User's Manual

Site Requirements 90DIB500R41SR_FCC02 – 99.1 23
DIB-500 R4.1 Requirements concerning the operation room
Infrastructure
Hybrid antenna coupling
system
Return loss at all connections ≥ 22 dB
Isolation between Tx inputs ≥ 22 dB
Cavity antenna coupling
system
VSWR at all Tx inputs 1.3
Isolation at minimum carrier distance ≥ 10 dB
Table 4.2 Requirements for external antenna coupling systems.
Constituent Property/demand Value/Value range
Table 4.3 Requirements for the individual components of external antenna coupling systems
Constituent Property/demand Value/Value range
Isolator Impedance 50 Ω
Insertion loss at 25 °C ≤ 0.5 dB (recom-
mended)
Isolation at 25 °C ≥ 50 dB
VSWR 1.2
Input power at the Tx input 100 W (nominal)
Reverse power for 10 minutes 60 W
without VSWR monitoring
permanently
60 W
VSWR monitoring For recording faults at the
antenna system, the operator
must implement a separate
VSWR monitoring system.
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Duplex filter Impedance 50 Ω
Insertion loss (Rx) at 25 °C ≤ 1.1 dB (required)
Insertion loss (Tx) at 25 °C ≤ 1.1 dB (recom-
mended)
3rd order intermodulation
component (IM 3)
2 x 43 dBm, 1 MHz distance -135 dBc
Input power at antenna connection and Tx input according to the fed
input power
Isolation between all frequency bands ≥ 80 dB
Return loss at all connections ≥ 22 dB
Bandpass filter Impedance 50 Ω
Insertion loss (Rx) at 25 °C ≤ 1.1 dB (required)
Insertion loss (Tx) at 25 °C ≤ 1.1 dB (recom-
mended)
3rd order intermodulation
component (IM 3)
2 x 43 dBm, 1 MHz distance -135 dBc
Input power at the Tx input according to the fed
input power
Rejection at upper stopband ≥ 55 dB
Return loss at all connections ≥ 22 dB