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SURECOM SW-33 markII 125-525 Mhz Mini Digital VHF/UHF Power & SWR Meter



1 VSWR. Forward  power direct digital readout, without any calibration. 
2. Maximum measurable power range up to 100W. 
3. 3 seconds check your antenna SWR , also check your radio RF power watt.
​4.Easy to install handheld Radio 

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1 V.S.W.R. Forward / Reflected RF power direct digital readout(Ver.130 only),
without any calibration.
2. Maximum measurable power range up to 100Watt.
3. Fast check of antenna S.W.R. and Radio RF power watt in 3
seconds only
4.Easy to install handheld Radio

Measurable power range: 0.1-100 Watt
Maximum power: 100Watt Accuracy: mean + / - 5%~10%
S.W.R. measurable minimum input: 3 Watt (5 watt is best)
* Not for the D.M.R. digital radio.
1.Features function
Power On / S.W.R .Mode : Press red button
and hold 3 sec. ( first status is "S.W.R. "mode,) show >
Press red button -" FWD " RF Power mode , show >
Press red button -" REV " RF Power mode , show >
Power Off : Push red button and HOLD


2.How to Measure RF Power output from transmitter (Pic.3)
Press red button -switch on Mode S.W.R. And then press red button
again to "FWD Power " mode. Display will show:
Connect the "TX" to Radio TX output .
Connect the "ANT/50 Ohm Load" to Dummy Load
!Caution : Please use correct dummy load , High RF power output
will damage the dummy load.
* Power Watt - Testing frequency: VHF 145.000 / UHF 430.000


3. How to Measure S.W.R. from Antenna (Pic.4)
Press red button " Power on " > "S.W.R. "mode. Display will show: V
Connect the "TX" to Radio output.
Connect the "ANT/50 Ohm Load" to ANTENNA
Test Results show 1.00 to 1.50 ,
-Mean the antenna is very good for this frequency.
Test Results show 1.50 to 9.00 ,
-Mean the antenna is not good for this frequency.
Test Results show 10.0 to 19.99 ,
--Mean the antenna is very bad for this frequency.

Package Contents 

1x English User Manual
1x USB charger cable 
1x USB AC adapter 100-240 V 

Version information: 
VER.281 Production on   2017-2019   (Power on without show version )
VER. 291 Production on   2019-2020   ( Power on  show "291")
VER.130  Production on   2020-2021   ( Power on  show " 130")

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