* Available the first quater 2001 Can be terminated with 75 Ω load for 4 NT assembly.
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4 Commissioning the 7390 TS Terminal Station 4.1 Purpose The purpose of this task is to carry out: – site adjustment of the RT unit (also called RT or RT radio), – initialization and configuration of the RT unit and NT unit parameters, – checking and validation of the installed parameters before rendering the equipment operational. 4.2 Commissioning the RT unit 4.2.
.2.2 E-RIT Tool The E-RIT is used (only if RT «N»): – as an interface between the PC and the RT unit: it receives the information necessary to the initialization and programming of the RT from the PC and transmits it to the RT unit; – to implement optimal alignment of the antenna facing the Base Station. This function is provided by the Received Signal Level control system (visual and/or audible) of the E-RIT.
4.2.3 Site configuration and adjustment procedures FOR THE ASSEMBLIES DESCRIBED IN THE FOLLOWING PARAGRAPHS, CONNECT THE NT TO THE MAINS SUPPLY LAST OF ALL, ONCE ALL THE OTHER CONNECTIONS HAVE BEEN MADE BEFORE. 4.2.3.1 Configuration setting of the 7390RT parameters To carry out RT radio programming, implement FIRST the assembly shown in Figure 41 – RT «N» connector configuration setup diagram.
A ) RT «N» connector Portable computer E-RIT/PC link (tool cable) 3CC11056Axxx NT E-RIT tool mains 85 - 264 VAC 47 - 63 HZ RT «N» «N» Plug RT/E-RIT link (tool cable) I2C bus (tool cable) Coaxial cable (tool cable) or "site" cable Figure 41 – RT «N» connector configuration setup diagram Stages 1.
B) RT «F» connector Portable computer DB9 RS232 BR2 E-RIT/PC link (tool cable) 3CC11056Axxx NT E-RIT tool mains 85 - 264 VAC 47 - 63 HZ RT «F» «F» Plug RT/E-RIT link (tool cable) Coaxial cable (tool cable) or "site" cable Figure 42 – RT «F» connector configuration setup diagram Stages 1.
4.2.3.2 RT configuration (maximum distance according to a NT-RBS) The steps of RT configuration are: – geographic area, – RF gain correctio calculation, – cable gain correction for, • mono NT software ref.:1.1.2d, • two NT software ref.:1.0.9a, • 4/8 NT software ref.:1.1.2d. Geographic area Once the configuration application has been run, the radio parameters must be supplied.
In the case of the parameters being directly entered, follow the RT radio programming stages described below: • Calculate the maximum RT-RBS distance (cf. A), • Calculate the gain corrections (cf. B), Once the parameters have been entered, the configuration must be sent to the RT radio unit. Note: To ensure optimum radio link quality, define with care the parameter values in compliance with the real environmental characteristics.
Cable gain correction For the cable gain correction calculation, there are three possible scenarios depending on the installation topology: Mono NT, two NTs or Multi NTs. 1. Mono NT software ref.: 1.1.
2. Two NT software ref.: 1.0.9a Cable gain correction in the case of two NT: once the data presented in the Star screen is validated, the following screen appears: Enter the cable length to within 1.
3. 4/8 NT software ref.: 1.1.2d Cable gain correction in the case of multi NT: once the data presented in the Star screen is validated, the following screen appears: Enter the cable length to within 1.
4.2.3.3 Margin measurement (software réf. 1.1.2d) Click on this icon to display the RIT IF Power screen. – Check that the «RIT IF Frequency» in the field is correct or adjust the frequency – In case of modification, click on the «Send» button to validate the modification – Check that the «Needed Margin» = Margin x, so that x is: • Distance (RT - RBS) / Distance max.
• the E-RIT (Radio Installation Tool), • a NT, • an audio headset, • a No. 5 Allen key for M6 screw for integrated antenna, • a No. 8 Allen key for M10 screw and a 16/17 flat wrench for non integrated antenna, • the service cable kit. WARNING: DO NOT PERFORM SUCH ASSEMBLY IN STORMY CONDITIONS; THE EQUIPMENT METAL STRUCTURES MAY BE A TARGET FOR LIGHTNING To carry out RT unit antenna alignment, implement the assembly shown in Figure 43 – RT antenna fine alignment assembly diagram.
– Help for using the E-RIT • E-RIT tool received field indicator (represented in Figure 44 – Adjustment procedure using the E-RIT tool potentiometer): to the maximum received field corresponds a maximum vumeter pointer deviation; as soon as the pointer reaches its maximum stop, adjust the potentiometer to set the pointer back to its center position (these adjustments may be renewed).
2. Pointing an integrated antenna 1 2 Figure 46 – "azimuth" and "elevation" adjustment screw – Presets: • Using the Allen key, slightly untighten the "azimuth" and "elevation" screws so that the RT can move easily (marks 1 and 2, Figure 46 – "azimuth" and "elevation" adjustment screw). • Horizontally direct the RT to the Base Station using a compass if necessary. – Horizontal and vertical pointings: Using the E-RIT tool and/or the audio headset (see section Help for using the E-RIT § 4.2.3.
3. Pointing a non integrated antenna 2 4 screws azimutal tightening 3 Elevation turnbuckle 2 4 Azimutal turnbuckle 1 3 screws elevation tightening Grounding connection Figure 47 – Pole mounting 1+0 9900UXI102 – Presets: • Be sure that the three screws ¥ and the four screws ¦ are a bit slackened, just enough to allow movement of the different parts of the pole mounting. These screws must not be too much slackened, otherwise, the fine-tuning of alignment will be imperfect. Use the 10 mm Allen key.
Note: The following cases are treated for the vertical scanning (site), they are also valid for the horizontal scanning (azimuth). Case 1 (Figure 48 – Vertical scanning: case 1): only one wide maximum is found throughout the vertical scanning. Thus the RT is aligned within the ± 6° deviation range corresponding to the side lobe. Then slightly move the RT horizontally (by less than 6°) to the BS. Perform again vertical scanning.
Note: If no maximum is detected throughout vertical scanning, it means that the horizontal reception maximum is lost, the horizontal position is not located within the ± 6° deviation range. Then horizontally move the RT to the BS so that a maximum is found and vertically scan again to find one of the 3 previously described cases.
4.3 Commissioning the NT Note: To carry out the following phases of the Terminal Station commissioning, the link Base Station must be operational and its antenna correctly orientated. Considerations – Before commissioning the NT unit, complete the RT unit adjustment procedures. – No adjustment is required for commissioning the NT. – To check the voltage at the mains connector terminals, use a measuring instrument (voltmeter).
Malfunctions to the installation: The A7390 is a reliable and easy-to-install system. By following the procedures described in the documentation, no problems should occur. However, if these procedures have been poorly applied, here is a list of the possible problems that may arise. Manifestation of the problem Possible causes Solution The red NT LED is flas-hing slowly. 1 Errored NT declaration. 2 Poor connector contact. 3 Cable damaged or severed. 4 Alignment problem. 5 Incorrect RT settings.
. NT/RT Link 1 Terminal connexion 2 Power on LED 3 Ready on LED Mains 5 4 ON/OFF 6 Ground 7 Figure 51 – The NT unit 220V NT/RT Link 1 Terminal connexion 2 ON/OFF Ready on LED 4 6 Power on LED DC Input socket Ground 3 5 7 Figure 52 – The NT unit 48 Vcc NT/RT Link Power on LED 3 1 Ready on LED 4 Terminal connexion 2 Mains 5 Figure 53 – The NT Lite unit 220 Vcc 72/ 114 78 Issue 01 - March 2001 - Draft 03 3CC12423AAAA TQ BJA 01
4.4 Client terminal connections (NT unit) There are ten types of NT units: 9900 NCA 001, 9900 NGA 001 and 9900 NCE 001 2 x Eth 10bT 9900 NCA 002 2x G703: E1 for NCA001 and NGA001 T1 for NCE001 G703 X21 2 x Eth 10bt 9900 NCB 001, 9900 NGB 001 4 x ISDN/2B1Q 60V 9900 NCD 001 9900 NGA 004 2 x Eth 10bT 2 x Eth 10bt 9900 NCB 002, 9900 NGB 002 2 x G703 2 x Eth 10bT 4ISDN/4B3T-60V 2 x Eth 10bT 4.4.
OR Pin 1: Rx_Ring Pin 2: Tx_Tip Pin 3: Rx_Ring Pin 4: Rx_Tip LEMO Figure 55 – Affectation of G703 access points at NT back SHIELDED CABLES MANDATORY 4.4.3 X21 connector If the distance between DCE (NT) and DTE is too long, according to V11 norms, you can exchange pin 6 and pin 13 in order to get a phase inversion .
SHIELDED CABLES MANDATORY 4.4.5 48V connector (HE 15) 0 V / + 48 V Ground - 48 V / 0 V Figure 58 – Affectation of 48 V points 4.5 Client terminal connections (NT Lite unit) There are two types of NT units: 9900 NCF 001, 9900 NCG 001(*) 2 x Eth 10bT 1 x Eth 10bT(*) 2xG703(E1): 1xG703 E1 for NCF001 4.5.
