Frequency Counter SF-401 PLUS SURECOM Portable CTCSS/DCS Decoder 

Introduction:　
The frequency meter capable of measuring the parameters of the frequency of the continuous carrier signal walkie-talkies , with signal strength indicator.
it is the tool of choice for maintenance personnel ,test frequency and signal strength of wireless enthusiasts.
This portable frequency counter is designed for counting continuous wave signal comes from Two-way Radio. 
There are easy ranges for you to choose. The ranges cover most of the frequency of the two way radios you want to measure. 
Its four-button control is easy to use and its small size allows you to carry it anywhere you like.
 Work by  TCXO(Temperature Compensate X'tal (crystal) Oscillator) ,In the range of -45 ℃ ~ 65 ℃ can reach ± 2 ~ ± 4ppm accuracy
This include very interesting frequency areas such as 2m HAM radio, all VHF and UHF
DMR Radio signal e frequency counter.
Easy Battery level 
digital mode for DMR radio only, not for other digital device
 
Feature & Specification:
   Frequency range: 27Mhz-3000Mhz
! Note: (27MHz to 100MHz It can not be guaranteed and the corresponding normal emission appliance)
  CTCSS/DCS Decoder  (must be 136-174/400-520MHz)
   Frequency counter for DMR radio
   Frequency digital 0.000  or 0.0000  ( +-0.001)
   Work by TCXO( Temperature Compensate X'tal (crystal) Oscillator) 2～2.5ppm
    Frequency Response time:  0.2-0.5sec.( CTCSS/CDCSS >0.5-1sec) 
    TFT Color Display 240 x 320 ,LCD Dim level setting
    Build-in  Li-ion battery
    Net Weight: 113g 
    4 buttons control
    Auto power off  1-9minutes   
    Charging battery LED indicator  
Specifications for SF-401 and SF-401 PLUS 
 
Battery Built-in:    level ICON
TFT LCD:     320 x 240 pixels
Li-ion Battery build-in :     3.7V 600mah
Current consumption:    10MA
TCXO crystal Oscillator    +- 2.5ppm
Changer in:    Micro USB +5V
Impedance input:    50 Ohm (BNC)
Weight:    113g
Dimensions size :    70 x 25 x 90mm
 
Power On/Off                                    
Power On –Press and Hold down the [black key] by 2 second 
Power Off –Press and Hold down the [black key] by 4 second of number count down to 0
Charging the battery 
Plug the Power cord into adaptor , Micro USB connected SF-401, The Led indicating:
 *The RED Led is light - Charging        
 * The Green Led is light - Full 
How to check Frequency measuring.   
 
The transmitter near the frequency counter antenna , see the signal reception conditions is zone green, you can test. Please see Pic.3
cautions: 
e.g. display 1800.000Mhz  , The transmitter distance is too close to the frequency counter will affect the test results, , the signal bar is red .(see Pic.1)
e.g. display 0.000, , The transmitter distance is too far to the frequency counter and signal is weak ,will affect the test results,  the signal bar is low .(see Pic.1)
! Note: (27MHz to 100MHz It can not be guaranteed and the corresponding normal emission appliance) .
 
How to check Frequency of Digital DMR Radio 
Press[ F3 Digital] from Measuring screen mode   See PIC.1
Note: Use Digital mode have 3 Decimal only
MENU funtion setting and save.    
Press [F1] > into menu Page
Press [F3 down] or [F4 Up] into System and Press [F2 Rtn] into system Page PIC.4
Press[F3 down] or [F4 Up] select funtion ,Press [F2 Edit] > [F3 - ][F4 +] change mode
Press[Menu]  >  [F1 ]to Exit  or  [F4 ] to Save and Exit
 
Menu Setting
Rf defect level: The smaller the rf detect level, the more sensitive
How to check CTCSS/DCS code 
1.Radio must be 136-174/400-520MHz
2.Radio must be ANALOG 
 
Package Contents 
1x SF401 PLUS  Frequency Counter
1 x UHF Antenna
1x English User Manual
1x USB charger cable
1x USB AC adapter 100-240V　
 
specification subject to change without notice, the information in this document does not of any contract or quote