AMERITRON AWM-20 Manuel de démarrage rapide - Page 2

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AMERITRON AWM-20 Manuel de démarrage rapide
FORWARD POWER MEASUREMENT
1.
Set the FUNCTION switch to the 'FWD' position.
2.
Set the radio transceiver to transmit and read the scale corresponding to the Power
range selected (30W, 300W, or 3 KW)
3.
When the AVG/PEP button is 'out' the meter reads average RF power. When the
AVG/PEP button is depressed the meter reads Peak Envelope Power for use with SSB
and AM transmissions. In this mode there will be a slow rise and decay time.
REFLECTED POWER MEASUREMENT
1.
Set the FUNCTION switch to the 'REF' position.
2.
Set the radio transceiver to transmit and read the scale corresponding to the Power
range selected (30W, 300W, or 3 KW)
3.
When the AVG/PEP button is 'out' the meter reads average RF power. When the
AVG/PEP button is depressed the meter reads Peak Envelope Power for use with SSB
and AM transmissions. In this mode there will be a slow rise and decay time.
VSWR MEASUREMENT
1.
Set the FUNCTION switch to the 'SWR SET' position.
2.
Set the radio transceiver to transmit mode.
3.
Slowly turn the "SWR SET" Contol Knob clockwise until the meter point is at the
'CAL t ' position. This should be full scale.
4.
Set the FUNCTION switch to the 'SWR' position while transmitting. The meter will
now indicate the SWR ratio.
CAUTION
1.
Since the meter movement is very sensitive, avoid excess ive vibration or mechanical
shock to the unit.
2.
The absolute maximum power that should be applied to the meter is 3KW. Also
observe maximum power inputs of 30W and 300W when unsing the lower two ranges.
3.
The transceiver and antenna connections to the meter must never be reversed.
Always observe the correct connections to the transmitter and the antenna as
indicated on the back panel and in this Instruction Manual.
4.
The meter has been carefully calibrated at the factory. Tampering with any of the
internal circuitry or sensors may cause damage and will degrade the accuracy of the
meter.
5.
Do not expose the meter to excessive temperatures, high humidity, or strong magnetic
fields.
6.
Power capability (measures short -term RF power up to 3KW):
3000
2500
2000
WATTS
1500
1000
500
0
60
70
80
90
100 150 200 600
SECONDS