Pa Screen - microHAM SMORF Manual

PA screen is a DUAL sensor screen providing "phase locked", simultaneous measurements for both sensors
operating at the same frequency. This screen is available in SINGLE RADIO, SENSORS IN SERIES meter
mode.
PA screen is primarily designed to monitor input and output of the Power Amplifier, providing power reading and
reflection measurements on both input and output of the amplifier as well as its gain. However, this screen is not
limited to Power Amplifiers, it can be used for any two port RF box, and be valuable for checking phasing boxes,
power splitters or combiners providing amplitude and phase unbalance measurement.
1
2
1
2
PA screen provides four (4) user configurable measurements. Each measurement is related to the one of two
feed points (TX or ANT) individually for each sensor. In addition to configurable reflections reading, absolute
value of impedance measurement |Z| is provided.
In the rectangle box, Gain and Phase between Sensor 2 and Sensor 1 respectively are shown.
Available measurements:
FORWARD POWER
1.
FWD TX -REF
•
Peak envelope forward power minus reflected power (delivered power) at the TX feed point.
FWD ANT -REF
•
Peak envelope forward power minus reflected power (delivered power) at the ANT feed point.
FWD
•
TX
Forward power at the TX (Sensor) feed point.
FWD
•
ANT
Forward power at the ANT (Antenna) feed point.
REFLECTION
2.
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.
Same as the 2TX screen, also PA screen has a special SCREEN MENU item – LED BARS, determining which
sensor data will be used for bar graphs. Selected sensor is indicated by highlighted bar graph icon on display.
Important note for phase measurement between two sensors. It is absolutely necessary to have all sensor
cables exactly same in type and length.
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PA SCREEN

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