HP (Hewlett-Packard) YELLOWJACKET PLUS Manual De Usuario
Page 5
Full Spectrum Mode
The full spectrum screen has
three available TRACES
. These
traces can be
PEAK HOLD
and
VISIBLE/INVISIBLE
. Only one
trace can be active at any time. The buttons on the screen
below the graph change the settings on the spectrum screen.
below the graph change the settings on the spectrum screen.
There is also a
PEAK SEARCH
button that will put a diamond
on the highest point in the spectrum at that time. RSSI and
frequency information for that point will then be displayed on
top of the graph.
frequency information for that point will then be displayed on
top of the graph.
The
BLINKING HEART
on the top right indicates an active
802.11b signal. This icon also applies to the other spectrum
and multipath screens.
and multipath screens.
There is a highlight bar that allows the user to select a par-
ticular channel. This is navigated by use of the joystick and/or
arrow buttons on the menu. After highlighting a particular
channel, the user may enter into single channel spectrum
mode by pressing the UP arrow on the joystick or the UP arrow
on the menu bar.
ticular channel. This is navigated by use of the joystick and/or
arrow buttons on the menu. After highlighting a particular
channel, the user may enter into single channel spectrum
mode by pressing the UP arrow on the joystick or the UP arrow
on the menu bar.
You may take a snapshot of the full spectrum screen by press-
ing the
ing the
CAMERA BUTTON
on the menu bar. The data for the
screen will then be stored along with RTC or GPS information.
The PC Snapshot Viewer Utility will allow you to view these
snapshots on the PC and then print them out on a printer.
The PC Snapshot Viewer Utility will allow you to view these
snapshots on the PC and then print them out on a printer.
Single Channel Spectrum
Single channel spectrum mode works exactly like the full
spectrum mode with the exception that you are now zoomed
in to a single 802.11b channel.
spectrum mode with the exception that you are now zoomed
in to a single 802.11b channel.
NOTE:
802.11b traffic will be seen in bursts on the spectrum
screen. The energy will only rise as packets are transmitted.
You will see a constant RSSI level in the AP screens because
the RSSI measurement is synchronous with the reception of the
packet. The spectrum screen is sweeping the frequency band
because it is looking for ALL 2.4GHz energy, not just 802.11b
packets. In this way, interferers will also appear. It sweeps as
fast as it can, but if a packet is transmitted while the sweep is
at another frequency, the energy will not be seen.
You will see a constant RSSI level in the AP screens because
the RSSI measurement is synchronous with the reception of the
packet. The spectrum screen is sweeping the frequency band
because it is looking for ALL 2.4GHz energy, not just 802.11b
packets. In this way, interferers will also appear. It sweeps as
fast as it can, but if a packet is transmitted while the sweep is
at another frequency, the energy will not be seen.