Paradise RA 5785 User Manual download pdf (Page 31)

Operations Manual, HPA3, Mini Compact Outdoor SSPA 208143 REV - 31

3.3.1.3 Voltage, Current and Temperature Display

On the right side of the Status window there is a thermometer display that reports the present

temperature of the amplifier. See Figure 3-9, Item [3]. A 20-30°C rise above ambient

temperature is typical.

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.

3.3.1.4 Gain Adjustment

The Gain Attenuation Control is located above the Fault Condition Indicators and to the right

of the Carrier Enable status. See Figure 3-9, Item [4]. 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 by entering the value into the text box, or by clicking on the

up/down buttons.

3.3.1.5 RF Power Indicator

The RF Power indicator is the vertical meter in the central part of the Operation window. See

Figure 3-9, Item [5]. 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.

3.3.1.6 Reference Source

If the amplifier is equipped with a block up converter, the reference source will be indicated

above the fault status window. See Figure 3-9, Item [6].

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Paradise RA 5785 User Manual Page 31