Data sheet
Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz
Models 2650A, 2652A, 2658A
Applications
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Key features and benefits
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Installation, maintenance, and troubleshooting
of wireless communication systems such as
W-CDMA/CDMA, GSM, WLAN, WiMAX and
Bluetooth
Frequency range from 50 kHz – 3,3 GHz or
8.5 GHz
A truly portable spectrum analyzer weighing
only 1.8 kg including the battery
Impressive 4 hour battery life; easy-to-replace
rechargeable Lithium-Ion battery
Built-in tracking generator to rapidly determine
transmission characteristics of 2 port devices
(model 2652A)
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Frequency response measurements of passive
components such as RF cables, filters, and
attenuators (model 2652A)
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Detection of signal interference and undesired
emissions
TV and broadcasting
Antenna alignment
Electric field strength measurement with dipole
antennas optimized for typical frequencies used
in wireless systems (order M401-M406)
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USB interface for PC connectivity
Intuitive PC Software for remote control and
documentation of measurement results
Conveniently store measurement results and
screen shots in bitmap format to USB flash
drive (USB host interface)
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Magnetic field strength measurement with
magnetic field probe (PR 26m)
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Large easy-to-read color display (TFT LCD),
640 x 480 resolution
Measurement functions: channel/adjacent
channel power, occupied bandwidth, electric
and magnetic field strength
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Truely portable solution for quick
and precise spectrum analysis
B&K Precision’s 2650A series handheld
spectrum analyzers are compact, light weight,
and cost-effective spectrum analyzers for quick
and precise signal investigations, especially away
from the bench. At a weight of only 1.8 kg
(4 pounds), the 2650A series are by far the
lightest full-featured spectrum analyzer
available, yet they deliver performance and
features comparable to full-size bench spectrum
analyzers and can operate up to 4 hours on a
single battery.
With their ease of use, measurement flexibility,
and unmatched portability, the 2650A series
analyzers are indispensible tools for engineers
and technicians who conduct field measure-
ments in the 50 kHz to 8.5 GHz range.
Model
2650A
2652A
2658A
Frequency Range
50 kHz – 3.3 GHz
50 kHz – 3.3 GHz
with Tracking Generator
50 kHz – 8.5 GHz
Superb performance improves your
productivity
Advanced synthesizer-based design enables the
2650A series to provide you with an accurate
and detailed picture of the spectrum you are
investigating.
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Convenient Auto tune function automatically
sets center frequency to the maximum signal
within full span and optimum settings for RBW,
VWB and sweep time
Fast sweep speed, minimum 10 ms, to help
locate and identify elusive, transient
interference signals
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External trigger for zero span measurements
SCPI-like remote control commands
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DANL (displayed average noise level) of
-127 dBm
Single sideband phase noise – 90 dBc @
100kHz offset
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Technical data subject to change
© B&K Precision Corp. 2008
v040109
w w w.bk prec ision.c om
Tel.: 714.921.9095
Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz
Models 2650A, 2652A & 2658A
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Front panel
Large color screen (640 x 480 pixels) can be
switched to high contrast monochrome display
in extreme sunlight
RF Input (N-connector), able to withstand
27 dBm (CW average power)/25V DC max
Simple menu-based operation via
soft keys
Set reference level from +1 dBm
to -60 dBm in 1 dB steps
Automatically tune to maximum
level with full span
Measurement functions:
• Channel power
• Adjacent channel power
• Occupied bandwidth
• Electric field strength
• Magnetic field strength
Set sweep time and detection mode
Calculation functions:
• Max hold
• Min hold
• Averaging
• Overwrite
Save/Load trace data and setups
to/from internal memory or USB
flash drive
Marker measurement and peak
search
Rotary knob for parameter selection
2, 5 and 10 db/div
Store screen images in bitmap format
to flash drive or hard copy to USB
printer
Enter custom labels for filenames,
set the time and date
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Interface
External trigger
input (SMA)
PC interface - USB
device (A plug)
USB host adapter for
USB flash drives
Charge status indicator
DC power input
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Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz
Models 2650A, 2652A & 2658A
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Versatile measurement functions
Channel power measurement
Allows you to measure the total power or
noise power in a user-specified
bandwidth.
Electric field strength measurement
A dipole antenna (options M401 – M406)
connected to the RF input enables the measure-
ment of electric field strength. Users can choose
from 6 antennas based on the frequency range
under investigation. Each antenna’s resonance
point is optimized for the frequency spectrum of
a specific wireless standard:
• M401 is suitable for GSM 850/900
• M403 for W-CDMA and GSM 1800/1900
• M404 for 2.4 GHz wireless LAN and
Bluetooth
• M406 for 5 GHz wireless LAN
Combined with the MAX HOLD function and a
10 ms sweep time, the M404 dipole antenna is
capable of measuring the electric field strength of
Magnetic field strength measurement
Using a magnetic field probe (option PR 26M),
the 2650A series is capable of accurately
measuring the magnetic field distribution on a
PCB (printed circuit board) or IC (integrated
circuit). The magnetic field strength detector
inside the probe consists of a shielded loop
structure using a glass ceramic multi-layer board
technology with high frequency characteristics.
This enables the detection of magnetic field
components only. The probe can measure over a
wide frequency range of 10 MHz to 3 GHz.
Since the probe’s compensation data is already
preloaded into the analyzer, the magnetic field
strength is displayed directly in dBuA/m.
Adjacent channel power
Measure the ratio of power leakage (from the
wanted signal) into adjacent channels. Center
frequency, adjacent channel bandwidth, and
offset between main carrier and adjacent
channels can be set.
Users can select from any of the following three
measurement methods based on the reference
carrier definition: total power (of displayed spec-
trum), peak power (reference level) and in-band
power (user-specified band width).
Bluetooth systems and systems using direct
sequence spread spectrum/frequency hopping
modulation techniques.
Using multiple dedicated dipole antennas leads
to better measurement results compared to the
conventional method of using only a single wide
band antenna in which case the frequency range
under investigation is typically located far away
form the antenna's resonance point, resulting in
poor dynamic range. Measuring at or near the
resonance point where the antenna gain is at a
maximum translates into high dynamic
measurement range.
Typical applications of this magnetic field probe
are evaluation of the effectiveness of a bypass
capacitor located near the power supply terminal
of an IC or evaluation of the microstrip layout on
a PCB. Due to the probe’s high spatial
resolution (approximately 0.25 mm), it is not
affected by adjacent patterns.
Occupied Bandwidth
This measurement calculates the bandwidth
containing the total integrated power occupied in
a given signal bandwidth. Two measurement
methods are available: The user can specify N%
of total power or the X dB down point relative to
the carrier peak level.
Since the antenna gain factor compensation data
is preloaded into the analyzer, the field strength
is displayed directly in dBuV/m. The analyzers
also support downloading of user-defined gain
factor tables for custom antennas.
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Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz
Models 2650A, 2652A & 2658A
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Calculation and Marker functions
Max and Min Hold
Max Hold: At each displayed frequency, the
currently-measured value is compared to the
previously-measured value and the larger one is
retained and displayed. This feature is useful for
observing a bursted or intermittent signal or for
measuring the electric field strength of systems
using direct sequence spread spectrum/frequency
hopping modulation techniques.
Overwrite
The results of each consecutive sweep are
displayed and the screen is not cleared after each
sweep. This lets you observe the long term
variations of a signal.
Peak Function
Two different modes are available for peak
search:
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Normal peak search mode searches for the
highest level on the screen. In this mode, you
can also use the NEXT button to locate the
marker on the next smaller peak.
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In-zone peak search mode searches for the
peak level in the range specified by the center
value and width.
Min hold: At each displayed frequency, the
currently-measured value is compared to the
previously-measured value and the smaller one is
retained and displayed.
In both cases, the number of sweeps can be set
to 2
N
, where N is from 1 to 10 or infinite.
Marker Function
Two different modes are available for marker
measurements:
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Normal marker mode measures the
frequency and level of the marked point
■
Delta marker mode measures the frequency
and level differences between the two
markers (see image)
The picture shown demonstrates in-zone peak search.
Averaging
The analyzer continuously sweeps, then
calculates and displays the average value over the
total number of sweeps. The number of sweeps
can be set to 2N, where N is from 1 to 10.
Averaging is useful for detecting signals buried in
the noise floor because random noise is averaged
out.
Delta marker measurement
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Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz
Models 2650A, 2652A & 2658A
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Easy operation
The 2650 series handheld spectrum analyzers
are straightforward to operate and provide many
functions to facilitate quick and easy
measurements:
Smart one button “Auto Tune" function which
automatically scans the full frequency range,
detects and centers the maximum signal, and
configures optimum values for RBW, VBW,
sweep time and reference level
Input attenuator and internal preamp are set
automatically to optimal values based on the
reference level
Easy configuration of frequency, span, and
amplitude
Marker and peak search functions enabling
rapid measurements
200 setups and reference spectrum
measurements can be stored and recalled from
either internal memory or USB flash drive
Filenames can be customized and include a
date and time stamp.
Large easy-to-read display. The backlight is
adjustable and monochrome mode can be
used for extreme lighting conditions
Long battery life
The 2650A provides a battery operating time of
up to 4 hours (approximatly 3 ½ hours with
back light set to typical settings). Battery
replacement is simple and doesn’t require any
hand tools. To fully charge the lithium-ion
battery takes only approximately 4 hours
(analyzer must be turned off). A two color LED
indicates the charging status “charging”, “charge
completed”, “no battery detected” and “charging
error”.
Detect the maximum
level within full span.
Center the maximum signal, configure
optimum parameters
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Simple and flexible documentation of your measurements
PC software
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Capture 1001 trace data points (twice the
number of display dots) and store the data in
CSV (comma separated values) format for
detailed analysis (e.g., import into a spread
sheet)
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Save the screen to a bitmap file or to the
clipboard
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Control all instrument settings from the PC
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Download custom antenna gain factor
compensation data to the instrument
Conveniently save measurement data
to USB flash drive
Easily save and recall measurement data and set-
tings in CSV format directly to and from the USB
flash drive. Filenames can be customized and
have a time and date stamp. Users can choose
to store measurement data and setups in sepa-
rate files or combined in one file.
Using the Copy function, a screen image in
bitmap format (BMP) can be directly stored to
the USB drive. CSV data residing in internal
memory can be stored to the USB drive in a
lump sum.
The 2650A series includes easy-to-use software
for documentation and further analysis of your
measurements. Connect the analyzer via USB
cable to your PC, configure the analyzer remote-
ly, then download measurement data and instru-
ment settings for storage and further analysis.
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Continuously sweep and transfer trace data
to the PC.
Hardcopy to USB printer
Generate a hard copy of the display by directly
connecting the optional USB printer to the
2650A series analyzer.
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