MFJ MFJ-867, Manual

MFJ-868B Giant True Peak Reading SWR/Wattmeter 1.8-60 MHz 

Instruction M

4 

 
SWR Measurement Settings

1. Set 

the 

SWR/PWR 

switch to 

SWR (in)

 for standing wave ratio measurement.  

2. Set 

the 

SWR/SET

 switch to the 

SET (out)

 position in order to set the full-

scale deflection to measure SWR. (SWR/SET and REF/FWD settings share 
the same switch.) 

3.  Set the radio transceiver to transmit mode and transmit the desired power 

output. 

4.  Slowly turn the 

SWR SET

 knob 

clockwise 

towards

 MAX

 until the meter 

point is at the 

SET

 position on the SWR scale.  If the meter point goes past 

the 

SET

 position, slowly turn the 

SWR SET

 knob 

counter-clockwise 

towards

 MIN

 until the meter point is at the 

SET

 position on the SWR scale. 

5. Set 

the 

SWR/SET

 switch to the 

SWR (in)

 position while transmitting.  The 

meter will now indicate the standing wave ratio.  Note:  The 

SWR SET

 knob 

must be reset when the power level is changed.  As you increase the power, 
the knob will need to be turned

 counter-clockwise 

towards

 MIN

.  This will 

maintain an accurate SWR reading. 

 
 
SWR Measurement Scale

1. The 

MFJ-868B Giant SWR/Wattmeter

 has one standing wave ratio scale.  

Refer to Figure 2 above for scale location and scale mark representation. 

2.  On the SWR scale, each tall picket represents 0.5 units below the 2 picket and 

1 unit above the 2 picket.  

3.  The short pickets represent 0.1 units below the 2 picket and 0.5 units above 

the 2 picket.  

4.  The red shaded area represents a SWR of greater than 3:1.  It is not 

recommended to operate within this shaded area of a SWR greater than 3.0:1.