User's Manual

044-05117
Table 3-1. Status Indicator Colors and Status
Control/Indicator Description
LED Color MCPA Status
Green (solid) RF enabled, Reset/On/Off switch set to
On (middle position).
Green (blinking) Standby.
Yellow (solid) Minor* alarm - APC function enabled.
Red (solid) Major* alarm – Critical fault present. If
present on only one amplifier, amplifier
replacement required. If present on all
amplifiers in a subrack, a fault exists in
the subrack or in the RF load attached
to the subrack.
STATUS (Multi-
colored LED
Indicator)
Red/Yellow
(alternating)
Downloading. Do not interrupt power.
Toggle Switch
positions
RESET (Up) Amplifier in RESET mode. LED indicates Boot mode, then turns
solid green.
On (Middle) Amplifier enabled. LED indicates solid green
Off (Down) Amplifier disabled. LED Indicates solid red.
* See Table 4-1 for an explanation of major and minor alarms.
3-2.3 RJ-11 PC Interface
The RJ-11 PC Interface connector, located on the Front Panel, is for updating the amplifier’s
firmware, and is for factory use only.
3-3 Initial Start-Up and Operating Procedures
To perform the initial start-up, proceed as follows:
1. For each Amplifier:
a. Verify that all input and output cables are properly connected.
Caution
Before applying power, make sure that the input and output of the amplifier are
properly terminated at 50 ohms. Do not operate the amplifier without a load
attached. Refer to table 1-2 for input power requirements. Excessive input
power may damage the MCPA.
Note
The amplifiers must be warmed up for a minimum of 5 minutes prior to setting power
levels. Failure to properly warm the amplifiers may result in lower output power,
once the amplifiers reach operating temperature.
b. Turn on the supply that provides +27 Vdc to the amplifier.
3-2 Installation and Service Manual - G3L-850-135 Multi-Carrier Power Amplifier