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SA-250 antenna analyzer designed for testing, checking, tuning or repairing antennas and antenna feed lines.Mainly, these are S.W.R. (Standing Wave Ratio) and impedance measurement instruments (vector impedance analyzers).Easy-to use measurement modes. make SURECOM attractive for professionals and hobbyists. It is important that graphical display of various parameters over a wide frequency range is a key feature of these analyzer which significantly reduces the time required to adjust an antenna.　

Main Features: 
       ■   2.2 ” precision LCD screen,High-lumen LCD brightness,  easy to read in direct sunlight
       ■   Heavy duty Aluminum enclosure,strong anti-interference ability.
       ■   Very compact and convenient for field use
       ■   Built-in rechargeable Li-ion battery
       ■   Full Band control (No need select Band )
       ■   Easy setup, only four control buttons with convenient on-screen  soft menus
       ■   Constant Battery Status Indicator and Auto Shut-off
       ■   Built-in timer shows elapsed time when unit is turned on
       ■   High efficiency IC, low power consumption, the longest working hours
       ■   More choice measurement frequency Span .
       ■   One button quick scan mode (V1,V2,U) or 3 band by full screen.
       ■   Auto marker the Best s.w.r. level reference 

Power Source: Built-in 3.7V, 900-mAh ,Size 14500 of Lithium battery.
Charge Controller: Smart charger, LED charging-status indicator
Voltage Monitor: On-screen DVM, plus battery condition icon
Charger Source: Any USB port, analyzer accepts Micro-USB plug
Power Savers: Auto-off timer, Auto Run/Stop RF generator control Interface
RF Connector: SMA-female , (optional PL-259 ,N connector need adapter)
Battery Charge Connector: Micro-USB
Screen: 2.2 inch high-output color TFT
Function Keys : 4 button, with on-screen (soft-menu) identifiers
Tuning: Rotary encoder with press-in tuning-step choice
 
Weight and Dimensions
Case: Aluminum metal 
Size: 2.8" wide x 4.0" high x 1.0" deep (7 cm x12  x 2.5 cm)
​Weight: 6.1 oz (0.172 kg)

SA-250 How to Use

1.0 Turn on and Turn off the power
Turn on the power, Press and hold White botton when the dot disappear from left up angle ,. top Menu appeared on the screen.
Turn off the power, You have 2 method :
a) On Top Menu page ,Press and hold the White [F1 ] botton 5 second .
b) On Top Menu page , Rotary encoder on "Power off", Press the [F2 Enter]

1.1Function Select (Please see Pic.1)
You can turn the knob select you want function and press [F2.Enter] botton

2.0 ANTENNA TEST EXAMPLES (Scan mode): (Please see Pic.2)
In the Top Menu screen: Rotary encoder on "Scan", Press the [F2 Scan] to frequency mode measurement button, enter Scan­ (scan mode) screen.
Press [F.2 scan ],button to start the scan operation. During scanning, in order to ensure measurement accuracy, each frequency will stay for short while.
one scanning cycle will take about 1-2 seconds. Once SCAN is done, it will enter ”Present” mode (result) screen
You have results on the screen : Show the SWR curve only (because default setting SWR curve only , Zx curve, Rs curve, jx curve Disable)
You can Enable other curve on the screen: On Top Menu page, Rotary encoder on "Zx", Press the [F2 Enter] to enable . (Please see Pic.1)
Other cure will Disable when Power Off , If want enable in the future, Rotary encoder on "Save", Press the [F2 Enter] to save setting .(Please see Pic.1)

2.1 Move the curso marker: (Please see Pic.3)
View the scan frequency point on the curve on each scan of the specific parameters of the measurement results.
Press the [F3.View ] button to start the view operation mode. rotary encoder ,the white triangle curve marker is move
Dot scale will display on screen, Press bottom change the Dot scale,You have 3 options of Dot scale mode for choose, [Dot =x1][Dot =x10][Dot= x25] .
SWR Full scale will display on screen,Press bottom change the graphically plot SWR,You have 3 options scale mode for choose, [SWR=x2 ][SWR= x 0.5][SWR=x1] .

2.2 Quick 1 start Scan mode: (Please see Pic.4)
Quick view the scan frequency point on the curve on each scan
Press the button [Quick 1 ] to start the Quick 1 operation mode .You have 3 options scan mode for choose .
Press the button [F1 Scan V1 ] . 132 to 174 MHZ can of the specific parameters of the measurement results.
Press the button [F1 Scan V2 ]. 200 to 260 MHZ can of the specific parameters of the measurement results.
Press the button [F1 Scan U ] . 400 to 519 MHZ can of the specific parameters of the measurement results.

2.3 Quick 2 start Scan mode: (Please see Pic.5)
Quick view the Full band scan frequency point on the curve on each scan
Press the [Q2 ] button to start the Quick 2 operation scan mode.
Press the [ScanFull ] button to start the 3 BAND (132-174,200-260,400-519MHz )Scan operation mode. the measurement results. after you have 2 options
mode for choose .
Press the [Scan2 Mk ] button to read the best SWR Yellow triangle curve marker .( operation Span 108MHz)
Press the [MoveCur ] button ,Nearby the best SWR Yellow triangle curve marker, Move right hand side .Press again move left hand side.

3.0 ANTENNA TEST EXAMPLES (Single mode): (Please see Pic.7)

In the Top Menu screen: Rotary encoder on "Single", Press botton "F2" single ­frequency mode measurement button, enter single­ (single scan mode) screen.
a) Rotary encoder potentiometer enter the center frequency, the specific reference to the above operation "SCAN" sweep measurement mode descriptions.
b) Press the ”F2 scan", to start the scan for one time .
Single ­frequency mode provides a single frequency impedance measurement, the measured frequency of the basic parameters are displayed on the screen. And
to indicate the form of bars and numbers displayed on the screen quickly.
The scanning one time , will stop, until you press the F2 Scan button or rotary encoder potentiometer enter the center frequency.
In this mode, it can be used as an accurate signal generator, please refer to RF out.

PACKAGE CONTAIN:

1 x SURECOM SA250 (ENGLISH VERSION) Colour Graphic Antenna Analyzer
1 x English User"s Manual
1 x Mirco Usb Charger Cable
1 x AC Adapter 100-240V (Depends on your country)
1x SMA- SO239 adaptor
1x SMA to BNC Adaptor
1x SMA to SMA adaptor

The SURECOM SF-103 hand-held frequency counter is a more practical counter, even advanced features such as field strength measurement are incorporated. It is compact, truly pocket sized, test instrument designed for ease of use and dependable performance. Supplied as a complete with internal Li-ion battery pack, AC wall charger and antenna.

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 for 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.
• GUI Battery level

Feature & Specification:

•    Frequency range two select : 2MHz-200MHz / 27MHz -2800MHz
•   CTCSS/DCS Decoder 
•    Frequency counter Digital mode for DMR radio
•     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

1.1 Power On/Off:
Power on ,press and Hold down the [Red key] by 3 second
Power off ,press and Hold down the [Red key] by 3 second of number count down to 0

1.2 Charging the battery :
Plug the power cord into adaptor , micro usb connect SF103
The Led indicating: *The RED light Charging * The Green light is Full

1.3 Setup the frequency Range :
Press[ F2.stop ] button ,[F3 -->] select function to "Rang"
Press the [F4 Ent] Select 27M-2.8G(27MHz-2800MHz) /<=200MHz (below 200MHz) ,
and then press[F2] to Run

1.4 Setup the time Gate :
Press[ F2.stop ] button ,[F3 ---> ] select Function to "Gate"
Press the [F4 Ent] select : 0.1s / 0.25s / 0.5s / 1.0s ,and then press [F2] to Run

1.5 Setup the Frequency counter digi :
Press[ F2 ] botton ,[F3--->] select Function to "Gate"
Press[F4 Ent] Select : 3 / 4 / 5 / 6 , and then press [F2] to Run
! 27MHz-2.8GHz for 3 / 4 only , 2-200MHz for 3 / 4 / 5 / 6 , Detail Please see Table 1:

1.6 How to check Frequency of Digital DMR Radio
Press[ F2 ] botton ,[F3 --->] select Function to" type" :Press [F4] select Analog / Digital(DMR) ,
and then Press [F2] to Run
!Note. Digital mode have 3 Decimal only.

1.7 How to ADJ. the Frequency mode of 27MHz -2.8GHz: ( See PIC.2)
Press, [F3 MENU ] , [F3 Down] / [ F4 Up] to select the Gate to (0.1s/0.25s/0.5s/1.0s)
Press, [F2 Edit] / [F3 - ] and [ F4 +] to select the +/- 99
Press, [F1. Main] exit , and then press [F4 save] for save the setting .([F1] not save for exit)

1.8 How to fine tune the Frequency mode of 2-200MHz: (See PIC.1 )
Tune the PCB VR1 (Variable resistance)
(The factory has been set accurate, such as non-technical staff do not tune)

1.9 How to use [F3 menu ] mode: (see PIC2)
Press, [F3 - ] / [ F4 +] select the function ,and then press [F2 edit] for edit mode ,
Press, [F3 - ] / [ F4 +] selecy for change the data .
Press, [F1. Main] exit , and then press [F4 save] for save the setting .([F1] not save for exit)

Caution:
1)Max. direct input signal 5Vp-p
2)Prohibit direct access to the radio antenna output, resulting in damage to the frequency meter

Frequency Display Resolution / CTCSS ,DCS Decode frequency range

How to check CTCSS/DCS code
1.Radio must be 132-173 / 200-260MHz / 400-519MHz
2.Radio must be ANALOG

CTCSS/DCS Decoder for ANALOG mode

CDCSS for ANALOG mode (N code only)

Specifications for FREQUENCY SF401/SF103

Package include:
1 x SF-103 frequency counter
1 x DUAL BAND UHF / VHF antenna
1 x BELT CLIP
1 x USB CHARGER with cable .
1 x ENGLISH MANUAL

SF-401PLUS

New ver 4.0 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  

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

CDCSS for ANALOG mode (N code only)

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　

Features: 
1) Power readout directly in digital form without any calibration. 
2) Maximum measurable power range up to 20W. 
3) Check your Radio power output watt radio frequency under a second.
4) Easy connection with handheld Radio 

Specifications: 
Measurable power range: 0.1-20W 
Maximum power input: 20W
0-10W  (Measuring can not be continue for more than a minute )
10W-20W (Measuring can not be continue for more than a 30 second )
20W or more  (Measuring can not be continue for more than a 5 second  )

Caution :

RF power over 20W may damage the 50 Ω dummy load.

Metal body is heated while working.

Features function

Hold the red button for only 2 seconds then let go
Hold red button -" Power on " and "Frequency counter "mode
Push red button -" Power Meter "mode
Push red button -" Signal Level "mode
Push red button -" Battery Level "mode

1.1) How to use Frequency counter .
Two ways to use the frequency counter meter : 

A) Connect walkie-talkies with BNC

B) Receive radio signals from the top sma antenna

Hold red button --" Power on " and "Frequency counter "mode

Connect the antenna to sma .

20.000MHz to 999.999 MHz

1.2) How to use Power meter .
Hold red button -switch on
Push red button once to mode "POWER "
Connect the BNC to the radio output .

1.3) How to use signal input level .
Hold red button -switch on
Push red button twice to mode "receive "
Connect the antenna to sma.

1.4) How to check Battery level .
Hold red button -switch on
Push red button 3 times to mode "BAT "

Package Contents 

1x SF-20 POWER METER / FREQUENCY COUNTER
1x English User Manual
1x USB charger cable 
1x USB AC adapter 100-240V