User's Manual
Table Of Contents
- 1 Introduction
- 2 DMR Operational Description
- 3 DMR Specifications
- 4 Installation guidelines
- 4.1 RF Exposure
- 4.2 Health and Safety
- 4.2 Health and Safety
- Read all available documentation and warnings before handling the equipment! Equipment failures due to improper handling are normally not covered by the product warranty!
- Keep passwords and other operational information away from unauthorized personnel!
- Bird Repeater system is an advanced technology system and should be handled by FCC Licensee or FCC approved staff.
- Read all documentation and warnings before handling the equipment.
- Obey all warning signs on the equipment and in documentation.
- The equipment may get hot during operation, do not operate outside permitted temperature range and keep away from heat sensitive material!
- The equipment contains ESD sensitive components. Open the equipment ONLY in a safe location designed for handling ESD products and use grounding devices! Opening the unit is not intended for field maintenance!
- The equipment contains ESD sensitive components. If not handled with care critical components may be damaged or destroyed. To avoid any damage due to ESD standard ESD precautions shall be used when handling the equipment.
- The product transmits RF signals keep away from Antennas and other radiating devices.
- Repeaters generate radio signals which are transmitted by the connected antennas. Installations should always be done so that the radiation exposure doesn’t exceed the recommendation set up by local authorities.
- Consult a FCC licensee or other applicable regulation body for details on RF requirements and safety issues on RF!
- Electrical installation shall be done in accordance with local safety regulations and laws.
- Make sure to use the equipment only in its intended applications and on the allowed frequencies.
- Avoid overheating by avoiding sunlight exposure!
- 4.2.1 Installing the DMR Repeater Unit
- 4.2.2 Antenna Connections
- 4.2.3 Power AC
- 5 DMR Repeater Commissioning
BIRD DMR USER MANUAL
15
Revision 2
5.2.4 Advanced RF Config
Advanced mode in RF config menu gives user a possibility to control and fine tune the frequency
band edges, set up link symmetry, and self-oscillation protection.
Band edges control gives user a possibility to fine tune the set band width with 0-100 kHz up or
down of the actual set frequency band.
Link symmetry is a function that is mainly developed for usage in moving application setups, like in-
train, boats for example. What is does basically is that UL gain is controlled by the DL gain. When this
feature is activated, the repeater will reduce the gain in UL as in DL with the same symmetrical
pattern. The UL gain is determined by the actual automatically controlled gain used in DL. The
originally set gain difference between Uplink and Downlink is kept as originally set.
Link symmetry feature is used to minimize the amount of Noise level to the BTS and is developed
mainly for moving applications as mentioned above such as trains, boats for example when/if the
signal from the BTS fluctuates.