To Next PageTo Next PageWhat to do if COBHAM D-MBR 3707 Extender is muted?
If your COBHAM Extender is muted, especially if system-initiated, it might be due to an isolation problem or temperature issue. Check the booster's gain. If the gain is minimal, there may be an isolation problem; try to improve isolation. You can also try turning the booster off and then on again to reset the function. If the problem continues, consider replacing the unit.
What to do if the signal from the donor antenna (DL) is too low on COBHAM D-MBR 3707?
If the signal from the donor antenna on your COBHAM Extender is too low, check the donor/base connections and the antenna position. Also, check the signal level of the donor/base antenna. If the alarm persists, increase the value of the DL Output Threshold Delta [dBm] as needed.
How to cool down COBHAM D-MBR 3707 Extender?
If your COBHAM Extender's temperature is exceedingly high, check the booster case for external causes such as sun exposure, a hot environment, or blocked airflow. Eliminate the cause of the excessive heat.
Why does COBHAM D-MBR 3707 trigger an alarm related to return loss?
This alarm is triggered on your COBHAM Extender when the return loss of the downlink or uplink antenna or cable connection exceeds the allowed limit. This can be caused by a defective cable or antenna, which decreases the VSWR. Check the cable to resolve this issue.
How to fix power failure in COBHAM Extender?
To address a power failure in your COBHAM Extender, turn the booster off (this will reset the function) and then turn it back on. If the fault continues, replace the unit.
What does it mean if the power amplifier current is not within limits on COBHAM D-MBR 3707 Extender?
If the power amplifier current is not within limits (too high or too low) on your COBHAM Extender, and the mute option is enabled, this indicates low power amplifier current caused by the mute. Check the LEDs status in the Booster and contact Cobham Wireless service support.
What causes system mute on COBHAM D-MBR 3707?
System mute on your COBHAM Extender can be caused by temperature failure, synthesizer failure, hardware failure, or high RSSI power DL/UL when the shutdown mechanisms are on. Check the LED and other alarms from the Booster and contact Cobham Wireless Support.
Details the key features and capabilities of the D-MBR 3707-3708 PS NFPA Signal Booster.
Provides identification numbers and descriptions for ordering the signal booster unit.
Explains the system architecture, including power sources and alarm connections for NFPA compliance.
Describes the Smart Automatic Level Control (Smart-ALC) algorithm for gain adjustment and oscillation prevention.
Details the AC feeder and battery charger unit for installations where UPS is not available.
Illustrates and describes the various interface ports located on the booster's front panel.
Explains the overall functionality of the signal booster, including downlink and uplink signal paths.
Guidelines for selecting and installing the donor antenna, including required information and specifications.
Requirements and recommendations for service antennas, covering indoor and outdoor installation types.
Lists essential information required from the Base Transceiver Station (BTS) for setup.
Criteria and environmental considerations for choosing the optimal installation location for the signal booster.
Provides guidelines for selecting and installing high-performance, low-loss coaxial cables for the booster.
Outlines the step-by-step workflow for installing the signal booster unit.
Details the procedure for unpacking the booster and verifying the included package contents.
Provides instructions and criteria for mounting the booster unit, including wall and rack installations.
Describes how to make the necessary connections for grounding, antennas, and power-up.
Lists the identification and part numbers for ordering the AC feeder and battery charger.
Illustrates the architecture of the battery charger, its power flow, and alarm connections.
Details the interfaces on the AC feeder and battery charger, including power and alarm connections.
Step-by-step guide for installing the battery charger, including location, grounding, and connections.
Provides a summary of the procedures required for setting up and commissioning the D-MBR Booster.
Instructions on how to establish a local web session and navigate the booster's management GUI.
Details on configuring RF parameters and up to 12 sub-bands for the 700 MHz and 800 MHz bands.
Procedure for setting the correct date and time for accurate event and alarm logging.
Guides on configuring external alarm inputs from sources like the battery charger or UPS.
Instructions for setting up the booster's IP address and configuring SNMP trap notifications for fault reporting.
Procedure for changing the administrator password to enhance system security.
Describes how to manage user accounts, including adding, editing, and deleting users with different access levels.
How to view booster-level information (hardware/software versions) and band-level details.
Procedures for backing up and restoring band-level configuration files for the signal booster.
Instructions for upgrading the booster's CMU software version, allowing for previous version restore.
Explains the meaning of the uplink and downlink status LEDs and corrective actions for faults.
How to view the log of past and current alarms generated by the booster.
Displays currently activated alarms, including any relevant dry-contact alarms.
Description of band-specific alarms, their causes, and recommended troubleshooting actions.
Procedure to adjust the severity levels (minor, major, critical) of alarms.
General