARINE, etc. at ranges of approaching 5 to 30 cm (depending on transmitter power, antenna obstructions, etc.).


Display13mm (0.5") LCD (Liquid Crystal Display), 8 digits.
MeasurementFrequency, Data hold, Relative, Memory (max., min., average), Period.
Range2500MHz50MHz to 2500MHz (typical max. 2600MHz)
100MHz5MHz to 120MHz.
10MHz10Hz to 10MHz
Period10Hz to 10MHz
Resolution, Sample TimeRef. the following "Table for Resolution & Sample Time".
Sensitivity (rms)2500MHz range50MHz…75MHz100mV
100MHz range5MHz…100MHz50mV
> 100MHz to 120MHz100mV
Frequency Accuracy± (4PPM+1d) - 23±5°C, after calibration.
Time Base circuit4.194MHz quartz crystal
Time Base Temp. Coeffic0.1PPM/per (typical, 23±5°C).
Over-input2500MHz & 100MHz rangeMax. 5V peak to peak.
10MHz & Period rangeMax. 250V peak to peak
Input ConnectorBNC, female.
CaseDurable & strong ABS-plastic housing.
Operating Temperature0 to 50°C (32 to 122°F).
Operating HumidityLess than 80% RH
Power Supply4 x 1.5V AA (UM-3) battery.
Power Consumption2500MHz & 500MHz rangeApprox. DC 105mA
10MHz & Period rangeApprox. DC 45mA
AC Adapter Power InputOptional, 9V DC , 300 to 500mA rating, central positive for socket.
Power OffAutomatic power off & manual power off
Dimension173x80x35mm (6.8x3.1x1.4in).
Weight340g/0.75lb (including battery).

Resolution & Sample Time

RangeGate Time SelectResolutionSampling Time
SLOW (select 1)200Hzs
SLOW (select 2)500Hz0.75s
SLOW (select 1)20Hz5s
SLOW (select 2)50Hz1.5s
SLOW (select 1)0.2Hz6s
SLOW (select 2)0.1Hz11s

Standard Accessories

  • Instruction Manual

Optional Accessories

  • Telescoping RF pick-up antenna with BNC connector
  • Direct probe with BNC connector & alligator clip pairs. (Be used only for the measuring frequency 500MHz)
  • Soft carrying case

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