Node X RF Enhancers
Andrew Solutions "off-air" digital
Node repeaters bring coverage and capacity into large areas shadowed from the
base station by hills, buildings, and other structures. These Node Xs are highly
suitable for deployment in dense urban environments, tunnels, canyons, as hole
fillers, or as network extensions. They can also be used as an efficient and
low-cost alternative to base stations where coverage is more critical than
additional capacity.
Node X digital outdoor repeaters increase signal strength between a mobile
and a base station in areas where high-quality voice or high-speed data service
is not available. They are ideal for the first phase of a network rollout or
to optimize cost, coverage, and quality in any subsequent phase.
The built-in ICE (interference cancellation equipment) solution to feedback
makes the Node X Series ideal for all outdoor applications. Without ICE a
output power in the Macro Class cannot be achieved when antenna isolation
is the limiting factor which is always the case when donor and coverage antennas
are installed close to each other (for example, on the sample pole).
Node C: for IS-95, CDMA2000, Flash-OFDM, and EV-DO
Node M: for UMTS and HSDPA
Node G: for GSM/GSM-R/EDGE
Node C/M/G
Standard Node Cabinet |
Node C Xx37-LC
Line Connected Cabinet |
Node C 437
Cabinet for CDMA 450
and Flash-OFDM |
Node X Application Examples
Node RF Enhancers in UMTS, CDMA, and GSM applications enable urban and suburban
hole filling and a much higher data rate in their coverage areas.
A) Urban hole filling and speed enhancing
|
B) Extending coverage for buildings and towns
; |
C) Rural highway coverage (UMTS/CDMA)
 |
All enhancers include the appropriate integrated measurement receiver and feedback canceller option.
- Multiple power classes available for substitution of either a macro or micro BTS
- Software programmable, allowing upgrades as network modulation migrates
- No backhaul requirement, reducing both CapEx and OpEx expenses
- Small size and weight for fast, one-man-lift, pole or wall mount installation
- Easy to use, self-contained auto wizard for easy setup
Node Advantages:
- Interference cancellation equipment (ICE): electronic improvement of antenna
isolation; capable of greater than 35 dB of enhancement
- Items measured (GSM only): measurement of BCCH, channel power, BER, FER,
VSWR, RSSI, system identification
- Items measured (CDMA/UMTS only): measurement of pilot power, synch power,
Ec/Io, VSWR, RSSI, multipath signals, system identification, EVM and channel
usage
- Hopping ability (GSM only): follows the hopping sequence for complete network
transparency (baseband and synthesized hopping)
- Auto configuration: set up based on downlink power requirements not gain;
uplink gain is automatically set up based on the downlink settings
- Access: web browser based on local access and remote access; packet data and circuit
switched data options; OMC connectivity via SNMP
Uninterruptible Power Supply (UPS)
Andrew Solutions Uninterruptible Power Supply (UPS) provides high quality ac power
for electronic equipment loads, especially for outside repeater systems. UPS
is optional on all series.
- Continuity of electrical power for at least 20 minutes up to 8 hours, within
the defined limits and without interruption, when commercial ac source fails
or degrades from overload, surges, or spikes
- Hot swap battery replacement for easy, fast maintenance
Battery Backup Units
Low capacity batteries (BBU) operate controller and modem only for at least
10 minutes or provide UPS autonomy of 20+ minutes to 8+ hours. The BBU is standard
on Node Series.
RF Repeater Systems
