B&K Precision 2650A, 2652A Data Sheet

Data sheet

Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz

Models 2650A, 2652A, 2658A

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 measure­ments in the 50 kHz to 8.5 GHz range.

Applications

■ Installation, maintenance, and troubleshooting

f wireless communication systems such as

o

W-CDMA/CDMA, GSM, WLAN, WiMAX and

Bluetooth

■ Frequency response measurements of passive

components such as RF cables, filters, and

attenuators (model 2652A)

■ 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)

■ Magnetic field strength measurement with

magnetic field probe (PR 26m)

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.

■ Fast sweep speed, minimum 10 ms, to help

locate and identify elusive, transient

interference signals

■ DANL (displayed average noise level) of

-127 dBm

■ Single sideband phase noise – 90 dBc @

100 kHz offset

Key features and benefits

■ Frequency range from 50 kHz – 3.3 GHz or

.5 GHz

8

■ 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)

■ 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)

■ 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

■ Convenient Auto Tune function automatically

sets center frequency to the maximum signal

within full span and optimum settings for RBW,

VWB and sweep time

■ External trigger for zero span measurements

■ SCPI-like remote control commands

Model Frequency Range

2650A 50 kHz – 3.3 GHz
2652A 50 kHz – 3.3 GHz

with Tracking Generator

2658A 50 kHz – 8.5 GHz

Technical data subject to change
© B&K Precision Corp. 2008

v092409

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Tel.: [phone]

Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz

odels 2650A, 2652A & 2658A

M

▲

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

Automatically tune to maximum
level with full span

Set sweep time and detection mode

2, 5 and 10 dB/div

Store screen images in bitmap format
to flash drive or hard copy to USB
printer

Set reference level from +1 dBm
to -60 dBm in 1 dB steps

Measurement functions:

• Channel power

• Adjacent channel power

• Occupied bandwidth

• Electric field strength

• Magnetic field strength

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

Enter custom labels for filenames,
set the time and date

▲

Interface

External trigger
input (SMA)

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PC interface - USB
device (A plug)

USB host adapter for
USB flash drives

Charge status indicator

Rotary knob for parameter selection

DC power input

Handheld Spectrum Analyzers, 3.3 GHz & 8.5 GHz

odels 2650A, 2652A & 2658A

M

Versatile measurement functions

▲

Channel power measurement

Allows you to measure the total power or
noise power in a user-specified

andwidth.

b

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 spec­trum), peak power (reference level) and in-band
power (user-specified band width).

Electric field strength measurement

A dipole antenna (options M401 – M406)
connected to the RF input enables the measure-

ent of electric field strength. Users can choose

m
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

Bluetooth systems and systems using direct
sequence spread spectrum/frequency hopping
modulation techniques.

Magnetic field strength measurement

Using a magnetic field probe (option PR 26M),
the 2650A series is capable of accurately

easuring the magnetic field distribution on a

m
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.

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.

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.

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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