MFJ MFJ-886B Bedienungsanleitung

MFJ-886B Frequency Counter

User Manual

MFJ Enterprises, Inc

Starkville, MS 39759 USA

MFJ-886B Frequency Counter



Contents

Introduction ...........................................................................3

Features: ........................................................................3

Safety precautions: .........................................................3

Packing list: ....................................................................4

Functional description: ..........................................................4

Functional Description of the Frequency Counter...........5

Operation: .............................................................................8

Operating precautions: ...................................................9

Specifications: .....................................................................10

12 MONTH LIMITED WARRANTY ..................................... 11

MFJ-886B Frequency Counter

Introduction

Thank you for purchasing MFJ-886B Frequency Counter.

Please read this manual carefully before use.

The MFJ-886B frequency counter is specially designed to be

used for frequency measurements, testing and calibration of

wireless devices between 300kHz and 2.8GHz in two ranges.

A telescoping whip antenna Included is for easy reception of

transmitting equipment within about 3M.

Features:

The MFJ-886B is equipped with a ∠45° LCD display

screen showing legible characters in a large font.

LCD backlight for use in low light conditions.

Has a large-capacity lithium battery.

Works continuously for up to 12 hours.

It is provided with a telescopic receiving antenna.

It can work while being charged.

It is designed with wide frequency range of 0.3MHz ~

2.8GHz.

It is light and handy, easy to use and environmentally

friendly.

The case is made of ABS material, which is durable,

abrasion proof, corrosion proof and shatter proof.

It possesses high anti-interference performance.

Safety precautions:

Please keep the MFJ-886B and all the accessories out of the

reach of children and pets in order to avoid injury as a result

of swallowing its small parts and accessories.

Do not place the MFJ-886B in extreme temperature

environments to prevent the reduction of battery capacity and

the shortening of service life of the unit.

DO NOT put the MFJ-886B into a fire. The batteries can

explode if burnt.

MFJ-886B Frequency Counter

Packing list:

Packing List

MFJ-886B

Frequency

Counter

1pcs Power Adapter 1pcs

Telescopic rod

antenna 1pcs User Manual 1pcs

Functional description:

MFJ-886B Frequency Counter

Functional Description of the Frequency Counter

No. Function Icon Description

1 Input terminal of

antenna plug

Input impedance of the

antenna is 50Ω.

2 LCD display

screen

It shows the measured

frequency.

3 Working

indicator light

Sampling rate

indication

4 Power switch

Set to the “OFF”

position to switch off

the frequency counter.

Set to the “ON”

position to switch on

the frequency counter.

Jack of DC

charge power

supply

Input jack of charge

power supply

6 Position of the

RANGE switch.

1. Set to the “50MHz”

position for the

0.3MHz to 50MHz

range.

2. Set to the “2.8 GHz”

position for the

50MHz to 2.8 GHz

range.

7 HOLD key

The function of holding

the reading

MFJ-886B Frequency Counter

8 GATE key

1. This is the frequency

resolution key with four

positions:

Set it in the “1”

position, the resolution

will be 1KHz;

Set it in the “2”

position, the resolution

will be 100Hz;

Set it in the “3”

position, the resolution

will be 10Hz;

Set it in the “4”

position, the resolution

will be 1Hz.

2. The flashing rate of

the LED working

indicator shows the

gate period position.

Holding frame /

Fixing cloth

strap

When needed, pull out

the holding frame to

stand the frequency

counter at an angle of

∠45°.

MFJ-886B Frequency Counter

10 Backlight key

1. It is used to turn on

and off the backlight of

LCD display screen.

2. Press it once and

the backlight of LCD

display screen will be

on; press it once again

and the backlight of

LCD display screen will

turn off.

3. Press and hold it for

3s and the backlight of

LCD display screen will

be on for an extended

period; press it once

again and the backlight

of LCD display screen

will turn off.

11 Charge

indicator light

1. Red light is on

when the frequency

counter is being

charged;

2. Green light is on

when the frequency

counter is fully

charged.

Fine adjustment

access for

frequency

calibration

This access port can be

used for frequency

calibration when needed

to adjust for drift of the

crystal over time due to

aging. An accurate time

base is required to

adjust to the best

frequency counter

accuracy.

MFJ-886B Frequency Counter

Operation:

Set the “POWER” switch in the “ON” position, the LCD

display screen will light up and the Working Indicator light

will flash.

Attach the telescopic rod antenna provided or a test

probe (not provided) into the antenna plug port.

Bring the frequency counter to the wireless transmitting

device under test (the device should be on and in the

transmitting mode). Select the proper frequency range of

transmitting device with the “RANGE” switch. The

frequency counter will receive and show the frequency

from the transmitting device on the LCD display screen

(as shown in the figure below).

Select frequency resolution needed by pressing the

“GATE” key to adjust to the desired position. The Working

Indicator flashes at the GATE rate.

If no key is pressed in 20 minutes after the frequency

counter is switched on the frequency counter will

automatically enter the sleep mode where both the LCD

display screen and the working indicator light will go out.

To wake up the frequency counter from the sleep mode

just press either “HOLD” or “GATE” key.

MFJ-886B Frequency Counter

Operating precautions:

If the transmitting power of transmitting device is higher

than about 10W, make sure the distance between

antennas of the transmitting device and the frequency

counter are at least 30cm to prevent overload and

damage to the internal parts from excessive signal.

When testing with a test probe be careful to not overload

the counter with high level signals or large DC voltages to

prevent overload and damage to the internal parts from

excessive signal.

When installing and removing the frequency counter’s

antenna, hold the antenna by the connector not the whip

to prevent damage to the plug and antenna (as shown in

the figure below).



Do not dispose of this discarded electronic product

together with domestic garbage. Recycle wherever

possible. In some countries and regions, there are

departments and services specializing in sorted collection

and disposal of discarded electronic products. For more

information, please consult local relevant department or

recycling company.

MFJ-886B Frequency Counter

Specifications:

Item Specification

Adapter charger Input:AC100-240V

Output:DC12V 1,000MA

Operating voltage DC7.4V

Operating temperature -10℃~+40°C

Test frequency range in the

50MHz position 0.3MHz～50MHz

Test frequency range in the

GHz position 50MHz～2.8GHz

Lithium battery

DC7.4V/800MA lithium battery

and PCM

(protection circuit module)

Charging time 3 ~ 4 hours

LCD viewing angle ∠45°

Working time ≥12 hours

Timing to sleep mode 20 minutes

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