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BTS Calibrations

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Table of Contents

• Introduction to scripts

• Applying scripts

• VSWR using Anritsu Site Master

• CTU1 TX Calibration

• CTU2 TX Calibration

• Cable configuration

Command Scripts

• Scripts for TX and RX calibration are required to be added to Procom Plus to make the activity easier and less time consuming. These are list of commands for specific activities, which run automatically on a single click, and the desired output is achieved

• Scripts Location:Add the script files to the following locationC:\ Program Files\ Procom Plus\Aspect All scripts are automatically picked up from Aspect file by Procom plus software

Meta Keys

Meta Keys are user defined buttons to directly execute a script or a command

Creating single Command Key

Select a Key position

Label Key

Select Send Text

Contents

Creating script application Key

Select a Key position

Label Key

Select Run script

Script name

VSWR TEST

START CAL

SAVE SETUP

MODE FREQ-DIST AMPLITUDE

RECAL SETUP

ESCAPE/CLEAR

ENTER

MARKER

Save Display

RECAL Display

RF Out Port

ON/OFF

ANRITSU S331D

Steps to perform

• Turn on Site Master by pressing ON/OFF• Press Enter to Continue• Press RECALL SETUP and select GSM900 or DCS 1800 accordingly• Move to Level 3 and lock all DRIs of the sector in which sweep test

(VSWR) is required• Remove feeder cable from the respective DRI’s DUP and connect it with

RF OUT port of site master• Wait for 10 seconds and graphical display will appear showing the

reflection throughout cable length. • Press MARKER, select M1 and then press EDIT, now u can move the

marker through the cable length and check reflections at any desired distance

• To save a current reflection, press SAVE DISPLAY, save by site name and fault location for easy access in future

• To view a previous display, press RECALL DISPLAY

Calibrating Site Master

If site Master shows CAL OFF, calibrate as follows with the dummy load, labeled with open, short and load.

•Press Start Cal•Connect OPEN to the RF OUT port, it will show success•Now calibrate by connecting SHORT•connect LOAD with RF out port of site master

Setting GSM 900 / DCS 1800

0 H OSL SWR 0.0 - 140.0 m

1 H OSL SWR 0.0 - 145.0 m

2

3

4 H OSL SWR 1710.00 – 1880.00 MHZ

5 H OSL SWR 880.00 – 960.00 MHZ

6

7

8

Press RECALL SETUP, list of already configured setups (If any) will appear

Setting to GSM900

• Press MODE• Select FREQ-SWR and press ENTER• Press F1 and enter lower limit

Example F1 = 830.00 MHZ• Press F2 and enter upper limit

Example F2= 1000.00 MHZ (Now frequencies are set)• Press MODE again• Select DTF-SWR (DTF stands for distance to fault) press ENTER• Press D1 to enter start distance

D1= 0.0 m• Press D2 to enter end distance (estimate the length of the cable, it should

not be less)Example D2= 140 m (Now distance is set)

• To set up the amplitude, Press AMPLITUDE• Select TOP and enter limit 1.5• Now select BOTTOM and enter 1 (amplitude cannot be lesser than 1)• Finally, to save the settings, press SAVE SETUP• Check your saved settings for GSM 900 by RECALL SETUP

Setting to GSM 1800

• Press MODE• Select FREQ-SWR and press ENTER• Press F1 and enter lower limit

Example F1 = 1700.00 MHZ• Press F2 and enter upper limit

Example F2= 1900.00 MHZ (Now frequencies are set)• Press MODE again• Select DTF-SWR (DTF stands for distance to fault) press ENTER• Press D1 to enter start distance

D1= 0.0 m• Press D2 to enter end distance (estimate the length of the cable, it should

not be less)Example D2= 140 m (Now distance is set)

• To set up the amplitude, Press AMPLITUDE• Select TOP and enter limit 1.5• Now select BOTTOM and enter 1 (amplitude cannot be lesser than 1)• Finally, to save the settings, press SAVE SETUP• Check your saved settings for GSM 1800 by RECALL SETUP

Site Master

Insulation cutter

Warding FilesKnife

Open End Spanners Closed End Spanners

Adjustable SpannersCable Cutter

Tools Required (VSWR)

DRI TX Calibration

Required Tools

• Digital Power meter• Power meter Sensor with

Jumper cable and connectors• Laptop with Procom Plus and TX

scripts (CTU1 & CTU2)• MMI Cable for Procom terminal• EQCP Cable for DRI access• RSSI Cable for CTU1 clock reset

Steps to perform for CTU1

 •Login to site through MCUF•Check site id by “ disp_site ” command•State Radios by “ State <id> dri * * ”•Check alarms at site “ disp_act <id> ”•Check equipage and antenna select of radios by “ disp_eq <id> dri x y ”

TX Steps Continued…

• Move to level 3 by using “chg_l " command• Login to BSC as follows

Press Ctrl + n Write the command “ Rlogin 1 0114h “ (0114h to 0119h)Again press Ctrl + n , now you are in BSC, it can be verified by disp_site,

BSC ID is 0

• Change to level 3• Write the command “ Store <site id> “ to enable calibration data• Now write “disp_cal_data <id> dri x y “to check for “Store Calibration Data: enabled”

TX Steps Continued…

Lock the sector by the command “Lock <Site Id> dri x y, repeat the same for all DRIs of the particular sector. While locking a radio, it must be noted to lock the DRI with RTF 0 at the last. RTF 0 of each sector contains BCCH

RTF0 Sector A

RTF0 Sector B

RTF0 Sector C

TX Steps Continued…

• Remove RF cable from dup and connect Power meter sensor in between. Position of sensor should be such that the arrow should direct towards the antenna. Connect the jumper cable with power meter and turn it on

• If power meter is showing values in dbm, convert them to Watt from the front display

From Radio to Antenna

TX Steps Continued…

• Remove MMI cable and login to DRI using RSSI cable• MMI ROM> tcu_clock 0 (reset clock to zero)• Now login to DRI using EQCP cable• Run the script Alarm_Off_TX, Alternate of script is to type the following

commands EQCP> .gsmfwEQCP> testEQCP Test> bbh alarm off EQCP Test> act cEQCP Test> cspwr

• Adjust the power by giving offsets through ‘U’ and ‘D’ keys. For GSM 900, power should be 20 Watts (>=20 W & <21 W). For DCS 1800, power should be 16 Watts (>=16 W & <17 W). To increase power use key ‘U’ and to decrease power use the Key ‘D’

• After powers are adjusted, press ESC to quit

CTU1 TX Scripts

ALARM_OFF_TX script for CTU1•Press Alt+F3•Select TX•Select CTU 1•Highlight Alarm_Off_Rx and click “compile and Run”

CTU1 TX Scripts

SAVE_CAL_TX script for CTU1•Press Alt+F3•Select TX•Select CTU 1•Highlight SAVE_CAL_TX and click “compile and Run”

TX Steps Continued…

• Calibration of one radio (CTU1) is complete. Repeat the same process for all radios to be calibrated. After completing the last DRI, remove power meter from that DRI and connect back RF cable (All radios that are calibrated are still locked)

• Now login to BSC• Change level by “chg_l”• Clear calibration data of all DRIs that are calibrated by the command

Clear_cal_data <site Id> dri x y• Give hard reset to the radios (Must in CTU1)• In service all radios by command

Ins <Site ID> dri x y• TX Calibration is complete, Note that offsets increasing 6 indicates that the

particular CTU1 is faulty and may alter power again shortly. Check through “disp_cal_data <id> dri x y “command that offsets have changed, if offset value is changed, then TX calibration of that DRI is successful.

Steps to perform for CTU2

 •Login to site through MCUF•Check site id by “ disp_site ” command•State Radios by “ State <id> dri * * ”•Check alarms at site “ disp_act <id> ”•Check equipage and antenna select of radios by “ disp_eq <id> dri x y ”

Unlike CTU1, CTU2 is calibrated in unlocked state, in a double density DRI, in-service one radio and keep associated radio locked

TX Steps Continued…

• Move to level 3 by using “chg_l " command• Login to BSC as follows

Press Ctrl + n Write the command “ Rlogin 1 0114h “ (0114h to 0119h)Again press Ctrl + n , now you are in BSC, it can be verified by disp_site,

BSC ID is 0

• Change to level 3• Write the command “ Store <site id> “ to enable calibration data• Now write “disp_cal_data <id> dri x y “to check for “Store Calibration Data: enabled”

TX Steps Continued…

Lock the sector by the command “Lock <Site Id> dri x y, repeat the same for all DRIs of the particular sector. While locking a radio, it must be noted to lock the DRI with RTF 0 at the last. RTF 0 of each sector contains BCCH

RTF0 Sector A

RTF0 Sector B

RTF0 Sector C

TX Steps Continued…

• Remove RF cable from dup and connect Power meter sensor in between. Position of sensor should be such that the arrow should direct towards the antenna. Connect the jumper cable with power meter and turn it on

• If power meter is showing values in dbm, convert them to Watt from the front display

From Radio to Antenna

TX Steps Continued…

Now that the power meter is connected to the DUP, in service one radio and keep its associated radio locked, normally , in a CTU2 with two radios, the 1st one is in-serviced and the 2nd one is left locked (0 0 in-serviced and 0 1 locked)

DRI density

Associated radio

• Login to DRI using EQCP cable (no need to reset clock to 0 in case of CTU2).

• Run script TX_double or TX_single accordingly, depending weather the CTU2 is double density or single density

• Adjust the power by giving offsets through ‘U’ and ‘D’ keys. For GSM 900, power should be 20 Watts (>=20 W & <21 W). For DCS 1800, power should be 16 Watts (>=16 W & <17 W). To increase power use key ‘U’ and to decrease power use the Key ‘D’

• Press ‘Q’ to quit after power finally adjusted as above

TX Steps Continued…

CTU2 TX Scripts

To run TX_Double/TX_Single script for CTU2•Press Alt+F3 to open Aspect file window•Select TX•Select CTU2•Highlight TX_Double or TX_single, depending upon radio’s single or double density•click “compile and run”

TX Steps Continued…

• Store the calibration by command “cal_store 1”, it will show PASS after executing this command

• Login back to H2SC and get the calibrated DRI locked• Remove Power meter and connect back the RF cable• Login to BSC• Clear previous calibration data by command “clear_cal_data <Site ID>

dri x y• Check that the calibration data is cleared by “disp_cal_data <Site ID> dri

x y, It should show no calibration data• Now finally, in-service the radios

ins <ID> dri x y

Verifying successful calibrations

If the offset value is changed after Power calibration (using this command), calibration successful

If the frequencies (in hexa decimals) have changed after RX calibration, calibration successful

Cable Configurations

Connector Type

Pin Connections

DB-9(F) 1 2 3 4 5 6 7 8 9DB-9(M) NC 3 2 NC 5&7 NC NC NC NC

MMI Cable Configuration

Connector Type

Pin Connections

DB-9(F) 1 2 3 4 5 6 7 8 9DB-9(M) NC 3 2 NC 5 NC NC NC NC

EQCP Cable Configuration

Cable Configurations

Connector Type

Pin Connections

DB-9(F) 1 2 3 4 5 6 7 8 9

DB-9(M) NC 9 8 NC 5 NC NC NC NC

RSSI Cable Configuration

Thanks