INSTRUCTION MANUAL
4240 SERIES
RF POWER METER
REV DATE 01/19/2011
MANUAL P/N 98406700A
CD P/N 984
Wireless Telecom Group
25 EASTMANS ROAD, PARSIPPANY, NJ 07054
Telephone: 973-386-9696
Fax: 973-386-9191
Email: boonton@boonton.com
Web:
www.wtcom.com
06799A
Boonton 4240 Series RF Power Meter
INSTRUCTION MANUAL, 4240 SERIES RF POWER METER
Revision date 01/19/2011
© Copyright in 2005-2011, by BOONTON Electronics, a subsidiary of the Wireless Telecom
Group, Inc.
Parsippany, NJ, USA. All rights reserved.
P/N 98406700A
This manual covers instrument serial numbers: 11001 and higher.
K-Connector® is a registered trademark of Anritsu Corporation.
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Contents
Boonton 4240 Series RF Power Meter
SAFETY SUMMARY
The following general safety precautions must be observed during all phases of operation and maintenance
of this instrument. Failure to comply with these precautions or with specific warnings elsewhere in this
manual violates safety standards of design, manufacture, and intended use of the instrument. Boonton
Electronics assumes no liability for the customer’s failure to comply with these requirements.
THE INSTRUMENT MUST BE GROUNDED
To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground.
The instrument is equipped with a NEMA three conductor, three prong power cable. The power cable must
either be plugged into an approved three-contact electrical outlet or used with a three-contact to a twocontact adapter with the (green) grounding wire firmly connected to an electrical ground in the power
outlet.
DO NOT OPERATE THE INSTRUMENT IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove instrument covers. Component replacement and internal adjustments
must be made by qualified maintenance personnel. Do not replace components with the power cable
connected. Under certain conditions dangerous voltages may exist even though the power cable was
removed, therefore; always disconnect power and discharge circuits before touching them.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person, capable or rendering first aid and
resuscitation, is present.
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT
Do not install substitute parts or perform any unauthorized modifications or the instrument. Return the
instrument to Boonton Electronics for repair to ensure that the safety features are maintained.
Contents
iii
Boonton 4240 Series RF Power Meter
SAFETY SYMBOLS
This safety requirement symbol (located on the rear panel) has been adopted by the
International Electro-technical Commission, Document 66 (Central Office) 3, Paragraph
5.3, which directs that an instrument be so labeled if, for the correct use of the instrument,
it is necessary to refer to the instruction manual. In this case it is recommended that
reference be made to the instruction manual when connecting the instrument to the proper
power source. Verify that the correct fuse is installed for the power available.
The CAUTION symbol denotes a hazard. It calls attention to an operational procedure,
practice or instruction that, if not followed, could result in damage to or destruction of
part or all of the instrument and accessories. Do not proceed beyond a CAUTION symbol
until its conditions are fully understood and met.
The NOTE symbol is used to mark information which should be read. This information
can be very useful to the operating in dealing with the subject covered in this section.
The HINT symbol is used to identify additional comments which are outside of the
normal format of the manual, however can give the user additional information about the
subject.
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Contents
Boonton 4240 Series RF Power Meter
1. General Information..............................................................................................1-1
1.1 Organization.......................................................................................................... 1-1
1.2 Description............................................................................................................1-2
1.3 Features................................................................................................................. 1-2
1.4 Accessories ........................................................................................................... 1-5
Standard ............................................................................................................... 1-5
Optional................................................................................................................ 1-5
Sensors ................................................................................................................. 1-5
1.5 Models, Options and Configurations .................................................................... 1-5
1.6 Specifications........................................................................................................1-6
SENSOR INPUTS ............................................................................................... 1-6
FEATURES .........................................................................................................1-6
UNCERTAINTIES .............................................................................................. 1-7
MEASUREMENT SYSTEM ..............................................................................1-7
CALIBRATION SOURCE.................................................................................. 1-7
EXTERNAL INTERFACES ............................................................................... 1-8
PHYSICAL AND ENVIRONMENTAL CHARACTERISTICS .......................1-8
OTHER CHARACTERISTICS........................................................................... 1-9
REGULATORY CHARACTERISTICS ............................................................. 1-9
2. Installation..............................................................................................................2-1
2.1 Unpacking & Repacking....................................................................................... 2-1
2.2 Power Requirements............................................................................................. 2-2
2.3 Connections ..........................................................................................................2-2
2.4 Preliminary Check ................................................................................................ 2-3
3. Getting Started.......................................................................................................3-1
3.1 Organization.......................................................................................................... 3-1
3.2 Operating Controls, Indicators and Connections.................................................. 3-1
3.3 Operation ..............................................................................................................3-6
3.3.1 Menu Key........................................................................................................ 3-9
3.3.2 Sensor Key.................................................................................................... 3-15
3.3.3 FREQ Key..................................................................................................... 3-19
3.3.4 AVG Key. ..................................................................................................... 3-19
3.3.5 Zero/Cal Key (single key press operation). .................................................. 3-19
3.3.6 REL Level Key (single key press operation)................................................ 3-20
4. Operation................................................................................................................4-1
4.1 Sensor Calibration................................................................................................. 4-1
4.2 Zeroing..................................................................................................................4-1
Contents
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Boonton 4240 Series RF Power Meter
4.3 Dynamic Range..................................................................................................... 4-4
4.4 Filtering................................................................................................................. 4-5
4.5 Noise ..................................................................................................................... 4-5
4.6 Measurement Time ............................................................................................. 4-10
4.7 High Frequency Accuracy .................................................................................. 4-11
4.8 Waveform Sensitivity ......................................................................................... 4-12
4.9 Chart Recorder Operation................................................................................... 4-14
4.10 Bar Graph Operation......................................................................................... 4-14
5. Remote Operation..................................................................................................5-1
5.1 GPIB Configuration.............................................................................................. 5-1
5.2 RS-232 Configuration........................................................................................... 5-1
5.3 SCPI Language ..................................................................................................... 5-2
5.3.1 SCPI Structure ...............................................................................................5-2
5.3.2 Long and Short Form Keywords....................................................................5-2
5.3.3 Subsystem Numeric Suffixes......................................................................... 5-2
5.3.4 Colon Keyword Separators............................................................................ 5-3
5.3.5 Command Arguments and Queries................................................................ 5-3
5.3.6 Semicolon Command Separators................................................................... 5-3
5.3.7 Command Terminators .................................................................................. 5-3
5.3.8 4240 Series SCPI Implementation................................................................. 5-3
5.4 Basic Measurement Information........................................................................... 5-5
5.4.1 Service Request.............................................................................................. 5-5
5.5 SCPI Command Reference ................................................................................... 5-6
5.5.1 IEEE 488.2 Commands.................................................................................. 5-6
*CLS .................................................................................................................... 5-6
*ESE ....................................................................................................................5-6
*ESR? ..................................................................................................................5-7
*IDN?................................................................................................................... 5-7
*OPC....................................................................................................................5-7
*OPC? .................................................................................................................. 5-7
*OPT? .................................................................................................................. 5-8
*RST .................................................................................................................... 5-8
*SRE .................................................................................................................... 5-8
*STB? ..................................................................................................................5-9
*TRG.................................................................................................................... 5-9
*TST?................................................................................................................... 5-9
*WAI....................................................................................................................5-9
5.5.2 CALCulate Subsystem................................................................................. 5-10
CALCulate:LIMit:CLEar[:IMMediate]............................................................. 5-10
CALCulate:LIMit:FAIL?................................................................................... 5-10
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Boonton 4240 Series RF Power Meter
CALCulate:LIMit:LOWer[:POWer] ................................................................. 5-10
CALCulate:LIMit:UPPer[:POWer] ................................................................... 5-11
CALCulate:LIMit:LOWer:STATe .................................................................... 5-11
CALCulate:LIMit:UPPer:STATe...................................................................... 5-11
CALCulate:LIMit[:BOTH]:STATe................................................................... 5-11
CALCulate:MATH:ARGA................................................................................5-12
CALCulate:MATH:ARGB................................................................................ 5-12
CALCulate:MATH:DATA? .............................................................................. 5-12
CALCulate:MATH:OPERator........................................................................... 5-12
CALCulate:MODe............................................................................................. 5-12
CALCulate:REFerence:COLLect...................................................................... 5-13
CALCulate:REFerence:DATA.......................................................................... 5-13
CALCulate:REFerence:STATe .........................................................................5-13
CALCulate:STATe ............................................................................................ 5-13
CALCulate:UNITs............................................................................................. 5-13
5.5.3 CALibration Subsystem............................................................................... 5-14
CALibration:AUTOcal ...................................................................................... 5-14
CALibration:FIXedcal ....................................................................................... 5-14
CALibration:ZERO............................................................................................ 5-14
5.5.4 DISPlay Subsystem...................................................................................... 5-15
DISPlay:ACTive[?]............................................................................................5-15
DISPlay:CLEar .................................................................................................. 5-15
DISPlay:LIN:RESolution ..................................................................................5-15
DISPlay:LOG:RESolution................................................................................. 5-15
DISPlay:LABel:MODE ..................................................................................... 5-15
DISPlay:LABel:TEXTA....................................................................................5-16
DISPlay:LABel:TEXTB.................................................................................... 5-16
DISPlay:LABel:TEXTC.................................................................................... 5-16
DISPlay:LABel:TEXTD....................................................................................5-16
5.5.5 FETCh Queries ............................................................................................ 5-17
FETCh:CW:POWer? ......................................................................................... 5-17
FETCh:KEY?..................................................................................................... 5-17
5.5.6 INITiate and ABORt Commands................................................................. 5-18
ABORt ...............................................................................................................5-18
INITiate:CONTinuous ....................................................................................... 5-18
INITiate[:IMMediate[:ALL]] ............................................................................5-18
5.5.7 MEASure Queries........................................................................................ 5-19
MEASure:POWer? ............................................................................................5-19
MEASure:VOLTage? ........................................................................................ 5-19
5.5.8 MEMory Subsystem .................................................................................... 5-20
MEMory:SNSR:CF?.......................................................................................... 5-20
MEMory:SNSR:CWRG?................................................................................... 5-20
MEMory:SNSR:INFO? ..................................................................................... 5-20
MEMory:SYS:LOAD........................................................................................ 5-20
MEMory:SYS:STORe ....................................................................................... 5-20
5.5.9 OUTPut Subsystem...................................................................................... 5-21
Contents
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Boonton 4240 Series RF Power Meter
OUTPut:LEVel[:POWer] ..................................................................................5-21
OUTPut:SIGNal................................................................................................. 5-21
OUTPut:RECorder:FORCe ...............................................................................5-21
OUTPut:RECorder:MAX .................................................................................. 5-21
OUTPut:RECorder:MIN.................................................................................... 5-21
OUTPut:RECorder:SOURce .............................................................................5-22
5.5.10 READ Queries ........................................................................................... 5-23
READ:CW:POWer? .......................................................................................... 5-23
5.5.11 SENSe Subsystem...................................................................................... 5-24
SENSe:CORRection:CALFactor....................................................................... 5-24
SENSe:CORRection:DCYCle ........................................................................... 5-24
SENSe:CORRection:FREQuency ..................................................................... 5-24
SENSe:CORRection:OFFSet............................................................................. 5-24
SENSe:FILTer:STATe ......................................................................................5-25
SENSe:FILTer:TIMe ......................................................................................... 5-25
5.5.12 STATus Commands...................................................................................5-26
STATus:DEVice:CONDition? ..........................................................................5-26
STATus:DEVice:ENABle ................................................................................. 5-26
STATus:DEVice:EVENt? ................................................................................. 5-27
STATus:DEVice:NTRansition .......................................................................... 5-27
STATus:DEVice:PTRansition........................................................................... 5-27
STATus:OPERation:CONDition? ..................................................................... 5-28
STATus:OPERation:ENABle............................................................................ 5-28
STATus:OPERation:EVENt?............................................................................ 5-28
STATus:OPERation:NTRansition..................................................................... 5-29
STATus:OPERation:PTRansition......................................................................5-29
STATus:PRESet ................................................................................................5-29
STATus:QUEStionable:CONDition?................................................................ 5-30
STATus:QUEStionable:ENABle....................................................................... 5-30
STATus:QUEStionable:EVENt?....................................................................... 5-30
STATus:QUEStionable:NTRansition................................................................ 5-31
STATus:QUEStionable:PTRansition ................................................................5-31
STATus:QUEStionable:CALibration:CONDition? ..........................................5-31
STATus:QUEStionable:CALibration:ENABle ................................................. 5-32
STATus:QUEStionable:CALibration:EVENt? .................................................5-32
STATus:QUEStionable:CALibration:NTRansition .......................................... 5-32
STATus:QUEStionable:CALibration:PTRansition........................................... 5-32
5.5.13 SYSTem Subsystem...................................................................................5-33
SYSTem:BEEP[:ENABle] ................................................................................5-33
SYSTem:BEEP:IMMediate............................................................................... 5-33
SYSTem:COMMunicate:GPIB:ADDRess ........................................................ 5-33
SYSTem:COMMunicate:GPIB:EOI..................................................................5-33
SYSTem:COMMunicate:GPIB:LISTen............................................................ 5-33
SYSTem:COMMunicate:GPIB:TALK..............................................................5-34
SYSTem:COMMunicate:SERial:BAUD........................................................... 5-34
SYSTem:COMMunicate:SERial:BITS ............................................................. 5-34
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Boonton 4240 Series RF Power Meter
SYSTem:COMMunicate:SERial:PARity.......................................................... 5-34
SYSTem:COMMunicate:SERial:SBITs............................................................ 5-34
SYSTem:ERRor[:NEXT]? ................................................................................5-35
SYSTem:ERRor:CODE?................................................................................... 5-35
SYSTem:ERRor:COUNt? ................................................................................. 5-35
SYSTem:PRESet ...............................................................................................5-35
SYSTem:VERSion?........................................................................................... 5-35
5.5.14 INSTrument:VERSion Commands............................................................ 5-36
INSTrument:VERSion:FIRMware? ..................................................................5-36
INSTrument:VERSion:FPGA?..........................................................................5-36
5.5.15 SCPI Command Summary......................................................................... 5-37
5.5.16 4230 Emulation GPIB Commands.............................................................5-42
5.5.17 HP 437B Emulation GPIB Commands...................................................... 5-44
5.5.18 HP 438A Emulation GPIB Commands .....................................................5-47
6. Application Notes...................................................................................................6-1
6.1 Pulse Measurements .............................................................................................6-1
6.1.1 Measurements Fundamentals......................................................................... 6-1
6.1.2 Diode Detection ............................................................................................. 6-3
6.1.3 4240 Series Features ...................................................................................... 6-4
6.2 Measurement Accuracy ........................................................................................ 6-5
6.2.1 Uncertainty Contributions.............................................................................. 6-5
6.2.2 Discussion of Uncertainty Terms................................................................... 6-6
6.2.3 Sample Uncertainty Calculations................................................................... 6-9
7. Maintenance ...........................................................................................................7-1
7.1 Safety .................................................................................................................... 7-1
7.2 Cleaning ................................................................................................................ 7-1
7.3 Inspection.............................................................................................................. 7-1
7.4 Firmware Upgrade ................................................................................................ 7-1
7.5 Firmware Upgrade Instructions ............................................................................ 7-2
8. Appendix A SCPI Error Messages.......................................................................8-1
8.1 SCPI Error Messages ............................................................................................ 8-1
9. Appendix B Warranty & Repair..........................................................................9-1
Repair Policy................................................................................................................ 9-1
Limited Warranty......................................................................................................... 9-1
Contents
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Boonton 4240 Series RF Power Meter
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Contents
Boonton 4240 Series RF Power Meter
1. General Information
This instruction manual provides you with the information you need to install, operate and maintain the
Boonton 4240 Series RF Power Meter. Section 1 is an introduction to the manual and the instrument.
Throughout this manual, the designation “4240” will be used to mean the 4240 Series RF Power Meter,
which includes both the single-channel Model 4241 and the dual-channel Model 4242.
1.1 Organization
The manual is organized into seven sections and three Appendices, as follows:
Section 1 - General Information presents summary descriptions of the instrument and its principal
features, accessories and options. Also included are specifications for the instrument.
Section 2 - Installation provides instructions for unpacking the instrument, setting it up for operation,
connecting power and signal cables, and initial power-up.
Section 3 - Getting Started describes the controls and indicators and the initialization of operating
parameters. Several practice exercises are provided to familiarize you with essential setup and control
procedures.
Section 4 - Operation describes the display menus and procedures for operating the instrument locally
from the front panel.
Section 5 - Remote Operation explains the command set and procedures for operating the instrument
remotely over GPIB bus.
Section 6 - Application Notes describes automatic measurement procedures and presents an analysis of
measurement accuracy. Definitions are provided for key terms used in this manual and on the screen
displays.
Section 7 - Maintenance includes procedures for installing software and verifying fault-free operation.
Section 8 - Appendix A - Error Messages defines the messages that are displayed when errors occur.
Section 9 - Appendix B - Warranty and Repair Policy states the policies governing the return and
replacement of modules and instruments during and after the warranty period.
General Information
1-1
Boonton 4240 Series RF Power Meter
1.2 Description
The Model 4240 is a digital signal processor based, single or dual channel, solid state RF power meter. It is
capable of measuring RF power levels from -70 dBm to +44 dBm. The frequency range and power level
are sensor dependent. Boonton 51000 series sensors provide measurement capabilities for frequencies from
10 kHz to 100 GHz. The 4240 is available as the single-channel Model 4241 or the dual-channel Model
4242.
1.3 Features
• Software. A 32-bit Digital Signal Processor running control software provides display, I/O and
system memory functions for the instrument. Software updates are easily made using either the
GPIB or RS232 interfaces.
• Alphanumeric Display. The alphanumeric LCD provides clear, unambiguous readouts of the
instrument's setup and measurement values. Simultaneous display of both channels is available in
dual channel mode. A bar graph provides a display of the channel's measured value for nulling
and peaking applications.
Figure 1-1. 4240 Series RF Power Meter
1-2
General Information
Boonton 4240 Series RF Power Meter
• ual Independent Channels. When equipped with the optional second measurement channel, the
D
instrument can display two CW signals simultaneously. Each channel is calibrated and all channel
parameters are channel-independent.
•
Selectable Ranging. Any of seven measurement ranges, or autoranging, can be selected during
instrument setup. The selection will be held until it is changed, or until the instrument is turned
off. When measuring signals with levels that fall within a narrow range, selecting one specific
instrument range may reduce measurement time. Autoranging is useful if the RF signal level is
unknown, or if RF signals with widely varying levels are to be measured.
• optimized through the use of
Selectable Filtering. Measurement speed and display stability can be
lectable filtering. Filter times can be adjusted up to 20 seconds maximum in 50 millisecond
se
increments.
•
Zeroing. Automatic zeroing (nulling of offsets for the sensor and input channel) is done
independently on each range to eliminate zero carryovers.
•
Power Sensors.
waveguide applications are available for use with the Model 4240. Frequency Calibration factors
traceable to NIST standards are stored in each power sensor’s EEPROM and downloaded to the
instrument. Data sensor adapters are supplied with the Model 4240, however, the power sensor
must be ordered separately.
A wide range of diode and thermocouple power sensors for both coaxial and
Diode sensors measure the voltage across a precision resistor, using specially selected diodes.
Detection is square law (true RMS) over approximately the lower two-thirds of the sensor's
dynamic range, and peak detecting over the upper portion. Because the instrument is calibrated
for sine waves over the entire range, measurements at the top o
range are valid only for non-modulated signals. In the RMS region, linearity is excellent, and any
signal type can be measured. The diode range has been extended into the peak detecting region
with the use of real time shaping for the diode curve. When coupled with the high sensitivity of
the diode, such shaping allows a dynamic range of 90 dB. Diode sensors are rugged and have an
overload headroom of more than 5 dB for continuous signals. The dynamic range in the RMS
region can be extended further through use of an external attenuator.
Thermal sensors measure the voltage developed across a dissimilar metal junction caused by the
thermal gradient generated by the RF power being measured. Because these sensors are heat
detecting, they provide true RMS response over their entire range. Very high peak powers (15 to
30 watts) can be accommodated for very short duty cycles and still provide valid results. The
dynamic range is 50 dB. Thermal sensors are not as sensitive as diode sensors.
ne-third of the sensor's dynamic
The data sensor adapter contains non-volatile memory for storage of the calibration data. In
ddition, calibration data for up to four sensors can a
memory. The user can enter both the linearity and high frequency sensor calibration correction
data which are supplied with each sensor. For sensors ordered with the Model 4240, the
calibration data is loaded into the data sensor adapter prior to shipment. When the frequency of
the RF signal to be measured by one of these sensors is entered, the instrument looks up the
ppropriate calibration factors, interpolates as necessary, and automatically applies the a
to the measured value. Calibration factors for sensors ordered with the instrument are stored in the
plastic pouch attached to the inside of the instrument's top cover.
•
Built-In Precision Calibrator. A 50 MHz step calibrator, traceable to NIST, enhances
measurement accuracy and reliability. The user-selectable automatic calibration routine calibrates
most sensors and the instrument in steps over the full dynamic range.
General Information
be stored in the instrument's non-volatile
correction
1-3
Boonton 4240 Series RF Power Meter
•
Simple Instrument Setup and Operation. In the operating mode the functions: Averaging Time,
and Frequency menus are selected with a single keystroke. Values for these parameters are
displayed and can be adjusted by using the arrow and enter keys. Additional operating parameters
can be modified through the menu driven structure accessible via the <Menu> and <Sensor> keys
• ne key press operations. To provide for ease of use operation of the instrument functions that
O
are used often are performed with a single push of a button. Common operations such as Zeroing
the channel, performing a 0 dBm calibration and setting a Reference Level can be done si
pressing the Zero/Cal and REF Level key respectively.
Zero/Cal – When measuring low level signals it is important to zero the channel prior to
measuring the signal. When the Active Channel is measuring levels below approximately -50
dBm, depressing the “Zero/Cal” key will u
for fast zeroing of the channel so that the needed measurement can be performed faster.
The user may also perform a 0 dBm calibration by one key stroke of the “Zero/Cal” button.
Simply connect the sensor to a 0 dBm source and press the “Zero/Cal” key. The instrument detects
that a 0 dBm signal is present and sets a calibration factor accordingly to indicate 0.00 dBm.
The Zero/Cal sub-menu can be displayed by first pressi
key. From there the user chooses the function (Zero, Fixed Cal, Auto Cal) and the channel to
perform the calibration on.
REF Level – Often relative measurements are required especially whe
and losses. One key press of the Ref/Level key makes this job easier and faster to perform. Simply
connect the active channel’s sensor to the input signal of the system under test. Press the
Ref/Level key and the reference level is set! Next connect the sensor to the system output and read
the gain or loss directly from the reference level measurement.
The REF Level sub-menu can be displayed by first pressing the Menu key followed by the REF
Level key. From there the user may LOAD or SET the reference level on either channel.
se the measured reading as the zero offset. This allows
ng the Menu key followed by the Zero/Cal
n measuring system gains
mply by
• Chart Recorder O
available for appl
channel 1, channel 2 or the active channel.
• Flexible Remote Control. All instrument functions except power on/off can be controlled
remotely via the standard GPIB bus interface or RS232 connection. Setup
is menu driven; front panel indicators keep the user informed of bus activity. Remote co
ramming is performed using industry-standard SCPI programming syntax. The prog 4230
emulation mode is provided for users that prefer back compatibility with legacy Boonton products
as the 4230such
• me instrument configurations are used
Stored Configurations. For applications in which the sa
repeatedly, up to 10 complete setups can be stored and recalled.
utput. A 0 to 10 volt dc output, proportional to the measurement values, is
ication to a chart recorder. The Recoreder Output is selectable to track either
of interface parameters
series and 4220 line of power meters.
ntrol
1-4
General Information
Boonton 4240 Series RF Power Meter
1.4 Accessories
Optional 42 cessories that can be ordered from Boonton Electronics. A
channel installed the instrument. One or more Boonton
51000 series pow plied as part of the instrument, but
must be ordered s
Table 1-1
Selection Part Number
Standard
Optional
95105501A Typ
Sensors
1.5 Mod
odel 4241. One measu n the front panel.
M
odel 4242. Two measurement channels; sensor and calibrator connectors located on the front panel.
M
pt -01. Rear Panel Channel input(s).
O
Opt -02. Rear Panel Calibrator output.
Opt -30. Warranty option: Extend factory warranty to 3 years
40 ac data sensor adapter for each
along with the AC power cord is supplied with
e requer sensors ar ired. The power sensors are not sup
eparately. Additional available accessories include the following:
. Mod F/F d to end)
a el 95004701A Adapter, 41-2A (for connecting Model 41-2A cables en
b. Mod Bu A cables end
c. Mod Ra
d. Mod 1A Ad
el 95004901A lkhead Connector F/F, 41-2A (for connecting Model 41-2
to en
d)
1 01Ael 9540 5 ck Mounting Kit
el 9510900 ditional Sensor Data Adapters
Accessories for the 4240 Series
Description
56810400A Line Cord (US)
98601300x* Manual CD, Boonton Measurement Instruments (CD-R
(x* - denotes revision level)
545504000 Fuse, 0.5A 250V
95401501A Rack Mounting Kit
95403001A Rack Mounting Kit (Brackets only)
95403003A Rack Mounting Kit (Brackets with handles)
e N to K Adaptor (for sensors with K-Connector®)
95109101A CW Sensor Combo Cable/
95109102A CW Sensor Combo Cable/Dat
95109001A CW Sensor Data Adapter – with connector for 41-2A cable
41-2A CW Sensor Cable – 5ft (1.27 m)
41-2A/10 CW Sensor Cable – 10ft (2.54 m)
41-2A/20 CW Sensor Cable – 20ft (5.05 m)
41-2A/50 CW Sensor Cable – 50ft (12.7 m)
41-2A/100 CW Sensor Cable – 100ft (25.4 m)
95004701A F/F Adapter, 41-2A (for connecting Model 41-2A cables end to end)
95004901A
98406700A Instruction Manual 4240 Series, English (Printed w/binder)
For sensor selection, refer to the BOONTON Sensor Manual (985019).
Bulkhead Connector F/F, 41-2A (for connecting Model 41-2A cables
end to end)
Data Adapter – 5 ft (1.27 m)
a Adapter – 10 ft (2.54 m)
OM)
els, Options and Configurations
rement channel; sensor and calibrator connectors located o
General Information
1-5
Boonton 4240 Series RF Power Meter
Option designations are appended to the instrument’s base model number. For example, Model 4242-0102 would be a two-chan ent with sensor and
Specials. Custom ave –S/n appended to the model number, where n is a unique num
.6 Specifications
1
erformance specifications for the 4240 Series are listed in Table 1-2.
P
Performance sp
ay be ordered as Boonton p/n 98501900x* (x* - denotes revision level).
m
ecifications for all Boonton power sensors are found in the Boonton Sensor Manual, which
Table
SENSOR IN
RF Frequ c 1 MHz to 110 GHz
Power Ra ge: -70 to +44 dBm
Powe ta adapter and is compatible with all Boonton
diode and thermal sensors
Dyna ode sensors; up to 50 dB with thermal sensors
EATURES
F
Display Menu-driven 20 character x 4 line LCD
isplay Units MW, kW, W, mW, µW, nW, dBW, dBm,D
isplay Resolution 0.001 dB or 5 digits (in Watts mode)
D
Display Offset
imiting Individual high and low limit thresholds, -99.99 dB to +99.99 dB
L
Peak Power Mode Programmable duty cycle from 0.01 to 100.00% in 0.01 steps
Ranging
Filtering
High Frequency Cal Fact +3 dB to -3 dB in 0.01 dB steps; cal factors also stored in sensor
Reference Level -99.99 dB to +99.99 dB in 0.01 dB steps for dBr measu
may be express in % in linear mode.
PUTS
en y Range:
n
r Sensors: Accepts sensor da
mic Range: Up to 90 dB with di
each range
data adapter.
nel instrum calibrator connectors all on the rear panel.
configurations h ber.
1-2 4240 Series Performance Specifications
(Specific tice)
ors:
ations are subject to change without no
1
1
( 1 Sensor dependant )
dBuW, dBnW, dBr, %
-99.99 dB to +99.99 dB in 0.01 dB steps
Manual (7 ranges) or autoranging
Filter times to 20.00 seconds in 0.05 second increments
Automatic function;Zeroing calculates, stores, and applies zero corrections to
rements
1-6
General Information
Boonton 4240 Series RF Power Meter
Table 1-2 4240 Series Performance Specifications (continued)
NCERTAINTIES
U
easurement Accuracy Sum of following uncertainties (errors are +
M worst case): instrument
Instrume
Noise/si C wer Sensor Manual, to percent
Power Reference Uncertainty R nce: Level Accuracy
Sensor Shaping
emperature Drift R
MEASUREMENT SYSTEM
Sensor inputs: One or two sensor measurement channels.
Measurement Technique: 24 bit Sigma-delta A/D converter per channel.
CALIBRATION SOURCE
Internal Calibrator
Auto-calibration: The Calibrator is used to automatically generate linearity calibration
nt Uncertainty
gnal Percentage onvert 2 sigma noise listed in the Po
Operating Modes: Off, On CW
Frequency: 50.025 MHz ± 0.1%
Level Range: -60 to +20 dBm
Resolution: 0.1 dB
RF Connector: Type N
Source VSWR: 1.05 (reflection coefficient = 0.024)
Accuracy, 0C to 20C, NIST traceable:
pecifications a
(S re subject to change without notice)
uncertainty, noise/signal percentage, power reference uncertainty,
s , temperature drift, mismatch, and frequency
ensor shaping
c
alibration factors
+
0.23% (+0.01 dB) at full scale; +0.46% (+0.02 dB) at 1/10 full scale
of the applied
efer to Table 1-2 Power Refere
+
1.0% (+0.04 dB) typical, Power Sensor Manual
efer to Power Sensor Manual T
At 0 dBm: ±0.055 dB (1.27%)
+20 to -39 dBm: ±0.075 dB (1.74%)
-40 to -60 dBm: ±0.105 dB (2.45%)
data for CW power sensors. Can be used to provide test signals.
power level.
General Information
1-7
Boonton 4240 Series RF Power Meter
Table 1-2 4240 Series Performance Specifications (continued)
EXTERNAL INTERFACES
Remote Control: Complies with IEEE-488.1 and SCPI version 1993.
GPIB: Implements AH1, SH1, T6, LE0, SR1, RL1, PP0, DC1, DT1, C0, and E1.
RS232: Type-D connector, 9 pins.
Inputs: Front or Rear panel sensor connector; rear panel IEEE-488 connector
Outputs Front panel or optional Rear panel CAL OUT connector, 50 MHz, 100
mW max; rear panel recorder BNC connector, 9.09 kilohm impedance, 0
to 10 volts into 1 megohm (may be operated into 1 kilohm for 1V fs).
PHYSICAL AND ENVIRONMENTAL CHARACTERISTICS
Case Dimensions: 8.26W x 3.48H x 13.5D inches (21.0 x 8.9 x 34.3 cm), Half-rack width, 2U
Weight: 5 lbs (2.3kg)
Power Requirements: 90 to 264 VAC, 47 to 63 Hz, (25VA) maximum.
Operating Temperature
Storage Temperature
Humidity
Altitude
Shock
Vibration
( 2 as per MIL-PRF-28800F )
2
: 95% maximum, non-condensing
2
: Operation up to 15,000 feet
2
: Withstands ±30G, in X, Y, and Z axes
2
: Withstands 2G
(Specifications are subject to change without notice)
and RS-232 connector.
height
2
: 0 to 55 °C
2
: -30 to +60 °C
1-8
General Information
Boonton 4240 Series RF Power Meter
Table 1-2 4240 Series Performance Specifications (continued)
OTHER CHARACTERISTICS
Display: Dot matrix 80 character LCD module (4 lines by 20 characters)
Keyboard: 11 Key conductive rubber
Processor: 32-bit Digital Signal Processor
Panel setup storage: Can save and recall 10 complete “user” setups.
REGULATORY CHARACTERISTICS
CE Mark: Full compliance with the following European Union directives and standards:
RoHS: RoHS Directive 2002/95/EC
Construction: Manufactured to the intent of MIL-T28800E, Type III, Class 5, Style E
(Specifications are subject to change without notice)
Safety: Low Voltage Directive 2006/95/EC
IEC 61010 – 1 : 2001 (2
EMC: Electromagnetic Compatibility Directive 2004/108/EC
IEC 61000-3-2: 2000 Limits for harmonic current emissions
IEC 61000-3-3: 2002 Limitation of voltage changes, voltage
fluctuations and flicker
IEC 61000-4-2: 2001 Electrostatic discharge immunity test
IEC 61000-4-3: 2002 Radiated, radio-frequency, electromagnetic
IEC 61000-4-4: 2004 Electrical fast transient/burst immunity test
IEC 61000-4-5: 2001 Surge immunity test
IEC 61000-4-6: 2003 Immunity to conducted disturbances,
IEC 61000-4-11: 2004 Voltage dips, short interruptions and voltage
variations immunity test
EN 61326-1: 2006 Electrical equipment for measurement,
nd
Edition); EN 61010 – 1 : 2001 (2
field immunity test
induced by radio frequency fields.
control and laboratory use – EMC
requirements - Part 1: General requirements
nd
Edition)
General Information
1-9
Boonton 4240 Series RF Power Meter
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1-10
General Information
Boonton 4240 Series RF Power Meter
2. Installation
This section contains unpacking and repacking instructions, power requirements, connection descriptions and preliminary
checkout procedures.
2.1 Unpacking & Repacking
The 4240 Series is shipped complete and is ready to use upon receipt. Figure 2-1 shows you the various pieces included in
the packaging and the order in which they are loaded into the container. Actual details may vary from the illustration.
Note Save the packing material and container to ship the instrument, if necessary. If the original materials (or
suitable substitute) are not available, contact Boonton Electronics to purchase replacements. Store materials
in a dry environment. Refer to the Physical and Environmental Specifications in Table 1-2 for further
information.
Figure 2-1. Packaging Diagram
Installation
2-1
Boonton 4240 Series RF Power Meter
Table 2-1 4240 Series Packing List
INSTRUMENT (See also Table 1-1)
4240 Series RF Power Meter
Line Cord
Boonton Instruction Manual CD
SENSOR(S) (packaged separately)
Sensor(s)
Sensor Cable(s)
Type N to SMA Adapter (if required)
BOONTON Sensor Manual CD
For bench-top use, choose a clear, uncluttered area. Ensure that there is at least 2" of clearance at the exhaust vents on the
side panels. Pull-down feet are located on the bottom of the instrument. Rack mounting instructions are provided with the
optional rack mount kit.
2.2 Power Requirements
The 4240 Series is equipped with a switching power supply that provides automatic operation from a 90 to 260 volt, 47 to 63
Hz, single-phase, AC power source. Maximum power consumption is 15W and 25VA. For metric fuse sizes, use the metric
fuse kit supplied. Connect the power cord supplied with the instrument to the power receptacle on the rear panel. See Figure
3-2.
Caution Before connecting the instrument to the power source, make certain that a 0.5-ampere time delay fuse (type
T) is installed in the fuse holder on the rear panel.
Before removing the instrument cover for any reason, position the input module power switch to off (0 =
OFF; 1 = ON) and disconnect the power cord.
2.3 Connections
Sensor(s) Connect the sensor that covers the frequency range of the measurement to the CHANNEL 1 sensor
connector on the front (Standard) or rear (Optional) panel, as follows. Connect the sensor to the sensor
cable. Connect the sensor cable to the CHANNEL 1 Input, holding the red mark on the cable connector up.
For two-channel measurements, use the same procedures to connect the second sensor to the CHANNEL 2
Input.
Note
If the sensor connector is not a type N, install the appropriate adapter (from the accessories kit) on the
calibrator output connector.
2-2
Installation
Boonton 4240 Series RF Power Meter
Recorder If a recorder is to be used to record measurement data, connect the recorder to the recorder BEC connector
on the rear panel. Output impedance is 9.06 kilohms, and the output voltage range is 0 to 10 volts dc.
Remote If the instrument is to be operated remotely using the GPIB (IEEE-488) bus, connect the instrument to the
bus using the rear panel GPIB connector and appropriate cable. For RS-232 control, the rear panel 9 pin
RS-232 connector should be used. In most cases, it will be necessary to configure the interface used via
the Menu > SETUP > IEEE or Menu > SETUP > RS232 menus.
2.4 Preliminary Check
The following preliminary check verifies that the instrument is operational and has the correct software installed. It should
be performed before the instrument is placed into service. To perform the preliminary check, proceed as follows:
1. Connect the AC (mains) power cord to a suitable AC power source; 90 to 264 volts AC, 47 to 63 Hz, with a
capacity in excess of 75 W. The power supply will automatically adjust to voltages within this range.
2. Attach the sensor data adapter(s) to the front panel CHANNEL connector(s).
3. Set the POWER switch to the ON (1) position.
4. Verify that "BOONTON ELECTRONICS, 4242 RF Power Meter, REV XXXXXXXX" is momentarily
displayed where XXXXXXXX represents the revision code. (Note: Model number 4241 display for single
channel instruments.) While the sign-on screen is displayed the phrase “ A WIRELESS TELECOM GROUP
COMPANY” is scrolled along the second line.
5. Verify that the measurement display showing "CH 1" only for Model 4241 or "CH 1" and "CH 2" for Model
424
2. Other data on the display will depend upon previous settings.
Figure 2-2. Typical Power-On Display
Installation
2-3
Boonton 4240 Series RF Power Meter
6. Press the <MENU> key and select DIAGNOSTICS with the down arrow key. Press <ENTER>.
Verify the following sub-menu:
RTN
SELFTEST <
7. Press <Enter> to execute the self-test. The items tested are as follows:
SWITCHES
RECORDER
S
8. Use the <Down Arrow> key to move the "<" cursor to SWITCHES and press <ENTER>. Press each
9. st will sequentially
10. Press <MENU> to return to the measurement display.
11.
12. Press the <AVG> key and verify that the filter time and number of samples appear for each active
13. With each installed sensor connected to the CA
PROCESSOR
RAM MEMORY
EEPROM
Each test will display the OK message if passed. When the test is completed the menu will reappear.
front panel key, avoiding <MENU> until last. Each ke
<MENU> will exit the test and return to the MENU.
Use the <Down Arrow> key to select RECORDER and press <ENTER>. This te
send a DC voltage in 1 volt steps to the recorder output BNC connector on the rear panel. The test
will continue until <MENU> is pressed. Use a DC voltmeter to verify correct operation.
Press the <Sensor> key and verify that the RF Sensor serial number(s) appear under the channel
heading(s). An active cha
channel.
<Zero/Cal> key and select ZERO function for the active channel. Verify the ZERO operation
completes successfully.
nnel with no sensor installed will report a table number.
y press will result in an identifying message;
L OUT, press the <Menu> key followed by the
2-4
14.
Next press the <Menu> key followed by the <Zero/Cal> key and select the FIXED CAL function for
the active channel. Verify the CALIBRATE operation completes successfully.
15.
Repeat steps 13 and 14 for channel 2 if installed.
16.
Connect a GPIB controller to the Model 4240. Verify that the instrument can be addressed to Listen at
its IEEE bus address, and set to Remote. The display must show the correct status on
of the display. For message passing, the line terminators for the controller and the Model 4240 must
be compatible for both Listen and Talk. Use <Menu> <SETUP> <IEEE> to set address and
terminators for the 4240. Address the Model 4240 to Listen/Remote and send the command "*IDN?"
EOL. Then address the Model 4240 to Talk (controller to listen) and verify that the correct
identification string is returned. For example using SCPI emulation the ID string returned would be as
follows;
BOONTON ELECTRONICS, 4242, 11002, 20100717
17. Connect a dumb terminal or PC serial terminal to the Model 4240. Use a null modem if the terminal is
wired as DCE. For message communication to take place, the parameters of the serial connection and
message strings must agree between the terminal and the Model 4240. Use <Menu> <SETUP> <RS232> to set parameters for the 4240. Send the command or "*IDN?" EOL and verify that the correct
identification string is returned.
the bottom line
Installation
Boonton 4240 Series RF Power Meter
3. Getting Started
This chapter will introduce the user to the 4240 Series. The chapter will identify objects on the front and rear panels, identify
display organization, list the initial configuration of the instrument after reset, demonstrate how to calibrate the sensors, and
provide practice exercises for front panel operation. For additional information you should see Chapter 4 "Operation."
3.1 Organization
Subsection 3.2 Operating Controls, Indicators and Connections identifies the control features and connections on the front
and rear panels.
Subsection 3.3 Operation identifies the front panel keys, their functions and the menu structure while describing the various
display modes.
3.2 Operating Controls, Indicators and Connections
Figures 3-1 and 3-2 illustrate the controls, indicators and connectors on the front and rear panels, respectively, of the standard
instrument. Refer to Table 3-1 for a description of each of the illustrated items. Connectors indicated by an asterisk (*) may
be front or rear-mounted, depending on the option selected. The function and operation of all controls, indicators and
connectors are the same on the standard and optional models.
Getting Started
3-1
Boonton 4240 Series RF Power Meter
Figure 3-1. Standard 4240 Series RF Power Meter - Front Panel
Table 3-1 Operating Controls, Indicators and Connections
Reference #
Front Rear Nomenclature Function
1 1 Internal Calibrator The output of the built-in 50MHz programmable calibrator is available from a
Type-N connector located on the front, or optionally on the rear panel of the
instrument. This calibrator is used to automatically calibrate sensor offset and
linearity, and can also be used as a general purpose calibration signal source.
2 2 Channel Inputs One or two Channel inputs are located on the front, or optionally on the rear
panel of the instrument. These are 10-pin precision connectors designed to accept
only Boonton CW power sensors.
Caution Do not attempt to connect anything other than a
Boonton power sensor and sensor data adapter to the Channel inputs!
The Channel inputs are not measurement terminals and cannot be used
for other than the intended purpose.
3 Display Screen LCD readout of the measurements and user interface for editing of the
instrument's operating parameters.
3-2
Getting Started
Boonton 4240 Series RF Power Meter
Table 3-1 Operating Controls, Indicators and Connections
Reference #
(continued)
Front Rear Nomenclature Function
4 ◄ and ► Keys In entry mode, pressing ◄advances the cursor to the left. In the measurement
mode of operation pressing the ◄ key sets the Active channel to Linear
measurement units (Watts, %). In entry mode, pressing ►advances the cursor to
the right. In the measurement mode of operation pressing the ►key sets the
Active channel to Log measurement units (dBm, dBr).
5 ▲ and ▼ Keys Used for incrementing or decrementing numeric parameters, selecting from lists,
or scrolling through multi-line displays. In the measurement mode of operation
pressing the ▲ key moves the Active Channel cursor up on the display. For
example if the active channel is set to 2, pressing the ▲key will cause channel 1
to be the active channel. Pressing the ▼ key moves the Active Channel cursor
down on the display. If the active channel is set to 1, pressing the ▼ key will
cause channel 2 to be the active channel.
6 Enter Key In entry mode, initiates the procedure to change a parameter. In parameter entry
mode, terminates the current command and changes the parameter to the last
displayed value. In the measurement mode, display the active channels
CHANNEL menu.
7 Power Switch Turns the instrument off and on.
8 <Menu> Key Displays and allows editing of the instrument's operating parameters. Returns
instrument to local mode when operating in the bus remote mode. Escapes back
to measurement screen from any menu.
9 <Sensor> Key Displays the serial number of the installed sensors and allows for editing of the
sensor parameters.
10 <FREQ> Key Selects the operating frequency display.
11 <AVG> Key Selects the filter averaging display for the measurement value.
12 <Zero/CAL> Key One Key Press Operation. When measuring low level signals it is important to
zero the channel prior to measuring the signal. When the Active Channel is
measuring levels below approximately -50 dBm, depressing the <Zero/Cal> key
will use the measured reading as the zero offset. This allows for fast zeroing of
the most sensitive range of the channel so that the needed measurement can be
performed faster.
The user may also perform a 0 dBm Fixed Calibration by one key stroke of the
<Zero/Cal> button. Simply connect the sensor to a 0 dBm source and press the
<Zero/Cal> key. The instrument detects that a 0 dBm signal is present and sets a
calibration factor accordingly to indicate 0.00 dBm.
The Zero/Cal menu can be displayed by first pressing the <Menu> key followed
by the <Zero/Cal> key. From there the user chooses the function (Zero, Fixed
Cal, Auto Cal) and the channel to perform the calibration on.
Getting Started
3-3
Boonton 4240 Series RF Power Meter
Table 3-1 Operating Controls, Indicators and Connections
Reference #
(continued)
Front Rear Nomenclature Function
13 <REF Level> Key Often relative measurements are required especially when measuring system gains
and losses. One key press of the Ref/Level key makes this easier and faster to
perform. Simply connect the active channel’s sensor to the input signal of the
system under test. Press the Ref/Level key and the reference level is set! Next
connect the sensor to the system output and read the gain or loss directly from the
reference level measurement.
The REF Level menu can be displayed by first pressing the <Menu> key followed
by the <REF Level> key. From there the user may LOAD or SET the reference
level on either channel.
14 Recorder Provides a DC voltage proportional to the measured values for use by an external
recorder.
15 RS232 9-pin D-sub connector for connecting the power meter to the remote control Serial
Bus. Communication parameters can be configured through the <SETUP <RS232>
menu.
16 GPIB 24-pin GPIB (IEEE-488) connector for connecting the power meter to the remote
control General Purpose Instrument Bus. GPIB parameters can be configured
through the <SETUP <IEEE> menu.
17 AC Line Input A multi-function power input module is used to house the AC line input, main
power switch, and safety fuse. The module accepts a standard AC line cord,
included with the power meter. The power switch is used to shut off main
instrument power. The safety fuse may also be accessed once the line cord is
removed. The instrument’s power supply accepts 90 to 264VAC, so no line voltage
selection switch is necessary.
Caution Replace fuse only with specified type and rating:
0.5 A-T (time delay type), 250VAC
3-4
Getting Started
Boonton 4240 Series RF Power Meter
Figure 3-2. 4240 Series - Rear Panel
(Shown without optional rear panel connectors not installed)
Getting Started
3-5
Boonton 4240 Series RF Power Meter
3.3 Operation
The Model 4 c e r e o i e c h o l
240 an b configu ed for op rati n v a th six swit hes on t e fr nt pane ;
y s opera )
Pressing ke wi ri th instrum t t ne . flo c rt t in ru nt c mand structure is
shown in gu 3-5. Th u> ey rv E A E y t ca el e c e operat ny point and return
to the m sur ent screen.
To chan e e he row ey o p r. Press t e < nt key and then use
the up/down arrow eys to scroll through th ram hen e entered, use the left/right arrow keys
to position th cursor u er e n ber tha be the rro ke s to ncrement/decrement
the num Holdi h o e l in pi o m t th ugh the selection.
Within a sub u e i r re aye hen the urrent screen has
addition a n that can b obt ed by scrol itio are possible:
Additonal freat res introduced in the 4240 are the ‘s le key ess op ation’ f r th o/ al> n REF Level> keys.
See secti 3. .5 a d 3 6 r f her det ils. Also th arr s nd e <Ent r> key have sp ial functions while
measure nt d
Arrow keys group el io A v h n e a l e ur ent uni m b c mplished by use of
the arrow ey h n s m e o a
Up Arro ke es the Active Cha ne u on e splay. For e e if the activ ch nel is set to 2, pressing
the <Up Arrow> ke will cau e ch nne 1 t be e activ ch e
Down Arrow ey es the Active Chann r lay. Fo ex p if e activ channel is set to 1,
pressing e < ow w> ey ll c us e annel.
Left Ar w key. Pressi this key sets the ve Ch ent units (Watts, %).
Right Arrow key ress g t k Ac ve Chan L su ent u ts Bm B .
Enter key. When in the measurem uses the instrument to drop down
into the CHANNELS menu using the Active Channel as a pointer to the associated channels menu. This provides faster
settings of channel parameters such as units, resolution, duty cycle, offset, range, alarm setting and limits.
(
a y ll b ng e en o the xt submenu A w ha of he st me ’s om
fi re e <Men k se es as an SC P ke o nc th urr nt ion from a
ea em
ge a valu , us t ar k s t osition the cursor to the desired paramete h E er>
k e pa
ber. ng t e up/down arr w k y wil itiate repeat mode to allow ra d m ve en ro
men , th ∧ ∨ ind cato s a displ d in the upper right potion of the display w c
al inform tio e ain ling with the up/down arrow keys. Three cond ns
1. Use the up ar w k y to cro scr al infor ati n.
∧ ro ae s ll the een upwa d for additior n m o
2. ∨ Use the wn rro f mat n.
3. ∧ ∨ Use the up/down a additional information.
u
3
me s are displaye .
. S ect
k s w ile i mea urement od of per tion.
w y. Mov n
k
D
th k wi a e chann
ro ng Acti annel to Linear measurem
the
y s a th l.
. Mov
n Arro
. P in his ey sets the ti nel to og mea rem ni (d , d r)
rrown keys to scoll the screen upward/downward for
n of the cti e C an el and th ch nne ’s m as em ts ay e a co
> <FREQ> <A <Menu> <Sensor VG> <Zero/Cal>
eter list. W
t is to
l cursor o p the di
l
ent mode of operation pressing the <Enter> key ca
changed,
ing e pr er
el cu sor down on the disp
l 2 to be the active ch
a number is to b
n use the up/down
a
ann
1
single ke pres tion
o e <ZereC a d <
xampl e an
r am le th e
1
<REF Le l>
ye nd th um a w i
or do w key to scroll the screen downward for additional in
io
1
ve
econ n .3. fo urt a ow key th
3-6
Getting Started
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