CHAPTER 3: INSTALLATION
OPERATING INSTRUCTIONS
4. Operating Instructions
4.1. Forward Path Amplifi er
An LED on the front of the Forward Path Amplifi er lights green when the amplifi er is operating. If no power is present at the
amplifi er the LED is off.
4.1.1. Gain Adjustment
Amplifi er gain is adjusted using the pushbuttons on the front of the amplifi er module. There are two buttons, labeled “+” and
“–” for gain increment and decrement, respectively. The “+” button increments the gain by approximately 0.5 dB and the “–”
button decrements the gain by approximately 0.5 dB. There are 20 step increments in all, which is equal to about 10 dB.
The gain will quickly scroll up or down by pressing and holding the appropriate button for a duration of approximately one
second.
NOTE:
Gain and Tilt settings are stored in the amplifi er and are not lost if a power failure occurs.
4.1.2. Tilt Adjustment
Amplifi er tilt is adjusted using the pushbuttons on the front of the amplifi er module. There are two buttons, labeled “+” and “–”
for tilt increment and decrement, respectively. The “+” button increments the tilt by approximately 0.5 dB and the “–” button
decrements the tilt by approximately 0.5 dB. There are 20 step increments in all, which is equal to about 10 dB. The tilt will
quickly scroll up or down by pressing and holding the appropriate button for a duration of approximately one second. Tilt pivot
point is set at 860 MHz, and has a linear profi le. The maximum tilt settings attenuates the signal by 10 dB at 50 MHz.
4.1.3. Monitor Test Ports
Two –20 dB directional coupler monitor test ports are standard on the adjustable gain amplifi ers, one before RF amplifi cation
and one after.
4.2. Power Supply
The power supply front panel has LEDs to indicate fan and power conditions and a test point to verify the +24 VDC. There
are three LED indicators on the power supply front panel. Refer to Table 2 for a functional description of each indicator and
the test point. The location of the indicators and test point is shown in Figure 26.
SignalOn
®
Series – Forward Path Amplifi er Products – Installation & Operation Manual
4-1
CHAPTER 4: OPERATING INSTRUCTIONS
INDICATOR
COLOR
DESCRIPTION
FAN FAIL
Green
Fan fail alarms (green to red) on fan failure. Continues to
operate (Green) if current shared with another power supply.
Red
Fan failure.
DC OUT FAIL
Green
Operating properly.
Off
No DC power output to the chassis backplane.
POWER IN FAIL
Green
Operating properly.
Off
No input power present.
24V TST PT
N/A
+24 VDC measured b and – jacks.
Table #1: Front Panel Indicators and Test Point
