For a wireless cellular network to achieve its full operating potential, each sector
must perform up to its design standard. When this does not occur, the economic impact to the service provider
can be substantial. This could equate to:
- Lost revenue at
dissatisfaction and churn
- Reduction in
cell site coverage area
To achieve the full operating potential of each node in the network, each Radio Frequency (RF) component and
interconnection of RF path components must be properly installed, verified and
maintained to insure optimum performance over time.
To maximize RF
performance, it is essential that:
- The carrier
signals are efficiently propagated from the transmitter output through the
RF path components with minimum
loss and distortion.
reception of the RF signal from the handset at the base station antenna,
the signal must be efficiently
propagated back to the base station receiver.
- Interference/noise at the base station receiver within the frequency band of the
handset uplink signals must be lower
in magnitude than the receiver noise floor.
are more components than ever in the RF path. Each additional component is
another potential source of signal
degradation. All of these components
contribute to increasing system insertion
loss and reducing the overall return
loss value. This simply means the
system’s performance is getting worse.
providers have invested a lot of money in 4G
networks and will continue to do so for the next generation of technologies,
such as 5G. These investments are often overlaid on the existing network, using
existing tower equipment such as coaxial feeder cable, filters and base station
antennas. Service providers are increasingly taking steps to avoid potential signal degradation that can
result from overlays, especially when adding new frequency bands. Passive
Intermodulation (PIM), being one of the causes of signal degradation,
is such an issue today that many service providers deploy PIM
testing equipment to the field to confirm PIM performance of the site.
what is the net result? The incidence and cost of PIM is no longer simply a
nuisance. It is a critical threat to network efficiency, channel capacity, and
bottom line profit.
I recommend you get
certified to avoid these issues. That’s why the CommScope Infrastructure Academy offers a PIM related course--SP6160 PIM/VSWR Certification.
How are you testing for PIM today?