8 OPERATING INSTRUCTIONS
8.1
Connecting the Amplifier
The HPA-272+ has been designed with multiple levels of protection to prevent avoidable
damage to the amplifier during operation. However, Mini-Circuits’ strongly recommends that
standard operating precautions for high-power RF amplifiers be observed to reduce risk of
damage to the amplifier and connected components.
The recommended sequence for connecting the amplifier is as follows:
1)
Connect AC mains power supply
2)
Connect output load
3)
Turn on the AC power using the switch on the front panel
4)
Apply the RF input signal
8.2
Temperature and Fan Monitoring
8.2.1 Front Panel LED Indicators
The HPA-272+ features LED lights on the front panel which provide easy visual
confirmation of the internal temperature and fan status.
•
The green LED labelled “Power” indicates the unit is connected to an AC power
supply and powered on.
•
The red LED labeled “Temp” indicates an alarm that the temperature inside the
unit exceeds the maximum rating.
•
The red LED labeled “Fan” indicates a fault or mechanical blockage with the
cooling fans.
Both of the red LEDs should be off during normal operation.
Table 3: LED Indicators (Front Panel)
Name
Color
LED State
Off
On
Power
Green
Power off
Power on
Temp
Red
Normal
Alarm Shutdown
Fan
Red
Normal
Fault
AN-60-086 Rev.: A (M155654) 03/23/16 File: AN60086.doc
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