User's Manual

DIB-500 R4.1 Requirements concerning the operation room
Infrastructure
24 Site Requirements 90DIB500R41SR_FCC02 – 99.1
4.1.5 Preparing the antenna system
The DIB-500 R4.1 is available with different antenna coupling systems. The selection of
the corresponding antenna coupling system depends on the network requirements.
Table 4.4 lists the antenna coupling variants, the number of carriers each variant pro-
vides and the resulting number of supported Tx/Rx antennas. For the diversity variants,
the diversity reception is facilitated by means of another Rx antenna.
Further information
For more information on the technical characteristics and for wiring diagrams of the dif-
ferent variants, please refer to the Installation and Operation Manual.
Independent of the operating mode, the respective Tx (/Rx) antennas must already be
installed and the corresponding connecting cables must be available in the operation
room.
Recommendations for reception
Rohde & Schwarz Professional Mobile Radio GmbH recommends the use of diversity
reception for optimum reception properties.
Table 4.4 Variants of the ACS
Variant 1 carrier 2 carriers 3/4 carriers 5/6 carriers 7/8 carriers
Hybrid
| 1 Tx/Rx antenna (antenna A)
1)
| 1 Rx antenna (antenna B)
2)
| 1 Tx-/Rx antenna (antenna A)
1)
| 1 Rx antenna (antenna B)
2)
Cavity like the hybrid variants but a single-carrier variant is not available
High Power
(without trans-
mitter coupling
system)
| 1 Tx/Rx
antenna
(antenna A)
| 1 Rx antenna
(antenna B)
2)
| 1Tx/Rx
antenna
(antenna A)
| 1Tx/Rx
antenna
(antenna B)
--- --- ---
FlexibleTx depending on the antenna coupling system used --- ---
1) per equipment rack
2) with diversity