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7.4 RF C
ONFIGURATION
7.4.1 S
C
AFETY
ONSIDERATIONS
The VSWR protection at the output of the amplifier is designed to protect the unit against
accidental operation with blocked waveguide (VSWR 3:1) at the RF output flange by causing the
unit to shutdown automatically.
WARNING
: Prolonged operation without a load at the output may cause severe bodily harm,
loss of sight, even death. Do not operate any amplifier if the RF output connector is not
connected to a load.
Please note that failure of the amplifier due to above condition will be attributed to abuse or
neglect and is not covered by our standard warranty.
7.4.2 S
RF O
ETTING
Turn on AC power to the amplifier. Provide electrical contact between:
pin H and pin R of single unit discrete interface connector J3.
The output attenuation of the amplifier will be set to the factory default setting of 0 dB or the
previous setting stored in memory.
Using the serial interface (P1): From Screen (menu) #1, use the 'F9' function key to select the
unit and then 'F8' ('Atten'). At the prompt, enter attenuation level (from 0 to 20.0 dB),
disregarding the decimal point. For example, to request 15.5 dB attenuation, enter 155. For an
attenuation level of 4.0 dB, enter 40.
7.5 S
M
ETTING
INIMUM
As each unit has a variable gain attenuation feature, the operator can set the minimum output
power value (in dBm) below which an alarm will be generated.
Using the serial interface: From Screen (menu) #1, use the 'F9' function key to select the unit
and then from Screen (menu) #3, select 'F9' ('Thresh'). At the prompt, enter minimum output
power level (from 30.0 to 50.0 dBm), disregarding the decimal point. For example, to request a
minimum output power of 30.0 dB attenuation, enter 300.
UTPUT
O
P
T
UTPUT
OWER
HRESHOLD
AWMA-C250
Page 34
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