IP Mobilenet B64700G25 Users Manual
CHAPTER 3: PROGRAMMING INSTRUCTIONS
Typical Antenna Configuration
Base station antenna configurations may vary from site to site depending on the type of mounting
structure, the presence of existing antennas, mounting structure loading limitations, etc. The following
information is provided as a guideline for a typical scenario.
Figure 6: Typical Antenna Configuration
An otpimal antenna mounting configuration is shown in the figure above. The transmit antenna and
receive antennas are located at different elevations. This vertical separation provides the greatest degree
of isolation between transmit and receive antennas. The three (3) receive antennas are mounted at the
same elevation and are oriented in a 120 degree triangular pattern. A triangular orientation of the receive
antennas provides optimal diversity performance in an omnidirectional pattern.
The greater the separation between receive antennas, the greater the diversity gain; therefore,
the distance between antennas should be made as great as is practical.
In the event only two (2) receive antennas are used (i.e. a dual receiver diversity reception system), the
receive antennas should be mounted in a broadside orientation with respect to the radio coverage area.
To prevent the antenna’s radiation pattern from becoming distorted, the immediate area
surrounding each antenna should be kept free from conductive objects (i.e. other antennas, guy
wires, or the tower structure itself). The amount of clear area required to prevent pattern distorion
is equal to the antenna’s near-field exclusion.
CHAPTER 3: PROGRAMMING INSTRUCTIONS
Near-Field Exclusion Zone
The near-field exclusion zone (NFEZ) is the required distance between antennas to any other surfaces to
improve transmit and receive performance. The large radio frequency field that builts up around the
antenna upon transmitting is essential for proper data transmission. It can be severely corrupted by metal
objects in the NFEZ. As seen in the previous figure, the transmitting antenna is placed at the very top of
the tower especially if the base station will be required to transmit in all directions (omni-directional).
If the transmitting antenna cannot be positioned on the top of the tower and must be placed
on a tower arm, then it is important to realize that coverage will be shaded in the area behind
the tower from the anetnna. The installer must be certain that the area of desired coverage is
away from the tower and not behind it.
Receiving and transmitting antennas should not be on the same plane, especially VHF and
UHF systems where the frequency splits are relatiely small. An antenna in the near-field
exclusion zone that is tuned for the same frequency as the transmitting antenna will reradiate
the signal and create unwanted effects on the transmittal signal. The receivers will be
inundated by high levels of radio frequency energy from the transmitting antenna. This is
why it is important to include vertical separation in the plan for the base station installation.
The isolation provided by 30 feet of vertical spearation can dramatically improve the
performance of the base station.
An antenna’s NFEZ can be calculated as follows:
D = 2d2
λ
Where: D is the distance to the anenna’s near field boundary
d is the antenna’s longest linear dimension (in the same units as D)
Maximizing the distance between the receive antennas will provide maximum diversity gain and
will minimize antenna radiation pattern distortion.
λ is the wavelength (in the same units as D)
CHAPTER 3: PROGRAMMING INSTRUCTIONS
Power Connection
Figure 7: Base Station Power Connection
NOTE
: The base station shown in the figure only displays Ethernet connectivity and is not display the
actual 700 MHz base station.
To connect the base station power connector, perform the following steps:
Step 1 Connect the power cable to the base station power supply connection (as shown in the figure
Step 2 Connect the wires to the appropriate output (+ and -) output posts on the power supply (as
above).
shown in the figure above).
CHAPTER 3: PROGRAMMING INSTRUCTIONS
Post Installation Checklist
The following table lists the tasks that should be performed upon completing installation.
TABLE 4: POST INSTALLATION CHECKLIST
NO. CHECKLIST ITEM
1 Scope out the entire area setup to locate any obvious problem areas.
2 Check antenna routing for safety concerns and near-field boundary setup.
Use tie wraps, where possible to ensure that all cables routed in parallel are
3
bundled together.
4 Perform appropriate testing to ensure base station works properly.
Once installation is complete make sure the area is clear of debris that would prevent proper
airflow and ventilation.
Overview
This section applies to all frequency ranges of the IPSeries Base Stations. Important! The base
station’s IP address must be known prior to performing the procedures in this section.
The programming procedure should be performed when it is necessary to upgrade a base station’s
Firmware or to change the operating parameters to suit the customer’s needs before putting into
complete operation.
HyperTerminal Setup
To communicate and access parameters from the base station, the base station must be connected to a
HyperTerminal session setup on a personal computer.
Perform the following steps to setup the base station for communication with HyperTerminal:
Step 1 Connect the base station and the PC as shown in the figure below.
;
CHAPTER 3: PROGRAMMING INSTRUCTIONS
Figure 8: Base Station-to-HyperTerminal Connection Diagram
NOTE
: The base station shown in the figure only displays Ethernet connectivity and is not display the
actual 700 MHz base station.
Step 2 Power on the PC.
Step 3 Power on the base station using the front panel power switch.
Step 4 On the PC’s desktop, click on the Start button and select Accessories,
Communications, and HyperTerminal.
Step 5 At the Connection Description window enter IPMNBS and click on the OK button.
Step 6 At the Connect To window, under Con
available on the computer) and click on the OK button.
nect using: select COM1 or COM2 (whichever is
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