ADC Telecommunications DLC1902A Digivance 1900 MHz 20 Watt System User Manual 75158

ADC Telecommunications Inc Digivance 1900 MHz 20 Watt System 75158

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ADCP-75-158 • Preliminary Issue A • June 2003 • Section 4: OperationPage 4-7© 2003, ADC Telecommunications, Inc.Figure 4-4. Select Control Program File Window3. Check the software version numbers shown in the Software Info section of the Prg Loaddisplay against the version numbers of the software files displayed in the Select ControlProgram File window. If files in the Select Control Program File window are a laterversion than those shown in the Prg Load display, proceed with the software download. Ifthe version numbers shown in the Software Info section are the same as the versionnumbers of the files in the Select Control Program File window, the software downloadis not required. 4. Select the required file to download and click on the OK button. 5. Click on the HOST Load button (see Figure 4-3) to start the download. 6. Repeat steps 2 through 4 for the REMOTE. 2.3 Determine Forward Path Input Signal LevelThe level of the composite RF input signal at the FORWARD RF IN port at the HU will varydepending on the type of BTS, the cable loss, the number of channels present, and the requiredforward path composite power. If maximum composite RF output is required, the signal level ofthe composite forward path RF signal at the HU forward path input must be adjusted to fallwithin a range of –9 to –40 dBm. If the signal level is not within this range, it must be adjustedto fall within this range through the use of an external attenuator capable of handling the BTSforward path output power. If using the Conditioning Panel or Duplexing Panel, refer to the Digivance 800 and 1900 MHzInterface Panels User Manual (ADCP-75-147) for the procedures for measuring and adjustingthe input RF signal level at the HU. If connecting a single HU to a single BTS, use the followingprocedure to measure and adjust the input RF signal level at the HU: 1. Connect a spectrum analyzer or power meter to the forward path output port of the BTS.The required signal levels and test points are shown in Figure 4-5. Note: Check the input rating of the test equipment and the output rating of the BTS. Toavoid burning out the spectrum analyzer or power meter, it may be necessary to insert a30 dB 100W (or similar) attenuator between the BTS and test equipment.FCC ID: F8I-DLC1902A
ADCP-75-158 • Preliminary Issue A • June 2003 • Section 4: OperationPage 4-8© 2003, ADC Telecommunications, Inc.2. If using a spectrum analyzer, proceed to step 3. If using a power meter, measure thecomposite signal power from the BTS and then proceed to step 5.3. Measure the RF level of a single carrier, such as the control channel, in dBm. Make surethe resolution bandwidth of the spectrum analyzer is 30 kHz. Maximum power in anychannel should not exceed 5W (+37 dB). 4. Calculate the total composite signal power from the BTS using the following formula: Ptot = Pc + 10Log N – (see Note)Where,Ptot is the total composite power in dBmPc is the power per carrier in dBm as measured in step 3, andN is the total number of channels. 5. Determine the total cable loss that is imposed by the forward path coaxial cable that linksthe BTS to the HU and also any insertion loss imposed by splitters or combiners. 6. Subtract the total cable loss and any insertion losses from the total composite powercalculated in step 4. 7. Subtract –25 (midpoint of the required range) from the value determined in step 6. Thedifference (which should be positive) equals the value of the external attenuator that isrequired to reduce the forward path signal level to fall within the required range. Thefollowing formula outlines the required calculations for steps 6 and 7: Ptot – (Cable and insertion loss) – (–25) = Value of external attenuator required8. Select an attenuator that is as close to the value calculated in step 7 as possible. Select avalue that will adjust the signal level of the composite input signal to fall within thespecified range. 9. Install the external attenuator in the coaxial cable that is connected to the FORWARD RFIN port at the HU. 10. Subtract the value of the external attenuator used in step 9 from the total composite signalpower (Ptot) and record the result. This value will be required when setting the attenuationof the HU’s internal forward attenuator. Note: If calculating the composite power for a CDMA system, reduce the initial result by16.23 dBm Note: If the input signal level is already within the required range of –9 to –40 dBm, thenno external attenuator is required. Caution: The Host Unit can be damaged if it is overdriven by the BTS. Always install anexternal protective attenuator at the Host Unit FORWARD RF IN port if the forward pathcomposite input signal level is greater than –9 dBm.
ADCP-75-158 • Preliminary Issue A • June 2003 • Section 4: OperationPage 4-9© 2003, ADC Telecommunications, Inc.Figure 4-5. Signal Levels, Test Points, and AdjustmentsINPUT SIGNAL LEVEL(-25 dBm TYPICALCOMPOSITE FORFULL POWER)HOST UNITPRIMARYANTENNALPAREMOTE UNITEXTENDED BASETRANSCEIVER STATION17000-CEXTERNALATTENUATORTRANS-MITTERSRECEIVERS0 to 31 dBATTENUATOR(HOST REV ATT)0 to 31 dBATTENUATOR(HOST FWD ATT)RF, OPTICS,AND CONTROL0 to 31 dBATTENUATOR(REMOTE FWD ATT)OPTICAL LINKRF, OPTICS,AND CONTROLDUPLEXERADJUSTMENTS TO INPUTSIGNAL LEVEL AS SET BY HOSTFORWARD PATH ATTENUATORADJUSTMENTS TO OUTPUTSIGNAL LEVEL AS SET BY HOSTREVERSE PATH ATTENUATORMAXIMUM OUTPUT SIGNALLEVEL AT STM ANTENNA PORTADJUSTMENTS TOOUTPUT SIGNAL LEVELAS SET BY THE REMOTEFORWARD ATTENUATOR
ADCP-75-158 • Preliminary Issue A • June 2003 • Section 4: OperationPage 4-10© 2003, ADC Telecommunications, Inc.2.4 Enter Site Name and Site NumberAll HU’s and RU’s are programmed with the same site name and site number. It is thereforenecessary to assign a unique site name and site number to the HU and RU before they can beconnected to the same CAN. Use the following procedure to assign a unique site name andnumber to each HU and RU system:1. Click on the HOST Config tab and on the REMOTE Config tab. The HOST Configdisplay and the REMOTE Config display will open within the EMS main window asshown in Figure 4-6. Figure 4-6. HOST and REMOTE Config Displays2. Right-click on the HOST Site Name field (see Figure 4-6). The Site Name pop-up screenwill open as shown in Figure 4-7. Enter a unique name for the HOST. The name may be upto 32 characters long and must not contain any spaces. The name may include numbers,punctuation, and upper or lower case letters and must always begin with a letter. Click onOK to close the screen and make the changes take effect. Figure 4-7. HOST Site Name Pop-Up ScreenHOST Site NumberHOST Site NameREMOTE Site Number(Entered automaticallywhen the HOST sitenumber is selected)REMOTE Site NameRight-Click on thepoint shown to openpop-up screen

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