ADC Telecommunications DLC0802A Digivance 800 MHz 20 Watts System User Manual 75150

ADC Telecommunications Inc Digivance 800 MHz 20 Watts System 75150

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ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: OperationPage 4-6©2003, ADC Telecommunications, Inc.2.2 Verify/Download HU and RU System SoftwareThe HU’s and RU’s may require asystem software download if they are not loaded with thecurrent system software. Use the following procedure to check the version number of thesystem software and if necessary to download the current system software:1. Click on the HOST Prg Load tab and on the REMOTE Prg Load tab. The HOST PrgLoad display and the Remote Prg Load display will open within the DEMS main windowas shown in Figure 4-3.Figure 4-3. HOST and REMOTE Prg Load Displays2. Click on the HOST Select button (see Figure 4-3). The Select Control Program Filewindow will open as shown in Figure 4-4.Browse until the folder where the ControlProgram files are located is selected and the software files are displayed in the window.Click to open Select ControlProgram window for HOSTClick to start down-load to HOST. Click to start down-load to REMOTE.Click to open SelectControl Program win-dow for REMOTE. Verify software versionbefore starting download.Verify software versionbefore starting download.FCC ID: F8I-DLC0802A User Manual - Part 5
ADCP-75-150 • Preliminary Issue A • March 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 alaterversion 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 2through 4for 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 arange of –10 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 asingle HU to asingle BTS, use the followingprocedure to measure and adjust the input RF signal level at the HU:1. Connect aspectrum 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.
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: OperationPage 4-8©2003, ADC Telecommunications, Inc.2. If using aspectrum analyzer, proceed to step 3. If using apower meter, measure thecomposite signal power from the BTS and then proceed to step 5.3. Measure the RF level of asingle 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 dBmPcis the power per carrier in dBm as measured in step 3, andNis 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 6and 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 7as 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 9from 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 aCDMA system, reduce the initial result by16.23 dBmNote: If the input signal level is already within the required range of –10 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 –10 dBm.
ADCP-75-150 • Preliminary Issue A • March 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-BEXTERNALATTENUATORTRANS-MITTERSRECEIVERS0 to 30 dBATTENUATOR(HOST REV ATT)0 to 30 dBATTENUATOR(HOST FWD ATT)RF, OPTICS,AND CONTROL0 to 30 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-75-150 • Preliminary Issue A • March 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 aunique site name and site number to the HU and RU before they can beconnected to the same CAN. Use the following procedure to assign aunique 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 DEMS 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 aunique 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 aletter. 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
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 4: OperationPage 4-11©2003, ADC Telecommunications, Inc.3. Right-click on the HOST Site Number (see Figure 4-6). The Site Number pop-up screenwill open. Enter any number between 1and 24 and then click on OK to close the screenand make the changes take effect.4. Check the REMOTE Site Number field (see Figure 4-6). The REMOTE Site Numberdoes not have to be entered. When the HOST Site Number is entered, the system willautomatically enter the same number for the REMOTE Site Number.5. Right-click on the REMOTE Site Name field (see Figure 4-6). The Site Name pop-upscreen will open. Enter aunique name for the REMOTE. The name may be up to 32characters long and must not contain any spaces. The name may include numbers,punctuation, and upper or lower case letters and must always begin with aletter. Click onOK to close the screen and make the changes take effect.6. Open the Tools menu at the top of the main window and then select Refresh Catalog tomake the new Host and Remote site names appear in the View menu.2.5 Enter Host Forward AttenuationThe HU internal forward path attenuator setting determines the maximum composite outputsignal level at the STM antenna port. The appropriate attenuation value for any particularsystem is based on the number of channels the system is transporting and the level of thecomposite forward path signal input at the HU’s FORWARD RF IN port. The maximum outputpower that can be provided by the system is 40.5 dBm (11 Watts). The total forward path gainthat is provided by the system (with host and remote forward attenuators set to 0dB) is 80.5dBm. Use the following procedure to set the forward path attenuation to provide the maximumcomposite output signal level:1. Click on the HOST RF tab. The HOST RF display will open within the DEMS mainwindow as shown in Figure 4-8.2. Right-click on the Host Fwd Att section of the display (see Figure 4-8). The Host FwdAtt pop-up screen will open as shown in Figure 4-9.3. Obtain the value of the total composite input signal level as determined in step 10 ofSection 2.3.4. Determine the appropriate value to enter for the Host forward path attenuator bysubtracting the required system output level (per system design plan) from 80.5 (the totalsystem gain) and then adding the composite input signal level. The result (see samplecalculation) is the amount of attenuation required.Atten Required =80.5 –(Required System Output Power) +(Composite Input Power)5. Enter the attenuation value and click OK to close the pop-up screen and to make thechanges take effect.

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