SF20
SURECOM SF-20 20W POWER METER w/ FREQUENCY COUNTER  
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.
 
 
Specifications:
POWER METER Specifications:
MAX. Power in
20 WATT
Build-in Dummy Load 
50Ω  20W
RF Power in Range 
100-525MHz 
input resistance  
50Ω 
measurable 
0.2 ~20W
 
FREQUENCY COUNTER
Frequency counter Range
20.000MHz~999.99MHz
Build-in : 
 Detect RF input 
Antenna in :
 SMA male antenna
Display
20.000-999.99MHz
 
Features Specifications:
Work temperature
-20℃~+60℃
Battery Build -in
Li-ion Battery  
Size(with OUT BNC /SMA)
 25*25*87 (mm)
SIZE ( with BNC/SMA socket)
 25*25*115 (mm)
Power  in
 5V (micro usb)
Weight
94g
 
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