Paradise 205486 REV F - Manual (Page 40)

40 208495 REV C Operations Manual, HPA2, Compact Outdoor SSPA
3.4.1.3 Voltage, Current and Temperature Display
On the right side of the Status window there is a thermometer
display that reports the present baseplate temperature of the
amplifier. The baseplate temperature typically experiences a
20-30 degree rise above ambient on the highest power Compact
Outdoor amplifiers and 15-20 degree rise on lower power units.
To the left of the thermometer display are several indicators that
show various operating conditions of the Compact Outdoor Amplifier
in real time. These indicators are helpful for any diagnostic
procedures and consist of:
•
Power Supply Voltage monitor
•
SSPA DC Current monitor
•
Regulator Voltage monitor
•
Gate Voltage monitor
The Power Supply voltage indicator displays the primary 12 volt power supply output. SSPA
DC Current is the total current drawn by the microwave transistors. Regulator Voltage is the
DC voltage of the drain circuitry that feeds the GaAs transistors. The Gate Voltage indicator
monitors the DC voltage of the gate circuitry of the microwave GaAs transistors. These
indicators provide direct access to the active device operating characteristics.
3.4.1.4 Gain Adjustment
The Gain Attenuation Control is located above the Fault Condition Indicators and to the right
of the Carrier Enable status. The gain can be adjusted by setting the Attenuation Control. An
Attenuation Control of 0 dB is the maximum gain (75 dB) setting on the amplifier. By setting
the Attenuation Control to 20 dB; the gain is set to (55 dB). The Attenuation Control can be
varied using the control knob or the forward/reverse buttons.
Note the illuminated PC Control button inside the Attenuation Control frame. This control
allows the gain adjustment function to be assigned to the analog input voltage (J4-Pin A). The
gain adjustment control must be either under PC control or analog voltage control; it cannot
be both.
3.4.1.5 RF Power Indicator
The RF Power indicator is the vertical meter in the central part of the Operation window. This
indicator reports the approximate output power of the amplifier. It uses the voltage from the
RF Power Detector to determine a corresponding power level in dBm. The accuracy of the
power indicator is ±1 dB at the mid-point of the specified band, with a single CW or QPSK
carrier.