RF POWER
1.
Connect the SWR-3 “TRANS” connector to the transmitter output, and “ANT” to antenna connector.
2.
Set the slide switch (SWR, PWR) at POWER position, and set the range slide switch (FWD, REF) to either 10 watts
or 100 watts position, whichever is suitable.
3.
When the transmitter switch is on, the meter needle will deflect. Read the amount of deflection on the top scale.
If the range switch had been set to the 100 watt range, the value is multiplied by 10.
4.
For accurate power reading the SWR-3 should be used in circuits having SWR value of up to 1.5. The meter
accurately will decrease if the SWR value exceeds 1.5.
5.
Always have the meter switched off when removing this meter from the circuit.
6.
NEVER disconnect the “ANT” connector when transmitting. The abnormal voltage generated may damage the
transmitter.
IN CIRCUIT MONITORING
The SWR-3 can be left continuously in the circuit for monitoring transmitter output up to 100 watts. Set the slide switch
to “SWR” and “FWD”. Adjust the knob for a meter swing to about midscale with the transmitter on. Any abnormal
variation in the transmitting system will be detected quickly. The instrument consumes almost no power for this
purpose.
FIELD STRENGTH INDICATIONS
This instrument is designed so that comparative RF field strength can be determined.
A pair of diodes has been inserted in the circuit to rectify the RF energy picked up by the small antenna. Remove the
instrument from the transmitter output circuit and restore the former transmitter antenna connections.
1.
Set the slide switch to “SWR” and “FWD”
2.
Fasten the bar antenna to the stud on the side of the case.
3.
Bring the SWR-3 in the vicinity of the transmitter of antenna system with the transmitter in operation. Be careful
that the pickup antenna does not come in contact with any metallic portion of the transmitter or antenna.
4.
The adjusting knob is rotated to obtain a convenient reading on the meter.
5.
After the aforementioned steps have been taken, any adjustments performed on the transmitter or antenna will
be reflected by an increase of decrease in the meter reading.
Ver.20130522
