Westell PSA91080-UHF Bi-Directional Amplifier User Manual Part 2

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UHF Product Manual
July 2018, Rev B
4. After installation has completed, a shortcut in user desktop will appear, and new
installer windows appears in order to install USB drivers. Follow the installer stepby-step process
5. Connect Ethernet or USB cable between computer and Signal Booster, keeping the
Signal Booster powered off. New USB device will be detected
6.
7. Turn on the Signal Booster
BE SURE THAT “TO MOBILE” AND “TO BASE” PORTS ARE PROPERLY
LOADED EITHER WITH 50 OHMS DUMMY LOADS, OR RADIATING
SYSTEM.
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8. Execute the Westell Control Software. Next window will appear:
User interface controls:
•
•
•
•
•
Scan Devices Button: refresh the available COM ports and identify Westell
devices
Connection Button: connect / disconnect software from Signal Booster
List of available devices: below two buttons, is placed a dropdown list that
shows all available COM ports. Available COM ports not related to Westell
Signal Boosters will be shown with its number and “Unknown device” label.
COM ports related to Westell Signal Boosters will show a device description.
Embedded Web browser: graphical area where configuration and monitoring
parameters will be shown.
File menu: contains menus to save Signal Booster configuration to a file and
load configuration from file to Signal Booster.
NOTE: if Westell Signal Booster is not turned on, related COM port will appear as
“Unknown device”
8. Click “Scan Devices”
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Now, the Westell Digital Signal Booster is shown in the list of available devices, and
connection button is enabled.
NOTE: Westell Signal Booster could not appear in list, if COM port number is higher than
COM16, depending on Windows version. COM port number can be forced to arbitrary
number (below COM16) through Device Administrator. In order to change COM number,
click “Properties” pop-up menu.
Click “Advanced Options”
Change COM port number
9. Click “Connect”. Westell Control Software window will be automatically maximized,
and web browser will show the configuration screen. Application screens are described
in the next section due to these application screens and web pages (in webserver
remote mode) are the same.
10. Once Signal Booster is configured, user can disconnect software using connection
button, now labelled “Disconnect”. Initial window will be shown.
If Signal Booster is disconnected or turned off, while Westell Control Software is
connected to device, software will go back to initial window. Moreover, if some
communication problem occurs while device is monitored, the software will go back to
initial state as well.
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Initial window for narrownarrow-band filters version
Initial window for adjustable bandwidth filters version
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Initial window for dual firmware version
10 Remote Web Server option
10.1 IP Connection
Westell Signal Boosters use an Ethernet module and 3G Router to give TCP/IP
connectivity (webserver and SNMP Agent). In local mode, user can connect directly a
computer to the Ethernet module using the inside Ethernet cable.
In order to access to web browser, default IP addresses of Ethernet module are detailed
in the next table:
IP Address
192.168.1.10
IP Address
Network submask
255.255.255.0
Network submask
Gateway
192.168.1.2
Gateway
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Computer network adapter configuration needs to be set to same network submask and
gateway. IP address can take any value in this IP range (192.168.1.11, for instance).
These addresses can be changed by user.
10.2 Web pages description
Once the Ethernet module is properly configured, user can connect to the Signal Booster,
writing IP address in URL toolbar of any web browser available in its computer. Default URL is
http://192.168.1.10.
First screen to appear is Authentication. Default login and password are:
Login
admin
Login
Password
admin
Password
Password can be changed by user, using menu described in next sections.
NOTE: in order to restore password, push the button placed close to USB Connector during 5
seconds.
After authentication, web browser will load the main page of Westell Signal Booster showing RF
configuration and monitoring parameters.
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At left side of webpage, configuration menus are shown:
Content
•
•
Status: whole RF configuration and monitoring parameters are shown. These
parameters are described in the next section.
Tag: user can set a tag to ease Signal Booster identification. For modifying the
TAG, write a new value in text field and click over Apply Changes link
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•
IP: At this page, Signal Booster IP address, network submask, gateway address and
IP addresses of SNMP Managers are shown. User can set addresses of two SNMP
Managers (IP where SNMP agent will send TRAP information). To modify, click
over Apply Changes link after writing new values on text fields.
In case the Signal Booster had been fit with an internal modem-router, its own IP
address settings would be fixed and the modem's address would be shown in the greyed
boxes.
•
Spectrum: this page shows estimation for input and output spectrum in either DL or UL,
whatever is selected by the user. Estimation for output spectrum takes into account RF
input levels, and gain, bandwidth filters and squelch options programmed by the user,
and it can be a useful tool for users to know how the undesired signals are rejected by the
channel selective Signal Booster.
The user can change start and stop frequency modifying text fields placed at the page
bottom. Minimum span is 200KHz and maximum span is the band covered by the Signal
Booster. In case the same frequency is set for both start and stop, then zero-span is set.
For user convenience, a zero-span checkbox is available that makes that operation with
one click, and chooses the start frequency setting as the measurement frequency. That
also disables the stop frequency setting and changes it according to start frequency. And
finally, measurements can be averaged up to 32 times.
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•
Date and Time: page to modify real time clock. When the Signal Booster is not powered,
this clock runs with a voltage supply provided by a 3V lithium battery, button type of
20mm (CR2032) with 220mA·h. This suffices for at least half year. When the Signal Booster
is powered, no current is drained from the battery. So, actual battery life will depend on
Signal Booster usage. For battery replacement, please locate battery holder between USB
and Ethernet connectors on main board. Battery positive side is UP, i.e. on holder clip.
Date and time setting
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After clicking on “Apply Changes” link, next message will appear, warning the user that
system needs to be rebooted.
•
Filter Info: following this link, a new window appears with detailed information of
frequency and delay response of all available filter bandwidths (1dB, 3dB and 10dB
bandwidths and delay at center frequency)
•
Filter tool: assistant to easily configure signal booster filters with minimum delay
response (all filters set to 90KHz bandwidth). It is especially useful if carriers are grouped
in “frequency packets” where it is not possible to configure an independent filter for
each one. With this tool filtering parameters are automatically set from a desired
frequency carriers list. This tool executes in a pop-up window as the image below and is
described in next sections:
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The desired carrier frequencies of the downlink band, are to be typed in the text area
of this window expressed in MHz. The tool will try to enable as many filters of 90KHz
bandwidth as necessary for all carriers, using a fine gain of 0dB by default. This is trivial
when carrier frequencies are sufficiently separated apart. For instance:
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The button "Compute Configuration Proposal" shows the computed filter frequencies in
another text area and, if accepted, the button "Apply Proposal" would actually perform
the configuration change.
However, for carrier frequencies that come in packets, the filter frequencies should not
be set too close because the overall response would be distorted. Depending upon
signal modulation, that response distortion might not have any consequence. But in the
case that distortion cannot be tolerated, consider that the minimum frequency
separation between two filters to avoid this problem is 1.25 times the semi-sum of their
bandwidths. For instance, two filters width bandwidths 90KHz and 30KHz respectively,
must be separated apart by 1.25·(90 + 30) / 2 = 75 KHz.
Nevertheless, there are certain conditions under which filters can be set closer to make
up a single filter with wider bandwidth:
o The frequency separation must be 93.75 KHz.
o All of them must have the same bandwidth setting of 90 KHz.
o All of them must have the same fine gain setting.
The Filter Info window shows the frequency response of the combination of up to five
filters:
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Now, consider for instance a case with the following downlink carrier frequencies: 392.0,
392.05, 392.1, 392.15, 392.2, 393.0 and 394.0 MHz. This is when the Filter Tool comes in
handy. It will automatically choose the filters required to cover the range between 392.0
MHz and 392.2 MHz. As shown in next picture, it would set three filters with frequencies
392.00625 MHz, 392.1 MHz and 392.19375 MHz for the four carriers in the packet, and
two more filters for the two separated carriers.
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It is certainly possible to do this same operation manually, in the Filter Control Frame,
although it would be less convenient. Should the user set filters without keeping these
rules, the software would show a warning message, as in the following image:
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•
Password (only via web connection): to modify webpage password, old password is
required, and new password needs to be written two times. After clicking on “Apply
Changes” link, new authentication screen appear, where user must write new password.
•
SNMP (only via web connection): user can configure through webserver some SNMP
parameters:
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•
Read-only community and read-write community: set passwords for SNMP
agent (typically "public" / "private")
Watchdog Period: time in minutes without external IP access to the device
(HTTP, SNMP or PING) after which the embedded Ethernet module will reboot
just in case it were stuck. It does not affect RF functioning. Default value is
1440 minutes, i.e. one day.
Ethernet RESET: resets Ethernet module.
Delete All Traps: clear all alarm conditions and sets trap counter to zero
Trap community: set trap community for each connection to SNMP Manager
Trap port: set UDP port for SNMP trap sending. Default standard port is 162.
SNMP polling is done through standard port nr. 161.
Trap repetition: set number of traps that SNMP agent will send every time that
alarm conditions vary. Maximum number is five repetitions and the time lapse
between them is 10 seconds.
Manager Enable: enables each connection to SNMP Manager independently. If
enabled, traps will be sent to manager IP address set in IP section.
Keep-Alive period: Keep-Alive traps can be sent periodically with the purpose
of letting the SNMP manager know that the agent is working. The time in
minutes between these traps is the Keep-Alive period. Default period is 60
minutes. A setting o 0 disables sending these traps. These traps are not
affected by the Trap Repetition mentioned before.
Configuration
o Apply Changes: as it is said above, this link is used to load changes to the Signal
Booster, in configuration, tag, IP, password and date and time menus. After any
configuration change, web page will show and icon that allows user to know if
configuration has been successfully applied:
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•
o Reload Settings: clicking this link, Signal Booster configuration data is refreshed.
Version: shows hardware, firmware and software versions of Signal Booster and serial
number.
11 RF parameters description
“Status” menu shows whole RF configuration and monitoring data that are distributed along the
webpage.
The status window is divided in two main blocks: general control and filtering control. First,
general control contains signal booster main configuration parameters, while second block is a
list with variable number of rows (according to number of enabled filters) which contains
detailed configuration and monitoring parameters of each filter. Maximum number of filters is
32 for narrow filters version and 8 for adjustable bandwidth version
General control frame for narrow-band version
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General control frame for adjustable bandwidth version
General control frame for dual version
General control frame. There are four sub-sections inside this frame:
•
Main uplink control: RF main parameters regarding to uplink band are contained in
this section: gain, output power limit, squelch threshold, squelch enable, PA enable
control, RF output power indicator, and RF input overload, PA status and stability
alarms. Next table describes information of this frame:
Uplink frame
Parameter
Description
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Main Gain
Set maximum gain of Signal Booster at UL band. Range
can vary between models.
Power Limit
Set maximum output power of Signal Booster at UL
band. System automatically will apply a correction to
share this limit between the active channels. For
instance, +18dBm band limit means +12dBm maximum
output power per channels for 4 active channels. Range
can vary between models depending on rated power.
Squelch Enable
Enabling this control, Signal Booster does not transmit
in each channel if RF input power do not exceed the
threshold level configured according to next row
Squelch Threshold
If squelch is enabled, input levels below this threshold
are not transmitted.
This control enables / disables PA UL:
PA Enable
Green button and label “ON” means that PA is enabled,
red button and label “OFF” means that PA is disabled
RF Output Power
Shows instantaneous RF output power at UL band
Overload UL
This alarm indicates that Signal Booster is being
overloaded at UL band, due to very high RF input level
PA Status
PA status alarm indication based on current
consumption
All Filters Same BW
If enabled, any change of bandwidth filter of any
enabled filter will be applied to all UL filters
Main downlink control: parameters regarding to downlink band. They are almost
equal to uplink band.
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Downlink frame
Parameter
Description
Main Gain
Set maximum gain of Signal Booster at DL band. Range
can vary between models.
Power Limit
Set maximum output power of Signal Booster at DL band.
System automatically will apply a correction to share this
limit between the active channels. For instance, +36dBm
band limit means +30dBm maximum output power per
channels for 4 active channels. Range can vary between
models depending on rated power.
Squelch Enable
Enabling this control, Signal Booster does not transmit in
each channel if RF input power do not exceed the
threshold level configured according to next row.
Squelch Threshold
If squelch is enabled, input levels below this threshold are
not transmitted.
This control enables / disables PA DL:
PA Enable
Green button and label “ON” means that PA is enabled,
red button and label “OFF” means that PA is disabled
RF output power
Shows instantaneous RF output power at DL band
Overload DL
This alarm indicates that Signal Booster is being
overloaded at DL band, due to very high RF input level
Comm. Error
Indicates that communication with monitoring PA Board
is lost. In this case, following three alarms will not be
available
AGC Fail
This alarms appear if output power is higher than
maximum output power (typical +37dBm) plus 3dB.
VSWR
Alarm appears if high reflected power is detected in “To
mobile” connector
Tx Power Low
Indicates that measured output power at PA output is
lower than expected according to RF input levels and
configured gains
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General control frame for narrow band and dual version
General control
General control frame
Parameter
Description
Linked UL/DL
frequencies
If 'Yes' then frequency setting in DL will also modify UL
according to frequency band split preset in factory. If
'No' then filter frequencies can be set independently in
UL and DL.
Squelch mode
control
If this control is set to “Linked”, DL channels without
input signal (according to DL Squelch threshold)
automatically squelch related UL channels
RESET
Reboots digital signal processor
Simplex Mode (only
available in some
narrow filters
versions)
If enabled, signal booster works in simplex mode. This
is, any DL signal detected in any DL enabled filter blocks
all UL filters and any UL signal detected in any UL
enabled filter blocks all DL filters
Temperature
Shows internal Signal Booster temperature
Rx Power Low
Alarm is active, if signal is not detected in any DL
channel
Hardware fail alarm
Indicates critical malfunctioning in digital signal
processor
Show filters
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Firmware selection
(only for dual
version)
User can change filtering mode in case of dual version
signal booster
Simplex mode checkbox control is only visible in devices with such capability. It allows signal
flow only in one direction, either uplink or downlink, at any given time. The chosen direction is
made automatically based on signal detection which, in turn, depends on squelch. Therefore,
turning on simplex mode automatically turns on squelch, both in uplink and downlink sections,
and disables these controls for the user. Besides, it also sets squelch mode to "Not Linked" and
disables this control, too. This is necessary since otherwise the lack of RF input signal in downlink
would mute the uplink RF input, thus blocking all communication. The look of the general
control frame in simplex mode is as in next image:
Filter control frame for narrow-band version
•
Filtering control frame.
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Filter control frame for narrow-band version
Filter control frame for adjustable bandwidth version
•
Filter control frame: shows configuration and monitoring information of all filters. The
frame is divided in two: uplink and downlink. Data showed in each half is symmetric.
Filter control frame
Parameter
Description
On
Allows to enable/disable each filter
Frequency
Configures center frequency of each filter
Bandwidth filter control for
narrow-band version only
There are up to five available filters (depending on
factory setup) to adjust the trade-off between rejection
to undesired signals and delay
Fine gain control
Each channel gain can be fine adjusted
RF input power
Shows RF input level for each channel
Signal detection
With this indicator, system shows if signal is detected at
input, according to squelch threshold. Moreover, with
Squelch Mode = ‘Linked’, UL shows no signal if signal is
not detected in the same DL channel even if UL signal
exceed squelch threshold. Similarly, with simplex mode
enabled, if one signal is detected at DL band, all UL
filters will show “No signal”
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RF output power
Shows estimation for RF output level for each channel,
according to programmed gain and AGC control. Shows
‘OFF’ in the same cases that signal detection shows ‘No
signal’
AGC
Indicates gain reduction due to power limitation control.
In case of adjustable filter version, filter control frame is slightly different. According to
entry mode button, frequency and bandwidth parameter configuration can be:
Center frequency (in 25KHz steps) and bandwidth filters (50KHz steps)
Start and stop frequencies (in 25KHz steps)
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12 Spectrum Analyzer
The spectrum analyzer feature of the Signal Booster is a useful tool for
commissioning and troubleshooting. This section explains how to use it.
Frequency at
cursor position
Scan refresh
indication
Stop frequency
setting
Resolution bandwidth &
Sweep time readout
Uplink / Downlink
switch
Uplink / Downlink
switch
Input & Output
trace enable
Stop frequency
setting
Zero Span switch
Spectrum analyzer settings
Input and output signals are scanned successively and can be shown or hidden
independently:
Spectrum input/output selection
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Either uplink or downlink signal paths are chosen and average up to 32 can help to clean
noise signals. Resolution bandwidth and sweep time are set automatically.
Spectrum UL / DL selection
When start and stop frequencies are set equal, then zero-span mode is activated to show
evolution of signals with time, which may be of special interest with pulsed signals. The
same thing can be achieved by setting the zero-span checkbox, with the convenience that
start frequency change would also change stop frequency accordingly.
Spectrum zero-span mode
Resolution bandwidth becomes enabled in zero-span mode and sweep time is
automatically set according to its setting, which is user selectable between 25.000Hz,
12.500Hz, 6.250Hz and 3.125Hz. Average setting will also impact sweep time in a similar
way.
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Zero span settings
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13 SNMP Agent
Westell Signal Booster includes a SNMPv1 agent that allows user to supervise the device by
means of 'SET' and 'GET' type commands and, asynchronous traps to notify alarm conditions
can be sent. The device is intended to be monitored by a polling NMS but it can send traps to a
NMS or Trap Receiver if enabled. Westell can provide a NMS system upon request.
The following sections will show the user configurable, relevant information that can be read
via SNMP from the device. The tables will describe these values in order to explain how the
information has to be read and interpreted.
MIB Description
The associated MIB document is WESTELL-BDA-SYSTEMv13-MIB.mib. The Westell MIB is
divided into blocks. Each block describes the characteristics and values of a specific element
but not all elements are implemented in this agent. Each MIB block is divided in two segments,
named 1T and 2T. Segment 1T contains the information that is fixed & read only. Segment 2T
has the information that can vary over time, regardless of it being read/only or read/write.
The following sections will show the user configurable, relevant information that can be read
via SNMP from the device.
Manager
This is a table with 2 consecutive elements, one for each NMS. No checking is done of the
validity of the information stored in the table, so extra care must be taken by the user.
SNMP Managers table
Field Name
OID
Description
Type
Man2TAddress[0]
1.3.6.1.4.1.26355.2.50.3.2.1.2.
First NMS Address
R/W
Man2TAddress[1]
1.3.6.1.4.1.26355.2.50.3.2.1.2.
Second NMS Address
R/W
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Man2TPort[0]
1.3.6.1.4.1.26355.2.50.3.2.1.3.
First NMS Port where to send traps
R/W
Man2TPort[1]
1.3.6.1.4.1.26355.2.50.3.2.1.3.
Second NMS Port where to send traps
R/W
Man2TEnable[0]
1.3.6.1.4.1.26355.2.50.3.2.1.5.
First NMS. 1= Enabled, 2=Disabled
R/W
Man2TEnable[1]
1.3.6.1.4.1.26355.2.50.3.2.1.5.
Second NMS. 1= Enabled, 2=Disabled.
R/W
Man2TAliveNotificationPeri
od[0]
1.3.6.1.4.1.26355.2.50.3.2.1.6.
First NMS. If enabled in Man2TEnable,
defined time between keep-alive
traps.
R/W
Man2TAliveNotificationPeri
od[1]
1.3.6.1.4.1.26355.2.50.3.2.1.6.
Second NMS. If enabled in
Man2TEnable, defined time between
keep-alive traps.
R/W
The following MIB tree representation shows this table:
SNMP Managers table
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The following picture shows the same table as seen by the Westell NMS:
NMS: SNMP Managers table
Network
This is a table has just one element with two items. The first one is the device's IP address and
it is read-only to avoid unwanted miss-configuration. This can only be changed by means of the
embedded web server or locally, through USB, by means of the Westell Control Software. The
second item is a “kind” of button intended for resetting the embedded Ethernet hardware
interface.
SNMP Network table
Field Name
OID
Description
Type
Net2TIp[0]
1.3.6.1.4.1.26355.2.50.4.2.1.2.
IP address
R/O
Net2TResetNetwork[0]
1.3.6.1.4.1.26355.2.50.4.2.1.3.
Network reset: reads as idle(1), sets to
reset(2)
R/W
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The following MIB tree representation shows this table and following there is the NMS view:
SNMP Network table
NMS: SNMP Network table
Device
This is also a one element table, providing several informative fields, but only relevant and
implemented one is the “Location” field, which allows to easily identify a device by a name
provided by the user, usually related to the place where it is located.
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SNMP Device table
Field Name
OID
Description
Type
Dev2TPowerOn[0]
1.3.6.1.4.1.26355.2.50.5.2.1.2.
R/W
Dev2TLocation[0]
1.3.6.1.4.1.26355.2.50.5.2.1.3.
String with up to 30 characters
R/W
Dev2TConnectionStatus[0]
1.3.6.1.4.1.26355.2.50.5.2.1.4.
R/O
Dev2TMainPowerStatus[0]
1.3.6.1.4.1.26355.2.50.5.2.1.5.
R/O
Dev2TBatteryStatus[0]
1.3.6.1.4.1.26355.2.50.5.2.1.6.
R/O
Dev2TIsolationStatus[0]
1.3.6.1.4.1.26355.2.50.5.2.1.7.
R/O
Dev2TDoorStatus[0]
1.3.6.1.4.1.26355.2.50.5.2.1.8.
R/O
MIB tree view:
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SNMP Device table
The Westell NMS view shows this table under the tab named “info”:
NMS: SNMP Device table
Additional information is shown by clicking on the link named “Description”. This extra piece of
information comes from the fixed table, Dev1Table. The most relevant items in this table are
the following ones:
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SNMP Device Group table
Field Name
OID
Description
Type
Dev1TGroup[0]
1.3.6.1.4.1.26355.2.50.5.1.1.3.
das.info (conformance group)
R/O
Dev1TurlExtern[0]
1.3.6.1.4.1.26355.2.50.5.1.1.1
9.0
URL of embedded web server
R/O
Alarms
Alarms tables provide information regarding the status of key parts in the system. The fixed
table gralAlarm1Table provides self-explanatory identifiers, gralAlarm1TId, for each relevant
subject. The second item in each element of this table is the gralAlarm1TGroup. When the
device being monitored is a Remote unit, this item just takes the value 'das.alarms '. However,
since the Master unit carries information from all the devices in the whole DAS system, it
provides a different value for each device to which the alarm is assigned to, be it the Master
unit, any of the Remote units or any of the Expansion units. Therefore, the actual number of
elements in this table for the Master unit, depends on how many devices compose the DAS
system. The third item of each element, gralAlarm1TDescription, is left blank, since the first
one suffices for that purpose.
SNMP Alarm Group table
Field Name
OID
Description
Type
GralAlarm1TId[0]
1.3.6.1.4.1.26355.2.50.13.1.1.
2.0
Descriptive identifier string
R/O
GralAlarm1TGroup[0]
1.3.6.1.4.1.26355.2.50.13.1.1.
3.0
Conformance group for general alarms
R/O
GralAlarm1TDescription[0]
1.3.6.1.4.1.26355.2.50.13.1.1.
4.0
R/O
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The alarm identifiers available are the following ones:
•
•
•
•
•
•
•
•
•
•
•
AlarmGeneralFail
Board malfunction that cannot be determined.
Digital signal processor failure.
AlarmHwFail
AlarmRxLow
No input signal is detected in the downlink direction in any of the
activated filters. Aside from a faulty part, as the donor antenna or RF cable, this also might be
caused be a problem with the base station or frequency configuration. Notice also that signal
detection is dependent on squelch threshold setting. Because of that, this is considered a warning
instead of an alarm.
AlarmTempHigh
High device temperature (over 85ºC).
AlarmOverloadUplink Excessive RF input signal in UL.
AlarmOverloadDownlink Excessive RF input signal in DL.
AlarmTxLowDownlink Detected RF output power much lower than expected. Since output
power measurement is performed by the dedicated monitoring board, a fault in that board would
make this item be set as Unavailable and AlarmPAFaultDownlink set to true.
AlarmTxHighDownlink Excessive RF output power detected (3dB higher than rated). This is most
likely due to bad gain settings, since AGC would limit output power otherwise.
AlarmPAFaultUplink
Uplink Power Amplifier failure. This alarm is available for certain amplifier
types only, and for the rest an 'unavailable' status is set in the next table.
AlarmPAFaultDownlink Downlink Power Amplifier failure. A communication failure with the
dedicated monitoring board itself, throws this alarm, too.
AlarmVswr
RF mismatch of PA output is detected. Since VSWR measurement is
performed by the dedicated monitoring board, a fault in that board would make this item be set
as Unavailable and AlarmPAFaultDownlink set to true.
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SNMP Alarms Group table
On the other hand, the mutable table gralAlarm2Table provides the actual status of each
alarm. This table has one element for each element in gralAlarm1Table. Each element has two
items. The first one is a status identifier, gralAlarm2TStatus, be it 'ok', 'warning', 'fail' or
'unavailable'. The second item is a short description of the fault, mainly for human readability.
SNMP Alarm table 2
Field Name
OID
Description
Type
GralAlarm2TStatus[0]
1.3.6.1.4.1.26355.2.50.13.2.1.
2.0
Status enumeration
R/O
GralAlarm2TEventDescriptio
n[0]
1.3.6.1.4.1.26355.2.50.13.2.1.
3.0
Short descriptive string
R/O
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The next picture is the MIB tree view of this table, and the Westell NMS provides a combined
view of both tables and groups alarms:
SNMP Alarms table
NMS: SNMP Alarms table
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14 SNMP Traps
General Explanation
For any event that may set or clear an alarm in the gralAlarm2Table, there is a SNMP trap that
may be sent by the embedded SNMP agent to the manager, if enabled. Therefore, the list of
traps closely reassembles the entries in the alarms table. Furthermore, there is also a keepalive trap for letting the SNMP manager that the agent is working, in case that polling is not
being done.
Each trap message has the following fields (except for the keepAlive trap, whose only object is
the agent's IP address
•
•
•
An identification number associated to the event being signaled.
A severity indication number.
A short string description for human readability.
The following list gathers all the available identifiers:
SNMP Trap descriptions and Enterprise Specific IDs
Source event
Description
ID
System sends this trap periodically. Period is set with KeepAlive Period setting of the trap manager. When this trap is
thrown, the trap counter is not incremented. It is always in
cleared state.
This trap indicates that the board controller is not responding
to the remote supervision system.
Hardware Failure
This trap indicates malfunction related the Digital Signal
Processor.
Rx Input Low DL
Downlink input signal is not detected in any active filters.
10
Internal repeater temperature exceeds +85ºC.
11
Rx Overload UL
Uplink RF input level overload
20
Rx Overload DL
Downlink RF input level overload
21
Detected Downlink RF output power is lower than expected.
30
Keep-alive
General Failure
Temperature
Tx Low DL
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Source event
Description
ID
Tx High DL
Downlink RF output power too high
31
PA Fault UL
Alarm for the UL Power Amplifier if available.
40
PA Fault DL
Alarm for the DL Power Amplifier. It may be caused by communication
error with PA monitoring module.
41
Excessive DL output reflected power: antenna mismatch.
50
VSWR
As it turns out from this list, there is a one-to-one relationship between events triggering traps
and their notification identifiers. But the trap identifier does not tell whether the event was to
trigger the alarm state or to cancel it. That is the purpose of the severity identification number
in the trap message. The following table lists the severity numbers used:
SNMP Trap status binding
Severity
Description
StatusID
Trap status
binding
Binding string
CRITICAL
System malfunction comes into effect
fail
WARNING
System warning comes into effect.
warning
CLEARED
System malfunction or warning is
canceled.
ok
System state cannot be determined
99
unavailable
UNAVAILABLE
The character string attached to each trap message includes both a short event description
plus a severity description such as “OK” or “FAIL”. As an example, the following picture shows a
snapshot of a trap receiver getting traps from a unit at address 172.18.21.10. The time-stamp
shows time since system boot and SNMP Version is '1'. The severity is set to 'warning'.
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SNMP Trap in trap receiver
Example trap capture
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SNMP Trap capture
Trap data explained:
Enterprise: .1.3.6.1.4.1.26355 (Westell Inc.)
BDA System MIB: .1.3.6.1.4.1.26355.2.50 (applicable to BDA system)
Enterprise specific trap number: 10 (meaning 'Rx Input Low DL' according to the table of trap
identifiers).
Trap Bindings
1) gralAlarm2TStatus. Value: 2 (see table below)
2) gralAlarm2TEventDescription: Value: “RX LOW DOWNLINK - WARNING”
The first binding in the trap is the gralAlarm2TStatus of gralAlarm2T table in the MIB:
gralAlarm2TStatus OBJECT-TYPE
SYNTAX INTEGER { ok(1), warning(2), fail(3), unavailable(99) }
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"-"
::= { gralAlarm2TableEntry 2 }
and its equivalence to the trap severity is explained in the table shown in previous section.
The second binding is the string used to be human-readable. The only different type of trap is
the keep-alive one, which as an example is shown in next picture:
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SNMP Keep-alive trap capture
and its only binding is the net2TIp part of the net2Table in the MIB
net2TIp OBJECT-TYPE
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"-"
::= { net2TableEntry 2}
List of traps
The following table lists all bindings in each trap for convenience:
SNMP Trap list
Source event
Specific Trap ID
Bindings
Value
Keep-alive
1.3.6.1.4.1.26355.2.50.4.2.1.2.0
Ip Address
General Failure
1.3.6.1.4.1.26355.2.50.13.2.1.2.0
{1, 2, 3, 99}
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Source event
Specific Trap ID
Hardware Failure
Rx Input Low DL
10
Temperature
11
Rx Overload UL
20
Rx Overload DL
21
Tx Low DL
30
Tx High DL
31
PA Fault UL
40
PA Fault DL
VSWR
41
50
Bindings
Value
1.3.6.1.4.1.26355.2.50.13.2.1.3.0
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.1
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.1
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.2
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.2
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.3
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.3
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.4
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.4
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.5
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.5
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.6
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.6
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.7
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.7
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.8
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.8
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.9
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.9
String
1.3.6.1.4.1.26355.2.50.13.2.1.2.10
{1, 2, 3, 99}
1.3.6.1.4.1.26355.2.50.13.2.1.3.10
String
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UHF Product Manual
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Appendix A
Important Product Information
A.1 Registration Number
FCC – NVRPSA91080-UHF
A.2 UL
This product is UL Listed.
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Appendix B
Acronyms and Abbreviations
Table B-1 contains the acronyms and abbreviations used in this manual, along with a definition for
each one.
Table B-1: Acronyms and Abbreviations
AGC
AMPS
ARFCN
BCCH
BS
CDMA
DC
DCS
DL
DPLX
EEPROM
EGSM
ETACS
ETSI
WCS
GSM
HW
LED
LNA
MS
OL
OMS
PA
PCN
PCS
pWOMS
PS
RF
RSSI
SW
UL
WEEE
Automatic Gain Control
Advanced Mobile Phone Service
Absolute Radio Frequency Channel Number
Broadcast Control Channel (GSM broadcast channel time slot)
Base Station, BS antenna = towards the base station
Code Division Multiple Access
Direct Current
Digital Communication System (same as PCN)
Downlink signal direction (from base station via Signal Booster / Master / Remote to mobile
station)
Duplex filter
Electrical Erasable Programmable Read Only Memory
Extended Global System for Mobile communication
Extended Total Access Communication System
European Telecommunications Standard Institute
Westell Control Software
Global System for Mobile communication
Hardware
Light Emitting Diode
Low Noise Amplifier, uplink and downlink
Mobile Station, MS antenna = towards the mobile station
Overload
Operation and Maintenance System
Power Amplifier
Personal Communication Network (same as DCS)
Personal Communication System
Portable Westell Operation and Maintenance Software
Power Supply
Radio Frequency
Received Signal Strength Indication
Software
Uplink signal direction (from mobile station via Signal Booster / Master / Remote to base station)
Waste of Electric and Electronic Equipment
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