BK Precision 2650 Datasheet

3.3GHz Spectrum Analyzer

2650

Optimum for

evaluation of

W-CDMA

CDMA

GSM

PDC
PHS

Wireless LAN

Bluetooth

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FEATURES 2650

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1 Compact and lightweight 3.75 lb (1.7 kg)

The dimensions are as small as WxHxD 6.4 x 2.75 x

10.25” (162 x 70 x 260 mm), and the weight is only

3.75 lb (1.7 kg) including the battery. It is very convenient
for outdoor use and while on business trips.

2 Measuring frequency range 50kHz to

3.3GHz

This bandwidth covers those of W-CDMA, CDMA, PDC,
PHS, GSM, 2.4GHz band wireless LAN,
Bluetooth.

3 Operation with battery for 100 minutes

When the battery is fully charged, Model 2650 operates
for about 100 minutes (with the back light turned off). It is
extremely convenient for outdoor use and for measuring
wireless LAN installation environment.

4 P

erformance that is compar

able to large-

siz

e bench type

Model 2650 guarantees a highly stable frequency axis by
PLL synthesizer system. The center frequency setting
resolution is 100kHz. Furthermore, the average noise
level of -110dBm (typical) provides a wide dynamic range
and the reference level can be set in 1 dB step.

5 Abundant functions

❑ Measuring functions

● Channel power measurement

● Adjacent channel power measurement

● Occupied bandwidth measurement

● Electric field strength measurement

● Magnetic field strength measurement

❑ Calculation functions

● MAX HOLD

● MIN HOLD

● AVERAGE

● OVER WRITE

❑ Marker and peak search
❑ Save / Load

● Electric field strength meas. ··· Optimum for

measurement of cellular phone and wireless

LAN working environment.

● Magnetic field strength meas. ··· Optimum for EMI

design of PCBs and for evaluation of
signal quality.

6 Auto tuning

The center frequency is set at the spectrum of the
maximum level in the 3.3GHz band, and in addition,
optimum reference level, resolution bandwidth, video
bandwidth and sweep time are set when the AUTO TUNE
key is pressed. This function is very convenient for
measurement of an unknown signal.

7 Auto range opera

tion

The resolution bandwidth, video bandwidth and sweep
time are automatically set based on the frequency span.
It is also possible to set auto range operation only one or
two out of resolution bandwidth, video bandwidth and
sweep time.

8 Har

d copy of the image

Connect a printer (PT 2650 optional) and press the
PRINT key on Model 2650. The image on the screen is
printed as it is.

9 High resolution display on the PC screen

The spectrum waveform is displayed at high resolution,
1000 points in the horizontal axis, on the PC screen when "PC
Software AK 2650" (optional) is used.

Model 2650 is a compact, lightweight, high per­formance spectrum analyzer that provides signal
analysis and functionality comparable to larger
bench type models.

Measuring functions 2650

Channel power measurement

Measures the sum of the power in
the zone specified by the zone
center and zone width (slash area
in figure). In short, it is possible to
measure the total power in the
specified frequency band. Of
course it is possible to measure
the noise power.

Adjacent channel power measurement

Capable of measuring the adjacent
channel power leakage as the ratio
of the power in the range specified
by offset frequency and bandwidth
(slash area in figure) to the carrier
wave power. Both the upper and
lower side power leakage are
measured.
Furthermore, the method for meas­urement may be selected out of three methods, i.e.,
total power method, reference level method and in­band method, from the classification of definition of
carrier wave power.

Magnetic field strength measurement

Model 2650 is capable of precisely measuring the magnetic field
distribution on an LSI or a printed circuit board using magnetic
field probe PR 26M (optional)

As the magnetic field detection portion of PR 26M is of a shield­ed loop structure that adopts glass ceramic multi-layer board
technology of excellent high frequency characteristics, it is pos­sible to take measurement at high reproducibility by detecting
magnetic field components only. The measuring frequency
range is as broad as 10MHz to 3GHz, and the measured value
is calibrated in the instrument.

Evaluation of effectiveness of the bypass capacitor located at
the power supply terminal of an LSI and evaluation of wiring rule
on a printed circuit board can be raised as typical use of PR
26M. PR 26M is not affected by adjacent patterns because of
high space resolution.

Occupied bandwidth measurement

It is possible to measure the
occupied frequency bandwidth
as the bandwidth of the point
that is lower by X (dB) than the
peak level or as the bandwidth
of the point of Y (%) of the total
power.

Electric field strength measurement

It is possible to measure the electric field strength by connecting
dipole antennas (optional) to the input connector. A dipole anten­na that suits the use is available. AN301 is mainly for PDC
800MHz and GSM 900MHz band, AN302 is mainly for PDC
1500MHz band, AN303 is mainly for PHS, W-CDMAand GSM
1800 / 1900MHz band, and AN304 is mainly for 2.4GHz wire­less LAN and Bluetooth. AN304 is capable of measuring direct
sequence spread spectrum, frequency hopping and Bluetooth
system by 10 ms sweep time and MAX HOLD function.

Measuring functions 2650

The conventional method cover­ing low frequency through high
frequency with a single antenna
results in low antenna gain
because of using a range deviat­ing from the antenna resonance
point, and the dynamic range
largely worsens as a result.
Model 2650, however, provides
an antenna for each frequency
band and uses a resonance point
of high gain only, and accordingly, it is capable of securing a
wide dynamic range. Antennas of other bands will be also pre­pared if requested.
As the electric field strength is calibrated for each antenna in
Model 2650, it is possible to directly read the measured value.

Marker and peak search 2650

Marker measurement

Two different modes are available for marker measurement.
One is normal marker mode to measure and display the fre­quency (maximum effective number of digits : 7) and level (max­imum effective number of digits : 3) of the marker point, and
another is delta marker mode to measure and display the fre­quency difference and level difference between two markers
(one of which is a reference marker).

Normal peak search

Zone peak search

Peak search

Two different modes are available for peak search. One is nor­mal peak search mode to search for the peak level with all of
10div of the frequency axis as the search range, and another
is in-zone peak search mode to search for the peak level in the
range specified by the center value and width. NEXT search
(search for the next smaller level) of up to 9 is permitted in the
normal peak search mode. The marker moves to the peak
level at each sweep in the in-zone peak search mode.

Normal marker measurement

Delta marker measurement

Auto tuning 2650

Auto range 2650

Save / Load 2650

The search for the signal of the maximum level in the 3.3GHz
band is executed and the result is displayed in the specified fre­quency span when the AUTO TUNE key is pressed. The spec­trum is tuned to the vicinity of the center of the screen, and the
reference level, resolution bandwidth, video bandwidth and
sweep time are automatically set at optimum values.
This function is very convenient when used for measurement of
an unknown signal.

Resolution bandwidth, video bandwidth and sweep time are set automatically based on the specified
frequency span. Furthermore, it is also possible to automatically set one or two of either resolution
bandwidth, video bandwidth and sweep time.
The operator is released from troublesome operation because these three parameters that accompany
the frequency span are set automatically.

It is possible to save 100 traces and 100 setups. Using the
optional AK 2650 software and interface cable. This function
may be used when various data are acquired and they are eval­uated later, or when it is wanted to make a comparison with for­merly acquired data. The saved traces and setups can be trans­ferred to a PC through RS-232C.

Detects the
maximum level
in the full span

Displays the result
in the specified
frequency span

Hard copies of the image on the screen can be produced if a
printer (model PT 21650, optional) is connected, using the RS­232C port.
Printing begins when the PRINT key is pressed. The printer is of
dual power supply scheme, i.e., AC adaptor and battery, and it
is possible to easily produce hard copies of measured data even
outdoors where no AC power supply is available. The operating
time of the battery-powered printer is about 30 minutes (when
used continuously), and it is possible to produce about 80 hard
copies of images on the screen.

Hard copy of display 2650

High resolution display on the PC screen 2650

Although the spectrum is displayed by 250 points on the hori­zontal axis on the spectrum analyzer screen, it is fetched by
1000 points per sweep in the instrument. When PC Software
(AK 2650, optional) is used, all of these 1000 points are trans­ferred to a PC (the maximum transfer rate is 38,400 bps) and
are displayed on the PC screen. The image, therefore, becomes
clearer. Furthermore, setup of spectrum analyzer can be made
from the PC side

Spectrum Analyzer

Printer

Print

Calculation functions 2650

Max hold

The update spectrum data is compared with that of last time for
each point of the X-axis, and the larger one is retained and dis­played. The number of times of sweep can be set in the range
from 2 to 1024 times by steps, which is a power of 2, or by infi­nite. It is possible to observe burst signal and frequency drift.

Average

Simple averaging processing is executed at each sweep. The
number of times of averaging can be set from a range of 2 to
256 times by steps, which is a power of 2. The signal compo­nents buried in the noise can be measured.

Over write

The image on the screen is not cleared for each sweep, and
overwriting display is executed. It is, therefore, possible to
observe the process of changes in the signal.

Min hold

The update spectrum data is compared with that of last time for
each point of the X-axis, and the smaller one is retained and
displayed. The number of times of sweep can be set in the
range from 2 to 1024 times by steps, which is a power of 2, or

by infinite.

Standard accessories 2650

Optional accessories 2650

Specifications for optional accessories 2650

●

AC Adaptor

●

Dipole antenna

●

Magnetic field pole

●

Soft carrying case

●

Accessory
pouch

●

Fuse

●

Operating
manual

AN 301 AN 302 AN 303 AN 304 AN 305

PR 26M

●

Coaxial adaptor

kit
CT 2701

●

SMA to BNC
Connector

AD 26

(with dedicated double

shielded coaxial cable)

●

SMA coaxial cable

SMA(P)/SMA(P)
DC to10GHz(VSWR<1.5)

CC 301: 1.6 ft
CC 302: 3.2 ft
CC 303: 4.92 ft
CC 304: 6.5 inches
CC 305: 6.5 inches
CC 306: 6.5 inches
CC 307: 6.5 inches

●

Ni-MH battery

●

Roll paper for printer

●

Printer

●

PC software

BP 2650

BC 2650

LC 2650

PX 2650

PT 2650

Ak 2650

( with AC adaptor

4 pcs of batteries
a roll paper)

■ Dipole Antennas (antenna gain and VSWR are specified at a center of frequency range)

Items AN 301 AN 302 AN 303 AN 304 AN 305
Frequency Range 0.8 to 1GHz 1.25 to 1.65GHz 1.7GHz to 2.2GHz 2.25GHz to 2.65GHz 390 to 410MHz
Antenna Gain >1dBi >1dBi >1dBi >1dBi >1dBi
VSWR <1.5 <1.5 <1.5 <1.5 <1.5
Dimensions 7.5∆ x 250mm 7.5∆ x 250mm 7.5∆ x 250mm 7.5∆ x 250mm 7.5∆ x 250mm
Weight (approx.) 20g 20g 20g 20g 20g

■ Printer

Items Specifications
Printing method Thermal serial dot method
Paper 80mm width thermal paper
Power source internal: alkaline battery (4pcs)

External: DC6V/1.5A
Dimensions (WxHxD)134 x 58 x 180mm
Weight approx. 550g (mainframe only)

■ Magnetic Field Probe Model PR 26M

Items Specifications
Frequency Range 10MHz to 3GHz
Space Resolution approx. 0.25mm (depending on objects)
Dimensions Outside: 12∆ x 135mm

Probe tip: 2mm (W) x 1mm (T)

Connector SMA(P)

■ Frequency Section

Frequency range 50kHz to 3.3GHz

Center frequency

Setting resolution 100kHz

(Allows rotary encoder, numeric key and function key)

Accuracy within ±(30+100T)kHz±1dot T : Sweep time (s)

(frequency span: 200kHz to 10MHz, RBW : 30kHz, 23 ±5°C)
within ±(100+700T)kHz±1dot T : Sweep time (s)

(frequency span : 20MHz to 3.3GHz, RBW : 100kHz, 23 ±5°C)
RBW frequency within ±6% of RBW (RBW : 3kHz, 30kHz)
error within ±30% of RBW (RBW : 100kHz to 3MHz)

Frequency span

Setting range 0Hz (zero span), 200kHz to 2GHz (1-2-5step)

and 3.3GHz (full span)
Accuracy within ±3% ±20TkHz ±1dot (Frequency span : 200kHz to

10MHz, 23 ±5°C)

within ±3% ±200TkHz ±1dot (Frequency span : 20MHz to

3.3GHz, 23 ±5°C) T : Sweep time (s)

Display resolution Frequency span/250

Frequency span/1000 (only the measurement by RS-232C

communication)
Display dot 251dots, 1001dots (only the measurement by RS-232C
number communication)

(The unit displays data in 251 horizontal dots, but it internally

captures the trace in 1001 dots)

Resolution bandwidth 3dB bandwidth

Setting range 3kHz to 3MHz (1-3step) and AUTO
Accuracy within ±20%
Selectivity 1 : 12 (typical, 3dB : 60dB)

Video bandwidth 100Hz to 300Hz (1-3step), OFF and AUTO

SSB Phase noise -90dBc / Hz (typical, 100kHz offset, RBW : 3kHz, VBW

100Hz,Sweep time : 0.3s)
Spurious response less than -60dBc
Harmonics less than -40dBc (50kHz to100MHz)

less than -45dBc (100MHz to 3.3GHz)

■ Amplitude Section

Reference level

Setting range +10 to -40dBm (1dB step)
Accuracy within ±0.8dB ±1dot (center frequency : 100MHz, RBW :

3MHz, VBW : OFF, ATT : 0dB, 23 ±5°C)
Unit dBm, dBV, dBmV, dBµV, dBµV/m, dBµA/m

(dBµV/m and dBµA/m is used the measuring function)
Average noise -110dBm (typical, center frequency : 100MHz RBW : 3kHz,
level VBW : 100Hz)

Frequency within ±2.0dB ±1dot (50kHz to100MHz)
Characteristic within ±1.0dB ±1dot (100MHz to 3.3GHz)
Input impedance 50ohm
Input VSWR less than 2.0
Input attenuator

Operating range 0 to 25dB (1dB step), coupled with reference level

Switching error within ±0.6dB
RBW switching error within ±0.6dB
Display resolution 0.4dB (10dB/div), 0.08(2dB/div)
Display dot number 200dot
Display scale

Scale 10dB / div, 2dB / div
Accuracy within ±0.2dB / 2dB ±1dot

within ±0.8dB / 10dB ±1dot

within ±1.6dB / 70dB ±1dot
Input damage level +20dBm (CW average power), 25VDC
Input connector SMA (J)

■ Sweep Section

Sweep time

Range 10ms to 30s (1-3step, frequency span : 0 to 2GHz) and AUTO

30ms to 30s (1-3step, frequency span : full span) and AUTO

Accuracy within ±0.1% ±1dot ( frequency span : 0 to 2GHz)

within ±1.5% ±1dot ( frequency span : full span)
Trigger mode AUTO (frequency span : zero span)
Detection mode Positive peak, Negative peak, Sample

(when sweep time is 10ms or 30ms, only Sample can be set)

■ Functions

Marker NORM : displays frequency (7 digits max) and level (4 digits

max) at marker point.

DELTA: displays difference frequency and level between 2

markers.

Peak search NORM : searches a peak point within 10div. Available NEXT

peak (10max).

ZONE : searches a peak point within a zone designated by

center and width. Marker moves to a peak point each sweep.

Calculation NORM, MAX HOLD, MIN HOLD, AVERAGE, OVER WRITE

* MAX/MIN HOLD : 2 to 1024 times, AVERAGE : 2 to 256

Measuring Channel power, Adjacent channel power, Occupied frequency

bandwidth, Electric field strength (needs optional antenna),

Magnetic field strength (needs optional magnetic field probe)

measurement.

AUTO tuning When pressing AUTO TUNE key, the maximum level spectrum

within 3.3GHz bandwidth is adjusted to center, and reference

level, RBW, VBW and sweep time are adjusted to optimum

values.

Save / Load

Save Saves 100 traces and 100 setups
Load Loads 1 trace and 1 setup

■ General

Communication

Interface RS-232C
Baud rate 2,400 to 38,400bps

Hard copy Allows direct hard copy with an optional printer

Display

Display LCD
Backlight CFL backlight
Resolution 320 (H) _ 240 (V) dots

Power source

Battery Ni-MH Battery (included)
External DC Pin jack, DC5V / 4A (BC 2650 included)

■ Other

Operating 0 to 40°C (Guaranteed at 23 ±10°C, without soft carrying
temperature case)

Operating humidity less than 40°C / 80%RH (Guaranteed at less than 33°C /

70%RH,without soft carrying case)

Storage -20 to 60°C, less than 60°C / 70%RH
temperature
Dimensions (WxHxD) 6.4 x 2.75 x 10.25 (162 _ 70 _ 260 mm)

Weight (approx.) 3.75 lb. (1.7kg) included battery

3.3 lb.(1.5kg) without battery

Specifications 2650

Specifications subject to change without notice

B&K Precision Corporation

22820 Savi Ranch Parkway, Yorba Linda, CA 92887
Tel: [phone], Fax: [phone]
www.bkprecision.com