SF-401PLUS

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  

MANUAL 

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SF401-SF401PLUS.jpg

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

 

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 

 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