Automated Acceptance Test Procedures – All–inclusive TX & RX
Introduction
The Automated Acceptance Test Procedure (ATP) allows Cellular Field
Engineers (CFEs) to run automated acceptance tests on all equipped BTS
subsystem devices using the Local Maintenance Facility (LMF) and
supported test equipment per the current Cell Site Data File (CDF)
assignment.
The results of these tests (at the option of the operator) are written to a
file that can be printed. All tests are controlled from the LMF platform
using the GPIB interface, therefore, only recommended test equipment
supported by the LMF can be used.
This chapter describes the tests run from the GUI environment, which is
the recommended method. The GUI provides the advantages of
simplifying the LMF user interface, reducing the potential for miskeying
commmands and associated parameters, and speeding up the execution
of complex operations involving multiple command strings. If you feel
the command line interface (CLI) will provide additional insight into the
progress of ATPs and problems that could possibly be encountered, refer
to LMF CLI Commands, R15.X (68P09251A59).
4
IMPORTANT
*
Customer requirements determine which ATP tests to are to be
performed, and the craftsperson selects the appropriate ATP tests to run.
The tests can be run individually or as one of the following groups:
Before performing any tests, use an editor to view the
“CAVEATS” section of the “readme.txt” file in the c:\wlmf
folder for any applicable information.
The ATP test is to be performed on out-of-service (OOS)
sectors only.
DO NOT substitute test equipment not supported by the
LMF.
NOTE
Refer to Chapter 3 for detailed information on test set
connections for calibrating equipment, cables and other test
set components, if required.
All TX: TX tests verify the performance of the BTS transmit line up.
These include the GLI, MCC, BBX, and CIO cards, the LPAs and
passive components including splitters, combiners, bandpass filters,
and RF cables.
All RX: RX tests verify the performance of the BTS receiver line up.
These include the MPC (for starter frames), EMPC (for expansion
frames), CIO, BBX, MCC, and GLI cards and the passive components
including RX filters (starter frame only), and RF cables.
. . . continued on next page
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
4-1
Automated Acceptance Test Procedure – All–inclusive TX & RX – continued
All TX/RX: Executes all the TX and RX tests.
Full Optimization: Executes the TX calibration, downloads the BLO,
and executes the TX audit before running all of the TX and RX tests.
ATP Test Prerequisites
Before attempting to run any ATP tests, ensure the following have been
completed:
BTS has been optimized and calibrated (see Chapter 3).
LMF is logged into the BTS.
CSMs, GLIs, BBXs, MCCs, and TSU (if the RFDS is installed) have
correct code load and data load.
4
Primary CSM, GLI, and MCCs are INS_ACT.
BBXs are calibrated and BLOs are downloaded.
BBXs are OOS_RAM.
Test cables are calibrated.
Test equipment is connected for ATP tests (see Figure 3-13 through
Figure 3-16 starting on page 3-50).
Test equipment has been warmed up 60 minutes and calibrated.
GPIB is on.
WARNING
Before performing the FER, be sure that all LPAs are
turned OFF (circuit breakers pulled) or that all transmitter
ports are properly terminated.
All transmit ports must be properly terminated for all ATP
tests.
Failure to observe these warnings may result in bodily
injury or equipment damage.
TX OUT Connection
4-2
IMPORTANT
*
SCt4812T CDMA BTS Optimization/ATP
Many of the acceptance test procedures require taking
measurements at the TX OUT (BTS/RFDS) connector. At
sites without RFDS installed, all measurements will be via
the BTS TX OUT connector. At sites with RFDS installed,
all measurements will be via the RFDS directional coupler
TX OUT connector.
DRAFT
Mar 2001
Automated Acceptance Test Procedure – All–inclusive TX & RX – continued
ATP Test Procedure
There are three different ATP testing options that can be performed to
completely test a BTS. Depending on your requirements, one of the
following ATP testing options should be run.
ATP Testing Option 1
– All TX/RX
ATP Testing Option 2
– All TX
– All RX
ATP Testing Option 3
– TX Mask Test
– Rho Test
– Pilot Time Offset Test
– Code Domain Power Test
– FER Test
NOTE
4
The Full Optimization test can be run if you want the TX
path calibrated before all the TX and RX tests are run.
IMPORTANT
*
Follow the procedure in Table 4-1 to perform any ATP test.
Table 4-1: ATP Test Procedure
StepAction
1Select the device(s) to be tested.
If manual testing has been performed with the HP analyzer,
remove the manual control/system memory card from the
card slot and set the I/O Config to the Talk & Lstn mode
before starting the automated testing.
NOTE
The STOP button can be used to stop the testing process.
2From the Tests menu, select the test you want to run.
3Select the appropriate carrier(s) (carrier-bts#-sector#-carrier#) displayed in the Channels/Carrier
Mar 2001
pick list.
NOTE
To select multiple items, hold down the <Shift> or <Ctrl> key while making the selections.
. . . continued on next page
SCt4812T CDMA BTS Optimization/ATP
DRAFT
4-3
Automated Acceptance Test Procedure – All–inclusive TX & RX – continued
Table 4-1: ATP Test Procedure
ActionStep
4Enter the appropriate channel number in the Carrier n Channels box.
The default channel number displayed is determined by the CdmaChans[n] number in the
cbsc–n.cdf file for the BTS.
5Click on the OK button.
The status report window and a Directions pop-up are displayed.
6Follow the cable connection directions as they are displayed.
The test results are displayed in the status report window.
7Click on Save Results or Dismiss.
NOTE
4
If Dismiss is used, the test results will not be saved in the test report file.
4-4
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
TX Output Acceptance Tests: Introduction
Individual Acceptance Tests
The following individual tests can be used to verify the results of
specific tests.
Spectral Purity TX Mask (Primary & Redundant BBX)
This test verifies that the transmitted CDMA carrier waveform generated
on each sector meets the transmit spectral mask specification with
respect to the assigned CDF file values.
Waveform Quality (rho)
This test verifies that the transmitted Pilot channel element digital
waveform quality (rho) exceeds the minimum specified value in
ANSI–J_STD–019. “Rho” represents the correlation between actual and
perfect CDMA modulation spectrum. A rho value of 1.0000 represents
100% (or perfect correlation).
4
Pilot Time Offset
The Pilot Time Offset is the difference between the CDMA analyzer
measurement interval (based on the BTS system time reference) and the
incoming block of transmitted data from the BTS (Pilot only, Pilot
Gain = 262, PN Offset = 0).
Code Domain Power (Primary & Redundant BBX)
This test verifies the code domain power levels, which have been set for
all ODD numbered Walsh channels, using the OCNS command. This is
done by verifying that the ratio of PILOT divided by OCNS is equal to
10.2 $ 2 dB, and, that the noise floor of all EVEN numbered “OFF”
Walsh channels measures
channel power).
Frame Error Rate
The Frame Error Rate (FER) test verifies RX operation of the entire
CDMA Reverse Link using all equipped MCCs assigned to all
respective sector/antennas. This test verifies the BTS sensitivity on all
traffic channel elements currently configured on all equipped MCCs at
an RF input level of –119 dBm (or –116 dBm if using TMPC).
v –27 dB (with respect to total CDMA
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
4-5
TX Spectral Purity T ransmit Mask Acceptance Test
Tx Mask Test
This test verifies the spectral purity of each BBX carrier keyed up at a
specific frequency, per the current CDF file assignment. All tests are
performed using the external calibrated test set, controlled by the same
command. All measurements are via the appropriate TX OUT
(BTS/RFDS) connector.
The Pilot Gain is set to 541 for each antenna, and all channel elements
from the MCCs are forward-link disabled. The BBX is keyed up, using
both bbxlvl and bay level offsets, to generate a CDMA carrier (with pilot
channel element only). BBX power output is set to obtain +40 dBm as
measured at the TX OUT connector (on either the BTS or RFDS
4
directional coupler).
NOTE
TX output power is set to +40 dBm by setting BTS power
level to +33.5 dBm to compensate for 6.5 dB increase from
pilot gain set to 541.
The calibrated communications test set measures and returns the
attenuation level of all spurious and IM products in a 30 kHz resolution
bandwidth. With respect to the mean power of the CDMA channel
measured in a 1.23 MHz bandwidth in dB, verify that results meet
system tolerances at the following test points:
1.7/1.9 GHz:
– at least –45 dB @ + 900 kHz from center frequency
– at least –45 dB @ – 900 kHz from center frequency
800 MHz:
– at least –45 dB @ + 750 kHz from center frequency
– at least –45 dB @ – 750 kHz from center frequency
– at least –60 dB @ – 1980 kHz from center frequency
– at least –60 dB @ – 1980 kHz from center frequency
The BBX then de-keys, and, if selected, the MCC is re-configured to
assign the applicable redundant BBX to the current TX antenna path
under test. The test is then repeated.
4-6
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
TX Spectral Purity T ransmit Mask Acceptance Test– continued
Attenuation level of all
spurious and IM products
with respect to the mean
power of the CDMA channel
FW00282
4
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
4-7
TX Waveform Quality (rho) Acceptance Test
Rho Test
This test verifies the transmitted Pilot channel element digital waveform
quality of each BBX carrier keyed up at a specific frequency per thecurrent CDF file assignment. All tests are performed using the external
calibrated test set controlled by the same command. All measurements
are via the appropriate TX OUT (BTS/RFDS) connector.
The Pilot Gain is set to 262 for each antenna, and all channel elements
from the MCCs are forward link disabled. The BBX is keyed up using
both bbxlvl and bay level offsets, to generate a CDMA carrier (with pilot
channel element only, Walsh code 0). BBX power output is set to
40 dBm as measured at the TX OUT connector (on either the BTS or
4
RFDS directional coupler).
The calibrated communications test set measures and returns the Pilot
channel element digital waveform quality (rho) in dB, verifying that the
result meets system tolerances:
Waveform quality (rho) should be > 0.912 (–0.4 dB).
The BBX then de-keys and, if selected, the MCC is re-configured to
assign the applicable redundant BBX to the current TX antenna path
under test. The test is then be repeated.
4-8
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
TX Pilot Time Offset Acceptance Test
Pilot Offset Acceptance Test
This test verifies the transmitted Pilot channel element Pilot Time Offset
of each BBX carrier keyed up at a specific frequency per the currentCDF file assignment. All tests are performed using the external
calibrated test set controlled by the same command. All measurements
are via the appropriate TX OUT (BTS/RFDS) connector.
The Pilot Gain is set to 262 for each antenna, and all TCH elements from
the MCCs are forward link disabled. The BBX is keyed up, using both
bbxlvl and bay level offsets, to generate a CDMA carrier (with pilot
channel element only, Walsh code 0). BBX power output is set to
40 dBm as measured at the TX OUT connector (on either the BTS or
RFDS directional coupler).
The calibrated communications test set measures and returns the Pilot
Time Offset in µs, verifying results meet system tolerances:
Pilot Time Offset should be within < 3 µs of the target PT
Offset (0 µs).
The BBX then de-keys, and if selected, the MCC is re-configured to
assign the applicable redundant BBX to the current TX antenna path
under test. The test is then repeated.
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
4-9
TX Code Domain Power/Noise Floor Acceptance Test
Code Domain Power Test
This test verifies the Code Domain Power/Noise of each BBX carrier
keyed up at a specific frequency per the current CDF file assignment.
All tests are performed using the external calibrated test set controlled by
the same command. All measurements are via the appropriate TX OUT
(BTS/RFDS) connector.
For each sector/antenna under test, the Pilot Gain is set to 262. All MCC
channel elements under test are configured to generate Orthogonal
Channel Noise Source (OCNS) on different odd Walsh codes and to be
assigned a full–rate gain of 81. The maximum number of MCC/CEs to
be tested an any one time is 32 (32 odd Walsh codes). If more than 32
CEs exist, then multiple sets of measurements are made; so all channel
4
elements are verified on all sectors.
BBX power output is set to 40 dBm as measured at the TX OUT
connector (on either the BTS or RFDS directional coupler).
You verify the code domain power levels, which have been set for all
ODD numbered Walsh channels, using the OCNS command. This is
done by verifying that Pilot Power (dBm) minus OCNS Power (dBm) is
equal to
measures
10.2 + 2 dB and that the noise floor of all “OFF” Walsh channels
< –27 dB (with respect to total CDMA channel power).
The BBX then de-keys and, if selected, the MCC is re-configured to
assign the applicable redundant BBX to the current TX antenna path
under test. The test is then repeated. Upon completion of the test, OCNS
is disabled on the specified MCC/CE.
4-10
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
TX Code Domain Power/Noise Floor Acceptance Test– continued
Figure 4-2: Code Domain Power and Noise Floor Levels
Pilot Channel
MAX OCNS
CHANNEL
Active channels
MIN OCNS
CHANNEL
MAX NOISE
FLOOR
8.2 dB12.2 dB
PILOT LEVEL
MAX OCNS SPEC.
MIN OCNS SPEC.
MAXIMUM NOISE FLOOR:
< –27 dB SPEC.
Inactive channels
Walsh 0 1 2 3 4 5 6 7 ...64
Showing all OCNS Passing
Pilot Channel
FAILURE – EXCEEDS
MAX OCNS SPEC.
8.2 dB12.2 dB
Active channels
PILOT LEVEL
MAX OCNS SPEC.
MIN OCNS SPEC.
4
FAILURE – DOES NOT
MEET MIN OCNS SPEC.
FAILURE – EXCEEDS MAX
NOISE FLOOR SPEC.
MAXIMUM NOISE FLOOR:
< –27 dB
Inactive channels
Walsh 0 1 2 3 4 5 6 7 ...64
Indicating Failures
FW00283
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
4-11
RX Frame Error Rate (FER) Acceptance Test
FER Test
This test verifies the BTS FER on all traffic channel elements currently
configured on all equipped MCCs (full rate at 1% FER) at an RF input
level of –119 dBm [or –116 dBm if using Tower Top
Amplifier (TMPC)]. All tests are performed using the external calibrated
test set as the signal source controlled by the same command. All
measurements are via the LMF.
The Pilot Gain is set to 262 for each TX antenna, and all channel
elements from the MCCs are forward-link disabled. The BBX is keyed
up, using only bbxlvl level offsets, to generate a CDMA carrier (with
pilot channel element only). BBX power output is set to –20 dBm as
4
measured at the TX OUT connector (on either the BTS or RFDS
directional coupler). The BBX must be keyed to enable the RX receive
circuitry.
The LMF prompts the MCC/CE under test to measure all zero longcode
and provide the FER report on the selected active MCC on the reverse
link for both the main and diversity RX antenna paths, verifying that
results meet the following specification:
FER returned less than 1% and total frames measured is 1500
All MCC/CEs selected are tested on the specified RX antenna path. The
BBX then de-keys and, if selected, the MCC is re-configured to assign
the applicable redundant BBX to the current RX antenna paths under
test. The test is then repeated.
4-12
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
Generate an ATP Report
Background
ATP Report
Each time an ATP test is run, an ATP report is updated to include the
results of the most recent ATP tests if the Save Results button is used to
close the status report window. The ATP report is not updated if the
status reports window is closed using the Dismiss button.
Each time an ATP test is run, a separate report is created for each BTS
and includes the following for each test:
Test name
BBX number
Channel number
Carrier number
Sector number
Upper test limit
Lower test limit
Test result
PASS or FAIL
Description information (if applicable)
Time stamp
Details/Warning information (if applicable)
The report can be printed if the LMF computer is connected to a printer.
Follow the procedure in the Table 4-2 to view and/or print the ATP
report for a BTS.
Table 4-2: Generating an ATP Report
StepAction
1Click on the Login tab (if not in the forefront).
2Select the desired BTS from the available Base Station pick list.
4
3Click on the Report button.
4Click on a column heading to sort the report.
5– If not desiring a printable file copy, click on the Dismiss button.
Mar 2001
– If requiring a printable file copy, select the desired file type in the picklist and click on the
Perform the procedure in Table 5-1 to disconnect the test equipment and
configure the BTS for active service.
Table 5-1: External Test Equipment Removal
StepAction
1Disconnect all external test equipment from all TX and RX connectors on the top of the frame.
2Reconnect and visually inspect all TX and RX antenna feed lines at the top of the frame.
CAUTION
Verify that all sector antenna feed lines are connected to the
correct ports on the frame. Crossed antenna cables will
cause system degradation of call processing.
NOTE
Each module or device can be in any state prior to
downloading. Each module or device will be in an
OOS_RAM state after downloading has completed.
– For all LMF commands, information in italics
represents valid ranges for that command field.
– Only those fields requiring an input will be specified.
Default values for other fields will be assumed.
– For more complete command examples (including
system response details), refer to the CDMA LMF
User Guide.
5
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
5-1
DRAFT
Prepare to Leave the Site – continued
Reset All Devices
Reset all devices by cycling power before leaving the site. The
configuration data and code loads could be different from data and code
on the LMF. By resetting all devices, the CBSC can load the proper data
and code when the span is active again.
Follow the procedure in Table 5-2 as required to bring all processor
modules from the OOS to INS mode.
IMPORTANT
*
Table 5-2: Enabling Devices
StepAction
1On the LMF, select the device(s) you wish to enable.
Have the CBSC/MM bring up the site and enable all
devices at the BTS.
NOTE
5
The MGLI and CSM must be INS before an MCC can be put INS.
2Click on Device from the menu bar.
3Click on Enable from the Device menu.
A status report window is displayed.
NOTE
If a BBX2 is selected, a Transceiver Parameters window is displayed to collect keying
information.
Do not enable the BBX2.
4Click OK to close the Transceiver Parameters window.
A status report window displays the status of the device.
5-2
5Click OK to close the status report window.
The selected devices that successfully change to INS change color to green.
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
Prepare to Leave the Site – continued
Re–connect BTS T1 Spans
and Integrated Frame Modem
Before leaving the site, connect any T1 span TELCO connectors that
were removed to allow the LMF to control the BTS. Refer to Table 5-3
and Figure 5-1 as required.
Table 5-3: T1/E1 Span/IFM Connections
StepAction
1Connect the 50–pin TELCO cables to the BTS span I/O board 50–pin TELCO connectors.
2If used, connect the dial–up modem RS–232 serial cable to the Site I/O board RS–232 9–pin
sub D connector.
* IMPORTANT
Verify that you connect both SPAN cables (if removed previously), and the Integrated Frame
Modem (IFM) “TELCO” connector.
Figure 5-1: Site and Span I/O Boards T1 Span Connections
SPAN A CONNECTOR
(TELCO) INTERFACE
TO SPAN LINES
50–PIN TELCO
CONNECTORS
REMOVED
5
RS–232 9–PIN SUB D
CONNECTOR SERIAL
PORT FOR EXTERNAL
DIAL UP MODEM
CONNECTION (IF USED)
TOP of Frame
(Site I/O and Span I/O boards)
FW00299
SPAN B CONNECTOR
(TELCO) INTERFACE
TO SPAN LINES
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
5-3
DRAFT
Prepare to Leave the Site – continued
BTS Site Span Configuration
Verification
Perform the procedure in Table 5-4 to verify the current Span Framing
Format and Line Build Out (LBO) parameters. ALL MGLI2/SGLI2
boards in all C–CCP shelves that terminate a T1/E1 span should be
verified.
Table 5-4: BTS Span Parameter Configuration
StepAction
1Connect a serial cable from the LMF COM1 port (via null modem board) to the front panel of the
MGLI2 MMI port (see Figure 5-2).
2Start an MMI communication session with CSM–1 by using the Windows desktop shortcut icon (see
Table 3-5 on page 3-11).
NOTE
The LMF program must not be running when a Hyperterminal session is started if COM1 is being
used for the MMI session.
3Enter the following MMI command to display the current MGLI2/SGLI2 framing format and line
code configuration (in bold type):
5
span view <cr>
Observe a display similar to the options shown below:
COMMAND ACCEPTED: span view
The parameter in NVM is set to T1_2.
The frame format in flash is set to use T1_2.
Equalization:
Span A – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span B – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span C – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span D – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span E – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Span F – Default (0–131 feet for T1/J1, 120 Ohm for E1)
Linkspeed: Default (56K for T1 D4 AMI, 64K otherwise)
Currently, the link is running at the default rate
The actual rate is 0
NOTE
Defaults for span equalization are 0–131 feet for T1/J1 spans and 120 Ohm for E1.
Default linkspeed is 56K for T1 D4 AMI spans and 64K for all other types.
There is no need to change from defaults unless the OMC–R/CBSC span configuration requires it.
If the current MGLI2/SGLI2 framing format and line code configuration does not display the correct
choice, proceed to Table 5-5.
5-4
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
Prepare to Leave the Site – continued
Table 5-4: BTS Span Parameter Configuration
StepAction
4Repeat steps 1 through 3 for all remaining GLIs.
5Exit the GLI MMI session and HyperTerminal connection by selecting File from the connection
window menu bar, and then Exit from the dropdown menu.
Figure 5-2: MGLI2/SGLI2 MMI Port Connection
RS–232 CABLE
FROM LMF COM1
PORT
9–PIN TO 9– PIN
RS–232 CABLE
Set BTS Site Span
Configuration
NULL MODEM BOARD
(PART# 8484877P01)
MMI SERIAL PORT
GLI BOARD
5
FW00344
Perform the procedure in Table 5-5 to configure the Span Framing
Format and Line Build Out (LBO) parameters. ALL MGLI2/SGLI2
boards in all C–CCP shelves that terminate a T1/E1 span must be
configured.
Mar 2001
IMPORTANT
*
Perform the following procedure ONLY if span
configurations loaded in the MGLI2/GLI2s do not match
those in the OMCR/CBSC data base, AND ONLY when the
exact configuration data is available. Loading incorrect
span configuration data will render the site inoperable.
SCt4812T CDMA BTS Optimization/ATP
5-5
DRAFT
Prepare to Leave the Site – continued
Table 5-5: Set BTS Span Parameter Configuration
StepAction
1If not already done, connect a serial cable from the LMF COM1 port (via null modem board) to the
front panel of the MGLI2 MMI port (see Figure 5-2).
2Start an MMI communication session with CSM–1 by using the Windows desktop shortcut icon (see
Table 3-5 on page 3-11).
NOTE
The LMF program must not be running when a Hyperterminal session is started if COM1 is being
used for the MMI session.
3If required only, enter the following MMI command for each span line to set the BTS span parameters
to match that of the physical spans a – f run to the site:
span_config <option#1> <option#2> <option#3> <option#4> <option#5>
option#1 = the span to change (a – f)
option#2 = the span type (0 – 8):
Make sure that spans a – f are set to the same span type and link speed. The equalization may be
different for each individual span.
After executing the span_config command, the affected MGLI2/SGLI2 board MUST be reset and
re–loaded for changes to take effect.
Although defaults are shown, always consult site specific documentation for span type and rate used at
the site.
4Press the RESET button on the GLI2 for changes to take effect.
5This completes the site specific BTS Span setup for this GLI. Move the MMI cable to the next SGLI2
and repeat steps 1 and 4 for ALL MGLI2/SGLI2 boards.
6Terminate the Hyperterm session and disconnect the LMF from the MGLI/SGLI.
Updating CBSC LMF Files
Updated calibration (CAL) file information must be moved from the
LMF Windows environment back to the CBSC, which resides in a Unix
environment. The procedures that follow detail how to move files from
one environment to the other.
5
Backup CAL Data to a Diskette
The BLO calibration files should be backed up to a diskette (per BTS).
Follow the procedure in Table 5-6 to copy CAL files from a CDMA
LMF computer to a diskette.
Table 5-6: Backup CAL Data to a Diskette
StepAction
1Insert a diskette into the LMF A drive.
NOTE
If your diskette has not been formatted, format it using Windows. The diskette must be DOS
formatted before copying any files. Consult your Windows/DOS documentation or on–line help
on how to format diskettes.
2Click on the Start button and launch the Windows Explorer program from the Programs menu.
3Click on your C: drive.
4Double Click on the wlmf folder.
5Double Click on the CDMA folder.
6Click on the bts–# folder for the calibration file you want to copy.
7Drag the BTS–#.cal file to the 3–1/2 floppy (A:) icon on the top left of the screen and release the
mouse button.
8Repeat steps 6 and 7 until you have copied each file desired.
9Close the Windows Explorer program by selecting Close from the File menu option.
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
5-7
DRAFT
Prepare to Leave the Site – continued
LMF Removal
CAUTION
DO NOT power down the LMF without performing the
procedure indicated below. Corrupted/lost data files may
result, and in some cases, the LMF may lock up.
Follow the procedure in Table 5-7 to terminate the LMF session and
remove the terminal.
Table 5-7: LMF Termination and Removal
StepAction
1From the CDMA window select File>Exit.
2From the Windows Task Bar click Start>Shutdown.
Click Yes when the Shut Down Windows message appears.
3Disconnect the LMF terminal Ethernet connector from the BTS cabinet.
5
4Disconnect the LMF serial port, the RS-232 to GPIB interface box, and the GPIB cables as
required for equipment transport.
Copying CAL Files from Diskette to the CBSC
Follow the procedure in Table 5-8 to copy CAL files from a diskette to
the CBSC.
Table 5-8: Procedures to Copy CAL Files from Diskette to the CBSC
StepAction
1Login to the CBSC on the workstation using your account name and password.
NOTE
Enter the information that appears in bold text.
2Place your diskette containing CAL file(s) in the CBSC workstation diskette drive.
3Type eject –q and press the <Enter> key.
4Type mount and press the <Enter> key.
Verify that floppy/no_name is displayed.
NOTE
If the eject command has been previously entered, floppy/no_name will be appended with a
number
. Use the explicit floppy/no_name reference displayed.
5-8
5Enter cd /floppy/no_name and press the <Enter> key.
6Enter ls –lia and press the <Enter> key.
Verify that the bts–#.cal file is on the diskette.
7Enter cd and press the <Enter> key.
SCt4812T CDMA BTS Optimization/ATP
. . . continued on next page
Mar 2001
DRAFT
Prepare to Leave the Site – continued
Table 5-8: Procedures to Copy CAL Files from Diskette to the CBSC
ActionStep
8Enter pwd and press the <Enter> key.
Verify that you are in your home directory (/home/<name>).
9Enter dos2unix/floppy/no_name/bts–#.calbts–#.cal and press the <Enter> key (where # is the
BTS number).
10Enter ls –l *.cal and press the <Enter> key.
Verify that the CAL file was successfully copied.
11Type eject and press the <Enter> key.
12Remove the diskette from the workstation.
Re–establish OMC–R Control/
Verifying T1/E1
*
IMPORTANT
5
After all activities at the site have been completed, and
after disconnecting the LMF, place a phone call to the
OMC–R and request the BTS be placed under control of
the OMC–R.
The information in this section addresses some of the scenarios likely to
be encountered by Cellular Field Engineering (CFE) team members.
This troubleshooting guide was created as an interim reference document
for use in the field. It provides basic “what to do if” basic
troubleshooting suggestions when the BTS equipment does not perform
per the procedure documented in the manual.
Comments are consolidated from inputs provided by CFEs in the field
and information gained form experience in Motorola labs and
classrooms.
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
6-1
DRAFT
Troubleshooting: Installation
Cannot Log into Cell-Site
Follow the procedure in Table 6-1 to troubleshoot a login failure.
1If MGLI2 LED is solid RED, it implies a hardware failure. Reset MGLI2 by re-seating it. If this
persists, install a known good MGLI2 card in MGLI2 slot and retry. A Red LED may also indicate
no Ethernet termination at top of frame.
2Verify that T1 is disconnected (see Table 3-1 on page 3-4).
If T1 is still connected, verify the CBSC has disabled the BTS.
3Try pinging the MGLI2 (see Table 3-6 on page 3-15).
4Verify the LMF is connected to the Primary LMF port (LAN A) in the front of the BTS (see
Table 3-2 on page 3-5).
5Verify the LMF was configured properly (see Preparing the LMF section starting on page 3–6).
6Verify the BTS-LMF cable is RG-58 [flexible black cable of less than 76 cm (2.5 feet) length].
7Verify the Ethernet ports are terminated properly (see Figure 3-4 on page 3-14).
8Verify a T-adapter is not used on the LMF side port if connected to the BTS front LMF primary
port.
9Try connecting to the I/O panel (top of frame). Use BNC T-adapters at the LMF port for this
6
Cannot Communicate to
Power Meter
StepAction
connection.
10Re-boot the LMF and retry.
11Re-seat the MGLI2 and retry.
12Verify IP addresses are configured properly.
Follow the procedure in Table 6-2 to troubleshoot a power meter
communication failure.
Table 6-2: Troubleshooting a Power Meter Communication Failure
1Verify the Power Meter is connected to the LMF with a GPIB adapter.
6-2
2Verify the cable setup as specified in Chapter 3.
3Verify the GPIB address of the Power Meter is set to 13.
4Verify the GPIB adapter DIP switch settings are correct.
Refer to the Test Equipment setup section for details.
SCt4812T CDMA BTS Optimization/ATP
. . . continued on next page
DRAFT
Mar 2001
Troubleshooting: Installation– continued
Table 6-2: Troubleshooting a Power Meter Communication Failure
ActionStep
5Verify the GPIB adapter is not locked up. Under normal conditions, only two green LEDs must be
‘ON’ (Power and Ready). If any other LED is continuously ‘ON’, then power-cycle the GPIB Box
and retry.
6Verify that the Com1 port is not used by another application.
7Verify that the communications analyzer is in Talk&Listen, not Control mode.
Cannot Communicate to
Communications Analyzer
Follow the procedure in Table 6-3 to troubleshoot a communications
analyzer communication failure.
Table 6-3: Troubleshooting a Communications Analyzer Communication Failure
StepAction
1Verify the analyzer is connected to the LMF with GPIB adapter.
2Verify the cable setup.
3Verify the GPIB address is set to 18.
4Verify the GPIB adapter DIP switch settings are correct.
Refer to the Test Equipment setup section starting on page 3–34 for details.
5Verify the GPIB adapter is not locked up. Under normal conditions, only 2 green LEDs must be
‘ON’ (Power and Ready). If any other LED is continuously ‘ON’, then power-cycle the GPIB Box
and retry.
6Verify that the Com1 port is not used by another application.
7If a Hyperterm window is open for MMI, close it.
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
6-3
Troubleshooting: Download
Cannot Download CODE to
Any Device (card)
Follow the procedure in Table 6-4 to troubleshoot a code download
failure.
Table 6-4: Troubleshooting Code Download Failure
StepAction
1Verify T1 is disconnected from the BTS.
2Verify the LMF can communicate with the BTS device using the Status function.
3Communication to the MGLI2 must first be established before trying to talk to any other BTS
device.
The MGLI2 must be INS_ACT state (green).
4Verify the card is physically present in the cage and powered-up.
5If the card LED is solid RED, it implies hardware failure.
Reset the card by re-seating it.
If the LED remains solid red, replace with a card from another slot & retry.
NOTE
The card can only be replaced by a card of the same type.
6Re-seat the card and try again.
7If BBX reports a failure message and is OOS_RAM, the code load was OK.
6
8If the download portion completes and the reset portion fails, reset the device by selecting the
device and Reset.
Cannot Download DATA to
Any Device (Card)
Perform the procedure in Table 6-5 to troubleshoot a data download
failure.
Table 6-5: Troubleshooting Data Download Failure
StepAction
1Re-seat the card and repeat code and data load procedure.
6-4
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
Troubleshooting: Download – continued
Cannot ENABLE Device
Before a device can be enabled (placed in-service), it must be in the
OOS_RAM state (yellow) with data downloaded to the device. The color
of the device changes to green once it is enabled.
The three states that devices can be changed to are as follows:
1Re-seat the card and repeat the code and data load procedure.
2If the CSM cannot be enabled, verify the CDF file has correct latitude and longitude data for cell
site location and GPS sync.
3Ensure the primary CSM is in INS_ACT state.
NOTE
MCCs will not go INS without the CSM being INS.
4Verify the 19.6608 MHz CSM clock; MCCs will not go INS otherwise.
5The BBX should not be enabled for ATP tests.
6If MCCs give “invalid or no system time”, verify the CSM is operable.
Miscellaneous Errors
Perform the procedure in Table 6-7 to troubleshoot miscellaneous
failures.
Table 6-7: Miscellaneous Failures
StepAction
1If LPAs continue to give alarms, even after cycling power at the circuit breakers, then connect an
MMI cable to the LPA and set up a Hyperterminal connection (see Table 3-5 on page 3-11).
2Enter ALARMS in the Hyperterminal window.
The resulting LMF display may provide an indication of the problem.
(Call Field Support for further assistance.)
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
6-5
Troubleshooting: Calibration
Bay Level Offset Calibration
Failure
Perform the procedure in Table 6-8 to troubleshoot a BLO calibration
failure.
1Verify the Power Meter is configured correctly (see the test equipment setup section in Chapter 3)
and connection is made to the proper TX port.
2Verify the parameters in the bts–#.cdf file are set correctly for the following bands:
For 1900 MHz:
Bandclass=1; Freq_Band=16; SSType=16
For 800 MHz:
Bandclass=0; Freq_Band=8; SSType=8
For 1700 MHz:
Bandclass=4; Freq_Band=128; SSType=16
3Verify that no LPA in the sector is in alarm state (flashing red LED).
Reset the LPA by pulling the circuit breaker and, after 5 seconds, pushing back in.
4Re-calibrate the Power Meter and verify it is calibrated correctly with cal factors from the sensor
head.
5Verify the GPIB adapter is not locked up.
6
Under normal conditions, only two green LEDs must be ‘ON’ (Power and Ready).
If any other LED is continuously ‘ON’, power-cycle (turn power off and on) the GPIB Box and
retry.
6Verify the sensor head is functioning properly by checking it with the 1 mW (0 dBm) Power Ref
signal.
7If communication between the LMF and Power Meter is operational, the Meter display will show
“RES”.
6-6
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
Troubleshooting: Calibration – continued
Cannot Load BLO
For Load BLO failures see Table 6-7.
Calibration Audit Failure
Follow the procedure in Table 6-9 to troubleshoot a calibration audit
failure.
1Verify the Power Meter is configured correctly (refer to the test equipment setup section of
Chapter 3).
2Re-calibrate the Power Meter and verify it is calibrated correctly with cal factors from the sensor
head.
3Verify that no LPA is in alarm state (rapidly flashing red LED).
Reset the LPA by pulling the circuit breaker and, after 5 seconds, pushing back in.
4Verify that no sensor head is functioning properly by checking it with the 1 mW (0 dBm) Power
Ref signal.
5After calibration, the BLO data must be re-loaded to the BBXs before auditing.
Click on the BBX(s) and select Device>Download BLO.
Re-try the audit.
6Verify the GPIB adapter is not locked up.
Under normal conditions, only two green LEDs must be “ON” (Power and Ready).
If any other LED is continuously “ON”, power-cycle (turn power off and on) the GPIB Box and
retry.
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
6-7
Troubleshooting: Transmit ATP
Cannot Perform TX Mask
Measurement
Follow the procedure in Table 6-10 to troubleshoot a TX mask
measurement failure.
1Verify that TX audit passes for the BBX(s).
2If performing manual measurement, verify analyzer setup.
3Verify that no LPA in the sector is in alarm state (flashing red LED).
Re-set the LPA by pulling the circuit breaker and, after 5 seconds, pushing it back in.
Cannot Perform Rho or Pilot
Time Offset Measurement
Follow the procedure in Table 6-11 to troubleshoot a rho or pilot time
offset measurement failure.
Table 6-11: Troubleshooting Rho and Pilot Time Offset Measurement Failure
StepAction
1Verify presence of RF signal by switching to spectrum analyzer screen.
6
2Verify PN offsets displayed on the analyzer is the same as the PN offset in the CDF file.
3Re–load BBX data and repeat the test.
4If performing manual measurement, verify analyzer setup.
5Verify that no LPA in the sector is in alarm state (flashing red LED). Reset the LPA by pulling the
circuit breaker and, after 5 seconds, pushing back in.
6If Rho value is unstable and varies considerably (e.g. .95,.92,.93), this may indicate that the GPS
is still phasing (i.e., trying to reach and maintain 0 freq. error).
Go to the freq. bar in the upper right corner of the Rho meter and select Hz. Press <Shift–avg>
and enter 10, to obtain an average Rho value. This is an indication the GPS has not stabilized
before going INS and may need to be re-initialized.
6-8
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
Troubleshooting – T ransmit ATP – continued
Cannot Perform Code Domain
Power and Noise Floor
Measurement
Perform the procedure in Table 6-12 to troubleshoot a code domain and
noise floor measurement failure.
Table 6-12: Troubleshooting Code Domain Power and Noise Floor Measurement Failure
StepAction
1Verify presence of RF signal by switching to spectrum analyzer screen.
2Verify PN offset displayed on analyzer is same as PN offset being used in the CDF file.
3Disable and re-enable MCC (one or more MCCs based on extent of failure).
Cannot Perform Carrier
Measurement
Perform the procedure in Table 6-13 to troubleshoot a carrier
measurement failure.
1Perform the test manually, using the spread CDMA signal.
2Verify High Stability 10 MHz Rubidium Standard is warmed up (60 minutes) and properly
connected to test set-up.
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
DRAFT
6-9
Troubleshooting: Receive ATP
Multi–FER Test Failure
Perform the procedure in Table 6-14 to troubleshoot a Multi–FER
failure.
Table 6-14: Troubleshooting Multi-FER Failure
StepAction
1Verify the test equipment set up is correct for an FER test.
2Verify the test equipment is locked to 19.6608 and even second clocks.
On the HP8921A test set, the yellow LED (REF UNLOCK) must be OFF.
3Verify the MCCs have been loaded with data and are INS–ACT.
4Disable and re-enable the MCC (one or more based on extent of failure).
5Disable, re-load code and data, and re-enable the MCC (one or more MCCs based on extent of
failure).
6Verify the antenna connections to frame are correct based on the directions messages.
6
6-10
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
Troubleshooting: CSM Checklist
Problem Description
Many of the Clock Synchronization Manager (CSM) board failures may
be resolved in the field before sending the boards to the factory for
repair. This section describes known CSM problems identified in field
returns, some of which are field-repairable. Check these problems before
returning suspect CSM boards.
If having any problems with CSM board kit numbers, SGLN1145 or
SGLN4132, check the suffix with the kit number. If the kit has version
“AB”, then replace with version “BC” or higher, and return model “AB”
to the repair center.
No GPS Reference Source
Check the CSM boards for proper hardware configuration. CSM kit
SGLN1145, in Slot l, has an on-board GPS receiver; while kit
SGLN4132, in Slot 2, does not have a GPS receiver. Any incorrectly
configured board must be returned to the repair center. Do not attempt tochange hardware configuration in the field. Also, verify the GPS
antenna is not damaged and is installed per recommended guidelines.
Checksum Failure
GPS Bad RX Message Type
CSM Reference Source
Configuration Error
CSM Kit
No.
Hardware
Configuration
The CSM could have corrupted data in its firmware resulting in a
non-executable code. The problem is usually caused by either electrical
disturbance or interruption of data during a download. Attempt another
download with no interruptions in the data transfer. Return the CSM
board back to the repair center if the attempt to reload fails.
This problem is believed to be caused by a later version of CSM
software (3.5 or higher) being downloaded, via LMF, followed by an
earlier version of CSM software (3.4 or lower), being downloaded from
the CBSC. Download again with CSM software code 3.5 or higher.
Return the CSM board back to the repair center if the attempt to reload
fails.
This problem is caused by incorrect reference source configuration
performed in the field by software download. CSM kits SGLN1145 and
SGLN4132 must have proper reference sources configured (as shown
below) to function correctly.
CSM Slot
No.
Reference Source
Configuration
CDF Value
6
SGLN1145With GPS Receiver1Primary = Local GPS
Backup = Either LFR or HSO
SGLN4132Without GPS Receiver2Primary = Remote GPS
Backup = Either LFR or HSO
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
0
2 or 18
1
2 or 18
6-11
DRAFT
Troubleshooting: CSM Checklist – continued
Takes Too Long for CSM to
Come INS
This problem may be caused by a delay in GPS acquisition. Check the
accuracy flag status and/or current position. Refer to the GSM system
time/GPS and LFR/HSO verification section in Chapter 3. At least one
satellite should be visible and tracked for the “surveyed” mode and four
satellites should be visible and tracked for the “estimated” mode. Also,
verify correct base site position data used in “surveyed” mode.
6
6-12
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
C–CCP Backplane Troubleshooting
Introduction
The C–CCP backplane is a multi–layer board that interconnects all the
C–CCP modules. The complexity of this board lends itself to possible
improper diagnoses when problems occur.
Connector Functionality
The following connector overview describes the major types of
backplane connectors along with the functionality of each. This
information allows the CFE to:
Determine which connector(s) is associated with a specific problem
type.
Isolate problems to a specific cable or connector.
Primary “A” and Redundant “B” Inter Shelf Bus Connectors
The 40 pin Inter Shelf Bus (ISB) connectors provide an interface bus
from the master GLI2 to all other GLI2s in the modem frame. Their
basic function is to provide clock synchronization from the master GLI2
to all other GLI2s in the frame.
The ISB also provides the following functions:
Span line grooming when a single span is used for multiple cages.
MMI connection to/from the master GLI2 to cell site modem.
Interface between GLI2s and the AMR (for reporting BTS alarms).
Span Line Connector
The span line input is an 8–pin RJ–45 connector that provides a primary
and secondary (if used) span line interface to each GLI2 in the C–CCP
shelf. The span line is used for MM/EMX switch control of the Master
GLI2 and also all the BBX traffic.
Primary “A” and Redundant “B” Reference Distribution
Module Input/Output
The Reference Distribution Module (RDM) connectors route the 3 MHz
reference signals from the CSMs to the GLI2s and all BBXs in the
backplane. The signals are used to phase lock loop all clock circuits on
the GLI2s and BBX boards to produce precise clock and signal
frequencies.
Power Input (Return A, B, and C connectors)
6
Mar 2001
Provides a +27 volt or –48 volt input for use by the power supply
modules.
. . . continued on next page
SCt4812T CDMA BTS Optimization/ATP
DRAFT
6-13
C–CCP Backplane Troubleshooting – continued
Power Supply Module Interface
Each power supply module has a series of three different connectors to
provide the needed inputs/outputs to the C–CCP backplane. These
include a VCC/Ground input connector, a Harting style multiple pin
interface, and a +15 V/Analog Ground output connector. The C–CCP
Power Modules convert +27 or –48 Volts to a regulated +15, +6.5, and
+5.0 Volts to be used by the C–CCP shelf cards. In the –48 V BTS, the
LPA power modules convert –48 Volts to a regulated +27 Volts.
GLI2 Connector
This connector consists of a Harting 4SU digital connector and a
6–conductor coaxial connector for RDM distribution. The connectors
provide inputs/outputs for the GLI2s in the C–CCP backplane.
GLI2 Ethernet “A” and “B” Connections
These BNC connectors are located on the C–CCP backplane and routed
to the GLI2 board. This interface provides all the control and data
communications between the master GLI2 and the other GLI2, between
gateways, and for the LMF on the LAN.
BBX Connector
Each BBX connector consists of a Harting 2SU/1SU digital connector
and two 6–conductor coaxial connectors. These connectors provide DC,
digital, and RF inputs/outputs for the BBXs in the C–CCP backplane.
6
CIO Connectors
RX RF antenna path signal inputs are routed through RX Tri–Filters
(on the I/O plate), and via coaxial cables to the two MPC modules –
the six “A” (main) signals go to one MPC; the six “B” (diversity) to
the other. The MPC outputs the low–noise–amplified signals via the
C–CCP backplane to the CIO where the signals are split and sent to
the appropriate BBX.
A digital bus then routes the baseband signal through the BBX, to the
backplane, then on to the MCC slots.
Digital TX antenna path signals originate at the MCCs. Each output
is routed from the MCC slot via the backplane appropriate BBX.
TX RF path signal originates from the BBX, through the backplane to
the CIO, through the CIO, and via multi-conductor coaxial cabling to
the LPAs in the LPA shelf.
C–CCP Backplane
Troubleshooting Procedure
6-14
Table 6-15 through Table 6-24 provide procedures for troubleshooting
problems that appear to be related to a defective C–CCP backplane. The
tables are broken down into possible problems and steps that should be
taken in an attempt to find the root cause.
. . . continued on next page
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
C–CCP Backplane Troubleshooting – continued
IMPORTANT
*
Digital Control Problems
No GLI2 Control via LMF (all GLI2s)
Follow the procedure in Table 6-15 to troubleshoot a GLI2 control via
LMF failure.
Table 6-15: No GLI2 Control via LMF (all GLI2s)
StepAction
1Check the ethernet for proper connection, damage, shorts, or opens.
2Verify the C–CCP backplane Shelf ID DIP switch is set correctly.
3Visually check the master GLI2 connector (both board and backplane) for damage.
4Replace the master GLI2 with a known good GLI2.
Table 6-15 through Table 6-24 must be completed before
replacing ANY C–CCP backplane.
No GLI2 Control through Span Line Connection (All GLI2s)
Follow the procedures in Table 6-16 and Table 6-17 to troubleshoot
GLI2 control failures.
Table 6-16: No GLI2 Control through Span Line Connection (Both GLI2s)
StepAction
1Verify the C–CCP backplane Shelf ID DIP switch is set correctly.
2Verify that the BTS and GLI2s are correctly configured in the OMCR/CBSC data base.
3Visually check the master GLI2 connector (both board and backplane) for damage.
4Replace the master GLI2 with a known good GLI2.
5Check the span line inputs from the top of the frame to the master GLI2 for proper connection and
damage.
6Check the span line configuration on the MGLI2 (see Table 5-4 on page 5-4).
Table 6-17: MGLI2 Control Good – No Control over Co–located GLI2
StepAction
1Verify that the BTS and GLI2s are correctly configured in the OMCR CBSC data base.
2Check the ethernet for proper connection, damage, shorts, or opens.
6
3Visually check all GLI2 connectors (both board and backplane) for damage.
4Replace the remaining GLI2 with a known good GLI2.
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
6-15
DRAFT
C–CCP Backplane Troubleshooting – continued
No AMR Control (MGLI2 good)
Perform the procedure in Table 6-18 to troubleshoot an AMR control
failure when the MGLI control is good.
Table 6-18: MGLI2 Control Good – No Control over AMR
StepAction
1Visually check the master GLI2 connector (both board and backplane) for damage.
2Replace the master GLI2 with a known good GLI2.
3Replace the AMR with a known good AMR.
No BBX Control in the Shelf – (No Control over Co–located
GLI2s)
Perform the procedure in Table 6-19 to troubleshoot a BBX control in
the shelf failure.
Table 6-19: No BBX Control in the Shelf – No Control over Co–located GLI2s
StepAction
1Visually check all GLI2 connectors (both board and backplane) for damage.
2Replace the remaining GLI2 with a known good GLI2.
3Visually check BBX connectors (both board and backplane) for damage.
4Replace the BBX with a known good BBX.
6
No (or Missing) Span Line Traffic
Perform the procedure in Table 6-20 to troubleshoot a span line traffic
failure.
Table 6-20: MGLI2 Control Good – No (or Missing) Span Line Traffic
StepAction
1Visually check all GLI2 connectors (both board and backplane) for damage.
2Replace the remaining GLI2 with a known good GLI2.
3Visually check all span line distribution (both connectors and cables) for damage.
4If the problem seems to be limited to one BBX, replace the MGLI2 with a known good MGLI2.
5Perform the BTS Span Parameter Configuration ( see Table 5-4 on page 5-4).
6Ensure that ISB cabling is correct.
6-16
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
C–CCP Backplane Troubleshooting – continued
No (or Missing) MCC Channel Elements
Perform the procedure in Table 6-21 to troubleshoot a channel elements
failure.
Table 6-21: No MCC Channel Elements
StepAction
1Verify CEs on a co–located MCC (MCC24 TYPE=2)
2If the problem seems to be limited to one MCC, replace the MCC with a known good MCC.
– Check connectors (both board and backplane) for damage.
3If no CEs on any MCC:
– Verify clock reference to CIO.
4Check the CDF for MCCTYPE=2 (MCC24) or MCCTYPE=0 (MCC8).
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
6-17
DRAFT
C–CCP Backplane Troubleshooting – continued
DC Power Problems
Perform the procedure in Table 6-22 to troubleshoot a DC input voltage
to power supply module failure.
WARNING
Potentially lethal voltage and current levels are routed to
the BTS equipment. This test must be carried out with a
second person present, acting in a safety role. Remove all
rings, jewelry, and wrist watches prior to beginning this
test.
No DC Input Voltage to Power Supply Module
Table 6-22: No DC Input Voltage to Power Supply Module
StepAction
1Verify DC power is applied to the BTS frame.
2Verify there are no breakers tripped.
* IMPORTANT
If a breaker has tripped, remove all modules from the applicable shelf supplied by the breaker and
attempt to reset it.
– If the breaker trips again, there is probably a cable or breaker problem within the frame.
– If the breaker does not trip, there is probably a defective module or sub–assembly within the shelf.
6
3Verify that the C–CCP shelf breaker on the BTS frame breaker panel is functional.
4Use a voltmeter to determine if the input voltage is being routed to the C–CCP backplane by
measuring the DC voltage level on the PWR_IN cable.
– If the voltage is not present, there is probably a cable or breaker problem within the frame.
– If the voltage is present at the connector, reconnect and measure the level at the “VCC” power
feed clip on the distribution backplane.
– If the voltage is correct at the power clip, inspect the clip for damage.
5If everything appears to be correct, visually inspect the power supply module connectors.
6Replace the power supply module with a known good module.
7If steps 1 through 5 fail to indicate a problem, a C–CCP backplane failure (possibly an open trace) has
occurred.
6-18
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
C–CCP Backplane Troubleshooting – continued
No DC Voltage (+5, +6.5, or +15 Volts) to a Specific GLI2,
BBX, or Switchboard
Perform the procedure in Table 6-23 to troubleshoot a DC input voltage
to GLI2, BBX, or Switchboard failure.
Table 6-23: No DC Input Voltage to any C–CCP Shelf Module
StepAction
1Verify the steps in Table 6-22 have been performed.
2Inspect the defective board/module (both board and backplane) connector for damage.
3Replace suspect board/module with known good board/module.
TX and RX Signal Routing
Problems
Perform the procedure in Table 6-24 to troubleshoot TX and RX signal
routing problems.
Table 6-24: TX and RX Signal Routing Problems
StepAction
1Inspect all Harting Cable connectors and back–plane connectors for damage in all the affected board
slots.
2Perform steps in the RF path troubleshooting flowchart in this manual.
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
6-19
DRAFT
Module Front Panel LED Indicators and Connectors
Module Status Indicators
Each of the non-passive plug-in modules has a bi-color (green & red)
LED status indicator located on the module front panel. The indicator is
labeled PWR/ALM. If both colors are turned on, the indicator is yellow.
Each plug-in module, except for the fan module, has its own alarm
(fault) detection circuitry that controls the state of the PWR/ALM LED.
The fan TACH signal of each fan module is monitored by the AMR.
Based on the status of this signal, the AMR controls the state of the
PWR/ALM LED on the fan module.
LED Status Combinations for
All Modules (except GLI2,
CSM, BBX, MCC)
PWR/ALM LED
The following list describes the states of the module status indicator.
Solid GREEN – module operating in a normal (fault free) condition.
Solid RED – module is operating in a fault (alarm) condition due to
electrical hardware failure.
Note that a fault (alarm) indication may or may not be due to a complete
module failure and normal service may or may not be reduced or
interrupted.
6
DC/DC Converter LED Status
Combinations
The PWR CNVTR has alarm (fault) detection circuitry that controls the
state of the PWR/ALM LED. This is true for both the C–CCP and LPA
power converters.
PWR/ALM LED
The following list describes the states of the bi-color LED.
Solid GREEN – module operating in a normal (fault free) condition.
Solid RED – module is operating in a fault (alarm) condition due to
electrical hardware problem.
6-20
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
Module Front Panel LED Indicators and Connectors – continued
CSM LED Status
Combinations
PWR/ALM LED
The CSMs include on-board alarm detection. Hardware and
software/firmware alarms are indicated via the front panel indicators.
After the memory tests, the CSM loads OOS–RAM code from the Flash
EPROM, if available. If not available, the OOS–ROM code is loaded
from the Flash EPROM.
Solid GREEN – module is INS_ACT or INS_STBY no alarm.
Solid RED – Initial power up or module is operating in a fault (alarm)
condition.
Slowly Flashing GREEN – OOS_ROM no alarm.
Long RED/Short GREEN – OOS_ROM alarm.
Rapidly Flashing GREEN – OOS_RAM no alarm or INS_ACT in
DUMB mode.
Short RED/Short GREEN – OOS_RAM alarm.
Long GREEN/Short RED – INS_ACT or INS_STBY alarm.
Off – no DC power or on-board fuse is open.
Solid YELLOW – After a reset, the CSMs begin to boot. During
SRAM test and Flash EPROM code check, the LED is yellow. (If
SRAM or Flash EPROM fail, the LED changes to a solid RED and
the CSM attempts to reboot.)
Figure 6-1: CSM Front Panel Indicators & Monitor Ports
6
SYNC
MONITOR
PWR/ALM
Indicator
FREQ
MONITOR
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
FW00303
. . . continued on next page
6-21
DRAFT
Module Front Panel LED Indicators and Connectors – continued
FREQ Monitor Connector
A test port provided at the CSM front panel via a BNC receptacle allows
monitoring of the 19.6608 MHz clock generated by the CSM. When
both CSM 1 and CSM 2 are in an in-service (INS) condition, the CSM 2
clock signal frequency is the same as that output by CSM 1.
The clock is a sine wave signal with a minimum amplitude of +2 dBm
(800 mVpp) into a 50 Ω load connected to this port.
SYNC Monitor Connector
A test port provided at the CSM front panel via a BNC receptacle allows
monitoring of the “Even Second Tick” reference signal generated by the
CSMs.
At this port, the reference signal is a TTL active high signal with a pulse
width of 153 nanoseconds.
MMI Connector – Only accessible behind front panel. The RS–232
MMI port connector is intended to be used primarily in the development
or factory environment, but may be used in the field for
debug/maintenance purposes.
6
6-22
SCt4812T CDMA BTS Optimization/ATP
Mar 2001
DRAFT
Module Front Panel LED Indicators and Connectors – continued
GLI2 LED Status
Combinations
The GLI2 module has indicators, controls and connectors as described
below and shown in Figure 6-2.
The operating states of the 5 LEDs are:
ACTIVE
Solid GREEN – GLI2 is active. This means that the GLI2 has shelf
control and is providing control of the digital interfaces.
Off – GLI2 is not active (i.e., Standby). The mate GLI2 should be
active.
MASTER
Solid GREEN – GLI2 is Master (sometimes referred to as MGLI2).
Off – GLI2 is non-master (i.e., Slave).
ALARM
Solid RED – GLI2 is in a fault condition or in reset.
While in reset transition, STATUS LED is OFF while GLI2 is
performing ROM boot (about 12 seconds for normal boot).
While in reset transition, STATUS LED is ON while GLI2 is
performing RAM boot (about 4 seconds for normal boot).
Off – No Alarm.
STATUS
FlashingGREEN– GLI2 is in service (INS), in a stable operating
condition.
On – GLI2 is in OOS RAM state operating downloaded code.
Off – GLI2 is in OOS ROM state operating boot code.
SPANS
Solid GREEN – Span line is connected and operating.
Solid RED – Span line is disconnected or a fault condition exists.
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
6-23
DRAFT
Module Front Panel LED Indicators and Connectors – continued
GLI2 Pushbuttons and
Connectors
RESET Pushbutton – Depressing the RESET pushbutton causes a
partial reset of the CPU and a reset of all board devices. The GLI2 is
placed in the OOS_ROM state
MMI Connector – The RS–232MMI port connector is intended to be
used primarily in the development or factory environment but may be
used in the field for debug/maintenance purposes.
LAN Connectors (A & B) – The two 10BASE2 Ethernet circuit board
mounted BNC connectors are located on the bottom front edge of the
GLI2; one for each LAN interface, A & B. Ethernet cabling is connected
to tee connectors fastened to these BNC connectors.
Figure 6-2: GLI2 Front Panel
LEDOPERATING STATUS
STATUSOFF - operating normally
ON - briefly during powerĆup when the Alarm LED turns OFF.
SLOW GREEN - when the GLI2 is INS (inĆservice)
STATUSRESETALARMSPANSMASTERMMIACTIVE
STATUS LED
RESET
PUSHBUTTON
6
ALARM LED
SPANS LED
MASTER LED
MMI POR T
CONNECTOR
ACTIVE LED
RESET
ALARMOFF - operating normally
SPANS
MASTER
MMI PORT
CONNECTOR
ACTIVE
All functions on the GLI2 are reset when pressing and releasing
the switch.
ON - briefly during powerĆup when the Alarm LED turns OFF.
SLOW GREEN - when the GLI2 is INS (inĆservice)
OFF - card is powered down, in initialization, or in standby
GREEN - operating normally
YELLOW - one or more of the equipped initialized spans is receiving
a remote alarm indication signal from the far end
RED - one or more of the equipped initialized spans is in an alarm
state
The pair of GLI2 cards include a redundant status. The card in the
top shelf is designated by hardware as the active card; the card in
the bottom shelf is in the standby mode.
ON - operating normally in active card
OFF - operating normally in standby card
An RSĆ232, serial, asynchronous communications link for use as
an MMI port. This port supports 300 baud, up to a maximum of
115,200 baud communications.
Shows the operating status of the redundant cards. The redundant
card toggles automatically if the active card is removed or fails
ON - active card operating normally
OFF - standby card operating normally
6-24
SCt4812T CDMA BTS Optimization/ATP
FW00225
Mar 2001
DRAFT
Module Front Panel LED Indicators and Connectors – continued
BBX LED Status
Combinations
PWR/ALM LED
The BBX module has its own alarm (fault) detection circuitry that
controls the state of the PWR/ALM LED.
The following list describes the states of the bi-color LED:
Solid GREEN – INS_ACT no alarm
Solid RED Red – initializing or power-up alarm
Slowly Flashing GREEN – OOS_ROM no alarm
Long RED/Short GREEN – OOS_ROM alarm
Rapidly Flashing GREEN – OOS_RAM no alarm
Short RED/Short GREEN – OOS_RAM alarm
Long GREEN/Short RED – INS_ACT alarm
MCC LED Status
Combinations
The MCC module has LED indicators and connectors as described
below (see Figure 6-3). Note that the figure does not show the
connectors as they are concealed by the removable lens.
The LED indicators and their states are as follows:
PWR/ALM LED
RED – fault on module
ACTIVE LED
Off – module is inactive, off-line, or not processing traffic.
Slowly Flashing GREEN – OOS_ROM no alarm.
Rapidly Flashing Green – OOS_RAM no alarm.
Solid GREEN – module is INS_ACT, on-line, processing traffic.
PWR/ALM and ACTIVE LEDs
Solid RED – module is powered but is in reset or the BCP is inactive.
MMI Connectors
The RS–232 MMI port connector (four-pin) is intended to be used
primarily in the development or factory environment but may be used
in the field for debugging purposes.
6
Mar 2001
The RJ–11 ethernet port connector (eight-pin) is intended to be used
primarily in the development environment but may be used in the field
for high data rate debugging purposes.
. . . continued on next page
SCt4812T CDMA BTS Optimization/ATP
DRAFT
6-25
Module Front Panel LED Indicators and Connectors– continued
Figure 6-3: MCC Front Panel
PWR/ALMACTIVE
PWR/ALM L E D
OPERATING STATUS
FW00224
ACTIVE LED
LENS
(REMOVABLE)
LED
PWR/ALM
ACTIVE
COLOR
RED
An alarm is generated in the event of a failure
GREEN
RED
OFF - operating normally
ON - briefly during powerĆup and during failure
ąconditions
RAPIDLY BLINKING - Card is codeĆloaded but
ąnot enabled
SLOW BLINKING - Card is not codeĆloaded
ON - card is codeĆloaded and enabled
ą(INS_ACTIVE)
ON - fault condition
SLOW FLASHING (alternating with green) - CHI
ąbus inactive on powerĆup
6
LPA Shelf LED Status
Combinations
LPA Module LED
6-26
Each LPA module contains a bi–color LED just above the MMI
connector on the front panel of the module. Interpret this LED as
follows:
GREEN — LPA module is active and is reporting no alarms (Normal
condition).
Flashing GREEN/RED — LPA module is active but is reporting an
low input power condition. If no BBX is keyed, this is normal and
does not constitute a failure.
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
Basic Trou b l e s h oo t i n g – Span Control Link
Span Problems (No Control
Link)
Perform the procedure in Table 6-25 to troubleshoot a control link
failure.
Table 6-25: Troubleshooting Control Link Failure
StepAction
1Verify the span settings using the span_view command on the active master GLI2 MMI port. If
these are correct, verify the edlc parameters using the
indicate that the span is not operating correctly.
– Try looping back the span line from the DSX panel back to the Mobility Manager (MM) and
verify that the looped signal is good.
– Listen for control tone on appropriate timeslot from Base Site and MM.
2If no traffic channels in groomed MCCs (or in whole C–CCP shelf) can process calls, verify that
the ISB cabling is correct and that ISB A and ISB B cables are not swapped.
show command. Any alarms conditions
6
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
6-27
DRAFT
Basic Trou b l e s h oo t i n g – Span Control Link – continued
All channel elements transmitted from a BTS in a particular 1.25 MHz
CDMA channel are orthonogonally spread by 1 of 64 possible Walsh
code functions; additionally, they are also spread by a quadrature pair of
PN sequences unique to each sector.
Overall, the mobile uses this to differentiate multiple signals transmitted
from the same BTS (and surrounding BTS) sectors, and to synchronize
to the next strongest sector.
The PN offset per sector is stored on the BBXs, where the corresponding
I & Q registers reside.
The PN offset values are determined on a per BTS/per sector(antenna)
basis as determined by the appropriate cdf file content. A breakdown of
this information is found in Table B-1.
Only the 14–chip delay is currently in use. It is important to determine
the RF chip delay to be able to test the BTS functionality. This can be
done by ascertaining if the CDF file
when the MCC was downloaded with “image data”. The
value is used to compensate for the processing delay (approximately
20 mS) in the BTS using any type of mobile meeting IS–97
specifications.
FineTxAdj value was set to “on”
FineTxAdj
B
FineTxAdj value in the cdf file is 213 (D5 HEX), FineTxAdj has
If the
been set for the 14 chip table.
IMPORTANT
*
CDF file I and Q values can be represented in DECIMAL
or HEX. If using HEX, add 0x before the HEX value. If
necessary, convert HEX values in Table B-1 to decimal
before comparing them to cdf file I & Q value assignments.
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
B-1
DRAFT
B
PN Offset Programming Information – continued
Table B-1: PnMask I and PnMask Q Values for PilotPn
Periodic maintenance of a site may also may mandate re–optimization of
specific portions of the site. An outline of some basic guidelines is
included in the following tables.
IMPORTANT
*
BTS Frame
C–CCP ShelfAll sector TX and RX paths to all
Multicoupler/
Preselector Card
Preselector I/OAll sector RX paths.
BBX boardRX and TX paths of the affected C–CCP
CIO CardAll RX and TX paths of the affected
Any LPA ModuleThe affected sector TX path.
Re–optimization steps listed for any assembly detailed in
the tables below must be performed anytime an RF cable
associated with it is replaced.
Table C-1: When RF Optimization Is required on the BTS
Item ReplacedOptimize:
Combined CDMA Channel Processor
(C–CCP) shelves.
The three or six affected sector RX paths for
the C–CCP shelf in the BTS frames.
Directional CouplerAll affected sector RX and TX paths to all
BTS frame shelves.
Site filterAll affected RX sector paths in all shelves
in all BTS frames.
Any RFDS component
or TSU.
SCt4812T CDMA BTS Optimization/ATP
The RFDS calibration RX & TX paths
(MONFWD/GENFWD).
Optimize:
. . . continued on next page
C-1
DRAFT
FRU Optimization/ATP Test Matrix – continued
Inter-frame Cabling
Optimization must be performed after the replacement of any RF cabling
between BTS frames.
Table C-2: When to Optimize Inter–frame Cabling
Item ReplacedOptimize:
C
Detailed Optimization/ATP
Test Matrix
Ancillary frame to BTS
frame (RX) cables
BTS frame to ancillary frame
(TX) cables
Table C-3 outlines in more detail the tests that would need to be
performed if one of the BTS components were to fail and be replaced. It
is also assumed that all modules are placed OOS–ROM via the LMF
until full redundancy of all applicable modules is implemented.
The following guidelines should also be noted when using this table.
IMPORTANT
*
Not every procedure required to bring the site back on line
is indicated in Table C-3. It is meant to be used as a
guideline ONLY. The table assumes that the user is familiar
enough with the BTS Optimization/ATP procedure to
understand which test equipment set ups, calibrations, and
BTS site preparation will be required before performing the
Table # procedures referenced.
The affected sector/antenna RX
paths.
The affected sector/antenna TX paths.
C-2
Various passive BTS components (such as the TX and RX directional
couplers, Preselector IO, CIO; etc.) only call for a TX or RX calibration
audit to be performed in lieu of a full path calibration. If the RX or TX
path calibration audit fails, the entire RF path calibration will need to be
repeated. If the RF path calibration fails, further troubleshooting is
warranted.
Whenever any C–CCP BACKPLANE is replaced, it is assumed that
only power to the C–CCP shelf being replaced is turned off via the
breaker supplying that shelf.
Whenever any DISTRIBUTION BACKPLANE is replaced it is assumed
that the power to the entire RFM frame is removed and the Preselector
I/O is replaced. The modem frame should be brought up as if it were a
new installation.
. . . continued on next page
SCt4812T CDMA BTS Optimization/ATP
DRAFT
Mar 2001
FRU Optimization/ATP Test Matrix – continued
NOTE
If any significant change in signal level results from any
component being replaced in the RX or TX signal flow
paths, it would be identified by re–running the RX and TX
calibration audit command.
When the CIO is replaced, the C–CCP shelf remains powered up. The
BBX boards may need to be removed, then re–installed into their
original slots, and re–downloaded (code and BLO data). RX and TX
calibration audits should then be performed.
C
. . . continued on next page
Mar 2001
SCt4812T CDMA BTS Optimization/ATP
C-3
DRAFT
C
FRU Optimization/ATP Test Matrix – continued
Table C-3: SC 4812T BTS Optimization and ATP Test Matrix
Replace power converters one card at a time so that power to the C–CCP or LPA shelf is not lost. If power to
the C–CCP shelf is lost, all cards in the shelf must be downloaded again.
Description
Initial Boards/Modules
Install, Preliminary
Operations, CDF Site
Equipage; etc.
DC Power Pre-Test
Physical Inspect
Initial Power-up
Ping the Processors
Download/Enable