Teledyne HPAC-2005, Operation Manual

Page: 51 / 156

3 RU SSPA Chassis Operations Manual 205356 REV T 51
The ALC has the ability to accurately control the RF output power over a 15 dB range
from P
sat
. The ALC will operate over a 20 dB range, but the accuracy of the last 5 dB
will suffer. For example, if the saturated power from the amplifier is 59 dBm, the lowest
accurate power setting during ALC control is 44 dBm.
If the output power set point is set outside the operational range of the ALC circuit, the
ALC will adjust the output power to the lowest possible level and set a minor fault on
the amplifier’s front panel.
Note
: Automatic Level Control is inactive when the system is in N+1
operation.
2.2.4.5.5 Set Level
The operator may set the detected RF Output value used as the threshold for either a
High RF or Low RF fault condition. Valid values are 0 to 80 dBm, adjustable in 1 dBm
steps.
When the amplifier is set to detect High RF faults, if the detected RF Output rises
above the set value, a fault condition is triggered.
When the amplifier is set to detect Low RF faults, if the detected RF Output falls below
the set value, a fault condition is triggered.
2.2.4.5.6 Back
This selection displays the menu listed in
Section 2.2.4.5
,