Perytons
Frequently Asked Question
Last updated April 25, 2008
Comercial
Technical
Commercial
Q:
How can I tell which product is best for
my needs?
A:
•
If you do not need capture capability, but need to analyze data already
captured by others in the field or lab,
then the Peryton-V will meet your needs.
•
If you need to capture and analyze a single network with a known
channel, or if 'active scan' or 'passive scan'
are sufficient to provide channel
information, and if you can bear some packet loss due to RF
interference, the
you can use the Peryton-S.
•
If you need to analyze a single network, but want high reliability, or
if you work in a tough RF environment, then
the Peryton-D is your best choice.
• If you need to analyze a complex
environment with multiple networks, or need to make sure a device under
testing doesn’t transmit out of range,
or don't want to use active scan to detect the channel chosen by the
network, then you need the high-end
Peryton-M product
• If you have your proprietary protocol
on top of the 802.15.4 PHY and MAC layers or ZigBee NWL and APS
layers, then you need the Peryton-C.
Contact Perytons for possible customization services.
The
Perytons team will be happy to assist you in understanding your exact
need, and finding which of the product suits you best. Back....
Q:
The system I am analyzing doesn’t use
diversity. Do I still benefit by using the diversity option of the
Perytons™ analyzer?
A: 802.15.4 networks will rarely use
antenna diversity since this increases the system cost and power
consumption. Instead, a typical application will use retransmission to
compensate for packet loss due to RF interference and multi-path
propagation conditions.
For
best analysis capability, you want to capture all messages transmitted
by the system under test. The use of antenna diversity by the analyzer
allows a significant decrease in the number of packets missed by the
analyzer due to interference. In an indoor environment this improvement
may reduce packet loss from 2-5% in a single antenna analyzer down to
0.1%! Back....
Q:
My free evaluation period has expired.
What are my options?
A: The Perytons analyzer free evaluation
is for a
period of 30 days. After this period expires, you should purchase a
licensed version of the product from Perytons. Alternatively, you may
request a 30-day extension of the free evaluation. Such an extension
request will typically be approved one time. Back....
Q:
What are the differences between the
free evaluation version and licensed version?
A: Some of the Perytons analyzer
features are disabled or limited in the free evaluation version, such
as:
• The free evaluation is limited to 30 days
• The maximum number of messages that can be viewed
/ analyzed is limited to 15
• Only one USB dongle is supported, allowing capturing data
from
a single channel only
The
channel number is hard coded to channel #11
• The diversity option is not supported
• Some of the beacon options are disabled
Back....
Technical
Q:
I am pressing the Beacon icon in the
Time View window but see no beacon gridlines?
A: This can happen for one of three
reasons:
• The captured
data doesn’t include any valid beacon information. You can verify that
by searching for
messages with
MacBcn field “Exists”.
Note that only messages with good FCS are used for drawing
beacon
gridlines.
• The
captured data includes beacon information, but from a wrong coordinator
ID. Use Tools/Settings, and
make
sure the selection for beacon gridlines is either “All” or “First”.
• Compress
time option in the Time View menu is chosen. In this case, all time
gaps between messages are
squeezed and beacon gridlines are not displayed. Back....
Q:
Why is the number of dongles shown in
the Data
Capture form smaller than the number of dongles I actually
have?
A: Press the “Refresh dongles” button,
and wait for
few seconds. If the number of dongles displayed is still smaller than
the number of actual dongles, take out the dongles, insert them again,
wait for few seconds, and press the “Refresh dongles" again.
Note
that in case multiple dongles are connected to the computer using a USB
hub, disconnecting the USB cable is not sufficient because the dongles
get their power from the hub. Take out the USB cable, then disconnect
the USB hub power. Then connect the power again, and then reconnect the
USB cable. Back....
Q:
How do I share a captured scenario with others?
A: If you just want to let someone
analyze the same
data, send him the data capture file (with extension .anl). If you
don’t remember the file name or location, go to Settings in the Tools
menu. Using a file compressor may significantly reduce the file size.
If
you want to share an interesting scenario with others, make the
relevant scenario visible on your screen (e.g. open the relevant
messages in Message View, expend the relevant parts, add meaningful
bookmarks to the Time View, set the right Time View zoom, etc.). Then
choose “Save” or “Save As…” from the File menu (or use the save icon).
The current workspace will be saved with a .wrk extension. Send your
colleague both the .wrk and .anl files.
In order to view the
captured data, the recipient must have a licensed version of the
Perytons analyzer. Alternatively, a free evaluation version can be used
to view and analyze small files with up to 15 messages. Back....
Q:
Does the Perytons Analyzer support upper layers protocols such
as JenNet and MiWi?
A: The current version of the Perytons
analyzer
supports the 802.15.4 PHY and MAC layers, as well as ZigBee NWL or
APS network and application support layers. Additional
protocols
may be added in future versions.
The
Peryton-C allows customers to build their own protocol into the Peryton
analyzer, so customers may add the protocols mentioned above, or any
other protocol. Back....
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