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).

Manuals:

AFC-2500_Users_Manual.pdf (1.11 Mb)

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.

Features

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.).

Specifications

Display	13mm (0.5") LCD (Liquid Crystal Display), 8 digits.
Measurement	Frequency, Data hold, Relative, Memory (max., min., average), Period.
Range	2500MHz	50MHz to 2500MHz (typical max. 2600MHz)
	100MHz	5MHz to 120MHz.
	10MHz	10Hz to 10MHz
	Period	10Hz to 10MHz
Resolution, Sample Time	Ref. the following "Table for Resolution & Sample Time".
Sensitivity (rms)	2500MHz range	50MHz…75MHz	100mV
		76MHz…2500MHz	50mV
	100MHz range	5MHz…100MHz	50mV
		> 100MHz to 120MHz	100mV
	10MHz	50mV
	Period	50mV
Frequency Accuracy	± (4PPM+1d) - 23±5°C, after calibration.
Time Base circuit	4.194MHz quartz crystal
Time Base Temp. Coeffic	0.1PPM/per (typical, 23±5°C).
Over-input	2500MHz & 100MHz range	Max. 5V peak to peak.
	10MHz & Period range	Max. 250V peak to peak
Input Connector	BNC, female.
Case	Durable & strong ABS-plastic housing.
Operating Temperature	0 to 50°C (32 to 122°F).
Operating Humidity	Less than 80% RH
Power Supply	4 x 1.5V AA (UM-3) battery.
Power Consumption	2500MHz & 500MHz range	Approx. DC 105mA
	10MHz & Period range	Approx. DC 45mA
AC Adapter Power Input	Optional, 9V DC , 300 to 500mA rating, central positive for socket.
Power Off	Automatic power off & manual power off
Dimension	173x80x35mm (6.8x3.1x1.4in).
Weight	340g/0.75lb (including battery).

Resolution & Sample Time

Range	Gate Time Select	Resolution	Sampling Time
2500MHz	FAST	1000Hz	0.5s
	SLOW	100Hz	2.75s
	SLOW (select 1)	200Hz	s
	SLOW (select 2)	500Hz	0.75s
500MHz	FAST	100Hz	0.75s
	SLOW	10Hz	6s
	SLOW (select 1)	20Hz	5s
	SLOW (select 2)	50Hz	1.5s
10MHz	FAST	10Hz	0.5s
	SLOW	1Hz	1.25s
	SLOW (select 1)	0.2Hz	6s
	SLOW (select 2)	0.1Hz	11s

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

AFC-2500 Frequency Counter - side view

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AFC-2500 Frequency Counter - top view

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AFC-2500 Frequency Counter - antenna

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AFC-2500 Frequency Counter - antenna

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