Measuring VSWR
This useful function allows to accurately measure amplifier load VSWR. To enable
VSWR measurement, press SHOW SWR button while transmitting. This mode will
persist as long as amplifier is in transmit mode. Display returns to normal operation
(power measurement) after releasing transceiver PTT button.
Actual VSWR is represented as single „moving dot”. Lowest reading is 1.20, below
this value respective LED starts blinking, indicating underrange. Highest reading is
1.90, crossing 2.00 will cause respective LED blinking, indicating overrange.
Built in VSWR meter is of good quality, compensating for detector nonlinearities,
what makes measurement result fairly independent on output power. It also offers
exceptional directivity, with residual VSWR reading in order of 1.10.
Error signalling
To signal error in amplifier operation, multifunction display bar LEDs change color
to red. Apperance of any error denies power amplifier transmit operation.
Error LED
Meaning
Amplifier reaction
HIGH SWR
Excessive VSWR (over 2.1)
detected. Typically caused by
faulty antenna.
Deny transmitting, resume
after PTT release
OVERDRIVE
Excessive input power (>7Watt)
Deny transmitting, resume
after PTT release
DC VOLTAGE
DC supply voltage out of
permissible range (10.5V to 14.8V)
Deny transmitting, resume
after PTT release and voltage
restored
HIGH TEMP
Chassis temperature over 60 ºC
Deny transmitting, resume
after cooling down
PA FAIL
Amplifier electrical failure
Deny transmitting, resume
after PTT release
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