Synchronization; Gps / Glonass; Overall Gps / Glonass Antenna Rf Requirements; Table 9 Recommended Gps / Glonass Antenna Specifications - Nokia Flexi Zone Pico Product Description

Flexi Zone Indoor Pico BTS Product Description

7 Synchronization

The Flexi Zone Pico Indoor BTS supports the following synchronisation mechanisms:
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7.1 GPS / GLONASS

Instead of using the transport network for carrying the Primary Reference Clock (PRC)
traceable synchronization reference, it is possible to use a distributed PRC architecture.
In this case, every site in the network has a GPS-based or other synchronization source
which provides a PRC traceable synchronization reference signal for RAN NEs. It is also
possible to use a combination of distributed and hierarchical master-slave architecture.
In some cases, other Network Elements (for example transmission nodes) at the same
site provide the synchronization reference for RAN Network Elements through external
synchronization interfaces.

7.1.1 Overall GPS / GLONASS Antenna RF Requirements

Antenna Requirements
The Nokia recommended GPS / GLONASS antennas meet all quality and field
performance requirements along with criteria outlined in the table below and have proven
quality with good field performance. While it is possible to use other antennas,
considerable care must be exercised when selecting alternatives to ensure full BTS
compatibility for all conditions.
Table 9 Recommended GPS / GLONASS Antenna Specifications
Gain
Noise Figure
Operating Frequency
Filtering
LNA Supply Voltage
LNA Supply Current
Azimuth Coverage
Elevation Coverage
Issue: 01
Integrated GPS/GLONASS receiver
Synchronous Ethernet (ITU-T G.8261)
Timing over Packet according to IEEE 1588v2
Requirement / Recommendations
+25 dB (recommended)
<2.5 dB (recommended)
GPS: 1575.42 MHz with less than 3 dB attenuation at a +1.2 MHz offset from
center (Required)
GLONASS: 1602 MHz with less than 3 dB attenuation at a +8 MHz offset from
center (Required)
>40 dB attenuation at +50 MHz offset from L1 center (Recommended) )
Operation with a supply voltage of +4.6 VDC +/- 0.25 V (Required)
<30 mA (Required)
360° (Required)
10° to 90° (Required)
DN09210454
Synchronization
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