B&K Precision 2682 User's Manual
Safety Summary
The following safety precautions apply to both operating and maintenance personnel and must be followed during all
phases of operation, service, and repair of this instrument.
Before applying power to this instrument:
• Read and understand the safety and operational information in this manual.
• Apply all the listed safety precautions.
• Verify that the voltage selector at the line power cord input is set to the correct line voltage. Operating the instrument
at an incorrect line voltage will void the warranty.
• Make all connections to the instrument before applying power.
• Do not operate the instrument in ways not specied by this manual or by B&K Precision.
Failure to comply with these precautions or with warnings elsewhere in this manual violates the safety standards of design,
manufacture, and intended use of the instrument. B&K Precision assumes no liability for a customer’s failure to comply
with these requirements.
Category rating
The IEC 61010 standard denes safety category ratings that specify the amount of electrical energy available and the
voltage impulses that may occur on electrical conductors associated with these category ratings. The category rating is
a Roman numeral of I, II, III, or IV. This rating is also accompanied by a maximum voltage of the circuit to be tested,
which denes the voltage impulses expected and required insulation clearances. These categories are:
Category I (CAT I): Measurement instruments whose measurement inputs are not intended to be connected to the mains sup
ply. The voltages in the environment are typically derived from a limited-energy transformer or a battery.
Category II (CAT II): Measurement instruments whose measurement inputs are meant to be connected to the mains supply at
a standard wall outlet or similar sources. Example measurement environments are portable tools and house
hold appliances.
Category III (CAT III): Measurement instruments whose measurement inputs are meant to be connected to the mains installa
tion of a building. Examples are measurements inside a building’s circuit breaker panel or the wiring of permanentlyinstalled motors.
Category IV (CAT IV): Measurement instruments whose measurement inputs are meant to be connected to the primary power en
tering a building or other outdoor wiring.
Do not use this instrument in an electrical environment with a higher category rating than what is specied in this manual
for this instrument.
You must ensure that each accessory you use with this instrument has a category rating equal to or higher than the
instrument’s category rating to maintain the instrument’s category rating. Failure to do so will lower the category rating
of the measuring system.
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Electrical Power
This instrument is intended to be powered from a CATEGORY II mains power environment. The mains power should be
115 V RMS or 230 V RMS. Use only the power cord supplied with the instrument and ensure it is appropriate for your
country of use.
Ground the Instrument
To minimize shock hazard, the instrument chassis and cabinet must be connected to an electrical safety ground. This
instrument is grounded through the ground conductor of the supplied, three-conductor AC line power cable. The power
cable must be plugged into an approved three-conductor electrical outlet. The power jack and mating plug of the power
cable meet IEC safety standards.
Do not alter or defeat the ground connection. Without the safety ground connection, all accessible conductive parts
(including control knobs) may provide an electric shock. Failure to use a properly-grounded approved outlet and the
recommended three-conductor AC line power cable may result in injury or death.
Unless otherwise stated, a ground connection on the instrument’s front or rear panel is for a reference of potential only
and is not to be used as a safety ground. Do not operate in an explosive or ammable atmosphere.
Do not operate the instrument in the presence of ammable gases or vapors, fumes, or nely-divided particulates.
The instrument is designed to be used in oce-type indoor environments. Do not operate the instrument
• In the presence of noxious, corrosive, or ammable fumes, gases, vapors, chemicals, or nely-divided particulates.
• In relative humidity conditions outside the instrument’s specications.
• In environments where there is a danger of any liquid being spilled on the instrument or where any liquid can condense
on the instrument.
• In air temperatures exceeding the specied operating temperatures.
• In atmospheric pressures outside the specied altitude limits or where the surrounding gas is not air.
• In environments with restricted cooling air ow, even if the air temperatures are within specications.
• In direct sunlight.
This instrument is intended to be used in an indoor pollution degree 2 environment. The operating temperature range is
0∘C to 40∘C and 20% to 80% relative humidity, with no condensation allowed. Measurements made by this instrument
may be outside specications if the instrument is used in non-oce-type environments. Such environments may include
rapid temperature or humidity changes, sunlight, vibration and/or mechanical shocks, acoustic noise, electrical noise,
strong electric elds, or strong magnetic elds.
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Do not operate instrument if damaged
If the instrument is damaged, appears to be damaged, or if any liquid, chemical, or other material gets on or inside the
instrument, remove the instrument’s power cord, remove the instrument from service, label it as not to be operated,
and return the instrument to B&K Precision for repair. Notify B&K Precision of the nature of any contamination of the
instrument.
Clean the instrument only as instructed
Do not clean the instrument, its switches, or its terminals with contact cleaners, abrasives, lubricants, solvents, acids/bases,
or other such chemicals. Clean the instrument only with a clean dry lint-free cloth or as instructed in this manual. Not
for critical applications
This instrument is not authorized for use in contact with the human body or for use as a component in a life-support
device or system.
Do not touch live circuits
Instrument covers must not be removed by operating personnel. Component replacement and internal adjustments must
be made by qualied service-trained maintenance personnel who are aware of the hazards involved when the instrument’s
covers and shields are removed. Under certain conditions, even with the power cord removed, dangerous voltages may
exist when the covers are removed. To avoid injuries, always disconnect the power cord from the instrument, disconnect
all other connections (for example, test leads, computer interface cables, etc.), discharge all circuits, and verify there
are no hazardous voltages present on any conductors by measurements with a properly-operating voltage-sensing device
before touching any internal parts. Verify the voltage-sensing device is working properly before and after making the
measurements by testing with known-operating voltage sources and test for both DC and AC voltages. Do not attempt
any service or adjustment unless another person capable of rendering rst aid and resuscitation is present.
Do not insert any object into an instrument’s ventilation openings or other openings.
Hazardous voltages may be present in unexpected locations in circuitry being tested when a fault condition in the circuit
exists.
Fuse replacement must be done by qualied service-trained maintenance personnel who are aware of the instrument’s fuse
requirements and safe replacement procedures. Disconnect the instrument from the power line before replacing fuses.
Replace fuses only with new fuses of the fuse types, voltage ratings, and current ratings specied in this manual or on
the back of the instrument. Failure to do so may damage the instrument, lead to a safety hazard, or cause a re. Failure
to use the specied fuses will void the warranty.
Servicing
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Do not substitute parts that are not approved by B&K Precision or modify this instrument. Return the instrument to
B&K Precision for service and repair to ensure that safety and performance features are maintained.
For continued safe use of the instrument
• Do not place heavy objects on the instrument.
• Do not obstruct cooling air ow to the instrument.
• Do not place a hot soldering iron on the instrument.
• Do not pull the instrument with the power cord, connected probe, or connected test lead.
• Do not move the instrument when a probe is connected to a circuit being tested.
Safety Symbols
Symbol Name Description
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious
injury.
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious
injury
CAUTION indicates a hazardous situation which, if not avoided, will result in minor or moderate
injury
Caution Refer to the text near the symbol.
Electric Shock hazard
Alternating current (AC)
Chassis ground
Earth ground
On (Power) This is the In position of the power switch when instrument is ON.
Off (Power) This is the Out position of the power switch when instrument is OFF.
NOTICE is used to address practices not related to physical injury.
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Contents
1 Product Overview 8
1.1 Package Contents 8
1.2 Dimensions 8
1.3 Input Power Requirements 8
1.4 Fuse 9
1.4.1 Fuse Replacement 9
1.5 Power-up 10
1.6 Front Panel 10
1.7 Rear Panel 11
1.8 Built-in Help 11
2 Front Panel 13
3 Display 15
4 General Spectrum Analysis 16
4.1 Frequency 16
4.1.1 Center Frequency 16
4.1.2 Start/Stop Frequency 17
4.1.3 Freq Step 17
4.1.4 Peak to CF 17
4.1.5 CF to Step 17
4.2 Span 17
4.2.1 Span 17
4.3 Amplitude 18
4.3.1 Ref Level 18
4.3.2 Attenuator 18
4.3.3 RF Preamp 19
4.3.4 Units 19
4.3.5 Scale 19
4.3.6 Scale Type 19
4.3.7 Ref Offset 19
4.3.8 Corrections 19
4.4 Auto Tune 20
5 Settings 22
5.1 Bandwidth Menu 22
5.1.1 Resolution Bandwidth 22
5.1.2 Video Bandwidth 22
5.1.3 Video to Resolution Bandwidth Ratio 22
5.1.4 Average Type 22
5.2 Trace 23
5.2.1 Trace Averaging 24
5.2.2 Math 24
5.3 Detect 25
5.4 Sweep 25
5.4.1 Sweep Time 26
5.4.2 Sweep Rule 26
5.4.3 Single/Continuous sweeping 26
5.4.4 26
5.5 Trigger 26
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5.5.1 Free Run 26
5.5.2 Video 26
5.5.3 External 27
5.6 Limit 27
5.6.1 Limit Switch 27
5.6.2 Edit 27
5.6.3 Test 27
5.6.4 Setup 27
5.7 TG 28
5.7.1 TG 28
5.7.2 TG Level 28
5.7.3 TG Level Offset 28
5.7.4 Normalize 28
5.8 Demod 29
5.8.1 Demod (AM/FM) 29
5.8.2 Earphone 29
5.8.3 Volume 29
5.8.4 Demod Time 29
6 Measurement Setup 30
6.1 Channel Power 30
6.2 ACPR 30
6.3 Occupied BW 30
6.4 T-Power 30
6.5 Meas Off 30
6.6 ACPR 31
6.6.1 OBW 31
7 Markers 33
7.1 Spec Analyzer Mode 33
7.1.1 Normal Marker 34
7.1.2 Delta Markers 34
7.1.3 Delta Pair Markers 34
7.1.4 Off 34
7.2 Reection Measurement 35
7.3 Marker Table 35
7.4 Marker To 35
7.5 Marker Functions 36
7.5.1 Noise Marker 36
7.5.2 N dB BW 37
7.5.3 Frequency Counter 37
7.5.4 Read Out 37
7.6 peak 37
7.6.1 Search Cong 38
8 System Settings 40
8.1 Language 40
8.2 Power On/Preset 40
8.3 Interface Cong 40
8.4 System Info 40
8.5 Data and Time 41
8.6 Self Test 41
8.1 display 41
8.2 le 41
8.2.1 Browser 41
8.2.2 Open/Load 41
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8.2.3 Type 42
8.2.4 Save 42
8.2.5 Create Folder 42
8.2.6 Delete 42
8.2.7 Operate 42
8.3 preset 42
8.4 couple 42
8.5 help 43
8.6 save-1 43
9 LIMITED THREE-YEAR WARRANTY 46
10 Service Information 47
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Product Overview
The series spectrum analyzer has a frequency range from 9 kHz up to 2.1 GHz (Model 2682) /3.2 GHz (Model 2683),
numerous measurement functions are included.
• All-Digital IF Technology
• Frequency Range from 9 kHz up to 3.2 GHz
• 10 Hz Minimum Resolution Bandwidth(RBW)
• Preamplier
• Up to 3.2 GHz Tracking Generator
• Reection Measurement Kit (Opt.)
• Advanced Measurements
• 10.1 inch display
1.1 Package Contents
• 1 x Model 2680 Spectrum Analyzer
• Power cord
1.2 Dimensions
Figure 1.1 Front View
1.3 Input Power Requirements
The instrument has a selectable AC input that accepts line voltage and frequency input within:
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Figure 1.2 Top View
Figure 1.3 Side View
1.4 Fuse
An AC input fuse is necessary when powering the instrument. The fuse is located at the back of the instrument. If the
fuse needs to be replaced, ensure the AC input power cord is disconnected from the instrument prior to replacement.
Refer to Table 1.2 for fuse requirements.
Before replacing fuse, disconnect the AC power cord rst to prevent electric
shock. Only use same rating of the fuse. Using a different fuse may damage the
instrument.
1.4.1 Fuse Replacement
• Check and/or Change Fuse
− Locate the fuse box above the AC input in the rear panel.
− Remove the small insert. This piece holds the fuse.
− Check and replace fuse for the desired line voltage.
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Frequency Voltage
47 to 60 Hz 100 to 220 V (±10%)
400 Hz 110 V (±10%)
Table 1.1 Input
Power Requirements
Line Voltage Fuse
110 V T 2 AL, 250 V
220 V T 1 AL, 250 V
Table 1.2 Fuses
1.5 Power-up
1. Verify AC Input Voltage Verify and check to make sure proper AC voltages are available to power the instrument.
The AC voltage range must meet the acceptable specication as explained in Section 1.3.
2. Connect Power and turn on analyzer Connect AC power cord to the AC receptacle in the rear panel. The power
button on the front panel should fade in and out. Press the power button to turn ON the instrument. The button
should illuminate continuously and show the startup splash screen.
1.6 Front Panel
Front Panel Items
1 User Graphical
Interface
3 Function Keys 4 Knob
5 Arrow Keys 6 RF Input
7 Numeric Keyboard 8 TG Output
9 Earphone interface 10 USB Host
11 Power Switch
2 Menu Control Keys
Figure 1.4 Front View
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1.7 Rear Panel
Item Description
1 Handle
2 USB Interface supporting:USB Interface supporting: USBTMC, USBCDC (virtual COM)
3 LAN Interface
4 REF IN 10 MHz
5 REF OUT 10 MHz
6 Trigger in
7 Kensington Lock
8 AC Power Input
Figure 1.5 Rear Panel
1. Handle
2. USB Interface (supports USBTMC, and USBCDC (virtual COM))
3. Ethernet
4. Reference in 10 MHz
5. Reference out 10 MHz
6. Trigger input
7. Security lock
8. AC power connector
1.8 Built-in Help
The built-in help system provides information about every function key at the front panel and every menu soft key.
How to acquire built-in help
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Press the “Help” key and a prompt about how to obtain help information will appear. Then press another key and
relevant help information will be shown if available.
Close the current help information
When the help information show at the center of the screen. Press the the help information again to close it.
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Front Panel
Figure 2.1 Function Keys
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Function keys Description
Frequency Frequency menu (start, stop, center)
Span Frequency Span menu
Amplitude Signal amplitude menu (ref level, attenuator, pre-amp, scale, corrections)
Auto Tune Automatically setup the instrument
BW Bandwidth menu (resolution, video BW, averaging, lter)
Trace Trace setup menu and math menu
Sweep Sweep menu (time, number of sweeps, mode)
Detect Detector menu (peak, sample, average)
Trigger Trigger menu (Video Trigger/ External Trigger)
Limit Pass, Fail Limit setup menu
TG Tracking Generator menu
Demod Demodulation menu (AM, FM)
Marker Marker setup menu
Marker-> Apply marker to other analyzer functions (e.g. set center frequency to marker point)
Peak Set the marker to the highest peak
Marker Fn Marker function menu (enable, type, counter)
Meas Measurement menu (power, BW, spectrum monitor, etc...)
Meas Setup Conguration menu for an active measurements
System System setup menu
Mode Mode selection - spectrum or reection
Display Display setup (grid brightness, text, line presence)
File File browser
Preset Return to the default instrument state
Couple Control RBW, VBW, Attenuator, Freq Step, and Sweep time
Help Help menu
Save Screenshot save key
Table 2.1 Function Keys
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