Active DCC Brochure

Abstract

Microlab's DCC500 Series products provide both local and remote monitoring and control functions to optimize system performance. At the center of the active DAS tray DCC500 series is the DAS Control Rack (DCR). The DCR is an active multi-channel device with programmable variable attenuators and RMS power monitors. The DCR provides all of the necessary components to monitor DAS power levels and adjust the variable attenuators. Access to the DCR can be made any of three ways: through the front panel keypad and LCD screen, through an Ethernet port for use with a computer/laptop, or via remote access through a modem/signal router or a site management system.
Active DCC

DCC500 Series Products       

DAS Control Rack (DCR)
A broadband active multi-channel device with programmable uplink/downlink variable attenuators and RMS power monitors for remote or local access.  Active DCC 

Model  Description 
DCC500-A01  4 channel low power Active DAS tray with power monitoring and attenuation control (+18dBm maximum average input)
DCC550-A01  4 channel power monitoring only DAS tray 
DCC560-A01
4 channel attenuation control only DAS Tray (+18 dBm maximum input)

High Power Point of Interface (HPOI)
Complimenting the DCR it attenuates and splits duplexed RF signals from base stations, repeaters, or small cells for the purpose of conditioning the signal to an active DAS head end.  Active DCC 

MODELS*
(Other Band and Band Combinations are Available)
 
Power
Input Tx
Insertion
Loss Tx 
EIA Rack
Height 
700 MHz
Upper C 
2100 MHz AWS  700 + 2100 MHz AWS 
60 W
31 dB
2 RU  DCC502-A48[C/D] [B/F]  DCC506-A48[C/D] [B/F]  DCC520-A48[C/D] [B/F] 
20 W  31 dB  1 RU  DCC502-A43[C/D] [B/F]
DCC506-A43[C/D] [B/F]
DCC520-A43[C/D] [B/F] 
5 W  21 dB  1 RU  DCC502-A37[C/D] [B/F]  DCC506-A37[C/D] [B/F]
DCC520-A37[C/D] [B/F] 
.5 W  11 dB  1 RU  DCC502-A27[C/D] [B/F]  DCC506-A27[C/D] [B/F]
DCC520-A27[C/D] [B/F]
* Add BTS connector designator to end of model #: C for 4.1 - 9.5 DIN, D for 7 - 16 DIN. Location of BTS connector is designated by B for back or F for front panel

Spectrum Analyzer
A stand-alone multi-channel spectrum measurement and analysis unit for remote or local monitoring in a 1RU, 19” rack mountable tray.  Active DCC 

Model  Description 
DCC590
8 Port Spectrum Analyzer, 1 RU, 19” Rack mountable tray
DCC591
4 Port Spectrum Analyzer, 1 RU, 19” Rack mountable tray

DAS Control Rack (DCR)      

Active DCC
Figure 1. Active DAS Tray Application

DAS Control Rack (DCR)
Distributed Antenna Systems (DAS) have played a significant role in providing coverage and capacity to in-building wireless communications. The proliferation of smart phones has grown the indoor DAS industry and now pushes this industry to develop equipment that can easily monitor and control the multitude of DAS installations.

Passive DAS trays have been valuable components in conditioning BTS signals going to and from DAS Head End equipment. One function of a passive DAS tray is to split the duplex RF signal at the BTS into its simplex transmit and receive components for fiber transmission out to the radio heads. Also, splitting the duplex signal into transmit and receive components allows the DAS tray to monitor and individually adjust the uplink and downlink signals. Another function of the DAS tray is to attenuate a macro or small cell base station transmit signal (+27 dBm to +48 dBm) to a level acceptable to an active DAS head end, (typically 0 to +20 dBm.) Manual mechanical attenuators are provided in passive DAS trays to fine tune the installation. These attenuators balance power levels on both the transmit and receive signals. Levels are adjusted to accommodate loss in cable runs not anticipated in the original DAS design. All these features combined into a 19” rack mountable tray provide a neat, clean solution to DAS head end signal conditioning.

Although passive DAS trays provide signal conditioning in an active DAS application, the power levels are static once installed. During system installation power levels are set with passive DAS trays to provide optimal signals coming to and from the DAS Head. Eventually system conditions change which can require further adjustments. Signal degradation can occur as a result of failing equipment or transmission connections. Also site power requirements can change as site capacity demand increases and decreases. Site visits are typically required to make the appropriate power adjustments or troubleshoot the system.

Active DCC
Figure 2. DCC500-A01 DAS Control Rack (DCR)

An effective solution is to monitor and control DAS head end power levels remotely. Controlling uplink and downlink power levels signals via a remote server or mobile device will increase site maintenance productivity by reducing or eliminating truck rolls. Microlab's Active DAS Tray, DCC500 Series, provides convenience of RF DAS performance monitoring and control (Fig.1).

Active DCC
Figure 3. DCR User Interface Screenshot

Microlab's DCC500 Series products provide both local and remote monitoring and control functions to optimize system performance. At the center of the active DAS tray DCC500 series is the DAS Control Rack (DCR)(Fig.2). The DCR is an active multi-channel device with programmable variable attenuators and RMS power monitors. The DCR provides all of the necessary components to monitor DAS power levels and adjust the variable attenuators. Access to the DCR can be made any of three ways: through the front panel keypad and LCD screen, through an Ethernet port for use with a computer/laptop, or via remote access through a modem/signal router or a site management system.

Key Features of Microlab's DCC500 Series:
  • Uplink and downlink signal level control and monitoring
  • 8 simplex channels – 4 uplink, 4 downlink
  • 19” rack mount, 1RU
  • Broadband, 698-2700MHz
  • 24/7 power monitoring with alarm
  • Extended dynamic range to -90dBm for uplink channels
  • Automatic Level Control (ALC) automatically adjusts attenuation to maintain optimal Tx and Rx signal levels.
  • Web server with Ethernet interface accessible via PC or mobile browser
  • Includes Battery Backup to maintain attenuator settings
  • Front panel display with control
  • Supports SNMP V3
  • User configured alarms
  • Air interface independent
The Microlab DCR is a cost effective solution for a number of reasons. Since the 1RU, 19” rack mountable tray is not a modular design there is no need for the added expense of a large chassis or separate power supply module purchase, especially if a number of the chassis slots will go unused. If site capacity requirements increase over time or if it is a large venue, additional Microlab DCRs can be daisy chained together. This is a cost effective solution to match current requirements or to grow systems as needed.

Active DCC
Figure 4. DAS Control Rack (DCR) Interface

Active DCC
Figure 5. DAS Monitoring Upgrade Solution

The DCR, being a complete monitoring and control device, is an excellent low cost solution to upgrade DAS systems with existing passive DAS trays. No need to “rip and replace” installed passive DAS trays (Fig.5). Microlab's DCR can be installed and operated with any manufacturer's passive DAS tray. This is good news to equipment owners who are still amortizing initial capital expenditures. DAS head end remote monitoring and control features can be implemented with the least possible expense.

DCR models with minimum features are also available. A monitor only active DAS tray is available for sites that do not require signal conditioning. These units can be used anywhere RF power levels need to be monitored such as existing legacy passive POI. Like the fully functioning DCR the monitoring features can be accessed locally or remotely.

Another DCR model is the attenuator only DAS Tray. The programmable variable attenuators, (8 channels), can be adjusted locally or remotely.

High Power Point of Interface (HPOI)      

High Power Point of Interface (HPOI)
Microlab's DCR can be used as a stand-alone DAS head end interface for low power or retrofit applications, but generally it is meant to work with Microlab's High Power Point of Interface (HPOI) modules. The HPOI attenuates and splits duplexed RF signals from high power base stations.

Microlab's DCC Series® of products have been developed to provide the widest choice of customized solutions in a common platform for delivery with very short lead-times. DAS site solutions vary greatly with multiple carrier frequency bands, base station power levels, MIMO/SISO schemes, connector configurations, and combining/dividing requirements. All of these options create quite a large permutation of different products. Microlab understands the needs of the customer to have a customized solution in a short period of time. Microlab has developed common DAS tray platforms and a component stocking program to specifically address these customer needs. The DCC Series® is this solution.

The line of HPOI products have been designed on this DCC Series® concept. The HPOI products provide a high level of customization while meeting the short lead-time demands of a growing indoor DAS industry.

Active DCC
Figure 6. DAS Control Rack (DCR) with High Power Point of Interface (HPOI) with front connectorsActive DCC
Figure 7: DAS Control Rack (DCR) rear view showing high power parts.


Microlab's HPOI trays can be customized by frequency bands such as 700 MHz LTE, 850 MHz Cellular, 1900 MHz PCS, and 2100 MHz AWS to name a few. Also, combinations of different frequency bands can be included in a single tray. For example a 4 channel HPOI tray can accommodate a 700 MHz LTE MIMO and 2100 MHz AWS MIMO configuration, or possibly a 700 MHz LTE MIMO with a 850 MHz and 1900 MHz SISO configuration.

Indoor DAS deployments can use a variety of base stations. These range from macro cells that pump out 60 Watts of power to small cells on the order of ½ Watt.

Active DCC
Figure 8: DAS Control Rack (DCR) Interface for 60W base station.

Microlab's different HPOI models can accommodate the various power levels of the base station. Connector configuration for the BTS interface can also be customized, for 7-16 DIN or 4.1-9.5 DIN, (“Mini-DIN”).

Microlab's HPOI trays provide an added level of customization by providing front or rear access to the high power base station connections. So depending on the site access to the back or front of the rack the Microlab solution eases installation.

Active DCC
Figure 9. DAS Control Rack (DCR) Interface with High Power Point of Interface (HPOI)

Spectrum Analyzer      

Spectrum Analyzer

Certain venues require more detailed signal analysis. Microlab's Spectrum Analyzer modules can provide this high level of analysis. The 8 port Spectrum Analyzer is a spectrum measurement and analysis unit in a 1RU, 19” rack mountable. It is ideal for either local or remote monitoring of multiple feeds and carriers in DAS, cable or other wireless networks. The Spectrum Analyzer can function as an independent spectrum analyzer or can be easily integrated into a larger measurement network.

Microlab provides two models, a 4 port analyzer, (DCC591), and a 8 port, (DCC590). The 4 port model is mechanically the same as the 8 port. This provides the flexibility of upgrading the 4 port to 8 by the use of a software key. This makes a cost effective solution for projects only requiring 4 ports of analyzing but possibly allowing for upgrading in the future.

The Spectrum Analyzer uses state of the art digital technology and FFT to make lightning fast and accurate measurements. With a very low noise floor and large dynamic range, it is well suited to measure any type of satellite, cable, wireless carrier or DAS system spectral activity, including very narrow band signals, beacon signals, interferers, spurious signals, and for carrier monitoring applications. Spectrum Analyzer accepts all signals from 5 MHz to 3 GHz and input power levels ranging from –110 to +5 dBm. RBW varies from 1 Hz to 15 MHz. The Spectrum Analyzer can be connected to an external 10 MHz reference for improved frequency accuracy and stability. All data communications with the Spectrum Analyzer occurs via its built-in Ethernet port. It can be installed anywhere, occupying only 1RU in a standard equipment rack, allowing you to monitor up to 8 different feeds.

Active DCC
Figure 10. DCC590 Spectrum Analyxer (Front Panel)

Active DCC
Figure 11. DCC590 Spectrum Analyxer (Rear Panel)

The Spectrum Analyzer's powerful Graphical User Interface (GUI) is available using any modern web browser. No additional software is required. The GUI is very easy to use and operates like most traditional spectrum analyzers. It provides user-selectable colors for markers and traces, allows storage of multiple traces and provides measurement reporting. The Spectrum Analyzer GUI includes a built-in Carrier Monitoring function which provides notification via email or SNMP of carrier measurements that exceed user-defined limits, offering you peace of mind that your carriers are operating as expected.

The Spectrum Analyzer provides network access to all technical staff connected to the facility network or a corporate wide area network. This allows all technical staff the ability to monitor feeds and carriers at any time and from any location in the world using only a web browser. For integration into a larger measurement or carrier monitoring system, the Spectrum Analyzer can be operated via its built-in GUI or the user can create a separate user interface using the publicly available API. An SNMP status interface is also provided.

Active DCC
Figure 12. Spectrum Amalyzer graphical user interface.

DCC Series® Combining Solutions      

DCC Series® Combining Solutions
Microlab's DCC Series® is the perfect signal combining solution for your DAS project. Microlab offers a wide variety of combining solutions for In-building Distributed Antenna Systems which cover frequency bands from 380 MHz to 6 GHz. No matter how complex your combining project Microlab can help customize your design saving you time, space and money in the process.

DCC Series® combiner trays are available for multi-carrier point of interface neutral host applications.
Also, combiner trays are available for combining different cellular band technologies along with public safety and WiFi signals. These combined signals can be sent to a common DAS interface or to multiple sectors.

The DCC Series® combiner trays utilize a variety of broad band combiners and multi-band combiners that satisfy the application. These 19” rack mountable combiner trays are 100% factory tested and meet
Microlab's guaranteed low PIM specifications.

Active DCC

Figure 13. DCC Series® KM-90, 8 input by 4 output Combiner Tray