microHAM SMORF, Manual

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2.
REFLECTION
•
REF
TX
Reflected power at the TX (Sensor) feed point.
•
REF
ANT
Reflected power at the ANT (Antenna) feed point.
•
SWR
TX
Standing Wave Ratio at the TX (Sensor) feed point.
•
SWR
ANT
Standing Wave Ratio at the ANT (Antenna) feed point.
•
RL
TX
Return Loss [dB] at the TX (Sensor) feed point.
•
RL
ANT
Return Loss [dB] at the ANT (Antenna) feed point.
PSK SCREEN
PSK screen is the specialized screen for PSK operating mode enthusiasts. It supports PSK in all speeds (31, 63,
128, 250, 500) providing numerical readout of IMD products together with waveform and spectrum displays.
Scope display shows vertically auto-ranged RF waveform monitor for fixed horizontal time, optimized for PSK
speed. Spectrum display shows relative level of fundamental frequency and first three, odd order harmonics of
the PSK signal in decibels as a difference to fundamental component. Level of these harmonics has main impact
to the output signal purity. They are shown dimmed when their level is too low to be certain for IMD quantification
(below dynamic range).
All measurements on this screen are related to the TX feed point. Forward power is fixed in Watt [W] units, type
is adjustable. Reflections (1) can be set to SWR or REF power. Reflected power unit is fixed to Watt [W], using
same type as forward power.
IMD and spectrum display is updated during IDLE cycles of the PSK transmission, during data transfer IMD
measurement gets dimmed and spectrum display cleared. Below the scope display, verbally evaluated quality of
the PSK signal (Q:) is located, for users not very familiar with IMD figures.
PSK screen has special SCREEN MENU setting for the PSK speed. It can be set to AUTO detection or one of
available speeds (31.5, 63, 128 …). When speed is set to AUTO, update rate of IMD values has half the rate.
If you like PSK mode and you are interested in having clean signal, this screen will help you to adjust your driving
level.
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