Powerwave Technologies 5JS0042 Linear Feed-Forward Power Amplifier User Manual Part 5

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Document ID	74212
Application ID	t4GYcVoqchP/OVzrhynFnQ==
Document Description	User Manual Part 5
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	2.5kB (31279 bits)
Date Submitted	1999-12-07 00:00:00
Date Available	2000-04-06 00:00:00
Creation Date	2001-05-09 15:51:45
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2001-05-09 15:51:46
Document Title	User Manual Part 5

Section
OPERATING INSTRUCTIONS
3-1. INTRODUCTION
This section contains operating instructions for the Multicarrier Cellular Amplifier System.
3-2. LOCATION AND FUNCTION OF AMPLIFIER MODULE CONTROLS AND INDICATORS
Primary +27 Vdc power is applied to the amplifier via a 100-amp circuit breaker (ON-OFF) located
on the left side of the amplifier front panel.
The plug-in amplifier module RF control and indicators, located in the center of the amplifier front
panel between the cooling fans, are shown in figure 3-1. The status and RF control functions are
described in detail in table 3-1. The alarms are described in detail in table 3-2.
Figure 3-1. G3X-800 Series (NTL107AA) Amplifier Module Control and Indicators
044-05055 Rev. A
3-1
Table 3-1. Amplifier Module Status Indicators and RF Control
NAME
+27VDC
Indicator
+15VDC
Indicator
+5VDC Indicator
-5VDC Indicator
RF ON Switch
FUNCTION (Note: MCPA = Multicarrier Power Amplifier)
Green LED. When lit, indicates that the +27 Vdc supply is greater than
+21 Vdc and less than +31 Vdc. If the +27 Vdc indicator goes out, the
DC FAIL indicator will illuminate. This indicates that the +27 Vdc voltage dropped below +21 Vdc.
Green LED. When lit, indicates that the +15 Vdc supply is greater than
+12 Vdc and less than +17 Vdc. If the +15 Vdc indicator goes out, the
DC FAIL indicator will illuminate. This indicates that the +15 Vdc voltage dropped below +12 Vdc or increased above +17 Vdc.
Green LED. When lit, indicates that the +5 Vdc supply is greater than
+2 Vdc and less than +7 Vdc. If the +5 Vdc indicator goes out, the DC
FAIL indicator will illuminate. This indicates that the +5 Vdc voltage
dropped below +2 Vdc or increased above +7 Vdc.
Green LED. When lit, indicates that the -5 Vdc supply is greater than
-7 Vdc and less than -2 Vdc. If the -5 Vdc indicator goes out, the DC
FAIL indicator will illuminate. This indicates that the -5 Vdc voltage
dropped below -7 Vdc or increased above -2 Vdc.
Three position switch:
Off (down position) - Turns off amplifier module.
On (center position) - Normal amplifier on position.
Reset (up position) - When toggled to reset position, all the red LED
indicators will turn on one at a time in sequence followed by all the
green indicators one at a time in sequence; this will also reset the fault
latches. If the switch is held in the reset position, a microcontroller reset will occur. This will be verified by the LEDs toggling state again.
The switch is spring loaded to return to the normal ON position when
released. If a fault occurs and the MCPA is disabled, the alarms can
be cleared and the MCPA enabled by this reset position. The functions
of the switch are disabled for five seconds after a power-up condition.
044-05055 Rev. A
3-2
Table 3-2. Amplifier Module Alarm Indicators
Definition
A ‘Minor Alarm’ will flag a potential fatal problem by the LEDs and the MCPA fault will be in
evaluation. A ‘Critical Alarm’ is indicative of a fatal problem. The fault indicator will latch on and
the MCPA module will be disabled. A ‘Major Alarm’ indicates a major problem but the MCPA
module will not be disabled. Both ‘Major Alarm’ and ‘Critical Alarm’ will be sent to the host system
via J1 in the back plane of the MCPA subrack (see figures 2-1 and 2-2).
MCPA
DISABLE
SIGNAL
CONDITION
(Pin 4 in
Table 2-5)
High
Unit is manually switched off using
the front panel RF ON switch, or disabled by a serial command or auto
shutdown by an alarm condition.
Low
Any fan failure
Low
Reflected power detected at output
>25 W
High
Reflected power detected at output
>80 W longer than approx. two min.
Low
Rack controller detected MCPA output is 3 dB below that of the other
MCPA in the system.
High
Rack controller detected low power
condition for more than approx. two
minutes
Low
One of the internal DC voltages
dropped below or exceeded the safe
threshold level
High
Voltage out of range for longer than
approx. two minutes (Note 2)
Low
+27 Vdc input >31 V detected (note 3)
ALARM
CATEGORY
LED
MCPA
MODULE
LPA DISAB.
Critical
Red
Disable
Fan Fail (one)
VSWR
Major
Minor
Red
Red
Enable
Enable
VSWR
Critical
Red
Disable
Low Pwr
Minor
Red
Enable
Low Pwr
Critical
Red
Disable
DC Fail
Minor
Red
Enable
DC Fail
Critical
Red
Disable
DC Fail
(Over voltage)
DC Fail
(Over voltage)
Minor
Red
Disable
Critical
Red
Disable
High
High Temp
High Temp
Minor
Critical
Red
Red
Enable
Disable
Low
High
Loop Fail
Loop Fail
Minor
Critical
Red
Red
Enable
Disable
Low
High
Over Pwr
Critical
Red
Disable
High
+27 Vdc input >30 V for longer than
one sec. after initial detection of DC
input >31 V (Note 3)
High temperature detected
High temperature detected for longer
than two minutes
Loop failure detected
Loop failure detected longer than two
minutes
MCPA module output power >200
watts (Note 4)
Input power >5 dBm
Over Pwr
Critical
Red
Disable
High
NOTES:
1. RS-485 serial alarm will follow LED status.
2. The appropriate status LED shall turn off indicating which voltage is out of its range.
3. When overvoltage is detected:
a) MCPA shall shut down (disable)
b) Turn on red DC Fail LED
c) Set flag for DC Fail alarm
044-05055 Rev. A
3-3
4. When overpower is detected:
a) MCPA shall shut down (disable)
b) Turn on Over Pwr LED
c) Set flag for Over Pwr alarm
d) The MCPA module shall use a peak power detector to determine the overpower fault.
3-3. INITIAL START-UP AND OPERATING PROCEDURES
Each amplifier module has two operating controls, both located on the front face of the module:
the power ON - OFF switch and the RF ON - ON/OFF/RESET switch. To perform the initial startup, proceed as follows:
1. Double check to ensure 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 amplifier
NOTE
The output coaxial cable between the amplifier and the antenna must
be 50 ohm coaxial cable. Use of any other cable will distort the output.
2. Verify that all amplifier front panel switches are in the OFF position.
3. Turn on supply that provides +27 Vdc to the amplifier system. Do not apply an RF
signal to the amplifier system
4. One at a time, place the ON - OFF circuit breaker on each amplifier in the ON position. Visually check the indicators on each amplifier module, and verify that the following indicators are on:
a. LPA DISAB. indicator (red) should be on.
b. The +27VDC, +15VDC, +5VDC and -5VDC indicators (green) on the amplifier module should be on.
5. Set both RF ON switches to the ON (center) position. All red LEDs should turn off
after six seconds.
6. Turn on external exciter/transceiver and apply RF input signals.
7. The MCPA system is designed to:
a) Adjust the gain automatically to achieve the target output power during the initialization phase of the MCPA system in a cellsite. This will be done by an operator
using a portable PC interfacing with the MCPA system with any number of radios
transmitting.
b) After achieving the target power upon the completion of the initialization, the
MCPA system will limit the power to a maximum of +0.7 dB above the available
power (Pmax). The available power with one module in the shelf is 100 watts. The
available power with two modules in the shelf is 200 watts. The APC shall not
engage until the output power has exceeded the threshold power (Pmax +0.4 dB).
At this time an APC alarm will be declared. Note the gain will NOT be adjusted
continuously after the initialization phase is complete.
If the MCPA system is driven such that the VVA runs out of dynamic range, then the
MCPA will shut down immediately causing the ENABLE alarm to be activated as well as
the critical alarm.
044-05055 Rev. A
3-4

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