Data Sheet
Spectrum Analyzers
2680 Series
Technical data subject to change
© B&K Precision Corp. 2019 www.bkprecision.com
The 2680 Series of spectrum analyzers delivers
performance and functionality in a lightweight,
compact design, suitable for lab and field use.
The large 10.1” wide-screen color display allows
the user to visualize the waveform and make
precision measurements such as third order
intercept, occupied bandwidth, 2D and 3D
spectrum monitor.
The 2680 Series provides a standard
pre-amplifier and tracking generator in both the
2.1 and 3.1 GHz models. The series also includes
1 Hz minimum RBW and advanced measurements,
which make these analyzers perfect for
applications in 2 way radio, site surveying, EMI
pre-compliance, characterizing the frequency
response of RF devices and more.
Features & benefits
n Frequency range: 9 kHz to 2.1 or 3.2 GHz
n High Sensitivity -161 dBm/Hz displayed average
noise level (DANL)
n Low phase noise of -98 dBc/Hz @ 10 kHz
offset
n Low level uncertainty of ±0.7 dB
n 1 Hz minimum resolution bandwidth (RBW)
n Preamplifier and tracking generator standard
on all models
n 10.1” wide-screen 1024 x 600 color display
n LAN and USBTMC connectivity
n USB host port to store and recall waveform
data, setups, and screen captures
Options
n Reflection measurement
n EMI pre-compliance
Models 2682 2683
Frequency Range 9 kHz to 2.1 GHz 9 kHz to 3.2 GHz
Tracking Generator √ √
Preamplifier √ √
Advanced Measurements √ √
USB (USBTMC) LAN
1 Hz minimum resolution bandwidth
(RBW)
Low resolution bandwidth helps differentiate between
adjacent signals
RBW
1 Hz
Advanced measurements
n Channel Power
n Adjacent Channel Power
n Occupied Bandwidth
n Total Power
n Third-Order-Intercept
n 2D and 3D Spectrum Monitor
Standard
Spectrum Analyzers
2680 Series
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Front panel
Side & rear panel
LCD display
10.1 inch TFT high resolution color
display to view critical detail in the
spectrum
Function keys
Setup measurement modes
and activate context based
help for each key which also
includes SCPI information
where applicable
RF input
Tracking generator output
For gain/loss, antenna, and cable
measurements. Standard on all
models
Earphone jack
Listen to demodulated
AM or FM signals
Trigger input
External TTL signal to
initiate sweep
Control keys
Use the rotary knob, arrow
keys or alpha numeric keys
to adjust values
USB host port
Store or recall
analyzer settings
and save screen
captures
Kensington security slot
Secure your spectrum analyzer
and prevent theft
Power
switch
Remote interface
USB and LAN
connections
Menu control keys
Provide quick access to the
most common functions in the
current mode
10 MHz REF input/
output
Synchronize multiple
instruments
Spectrum Analyzers
2680 Series
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Operation highlights
Low displayed average noise level (DANL)
Phase noise -98 dBc/Hz@ 1 GHz, offset 10 kHz.
Four independent traces and markers
Capture snapshots, continuously update the maximum or minimum value, and perform math
on all 4 individually colored traces.
Delta markers
Powerful delta markers can be used to select amplitude, span, stop, start or center frequency,
measure noise level, amplitude or frequency.
Take advantage of the preamp and -161 dBm DANL to measure low level signals accurately.
Low phase noise for accurate measurements
The 2D and 3D spectrum monitor features are standard on the 2.1 GHz and 3.2
GHz models. The 3D spectrum monitor can be displayed using the provided
PC software, while the 2D is viewable on the spectrum analyzer screen and
in the PC software. This feature shows how the frequency content of a signal
changes over time by representing the power intensity with a color gradient.
In today’s crowded spectrum, ACPR measurements are critical to ensure
compliance with regulations. The 2680 series displays the main channel
power, left and right channel power as well as bandwidth for each channel
on screen for ease of determining the total power being transmitted and the
spectrum being used.
Spectrum monitor Adjacent channel power ratio (ACPR)
Spectrum Analyzers
2680 Series
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Options
PC software
Use 3D spectrum monitoring with the PC software.Generate test reports
Expand control of the spectrum analyzer with
front panel emulation. Create, load or save user
defined limit and correction files, save screen
captures and store readings from the included
software.
Reflection bridge
Quasi-peak detection with dwell time helps identify
non-compliant emissions.
Use the provided EMI software (available for download
at www.bkprecision.com) to configure the spectrum
analyzer, perform prescan, peak search, final scan and
generate reports of your pre-compliance tests.
Visualize return loss, reflection coefficient, and VSWR
of your DUT.
This option enables VSWR, reflection
coefficient, and return loss measurements for
tuning and determining the efficiency of
antennas, filters, or RF transmission modules.
Reflection measurement option
This option enables the instrument’s EMI
measurement function which includes
pre-defined bandwidth set points of 200 Hz,
9 kHz and 120 kHz, a -6dB EMI filter, and the
quasi-peak detector as specified by CISPR 16-1.
EMI pre-compliance option
The RF energy radiating from a device can be
detected and measured with near field probes and
the spectrum analyzer. The wide band amplifier
can be connected between the probe and the
2680 Series to increase the dynamic range of the
measurement system. The probes can also be
used to test RF immunity by inducing signal into
the circuit.
Near field probe kit
Use near field probes to help track down emissions.
Magnetic (H) and electric (E) near field probes with
40 dB pre-amplifier
Order information for instrument options
Order number Description
EMI2680 License key, activates EMI measurements with Quasi-peak
RFL2680 License key, activates reflection measurements
RB2680 Reflection bridge with adapters
PR262 1 electric and 3 magnetic field probes with amplifier and SMA cable
Buy now, upgrade later
Install the licenses at any time or try before you buy with the 30 day trial license on each
instrument. Installation is quick and easily done within the spectrum analyzer menu. To
purchase a license key, please fill out the license request form which can be found on the
2680 Series accessory page on our website www.bkprecision.com.
Spectrum Analyzers
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Specifications
Series 2682 2683
Frequency characteristics
Frequency Range 9 kHz to 2.1 GHz 9 kHz to 3.2 GHz
Frequency Resolution 1 Hz
Frequency Span 0 Hz, 100 Hz to 2.1 or 3.2 GHz
Frequency Span Accuracy ±Span / (number of sweep points -1)
Internal reference source
Reference Frequency 10 MHz
Initial Calibration Accuracy <1 ppm
Temperature Stability <1 ppm/year, 0 °C to +50 °C
Frequency Aging Rate <0.5 ppm/first year, 3.0 ppm/20 year
Frequency Reference
Accuracy
±[(time since last adjustment × frequency aging
rate) + temperature stability + calibration accuracy]
Marker
Marker Resolution Span / (number of sweep points -1)
Marker Uncertainty
± [frequency indication x frequency reference
uncertainty + 1% x span + 10% x resolution
bandwidth + marker resolution]
Frequency Counter Resolution 1 Hz
Frequency Counter
Uncertainty
± [frequency indication x frequency
reference accuracy + counter resolution]
Bandwidths
Resolution Bandwidth (-3 dB) 1 Hz to 1 MHz, in 1-3-10 sequence
Resolution Filter Shape Factor <4.8:1 (60 dB: 3 dB), Gaussian-like
RBW Uncertainty <5%
Video Bandwidth (-3 dB) 1 Hz to 3 MHz, in 1-3-10 sequence
VBW Uncertainty <5%
Amplitude and level
Measurement Range
(preamplifier off)
DANL to +10 dBm, 100 kHz to 1 MHz
DANL to +20 dBm,1 MHz to 3.2 GHz
Reference Level -100 dBm to +30 dBm, 1 dB steps
Preamplifier 20 dB (nom.), 9 kHz to 3.2 GHz
Input Attenuation 0 to 51 dB, 1 dB steps
Maximum Input DC Voltage ±50 Vdc
Maximum Average RF Power 30 dBm, 3 minutes, fc >equal to 10 MHz,
attenuation >20 dBm, preamplifier off
Maximum Damage Level 33 dBm, fc >equal 10 MHz, attenuation >20 dBm,
preamplifier off
Specifications are valid under the following conditions: The instrument is within the calibration period, has been stored between 0 and 50°C for at least 2 hours prior to use, and has been powered
on and warmed up for at least 40 minutes. The specifications include the measurement uncertainty, unless otherwise noted.
Specifications: All products are guaranteed to meet published specifications when operating temperatures from 5 to 45°C, unless otherwise noted.
Typical: Performance deemed typical implies that 80 percent of the measurement results will meet the typical published performance with a 95th percentile confidence level at room temperature
(approximately 25°C). Typical performance is not warranted and does not include measurement uncertainty.
Nominal: The expected performance or design attribute.
Displayed average noise level (DANL)
20 °C to 30 °C ,attenuation = 0 dB, sample detector,
trace average >50
RBW=10 Hz Normalization to 1 Hz
Preamp Off
9 kHz to 100 kHz -100 dBm (nom.) -100 dBm (nom.)
100 kHz to 1 MHz -97 dBm,
-101 dBm (typ.)
-107 dBm,
-111 dBm (typ.)
1 MHz to 10 MHz -122 dBm,
-126 dBm (typ.)
-132 dBm,
-136 dBm (typ.)
10 MHz to 200 MHz -127 dBm,
-131 dBm (typ.)
-137 dBm,
-141 dBm (typ.)
200 MHz to 2.1 GHz -125 dBm,
-129 dBm (typ.)
-135 dBm,
-139 dBm (typ.)
2.1 GHz to 3.2 GHz -116 dBm,
-122 dBm (typ.)
-126 dBm,
-132 dBm (typ.)
Preamp On
9 kHz to 100 kHz -107 dBm (nom.) -117 dBm (nom.)
100 kHz to 1 MHz -122 dBm,
-127 dBm (typ.)
-132 dBm,
-137 dBm (typ.)
1 MHz to 10 MHz -138 dBm,
-144 dBm (typ.
-148 dBm,
-154 dBm (typ.)
10 MHz to 200 MHz -146 dBm,
-151 dBm (typ.)
-156 dBm,
-161 dBm (typ.)
200 MHz to 2.1 GHz -145 dBm,
-148 dBm (typ.)
-155 dBm,
-158 dBm (typ.)
2.1 GHz to 3.2 GHz -135 dBm,
-139 dBm (typ.)
-145 dBm,
-149 dBm (typ.)
Phase noise
Carrier Offset fc=1 GHz, 20 ºC ~30 ºC
10 kHz <-95 dBc/Hz, <-98 dBc/Hz (typ.)
100 kHz <-96 dBc/Hz, <-97 dBc/Hz (typ.)
1 MHz <-115 dBc/Hz , <-117 dBc/Hz (typ.)
Level display
Logarithmic Level Axis 10 dB to 100 dB
Linear Level Axis 0 to reference level
Units of Level Axis dBm, dBmV, dBµV, dBµA , V, W
Number of Display Points 751
Number of Traces 4
Trace Detectors
Positive-Peak, Negative-Peak, Sample, Normal,
Average (Voltage/RMS/Video),
Quasi-Peak (with EMI option)
Trace Functions Clear Write, Max Hold, Min Hold, View,
Blank, Average
Spectrum Analyzers
2680 Series
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v021919
Frequency response
Preamplifier
Off ±0.8 dB,
±0.4 dB typ.
On ±0.9 dB,
±0.5 dB typ.
Error and accuracy
Resolution Bandwidth
Switching Uncertainty
1 Hz RBW
Logarithmic resolution ±0.2 dB,
Linear resolution ±0.01, nom.
Input Attenuation
Switching Uncertainty
20 °C to 30 °C, fc = 50 MHz, preamp off,
Relative to 20 dB, 1 to 51 dB attenuation ±0.5 dB
Absolute Amplitude Accuracy Preamplifier off: ±0.4 dB, input signal -20 dBm
Preamplifier off: ±0.5 dB, input signal -40 dBm
Total Amplitude Accuracy
±0.7 dB
20 °C to 30 °C , Fc>100 kHz, input signal -50 dBm
to 0 dBm, RBW = 1 kHz, VBW = 1 kHz, peak
detector, attenuation = 20 dB,preamp off,
95th percentile reliability
RF Input VSWR <1.5 nom.
Input attenuation 10 dB, 1 MHz to 3.2 GHz
Distortion and spurious responses
Second Harmonic Distortion
-65 dBc
fc ≥50 MHz, Mixer Level -30 dBm,
attenuation = 0 dB, preamp off, 20 °C to 30 °C
Third-Order Intercept
+10 dBm
fc ≥50 MHz, two -20 dBm tones at input mixer
spaced by 100 kHz, attenuation = 0 dB, preamp off,
20 °C to 30 °C
1 dB Gain Compression
>-5 dBm, nom.
fc ≥50 MHz, attenuation = 0 dB, preamp off,
20 °C to 30 °C
Residual Response
<-90 dBm, typ.
input terminated = 50 Ω,attenuation = 0 dB,
20 °C to 30 °C
Input Related Spurious <-65 dBc
Mixer level = -30 dBm, 20 °C to 30 °C
Sweep and trigger
Sweep Time 1 ms to 3000 s
Sweep Accuracy Accuracy, Speed
Sweep Mode Sweep, FFT
Sweep Rule Single, Continuous
Trigger Source Free, Video, External
External Trigger 5 V TTL level, 1 kΩ, BNC-female,
rising edge/falling edge
Specifications (continued)
Tracking generator
Frequency Range 100 kHz to 2.1 GHz 100 kHz to 3.2 GHz
Output Level -20 dBm to 0 dBm
Output Level Resolution 1 dB
Output Flatness ±3 dB
Output Maximum
Reserve Level Mean power: 30 dBm, DC: ±50 Vdc
EMI Pre-compliance option (EMI2680)
Resolution Bandwidth (6 dB) 200 Hz, 9 kHz, 120 kHz
Detector Quasi-peak (following CISPR 16-1-1)
Dwell Time 0 µs to 10 s
Reflection measurement option (RFL2680)
Measurements VSWR, Return loss, Reflect coefficient
RF and 10 MHz input/output
Front panel RF input 50 Ω, N-female
Front panel TG output 50 Ω, N-female
10 MHz reference output 10 MHz, >0 dBm, 50 Ω, BNC-female
10 MHz reference input 10 MHz, -5 dBm to +10 dBm, 50 Ω, BNC-female
General
AC Input 100 V - 240 V, 50 Hz/60 Hz/400 Hz AC
Display TFT LCD, 1024 × 600 (waveform area 751 × 501),
10.1”
I/O Interface
USB host (type A) USB 2.0
USB device (type B) USB 2.0
LAN 10/100 Base T, RJ45
Temperature Operating: 0 °C to 50 °C
Storage: -20 °C to 70 °C
Humidity 0 °C to 30 °C , ≤95% RH
30 °C to 50 °C , ≤75% RH
Safety EN 61010-1:2010, Low Voltage Directive (LVD)
2014/35/EU
Electromagnetic Compatibility EN 61326-1:2013, EMC Directive 2014/30/EU
Dimensions (W x H x D) 15.47” x 8.15” x 4.59”
(393 mm x 207 mm x 116.5 mm)
Weight 10.1 lb (4.60 kg)
Warranty 3 years
Included Accessories Power cord, certificate of calibration
Optional Accessories EMC Near-field probes (PR262),
reflection bridge (RB2680)
