![](/html/e1/e144/e144492f0eae4437458d5ad05c8e68fbe55cf508c30fd72b07c651495af5cd92/bg1.png)
Data sheet
2.0 GHz Handheld RF Field Strength Meter
Model 2640
Cost effective RF field strength meter
with basic spectrum analyzer function
The B&K Precision model 2640 is a battery operated, hand-held RF
Field Strength Meter capable of measuring RF levels and electric field
strength. The synthesizer-based design provides you with reliable
measurements across a wide reception range of 100KHz to
2000MHz, a remarkably low noise floor of -110 dBm to detect weak
signals and basic spectrum analyzer functionality. The 2640 provides
field technicians and engineers with a cost-effective measurement tool
for basic signal investigations at only a fraction of the cost of a
full-featured conventional spectrum analyzer.
The 2640’s user-friendly interface combined with convenient presets
such as predefined filter settings and other special functions (e.g.
squelch) commonly used in analog communication systems make the
2640 easy to use. The B&K Precision 2640 supports RS 232C serial
communication and includes software that can control the instrument
from a personal computer. The user can save the instrument’s
measurement data on the PC for further analysis.
The handheld RF Field Strength Analyzer is an ideal tool for field
testing, installing and maintaining Mobile Telecommunications systems
such as Cellular and Cordless Phone, CB Paging, Paging, Cable and
Satellite TV Systems as well as performing antenna site measurements
and maintenance.
Features
■ Battery-operated portability
■ 100KHz to 2GHz measurement range with a maximum
display span of 400MHz
■ Hand-held and battery operated portability
■ Built-in 2GHz frequency counter
■ Detects wide band (180KHz) and narrow band FM (12.5KHz),
AM & SSB (2.4KHz) signals
■ Phase-locked loop for precise frequency tuning
■ Up to 160 channels may be scanned and displayed
■ Audio output of the detected signal with built-in speaker
■ Detachable antenna included
■ Back-lit display
■ Storable setups and displays
■ RS-232 Interface
Technical data subject to change
© B&K Precision Corp. 2008
v031610
wwwwww..bbkk pprreecc iissiioonn..ccoomm
Tel.: 714.921.9095
![](/html/e1/e144/e144492f0eae4437458d5ad05c8e68fbe55cf508c30fd72b07c651495af5cd92/bg2.png)
Handheld RF Field Strength Meter
odel 2640
M
Specifications
2640
▲
RRFF FFiieelldd SSttrr ee nnggtt hh AA nnaa llyy zz eerr
■ Spectrum: Peak Search, Marker to Center, Channel Power
Function
■ Internal Attenuation: The input range can be extended by
enabling the internal 10 dB Attenuation function
■ Sweep Mode: Single Run, Free Run, Squelch Run Selectable
■ Squelch Function: The Squelch Level may be adjusted across the
full dynamic range.
Volume
RF Input
Type N
▲
FF rreeqq uueenn cc yy CC oouunntteerr
The 2640’s built in frequency counter is independent from the field strength
analyzer and measures the signal applied to the external BNC connector
■ Frequency range: 35 MHz to 2,000 MHz
■ No. of digits: 7 digits
■ Resolution: 1 kHz
▲
PP CC SSooff ttww aarree
The included AK2640 software and interface cable allows full control of the 2640
via a PC through the RS232C interface. The software allows the saving, recalling
and analyzing of current and saved waveforms. The 2640 can save up to 100
waveforms and states in to it’s internal memory.
Screenshot of the AK2640 software
Frequency
Counter
Earphone
FF rreeqquueenncc yy
Frequency Range 100 kHz to 2,000 MHz
Resolution Min. 6.25 kHz Multiples
Accuracy ± 4.5 PPM
W-FM / N-FM Wide FM : Approx. 180 kHz @-6 dB
/ AM / SSB Narrow FM : Approx. 12.5KHz @-6 dB
AM/SSB : Approx. 2.4 kHz @-6 dB
Step Range AM, SSB, Narrow FM : 6.25 kHz, 12.5 kHz
Wide FM : 6.25~125 kHz (Multiple of 6.25 kHz)
125~2500 kHz (Multiple of 125 kHz)
Span Range AM, SSB, Narrow FM : 1 MHz, 2 MHz
Wide FM : 1~20 MHz (Multiple of 1 MHz)
20~400 MHz (Multiple of 20 MHz)
Frequency Selection Mode Center, Start/ Stop, Span
AAmmpplliittuuddee
Measurement Range -45 dBm to –110 dBm
Average noise Level Wide FM : -100 dBm Max.
Narrow FM : -110 dBm Max.
AM/SSB : -100 dBm Max.
Amplitude Units dBm, dBmV, dBuV
Reference Level Accuracy ±3.0 dB (Typical) @ 400 kHz to 600 kHz
±2.0 dB @ over 600 kHz
Reference Level Range 0 dBm to –80 dBm
Log Scale 0.2 dB/DIV min, in 0.25 dB Span (5 Display Division)
Internal Attn 10 dB
Internal Attn Accuracy ±1.0 dB (@25)
SSwwee eepp
Speed Min. 500 msec
Trigger Source Narrow FM / Wide FM / AM / SSB
Trigger Mode Free Run /Single Run /Continuous /Wave Squelch Run
Trigger Level TTL Level
Marker Mode Marker / Delta Marker
MM ee mm oorryy
Trace & Setup Storage Max 100 Waveforms and 100 States
DD iissppllaayy
Type Mono STN LCD
Display Resolution 192 Pixels X 192 Pixels
LCD Light On / Off
FF rreeqquueenncc yy CCoo uu nn tteerr
Frequency Range 35 MHz to 2,000 MHz
Resolution 7 Digits
Accuracy ±50 PPM ±1 COUNT
Sampling Time 1 sec
Input Sensitivity 35 MHz to 2,000 MHz : 150 mVrms
20 MHz to 1,000 MHz : 100 mVrms
Input Impedance 50 Ω
Max. Input Voltage 5 Vrms Max.
SSppeecc ttrr uu mm II nn ppuutt PPoorrtt
RF Input Connector N type Female, 50Ω
Max Input Level Max. +10 dBm, 5V rms
OOppeerr aatt ii oonn EEnn vviirroonnmmeenntt
Operating Temperature 0º C to 40º C
Humidity 35% RH to 85% RHP
Storage Temperature 10º C to 50º C
PPoowweerr SSoouu rrccee
Battery Power Source AA Type Ni-MH Rechargeable Battery × 6 PCS
Battery Specification AA Type 1.2 V, 2,700 mAh Rechargeable Nickel
Metal Hydride Battery
Adapter SMPS Type AC Adapter (DC 12 V Output)
Car-Adapter (DC 12 V Output)
Auto Power On/Off Off/ 5 min./ 10 min./ 20 min./30 min.
PPhhyyss ii ccaall SSppeecc iiffiicc aatt ii oo nn ss
Dimension 4 ”(W)×9 ”(H)×1.8 ”(D)
Weight Approx. 0.66 kg(1.45 lbs)
(including Antenna, except Battery)
One Year Warranty
Accessories
Screenshot of the exported CSV data
22 wwww ww ..bbkk pprr ee cc iissiioonn ..cc oomm
Supplied: Antenna (Receive Only), SMPS Type AC Adapter, Fuji-AA type NI-MH Rechargeable
Battery (6 PCS, 1.2 V 2,700 mAh), Manual, Coaxial Cable, Earphone, Carrying Case, Carrying
Belt, RS-232C Cable, Adapter(N-BNC), Software for PC Application
model