User's Manual Part 5

ManualsBrandsADC Telecommunications ManualsElectronicsDigivance WBDR Base Station

Task-Based Reference Determining RF Signal Levels

Element Management System (EMS) 4.0 User Manual

3.10 Determining RF Signal Levels

An operational host/remote pair has forward and reverse path RF signals passing

through it between the SDR BTS application and the cell phone user. The RF

signals are transported in digital format as RF spectrum data by way of fiber or

fiber-to-free-space optics links between the host unit (Host PCIx Card) and remote

unit (in both directions).

To view RF signal levels for a host/remote pair

1. From the View menu, select the site names of a host/remote pair.

2. Click on the host RF tab for the host or remote unit to view RF signal levels

and associated information for the selected unit (see Figure 33).

3. To interpret host display, see Topic 4.4.2, Host RF Window, on page 71. To

interpret remote display, see Topic 4.5.2, Remote RF Window, on page 82.

Figure 33. RF Display Example

Summary of content (9 pages)

PAGE 1
Task-Based Reference Determining RF Signal Levels 3.10 Determining RF Signal Levels An operational host/remote pair has forward and reverse path RF signals passing through it between the SDR BTS application and the cell phone user. The RF signals are transported in digital format as RF spectrum data by way of fiber or fiber-to-free-space optics links between the host unit (Host PCIx Card) and remote unit (in both directions). To view RF signal levels for a host/remote pair 1.
PAGE 2
Setting RF Forward Attenuation Section 3 To view RF signal levels using the NOC-NEM interface Use the GET DATA command (see Topic 5.5.7 on page 105). 3.11 Setting RF Forward Attenuation Using the remote unit RF window, you can adjust the current attenuation setting for the RF forward path. This setting affects the strength of the forward path RF analog signal transmitted from the remote unit antenna.
PAGE 3
Task-Based Reference Setting RF Forward Attenuation Figure 34. Attenuation Area in RF Window 4. In the Remote Fwd Att dialog, key in the desired setting as shown in the example in Figure 35. Figure 35. Entering Remote Forward Attenuation 5. When done, click on the OK button. To enter forward path attenuation values using NOC-NEM interface Use the SET THRESHOLD command (see Topic 5.5.18 on page 115). Element Management System (EMS) 4.
PAGE 4
Defining RF Logical Channels Section 3 3.12 Defining RF Logical Channels Using the host SDR Config window, shown in Figure 36, you can define a logical RF channel and enter gain settings for each path within the channel. A logical RF channel is a multiplex of up to eight RF voice channels. A logical RF channel consists of a forward path, a primary reverse path, and a secondary reverse path, if supported by the remote unit.
PAGE 5
Task-Based Reference Defining RF Logical Channels Figure 37. Modulation Type 5. Click in the FCC RF Chnl Number field and from the pulldown list select an FCC channel number as shown in the example in Figure 38. Based on modulation type, band, and sub-band, EMS will list only available FCC channel numbers. 47 Figure 38. FCC RF Chnl Number (Example) 6. Click in the Fwd RF Chnl Gain field to display a pulldown list such shown in Figure 39. Select the item for the desired gain setting for the forward path.
PAGE 6
Setting Operating Mode Section 3 7. Click in the Rev RF Chnl Gain field to display a pulldown list. Select the item for the desired amount of signal gain. The range of possible values is from 10 to −20 dBm. The standard value for this field is 0. 8. If the remote unit supports the diversity option (second reverse path), click on the Div RF Chnl Gain field to display the pulldown list. Select the item for the desired amount of signal gain. The range of possible values is from 10 to −20 dBm.
PAGE 7
Task-Based Reference Setting Operating Mode To set operating modes 1. From the Tools menu, select Opmode. 2. Click on the host or remote name. 3. For a description of the modes, refer to Topic 4.1.4 on page 60. The modes are the same for the host and remote units. CAUTION! Care is needed to prevent damage to the system in Test Mode. Test Mode causes the system to ignore alarms that would otherwise prevent RF signals from being transported. 4.
PAGE 8
Downloading Program Files Section 3 3.14 Downloading Program Files The host and remote Prg Load windows are used to download program files to a host/remote unit. The downloaded file may be either a control program or a Field Programmable Gate Array (FPGA). The file is downloaded from the EMS computer to the host/remote control board. The loaded files have file names in the following format: .sr where = program name = software version number in major.minor.rev.
PAGE 9
Task-Based Reference Downloading Program Files Table 3: Host and Remote Programs DESCRIPTION CAN DOWNLOAD? SDR HIniter Host Initialization Program version No SDR HReflsh Host Reprogram Program version No HMR HstCP Host Control Program version Yes FPGA Program Field Programmable Gate Array version Yes SDR RInter Remote Initialization Program version No SDR RReflsh Remote Reprogram Program version No HMR RemCP Remote Control Program version Yes FPGA Program Field Programmable