Adaptrum ACRS10 TV Band Device User Manual

Adaptrum, Inc TV Band Device

User Manual

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ACRS 1.0 User Manual
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FCC Regulatory Information
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
Any changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
Part 15 TV Band Device Notice
This equipment has been tested and found to comply with the rules for TV bands devices, pursuant to
part 15 of the FCC rules. These rules are designed to provide reasonable protection against harmful
interference. This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio
communications. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
(1) Reorient or relocate the receiving antenna.
(2) Increase the separation between the equipment and receiver.
(3) Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
(4) Consult the manufacturer, dealer or an experienced radio/TV technician for help.
Caution: Exposure to Radio Frequency Radiation.
To comply with FCC RF exposure compliance requirements, for fixed configurations, a separation
distance of at least 40 cm must be maintained between the antenna of this device and all persons.
This device must not be co-located or operating in conjunction with any other antenna or transmitter.
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Introduction
ACRS 1.0 is the first generation Adaptrum cognitive radio system covering spectrum bands from
400 MHz to 1 GHz. Although capable to operate in other spectrum bands below 1 GHz, Adaptrum ACRS
1.0 is specifically designed to operate in the UHF TV Band (470 MHz – 698 MHz), as TV Band Devices
compliant to the rules specified in CFR 47 Part 15 Subpart H. To be rules-compliant, ACRS 1.0 systems
must operate as Fixed TV Band Devices and must be professionally installed. ACRS 1.0 system
specifications are shown in the following table.
General Specifications
Technology TDD OFDMA
Network topology Point to Multi-Point
Frequency range 400 MHz – 1000 MHz
Channel bandwidth Flexible up to 10 MHz
Supporting 6, 7, 8 MHz TV channels
Aggregated data rate
1 Mbps – 13 Mbps
(per 6 MHz channel)
Uplink/downlink Ratio Any
MIMO Up to 4 antennas
Transmit power < 1 W conducted
Channel bandwidth efficiency ~92 percent
Adjacent channel emission
< -57 dBc
Typical receiver sensitivity
(6 MHz Channel)
Signal level
SNR
Data Throughput
-98 dBm 3.5 dB 2.7 Mbps (QPSK 1/2)
-90 dBm
11.5 dB
7.1 Mbps (16 QAM 2/3)
-81 dBm 20.5 dB 12 Mbps (64 QAM 3/4)
Interface Specifications
Antenna connector Type N female
Data/control interface 10/100 Ethernet
Electrical and Mechanical Specifications
Power supply 110 V AC or 220 V AC
Physical dimensions 17 inches x 12 inches x 4.5 inches
Weight 14 LB
Adaptrum ACRS 1.0 system specifications.
ACRS 1.0 radio unit is enclosed in a 2U size box whose front panel and back panel are shown in
the following pictures. Both the base station and the client station use the same radio unit.
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ACRS 1.0 system must be professionally installed. Please refer to “ACRS 1.0 Professional
Installer Manual” for detailed discussion on hardware installation. After installation, the base station
and client station system configurations are illustrated in the following figures.
ACRS 1.0
Base Radio
Feed Cable
Antenna
Base Control
PC
Ethernet
Internet
Ethernet
Base station installation diagram.
ACRS 1.0
Client Radio
Feed Cable
Antenna
Client Control
PC
Ethernet Broadband
Router
Ethernet
Ethernet/WiFi
Client
Devices
Client station installation diagram.
A whitespace communication link is established between the base station and client station
allowing the client side networking devices to connect to the Internet. Multiple client units may connect
to the same base station. From the IP networking perspective, the base station acts like a layer 2 bridge
to the client-side networking devices connected to the client control PC. As shown in Figure 3, both the
base control PC and the client side broadband router will have IP addresses on the hosting subnet.
Multiple client side devices may be visible on the subnet if the broadband router is replaced with a
switch.
Illustration of network topology.
System Operation
Please refer to “ACRS 1.0 Professional Installer Manual” for detailed discussion on hardware and
software installation. Once installed, the main software can be launched on the control PCs through the
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shortcut in the “Start Menu” folder. The software will be launched in the “User” mode. When running in
the “User” mode, the software only has access to limited database functions.
GUI Control Interface
Base station GUI control panel "Link" pane in the “User” mode.
The GUI control panel is shown in the above figure. The GUI panel has a main frame body and 6
panes: Log, Link, System Information, Diagnostics, Database and Installation. Among them, the “Link”
and “Database” panes are most useful in terms of monitoring system performance and interacting with
TVWS database. The figure above and figure below show the base station “Link” and “Database” panes
respectively.
Referring to the “Database” pane below, in the “User” mode, the information entries for device
registration and channel list request are disabled. These information are entered during installation and
loaded directly from the system registry in the “User” mode. Note further that the channel list request is
sent periodically with the period specified in the field “Update Interval” which is 300 seconds by default.
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Base station GUI control panel “Database” pane.
The base and client control panels are only slightly different. The following two figures show the
client station “Link” and “Database” panes. Again, the client software will operate in the “User” mode
and the information entries for device registration and channel list request are disabled and loaded
directly from system registry. The client station “Database” pane doesn’t contain device registration
information which is retrieved from the base station side. The client station “Database” pane allows the
user to change scan channel list in case the connection to the base station is lost – the scan channel list
has been set during installation and loaded from system registry but the user is able to modify it.
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Client station GUI control "Link" pane.
Client station GUI control "Database" pane.
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Base Station Operation
The base station operation is discussed in the following.
1) When the software launches on the base control PC, it will automatically contacted the
database and the available channels are shown after “BASE MAC…”. The prompt “Select From
Available Channels” requests the user to select a valid channel from the channel list. Note
further that device registration is not performed in the “User” mode but during installation – see
“ACRS 1.0 Professional Installer Manual”.
2) Select a channel from the pull down menu on the prompt and click “Select” to set the base
operating channel as shown in the following.
3) After the channel selection, the link pane is shown as following. Click “Start Service” to start
transmission on the base station.
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4) After the client station successfully connects to the base station, the “Link” pane will show
uplink and downlink data rates, modulation schemes, BERs, PERs and signal power estimations
as shown in the following figure. Note once connected to the base station, the client station will
also send periodical channel list request to the database through the base station.
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Client Station Operation
The client station operation is discussed in the following.
1) When the software first launches on the client station control PC in the “User” mode, the client
will automatically scan all channels specified in the scan channel list. Once the client identifies
an active base station signal on a scan channel, it will try to connect to the base station on that
channel and once the base station verifies that the client can operate on the channel after
contacting an authorized TV White Space Database, it will grant the connection session from the
client.
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2) The user can select a different “Scan Channel Set” at any time to look for an active base station.
The default scan channel set is entered during installation and is loaded from system registry.
The user can modify the scan channel list using “…” button after “Scan Channel Set” (which will
prompt for scan channel selections as shown in the following figure) and click “Update Now”.
3) Once the client successfully connects to the base station, it will enter normal operation mode.
During normal operation, the “Link” pane can be used to monitor the performance.
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4) During normal operation, the client will send channel list request periodically to the base
station. When the current base station operating channel is no long in the client channel list, the
base station will terminate the connection session with the client. Subsequently, the client will
enter scanning mode again and rescan all the channels in the scan channel set.

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