This is a warning that the transmitter may be stressed. Most modern transceivers and linear amplifiers
have built-in high SWR protection. For those that do not, the meter provides alarm contacts. To the right of
the SWR reading is an indication of the band in use.
Using the meter to adjust an antenna matching unit
The normal display screen could be used to adjust a matching unit while observing the SWR reading.
However this display is rather slow to respond, so a special tuning screen is provided. To toggle between
the normal screen and the tuning screen, briefly push the button located on the front panel to the right of
the display. An example of the tuning screen is shown below.
Power and SWR can still be read on the upper line, but the second line is a bar graph representing the
SWR. The matching unit should be adjusted to shrink the bar towards the left hand side of the display. At a
perfect 1.00:1 the bar will completely disappear. When the best match has been found, another
momentary push of the button will restore the normal screen. The alarm function is suspended while the
tuning screen is in use.
Operating using CW, AM, Data, and SSB
The meter will automatically recognise CW, AM, Data and SSB signals. It will read the carrier level of a tune
signal, data signal or CW signal. It will read the PEP power of an SSB signal. It will read the carrier power of
an AM signal when unmodulated and the PEP power of a modulated AM signal. When a PEP measurement
is being made, an asterisk is inserted after the word “Power” in the first line. The meter makes
measurements at the rate of two thousand readings per second. It finds and displays the highest peaks. Do
not be surprised if your 100 watt transceiver produces a reading of 120 W PEP or more, especially at the
beginning of a transmission when the ALC is adjusting.
Operating with QRP rigs
The meter will read power down to 10 mW. It will start to measure SWR at power levels as low as 50mW.
As such, it is ideal to use with the many QRP rigs and kits available.
Operating on MF and LF
The meter covers the 630m and 2200m bands with accuracy. Note that the power limitation on the 2200m
band is reduced to 100 Watts maximum and 500 Watts on 630m. Operating at higher power levels may
cause the voltage transformer to overheat. The meter can be safely operated at 2000 watts on the HF
bands
