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  ITEM DETAILS
 
Item Name: Frequency Counter SF-401 PLUS SURECOM Portable CTCSS/DCS Decoder
USD 44.50   USD 55.50
 
Item Code: SF-401PLUS
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Frequency Counter SF-401 PLUS SURECOM Portable CTCSS/DCS Decoder

  Description
 

 
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 

FUNTION  SF-401-PLUS
 DIGITAL RADIO signal: DMR 
CTCSS/DCS CHECK  136-174 / 400-520MHz
 Signal attenuation s.w.
-10db 
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.    See PIC.3

 

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.    See PIC.4
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

How to check CTCSS/DCS code 
1.Radio must be 136-174/400-520MHz
2.Radio must be ANALOG 

 CTCSS/DCS Decoder for ANALOG mode

CTCSS (Hz)    
50.0 97.4 151.4 192.8
55.0 100.0 156.7 196.6
67.0 103.5 159.8 199.5
69.3 107.2 162.2 203.5
71.9 110.9 165.5 206.5
74.4 114.8 167.9 210.7
77.0 118.8 171.3 218.1
79.7 123.0 173.8 225.7
82.5 127.3 177.3 229.1
85.4 131.8 179.9 233.6
88.5 136.5 183.5 241.8
91.5 141.3 186.2 250.3
94.8 146.2 189.9 254.1

 CDCSS  for ANALOG mode (N code only)

Standard(N) sf401
check
  Standard(N) sf401
check
  Standard(N) sf401
check
  Standard(N) sf401
check
23 23 143 143   266 465 465
25 25   145 271 271 466 466
26 26 152 152   274 503 503
31 31 155 155 306 306 506 506
32 32 156 156 311 311 516 516
  36 162 162 315 315 532 532
43 43 165 165   325 546 546
47 47 172 172 331 331 565 565
51 51 174 174   332 606 606
  53 205 205 343 343 612 612
54 54   212 346 346 624 624
65 65 223 223 351 351 627 627
71 71   225   356 631 631
72 72 226 226 364 364 632 632
73 73 243 243 365 365 654 654
74 74 244 244 371 371 662 662
114 114 245 245 411 411 664 664
115 115   246 412 412 703 703
116 116 251 251 413 413 712 712
  122   252 423 423 723 723
125 125   255 431 431 731 731
131 131 261 261 432 432 732 732
132 132 263 263 445 445 734 734
134 134 265 265 464 464 743 743
  754 754
 

 

 

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 

 


 

SF-401PLUS

SF-401PLUS

 

  .SF-401 SURECOM

 

Q&A of SF-401 plus Frequency Counter

Problem: Frequency counter cannot check VHF frequency

Solutions:

1) Swtich the ATT button into left hand side

2)  Then change the antenna into VHF or Dual band, as customer are using UHF antenna, but checking VHF band

3)  If you really using the UHF antenna to check it, please try to slant your radio to the frequency counter, like the following picture

SF-401 Problem SURECOM

 

 


 SF-401 Testing
SF-401 frequency

 
 


 ANTENNA / ANALYZER
     
VSWR /POWER / METER :
sw102 sw202
       
Frequency Counter  With CTCSS / DCS SCAN
       
 Frequency Counter :
Frequency Counter  With Power Meter
       
 DUMMY LOAD :
       
Attenuator
       

4426 (update 21-12-2016)

 

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