Atec Agilent-N9340B - Manual (Page 4)

04
Handheld Spectrum Analyzer (HSA)
N9340B
Spectrogram
Now you can take advantage of the
spectrogram display to view the behavior of
varying signal parameters over time. The
N9340B includes spectrogram as a standard
feature. The scrolling three-dimensional display
is noted for its ability to track the frequency and
power behavior over the time, particularly
intermittent signals. The user can use
spectrogram to analyze the stability of a signal
over the time, or to identify intermittent
interference signals in communications systems.
There are two markers for the user to identify
power versus frequency and time. Also the time
interval between two consecutive colored rows
can be adjusted. When a marker is put on the
spectrogram, the N9340B can display the trace
for the time of the selected marker.
The spectrogram data and screenshots can be
saved and recalled for later analysis or reporting.
Extended spectrogram monitoring
(Option INM)
Option INM extends the N9340B spectrogram
capability further with the ability to continuously
monitor and save spectrogram data over time
not only to the analyzer’s internal memory or a
USB flash drive, but also directly to a PC. With
option INM users can save more than 1,500
continuous frames of data depending on the
size of the USB flash drive or PC memory.
Option INM also supports an Automatic Save
function. The N9340B can save the spectrogram
at a user specific time or at a set interva of l
frame.
.
All the small files with the same
prefix can be combined into one file using
N9340 PC Software, making analysis easier.
The user can choose among the 3 display
modes: spectrogram only, spectrum trace only
or the combination of a spectrogram and a
spectrum trace in one screen. Limit lines with
pass/fail functionality is also available in this
measurement. The N9340B will identify the
failed frame of spectrogram data with a red
mark. The Pass/Fail test can also provide alerts.
Users may use marker to find the previous/next
frame failed data to quickly find the offending
event or interference. The spectrogram data may
be played back for review on either the analyzer’s
display or on a PC utilizing N9340B PC Software.
With the option INM, the Agilent N9340B
spectrum analyzer can provide unattended
monitoring of communication systems capturing
performance or intermittent events like
interference over extended periods of time –
days rather than hours. The option INM can
provide additional value for the wireless network
DSL measurements
(Option XDM)
The spectrogram gives the three-dimensional
display of power, frequency and time.
The N9340B INM shows spectrogram and spectrum trace
on the same screen.
important application of spectrum
N9340B is now equipped with powerful
features to address field applications
using a handheld spectrum analyzer. An
analysis is identifying interfering signals.
These often arise from illegal transmissions,
and may cause impairment of services for
authorized users, often resulting in financial
loss. These interfering signals could
possibly restrict critical communications
of civil aviation and emergency services,
which could jeopardize public safety.
Aerospace & Defence: radio and radar test, interference analysis,
on-site repair
Wireless Service Providers: interference analysis, on-site repair
TV & Broadcasting: interference analysis, channel power check
Spectrum Management Authority: spectrum monitoring
N9340B Applications for Field Test
communication system managers, hospital
administrators, etc. as well as police and
homeland security by recording spectrogram
measurement results over time.
xDSL (ADSL and VDSL) is widely used for
broadband internet connections at homes and
businesses. Service providers occasionally face
problems with interference on their xDSL lines.
The interference is mainly intermittent intrusion
from nearby external sources such as electric
motors, elevators, and appliances. In order to
monitor, capture and remove intermittent
interference, the engineer may need to work in
the field for extended periods of time.
With hardware option XDM the N9340B now
supports measurements on ADSL, ADSL2+ and
VDSL networks. It provides very good sensitivity
with low displayed average noise levels (DANL)
to meet the mask requirements overADSL frequency
ranges, from 9 kHz to 12 MHz, for ADSL.