Boonton Electronics 4230A Service Manual

MODEL 4230A

RF POWER METER

INSTRUCTION MANUAL

BOONTON ELECTRONICS 25 EASTMANS ROAD PARSIPPANY, NEW JERSEY 07054-0465

TELEPHONE: [phone] FAX: [phone] E-MAIL: [e-mail]

MANUAL P/N 98102400A
DATE 10/98

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 instruments. 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 three conductor, three prong AC power cable. The power cable must either be plugged into an approved
three-contact electrical outlet or used with a three-contact to a two-contact adapter with the (green) grounding wire firmly
connected to an electrical ground at 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 of rendering first aid and resuscitation, is
present.

DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.

Do not install substitute parts of perform any unauthorized modification of the instrument. Return the instrument to
Boonton Electronics for repair to ensure that the safety features are maintained.

This safety requirement symbol has been adopted by the International Electrotechnical
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, and that the switch on the rear
panel is set to the applicable operating voltage.

The CAUTION sign denotes a hazard. It calls attention to an operation procedure,

CAUTION

WARNING

practice, or the like, which, if not correctly performed or adhered to, could result in
damage to or destruction of part or all of the equipment. Do not proceed beyond a
CAUTION sign until the indicated conditions are fully understood and met.

The WARNING sign denotes a hazard. It calls attention to an operation procedure.,
practice, or the like, which, if not correctly performed or adhered to, could result in
injury of loss of life. Do not proceed beyond a warning sign until the indicated conditions
are fully understood and met.

This SAFETY REQUIREMENT symbol has been adopted by the International
Electrotechnical Commission, document 66 (Central Office)3, Paragraph 5.3 which
indicates hazardous voltage may be present in the vicinity of the marking.

WARRANTY

Boonton Electronics (Boonton) warrants its products to the original
Purchaser to be free from defects in material and workmanship for a
period of one year from date of shipment for instrument, and for one
year from date of shipment for probes, power sensors and accessories.
Boonton further warrants that its instruments will perform within all
current specifications under normal use and service for one year from
date of shipment. These warranties do not cover active devices that
have given normal service, sealed assemblies which have been opened
or any item which has been repaired or altered without Boonton's
authorization.

Boonton's warranties are limited to either the repair or replacement, at
Boonton's option, of any product found to be defective under the
terms of these warranties.

There will be no charge for parts and labor during the warranty period.
The Purchaser shall prepay shipping charges to Boonton or its
designated service facility and shall return the product in its original or
an equivalent shipping container. Boonton or its designated service
facility shall pay shipping charges to return the product to the Purchaser.
The Purchaser shall pay all shipping charges, duties and taxes if a
product is returned to Boonton from outside of the United States.

THE FOREGOING WARRANTIES ARE IN LIEU OF ALL OTHER
WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. BE shall not be liable to any incidental or consequential
damages, as defined in Section 2-715 of the Uniform Commercial
Code, in connection with the products covered by the foregoing
warranties.

TABLE OF CONTENTS

SECTION I — GENERAL INFORMATION

Paragraph Page

1-1 Introduction ................................................................................................................................................................. 1-1

1-3 Description................................................................................................................................................................... 1-1

1-5 Features ......................................................................................................................................................................... 1-1

1-6 Power Sensors .................................................................................................................................................... 1-1

1-10 Simple Instrument Setup and Operation ...................................................................................................... 1-1

1-11 Alphanumeric Displays.................................................................................................................................... 1-1

1-12 Selectable Ranging ........................................................................................................................................... 1-1

1-13 Selectable Filtering ........................................................................................................................................... 1-1

1-14 Zeroing ................................................................................................................................................................ 1-2

1-15 Built-In Precision Calibration ........................................................................................................................ 1-2

1-16 Chart Recorder Output ..................................................................................................................................... 1-2

1-17 Optional Interface .............................................................................................................................................. 1-2

1-18 Accessories ................................................................................................................................................................... 1-2

1-20 Options ......................................................................................................................................................................... 1-2

1-21 Option -01, Rear Input ................................................................................................................................... 1-2

1-22 Option -02, Rear Calibrator .......................................................................................................................... 1-2

1-23 Option -03, RS-232 ......................................................................................................................................... 1-2

1-24 Option -30, Extended Warranty ...................................................................................................................1-2

1-25 Specifications............................................................................................................................................................... 1-2

SECTION II — INSTALLATION

2-1 Introduction ................................................................................................................................................................. 2-1

2-2 Unpacking................................................................................................................................................................... 2-1

2-3 Mounting ..................................................................................................................................................................... 2-1

2-4 Power Requirements .................................................................................................................................................2-1

2-5 Connections ................................................................................................................................................................ 2-1

2-6 Sensor ................................................................................................................................................................. 2-1

2-7 Recorder............................................................................................................................................................. 2-2

2-8 GPIB.................................................................................................................................................................... 2-2

2-9 RS-232................................................................................................................................................................ 2-2

2-10 Preliminary Check..................................................................................................................................................... 2-2

SECTION III — OPERATION

3-1 Introduction ................................................................................................................................................................. 3-1

3-3 Operating Controls, Indicators and Connectors ................................................................................................... 3-1

3-5 Operating the Instrument .......................................................................................................................................... 3-1

3-7 Measurement Display ................................................................................................................................................ 3-1

3-9 Menu Structure............................................................................................................................................................ 3-1

3-13 Menu Key..................................................................................................................................................................... 3-7

3-16 Channel Menu.................................................................................................................................................... 3-7

3-18 Setup Menu ........................................................................................................................................................ 3-7

3-20 Programming Interfaces .................................................................................................................................... 3-11

3-21a IEEE Menu .......................................................................................................................................................... 3-11

3-21b RS-232 Menu ...................................................................................................................................................... 3-11

3-22 Diagnostics Menu ............................................................................................................................................. 3-13

3-23 Sensor Key ................................................................................................................................................................... 3-13

3-31 Edit Data Menu .................................................................................................................................................. 3-15

3-32 Linearity Factors ................................................................................................................................................ 3-15

3-33 FREQUENCY Calibration Factors ................................................................................................................... 3-16

i

3-36 Save ..................................................................................................................................................................... 3-16

3-37 Freq Key ....................................................................................................................................................................... 3-16

3-40 Avg Key ....................................................................................................................................................................... 3-16

3-43 Zero/Cal Key ................................................................................................................................................................ 3-16

3-48 Ref Level Key............................................................................................................................................................... 3-18

SECTION IV — APPLICATION NOTES

4-1 Introduction ................................................................................................................................................................. 4-1

4-3 Sensor Calibration ...................................................................................................................................................... 4-1

4-4 General................................................................................................................................................................ 4-1

4-5 14-Point Linearity Data ................................................................................................................................... 4-1

4-7 High Frequency Calibration Points ............................................................................................................... 4-1

4-9 Zeroing ......................................................................................................................................................................... 4-1

4-16 Dynamic Range ...........................................................................................................................................................4-3

4-18 Filtering ........................................................................................................................................................................ 4-3

4-22 Noise ............................................................................................................................................................................. 4-4

4-23 Noise Reduction ................................................................................................................................................ 4-4

4-25 Error Computation ............................................................................................................................................4-5

4-27 Noise Error Examples ...................................................................................................................................... 4-5

4-28 Integration of Power......................................................................................................................................... 4-5

4-29 Clearing of Filter............................................................................................................................................... 4-5

4-30 Partial Results .................................................................................................................................................... 4-5

4-31 Measurement Time ..................................................................................................................................................... 4-5

4-32 Step Response.................................................................................................................................................... 4-5

4-33 Continuous Response ....................................................................................................................................... 4-5

4-34 Overhead Time .................................................................................................................................................. 4-5

4-36 Digital Filter ...................................................................................................................................................... 4-5

4-37 Default Filter Lengths ...................................................................................................................................... 4-5

4-38 Settled Measurement Time ............................................................................................................................. 4-5

4-39 Fast Mode Measurement Time ...................................................................................................................... 4-5

4-40 High Frequency Accuracy ......................................................................................................................................... 4-10

4-43 Waveform Sensitivity................................................................................................................................................. 4-10

4-48 Chart Recorder Operation .......................................................................................................................................... 4-13

4-50 Bar Graph Operation ................................................................................................................................................. 4-13

4-52 Watts Mode ........................................................................................................................................................ 4-13

4-53 dBm Mode .......................................................................................................................................................... 4-13

4-54 dBr Mode ............................................................................................................................................................ 4-14

4-55 Remote (GPIB) Operation ........................................................................................................................................... 4-14

4-56 Introduction........................................................................................................................................................ 4-14

4-58 Local Operation .................................................................................................................................................4-14

4-59 Remote Operation ............................................................................................................................................. 4-14

4-60 Bus Address ....................................................................................................................................................... 4-14

4-61 Terminating Characters ................................................................................................................................... 4-14

4-62 Listen Operation ................................................................................................................................................ 4-14

4-63 Talk Operation .................................................................................................................................................. 4-14

4-65 IEEE-488 Command Support ......................................................................................................................... 4-14

4-66 Number Formatting............................................................................................................................................ 4-15

4-67 String Format ...................................................................................................................................................... 4-17

4-68 Listen Parameter Commands ............................................................................................................................ 4-17

4-70 Listen Action Commands ................................................................................................................................. 4-17

4-71 Listen Array Commands ................................................................................................................................... 4-17

4-73 Talk Modes ......................................................................................................................................................... 4-18

4-77 Talk Mode 0 (Talk Measurement Floating Point) ...................................................................................... 4-18

4-78 Talk Mode 1 (Talk Measurement With Units) ............................................................................................ 4-18

4-79 Talk Mode 2 (Talk Error) ............................................................................................................................... 4-18

ii

4-80 Talk Mode 3 (Talk Both Channels) .............................................................................................................. 4-18

4-81 Talk Mode 4 (Talk Channel Status) ................................................................................................................ 4-19

4-82 Talk Mode 5 (Talk Instrument Status) ......................................................................................................... 4-19

4-83 Talk Mode 6 (Talk Parameter) ....................................................................................................................... 4-19

4-86 Talk Mode 7 (Talk Array) ............................................................................................................................... 4-19

4-87 IEEE-488 Bus Only Commands.................................................................................................................................. 4-20

4-88 General................................................................................................................................................................. 4-20

4-89 Talk Mode (TM) Command.............................................................................................................................. 4-20

4-90 SI Command........................................................................................................................................................ 4-20

4-94 SO Command ...................................................................................................................................................... 4-21

4-98 FI Command ......................................................................................................................................................4-21

4-102 FO Command .................................................................................................................................................... 4-21

4-107 DF Command .................................................................................................................................................... 4-22

4-108 DN Command.................................................................................................................................................... 4-22

4-109 SM (SRQ Mask) Command ........................................................................................................................... 4-22

4-110 Measured and Triggered Operation And Settled Reading ................................................................................. 4-22

4-111 General................................................................................................................................................................ 4-22

4-112 Measure Normal (MN) ................................................................................................................................... 4-23

4-113 Measure Filtered (MF) ...................................................................................................................................... 4-23

4-114 Measure Settled (MS) ....................................................................................................................................... 4-23

4-115 Measure Fast Single (MFS) ............................................................................................................................ 4-23

4-116 Measure Fast Dual (MFD) .............................................................................................................................. 4-23

4-117 Trigger Normal (TN) ....................................................................................................................................... 4-23

4-118 Trigger Filtered (TF) ........................................................................................................................................4-23

4-119 Trigger Settled (TS) ......................................................................................................................................... 4-23

4-120 Trigger Fast Single (TFS) ............................................................................................................................... 4-23

4-121 Trigger Fast Dual (TFD) ................................................................................................................................. 4-23

4-122 IEEE Programming Examples ................................................................................................................................. 4-23

4-125 Example 1........................................................................................................................................................... 4-23

4-126 Example 2........................................................................................................................................................... 4-24

4-127 Error Messages ............................................................................................................................................................ 4-24

4-129 HP Bus Emulation ...................................................................................................................................................... 4-24

4-131 Turn-on Default Conditions ............................................................................................................................ 4-24

4-132 Sending the Data Message ............................................................................................................................ 4-25

4-133 Data Output Format .......................................................................................................................................... 4-24

4-134 Sending the Require Service Message .......................................................................................................... 4-25

4-135 Service Request Mask ...................................................................................................................................... 4-25

4-136 Sending the Service Request Mask Value.................................................................................................... 4-25

4-137 Event Status Register ....................................................................................................................................... 4-25

4-138 HP Emulation Codes .......................................................................................................................................... 4-26

4-139 Remote Operation, RS-232 Interface ...................................................................................................................... 4-26

4-140 General................................................................................................................................................................ 4-26

4-141 Entering the Remote Mode ............................................................................................................................. 4-26

4-142 Returning to Local Mode................................................................................................................................. 4-26

4-143 Talk Operations .................................................................................................................................................4-26

iii

LIST OF FIGURES

Figures Page

1-1 Model 4230A Series RF Powermeter................................................................................................................... vi

1-2 Outline Dimensions ................................................................................................................................................... 1-2

2-1 Packaging Diagram.................................................................................................................................................... 2-1

3-1 Model 4230A, Front Panel Controls and Connectors ............................................................................................ 3-3

3-2 Model 4230A, Rear Panel Controls and Connectors ............................................................................................. 3-3

3-3 Measurement Display, Local Mode ......................................................................................................................... 3-5

3-4 Measurement Display, Remote Mode...................................................................................................................... 3-5

3-5 Model 4230A, Command Set ..................................................................................................................................... 3-6

3-6 Main Menu Display .................................................................................................................................................... 3-7

3-7 Channels Menu Display............................................................................................................................................. 3-7

3-8 Setup Menu Display, IEEE Installed ........................................................................................................................ 3-9

3-9 Setup Menu Display, RS-232 Installed .................................................................................................................... 3-10

3-10 IEEE Menu Display ..................................................................................................................................................... 3-11

3-11 RS-232 Menu Display ................................................................................................................................................. 3-12

3-12 Diagnostics Menu Display ........................................................................................................................................ 3-13

3-13 Sensor Display Menu ................................................................................................................................................. 3-13

3-14 Access Code ............................................................................................................................................................... 3-14

3-15 Edit Data Menu Display ............................................................................................................................................. 3-14

3-16 Cal Factor Menu Display ........................................................................................................................................... 3-14

3-17 Calibration Data Example ............................................................................................................................................ 3-16

3-18 Save Display ................................................................................................................................................................ 3-17

3-19 Frequency Display ...................................................................................................................................................... 3-17

3-20 Averaging Time Display ............................................................................................................................................ 3-17

3-21 Zero and Calibration Display..................................................................................................................................... 3-17

3-22 Reference Level Display............................................................................................................................................. 3-17

4-1 14-Point Sensor Calibration ..................................................................................................................................... 4-2

4-2 Diode Sensor Decay ................................................................................................................................................... 4-2

4-3 Thermal Sensor Decay ............................................................................................................................................... 4-3

4-4 Extended Hold Range Mode..................................................................................................................................... 4-4

4-5 Noise Reduction .......................................................................................................................................................... 4-6

4-6 Typical Error Band Specifications .......................................................................................................................... 4-7

4-7 Probability of Falling within an Error Band ......................................................................................................... 4-7

4-8 Confidence Curves, 51013 Sensor with 2.8 Second Filter ................................................................................. 4-8

4-9 Confidence Curves, 51013 Sensor with 10 Second Filter .................................................................................. 4-9

4-10 Integration of Power ................................................................................................................................................... 4-10

4-11 Fast Mode Sampling Rate ......................................................................................................................................... 4-11

4-12 Mismatch Uncertainties Chart ................................................................................................................................. 4-12

4-13 Error Due to AM Modulation (51013 Diode Sensor) ...................................................................................... 4-13

iv

LIST OF TABLES

Table Page

1-1 Performance Specifications ................................................................................................................................... 1-3

3-1 Operating Controls, Indicators, and Connectors .............................................................................................. 3-1

3-2 Channel Menu Functions .......................................................................................................................................... 3-8

3-3 Setup Menu Functions .............................................................................................................................................. 3-10

3-4 IEEE Menu Functions ................................................................................................................................................ 3-11

3-5 RS-232 Menu Functions ............................................................................................................................................ 3-12

3-6 Diagnostics Menu Functions ................................................................................................................................... 3-13

3-7 Edit Data Menu Functions ........................................................................................................................................ 3-15

3-8 Sensor Calibration Menu Functions ........................................................................................................................ 3-16

3-9 Reference Level Menu Functions ............................................................................................................................ 3-18

4-1 Listen Parameter Commands ................................................................................................................................... 4-15

4-2 Listen Action Commands ......................................................................................................................................... 4-16

4-3 Listen Array Parameter Commands........................................................................................................................ 4-17

4-4 Talk Array Commands ..............................................................................................................................................4-17

4-5 Talk Modes .................................................................................................................................................................. 4-17

4-6 Error Messages ........................................................................................................................................................... 4-20

4-7 SRQ Masks .................................................................................................................................................................. 4-22

4-8 Status Byte and Service Request Mask................................................................................................................... 4-25

4-9 Event Status Register................................................................................................................................................. 4-25

4-10 HP 437B Emulation GPIB Commands .................................................................................................................. 4-27

4-11 HP 438A Emulation GPIB Commands.................................................................................................................. 4-30

4-12 Boonton 4230A GPIB Commands............................................................................................................................. 4-32

v

Figure 1-1. Model 4230A Series RF Powermeter

vi

SECTION I

GENERAL INFORMATION

Section I

General Information

1-1. INTRODUCTION.
1-2. This instruction manual provides general information,

installation and operating instructions, and application notes
for the Model 4230A Series of RF power meters. This series
includes Model 4231A with a single measurement channel and
Model 4232A with two measurement channels. The terms
Model 4230A and 4230A used throughout this publication
refer to both models unless otherwise noted. See Figures 1-1
and 1-2.

1-3. DESCRIPTION.
1-4. The Model 4230A Series is a DSP (digital signal processor)

based family of single or dual channel, solid state RF power
meters. They are capable of measuring RF power levels from

-70 dBm to +44 dBm. The RF frequency range and power level
range are sensor dependent. Boonton 51000 series sensors
provide measurement capabilities for frequencies from 10 kHz
to 100 GHz.

1-5. FEATURES.
1-6. Power Sensors. A wide range of diode and thermocouple

power sensors for both coaxial and waveguide applications are
available for use with the Model 4230A. Sensor data adapters
are supplied with the Model 4230A, however, the power sensor
must be ordered separately.

1-7. 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 one-third of the
sensor's dynamic 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.

1-8. 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.

1-9. The sensor data adapter contains non-volatile memory for
storage of the calibration data. In addition, calibration data for
up to four sensors can be stored in the instrument's non­volatile 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
4230A, the calibration data is loaded into the sensor data
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 appropriate calibration factors,
interpolates as necessary, and automatically applies the
correction 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.

1-10. Simple Instrument Setup and Operation. In the
operating mode the functions: Frequency, Averaging Time,
Reference Level, Zeroing/Calibration 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.

1-11. 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.

1-12. 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.

1-13. Selectable Filtering. Measurement speed and display
stability can be optimized through the use of selectable
filtering. Filter times can be adjusted up to 20 seconds maximum
in 50 millisecond increments.

1-14. Zeroing. Automatic zeroing (nulling of offsets for the

1-1

Section I
General Information

sensor and input channel) is done independently on each
range to eliminate zero carryovers.

1-15. Built-In Precision Calibrator. A built-in 50 MHz
calibrator provides an accurate, stable, and convenient power
source for calibration of the instrument to specified tolerances.
The calibrator may be toggled on or off from the Setup menu.
The connector is normally mounted for front panel access,
however option-02 changes this to rear panel access.

1-16. Chart Recorder Output. A 0 to 10 volt dc output,
proportional to the measurement values, is available for
application to a chart recorder.

1-17. Optional Interface. A RS-232 option enables full service
remote control of the Model 4230A. All instrument controls
and values, except power on and off, are accessible to a bus
controller in the remote operating mode.

1-18. ACCESSORIES.
1-19. A sensor data adapter, Model 95109001A, for each

installed channel and an AC line cord are supplied with each
instrument. One or more Boonton 51000 series power sensors
are required. The power sensors are not supplied as part of the
instrument, but must be ordered separately. A five-foot power
sensor cable, Model 41-2A, is supplied with each sensor
ordered. Additional available accessories include the
following:

a. Model 41-2A/10 Sensor/Probe Interconnecting Cable

(10 ft)

b. Model 41-2A/20 Sensor/Probe Interconnecting Cable

(20 ft)

c. Model 41-2A/50 Sensor/Probe Interconnecting Cable

(50 ft)

d. Model 41-2A/100 Sensor/Probe Interconnecting Cable

(100 ft)

e. Model 95004701A F/F Adapter, 41-2A (for connecting

Model 41-2A cables end to end)

f. Model 95004901A Bulkhead Connector F/F, 41-2A (for

connecting Model 41-2A cables end to end)

g. Model 95403001A Rack Mounting Kit
h. Model 95109001A Additional Sensor Data Adapters

1-20. OPTIONS.
1-21. Option-01. Input connectors moved to rear panel.
1-22. Option-02. Calibrator type N connector moved to rear

panel.
1-23. Option-03. Replaces the IEEE-488 Interface with a RS-

232 Interface. The baud rate, data size, stop and parity bits are
programmable.

1-24. Option-30. Warranty extended to 3 years.
1-25. SPECIFICATIONS. Performance specifications of the

Model 4230A are listed in Table 1-1.

1-2

Figure 1-2. Outline Dimensions.

Section I

TABLE 1-1. PERFORMANCE SPECIFICATIONS

Parameter Specification

Frequency Range 10 kHz to 100 GHz, sensor dependent
Power Range -70 dBm to +44 dBm, sensor dependent
Power Sensors Accepts sensor data adapter and is compatible with all Boonton diode and

thermal sensors
Dynamic Range Up to 90 dB with diode sensors; up to 50 dB with thermal sensors
Inputs Front or Rear panel sensor connector; rear panel IEEE-488 connector or

optional RS-232 connector
Outputs Front panel or optional Rear panel PWR REF connector, 50 MHz, 0 dBm;

rear panel recorder BNC connector, 9.06 kilohm impedance, 0 to 10 volts

into 1 megohm (may be operated into 1 kilohm for 1V fs).
Display Menu-driven 20 character x 4 line LCD
Display Units MW, kW, W, mW, µW, nW, dBm, dBr, %
Display Resolution 0.001 (db,dBm, dBr) or 5 digits (nW, mW and W)
Display Offset -99.99 dB to +99.99 dB in 0.01 dB steps
Alarm Individual high and low limit thresholds, -99.99 dB to +99.99 dB
Peak Power Mode Programmable duty cycle from 0.01 to 100.00% in 0.01 steps
Ranging Autoranging or manual (7 ranges)
Filtering Filter times to 20.00 seconds in 0.05 second increments
Zeroing Automatic function; calculates, stores, and applies zero corrections to each

range
High Frequency Cal Factors +3 dB to -3 dB in 0.01 dB steps; cal factors for up to four power sensors

with up to 60 frequencies each may be stored in the instrument's non-

volatile memory; cal factors also stored in sensor data adapter
Reference Level -99.99 dB to +99.99 dB in 0.01 dB steps for dBr measurements
Power Reference:

Frequency 50 MHz + 1.5%
Output Level 0 dBm
Level Accuracy +0.7% (+0.03 dB) (23 degrees C) for 90 days; +0.9% (+0.04 dB) RSS,

+1.2% (+0.05 dB) worst case (0 to 55 degrees C) for 1 year

Source Impedance 50 +1 ohm
VSWR < 1.05
Harmonic Output < -50 dBc

Measurement Accuracy Sum of following uncertainties (errors are + worst case): instrument

uncertainty, noise/signal percentage, power reference uncertainty, sensor

shaping, temperature drift, mismatch, and high frequency calibration factors

Instrument Uncertainty .002% at full scale
Noise/signal Percentage Refer to Power Sensor Manual, Table 2-1
Power Reference Uncertainty Refer to Table 1-1 Power Reference: Level Accuracy and for Waveguide

sensors, refer to Power Sensor Manual, Table 2-2 Note 2

Sensor Shaping Refer to Power Sensor Manual, Tables 3-1 and 3-2

Temperature Drift Refer to Power Sensor Manual, Table 2-1
Power Requirements 100, 120, 220, or 240 VAC (±10%), 50-60 Hz or 400 Hz, 15 VA maximum
Ventilation Requirements 1 1/2" clearance after installation, top, side, rear
Temperature

Operating 0 to 55ºC

Non-operating -40 - +75ºC

General Information

1-3

Section I
General Information

TABLE 1-1. PERFORMANCE SPECIFICATIONS (CONT.)

Parameter Specification

Altitude

Operating 10,000 ft.

CE Mark: Declares conformity to European Community (EC) Council Directives:

89/336/EEC//93/68/EEC, 73/23/EEC//93/68/

EEC & Standards: EN61326-1, EN55022, EN61000-4/ -2,3,4,5,6,11, ENG1010-1
Humidity 95% non-condensing
Weight 7 lb (3.2 kg)
Dimensions 8.26 in. (21.0 cm) wide 3.48 in. (8.9 cm) high, 13.5 in (34.3 cm) deep

1-4

SECTION II

Section II

INSTALLATION

Installation

2-1. INTRODUCTION.

This section contains the installation instructions for the
Model 4230A Series RF Power Meter. It includes unpack­ing, mounting, power connections, cable connections and
priliminary checkout procedures.

2-2. UNPACKING. The instrument is shipped complete and
ready to use upon receipt. Unpack the instrument from its
shipping container and inspect it for damage that may have
occurred during shipment. Refer to figure 2-1.

NOTE

Save the packing material and container

for possible use in re-shipment of the

instrument.

2-3. MOUNTING. For bench use, choose a clean, dry and
uncluttered surface. For rack mounting, an accessory kit is
available which contains the necessary parts for mounting a
single half-width Model 4230A or two side-by-side half­width Model 4230A's (or a compatible product) in a single
19 inch rack.

2-4. POWER REQUIREMENTS. The Model 4230A has
a tapped transformer and a power entry module containing a
line voltage selector switch and two fuses. Operation is per­mitted from 100, 120, 220 and 240 Volt +-10%, 50 to 60
Hz, single phase AC power supplies.

CAUTION

so that when it is re-inserted into the module, the
desired voltage will appear in the small window in
the cover.

4. To remove the fuses, move the fuseholder tabs in
the direction of the arrow and pull the holder out.
Place a new fuse in the holder and put it back in the
slot, restoring the tab to its original position.

5. After all changes are completed, close the cover.
Make sure the alignment of the selector cylinder and
window is correct and that the cover snaps into place.

VOLTAGE FUSE IEC TYPE

100/120V 0.315A T
220/240V 0.160A T

2-5. CONNECTIONS. An AC power cable is supplied with
the instrument and a standard interconnecting cable or cable/
adapter combination is supplied with each RF Sensor. Longer
RF Sensor cables are available as accessories. All other
cables required must be supplied by the user.

2-6. Sensor. Connect the RF Sensor that is to be used for
measurement to the cable or Data Adapter-Cable combo sup­plied with the sensor. If the Data Adapter is a separate item,
also connect the cable to the adapter. Make sure that the
serial number on the Data Adapter matches the serial number
of the RF Sensor. Insert the 10-pin adapter plug into one of
the two sensor inputs. For Model 4231, only Sensor input
number 1 is active.

Always make cerain that the setting of the line voltage selec­tor switch most nearly corresponds to the voltage of the AC
power source, and that fuses of the correct rating according
to the chart just above the power entry module, are installed.

To change the line voltage selector switch or the fuses, follow
this procedure:

1. REMOVE the power cable from the power entry
module.

2. To open the power entry module, place a small
screwdriver or coin in the slot at the top of the mod­ule and gently pry the cover open.

3. Using a small screwdriver gently pry the voltage
selector cylinder from the module. Turn the cylinder

2-7. Recorder. A data recorder or other similar device can
be connected to the Recorder BNC connector on the rear
panel. The output is a DC voltage proportional to the Chan­nel 1 display value. The voltage range is 0 to 10 volts with an
output impedance of approximately 9 kohms.

2-8. GPIB. The standard instrument is equipped with an
IEEE-488 bus interface for remote operation. The connector is
located on the rear panel.

2-9. RS-232. The optional RS-232 interface can be supplied
in place of the standard IEEE-488 interface. This interface
also provides remote operation using the same command
strings. The DB-25 connector is located on the rear panel.

2-1

Section II

Installation

2-10. PRELIMINARY CHECK.

2-11. The following preliminary check verifies that the

Model 4230A is operational. It should be performed before
the instrument is placed in service. Proceed as follows:

a. Ensure that the voltage selector switch and fuses corre­spond to the AC power source voltage to be used.

b. Connect the AC power cable to the instrument and to the
power source.

c. Connect one or two RF Sensors to the instrument as de­scribed above.

d. Set the front panel OFF/ON power switch to the ON posi­tion..

e. Verify that BOONTON ELECTRONICS

423XA RF POWER METER
Rev. X.XX

is momentarily displayed.

f. Verify that the measurement display showing "CH 1" only
for Model 4231 or "CH 1" and "CH 2" for Model 4232. Other
data on the display will depend upon previous settings.

g. Press the <MENU> key and select DIAGNOSTICS with the
down arrow key. Press <ENTER>. Verify the following sub­menu:

DIAGNOSTICS

RTN
SELFTEST <
SWITCHES
RECORDER

j. Use the <Down Arrow> key to select RECORDER and
press <ENTER>. This test will sequentially 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.

k. Press <MENU> to return to the measurement display.

l. Press the <Sensor> key and verify that the RF Sensor
serial number(s) appear under the channel heading(s). An
active channel with no sensor installed will report a table
number.

m. Press the <AVG> key and verify that the filter time and
number of samples appear for each active channel.

n. Press the <REF Level> key and verify that a reference level
and mode is shown for each active channel.

o. With each installed sensor connected to the reference
output, press the <ZERO/CAL> key and select ZERO/CAL
function for the active channel. Verify the ZERO/CAL op­eration completes successfully. Repeat this operation for
the other channel if installed.

p. For standard instruments equipped with the IEEE-488 in­terface, connect a GPIB controller to the Model 4230A.
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 the bottom line of the display. For
message passing, the line terminators for the controller and
the Model 4230A must be compatible for both Listen and
Talk. Use <MAIN> <SETUP> <IEEE> to set address and
terminators for the 4230A. Address the Model 4230A to
Listen/Remote and send the command "?ID" or "*IDN?" EOL.
Then address the Model 4230A to Talk (controller to listen)
and verify that the correct identification string is returned.

h. Press <ENTER> to execute the selftest. The items tested
are:

1. Processor

2. SRAM Memory

3. EEPROM

Each test will display the OK message it it passed. When the
test is completed the menu will reappear.

i. Use the <Down Arrow> key to move the "<" cursor to
SWITCHES and press <ENTER>. Press each front panel key,
avoiding <MENU> until last. Each key press will result in an
identifying message; <MENU> will exit the test and return to
the MENU.

2-2

q. For instruments equipped with the optional RS-232 inter­face, connect a dumb terminal or PC serial terminal to the
Model 4230A. 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 4230A. Use
<MAIN> <SETUP> <RS-232> to set parameters for the
4230A. Send the command "?ID" or "*IDN?" EOL and verify
that the correct identification string is returned.

Section II

Installation

Figure 2-1. Packing and Unpacking Diagram

2-3

SECTION III

OPERATION

Section III

Operation

3-1. INTRODUCTION.
3-2. This section contains operating instructions for the

Model 4230A. It is strongly recommended that the operator
become familiar with all the material in this section and with
the application notes in Section IV before attempting to
operate the instrument; otherwise, the full capabilities of the
instrument may not be realized.

3-3. OPERATING CONTROLS, INDICATORS, AND
CONNECTORS.

3-4. See Figures 3-1 and 3-2 for the location of the operating

controls and connectors. Refer to Table 3-1 for the function
of each of these items.

3-5. OPERATING THE INSTRUMENT.
3-6. Energize the instrument by setting the POWER switch

to the ON position. The instrument will perform a self test
routine and initialize the operating parameters to the power­up values.

TABLE 3-1. OPERATING CONTROLS, INDICATORS, AND CONNECTORS

Index and
Fig. No. Nomenclature Function

3-7. MEASUREMENT DISPLAY.
3-8. The measurement screen shown in Figure 3-3 can be

configured to display one or two channels along with the
corresponding bar graph. In alarm mode, the ∧ and the ∨
symbols are displayed before the channel mode to indicate
that the measured value is above or below the defined limits.
An asterisk is displayed before the channel mode when in the
manual range mode and the measured value is below the
lower range limit indicating an uncalibrated measurement.
The alarm indicators have precedence over the range limit
display. In peak pulse mode, the
the measurement unit. The ∆ symbol is displayed when the
measurement is associated with an offset. When the
instrument is configured for remote operations over the
IEEE-488 or RS-232 bus, the last line, as shown in Figure 3­4, is always used for the bus indicators.

3-9. MENU STRUCTURE.

P

symbol is displayed after

K

1, 3-1 Sensor Connector, Channel 2 Provides the means for connecting the power sensor to channel 2

of the instrument.

2 , 3-1 Sensor Connector, Channel 1 Provides the means for connecting the power sensor to channel 1

of the instrument.

3 , 3-1 Display LCD readout of the measurements and user interface for editing

of the instrument's operating parameters.
4 , 3-1 Left Arrow Key In entry mode, advances the cursor to the left.
5 , 3-1 Up Arrow Key In entry mode, advances the cursor upwards. In parameter entry

mode, scrolls forward through the parameter list. In numerical

entry mode, advances the value to the next higher digit.
6 , 3-1 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.
7 , 3-1 Right Arrow Key In entry mode, advances the cursor to the right.
8 , 3-1 Down Arrow Key In entry mode, advances the cursor downwards. In parameter

entry mode, scrolls backwards through the parameter list. In

numerical entry mode, advances the value to the next lower digit.
9 , 3-1 Power Switch Turns the instrument off and on.
10, 3-1 0 dBm 50 MHz Connector Provides a 50 MHz, 0 dBm output for instrument calibration.

When the calibrator is off, the connector serves as a 50 Ω

termination to zero the instrument.

3-1

Section III
Operation

Index and
Fig. No. Nomenclature Function

11, 3-1 <REF Level> Key Selects the reference level menu for relative measurements.
12, 3-1 <Zero/CAL> Key Selects the zeroing and 0 dBm reference level calibration

13, 3-1 <AVG> Key Selects the filter averaging display for the measurement value.
14, 3-1 <FREQ> Key Selects the operating frequency display.
15, 3-1 <Sensor> Key Displays the serial number of the installed sensors and allows

16, 3-1 <Menu> Key Displays and allows editing of the instrument's operating

17, 3-2 Power Receptacle Provides means for connecting the AC power cord to the

18, 3-2 Fuse Protects the power circuits from overload.
19, 3-2 Voltage Selector Switches Switches the power circuits of the instrument to accommodate

20, 3-2 Recorder Connector Provides a DC voltage proportional to the measured values

21, 3-2 GPIB Connector Provides means for connecting the instrument to the IEEE-

22, 3-2 Optional Location of Provides the means of connecting the power sensor to

23, 3-2 Optional Location of Provides 50 MHz, 0 dBm output for instrument calibration.

24, 3-2 Optional Location of Provides the means of connecting the power sensor to

TABLE 3-1. OPERATING CONTROLS, INDICATORS, AND CONNECTORS (CONT)

functions.

for editing of the sensor parameters.

parameters. Returns instrument to local mode when operating
in the bus remote mode. Escapes back to measurement screen
from any menu.

instrument.

100, 120, 220 or 240 volt AC power sources.

for use by an external recorder

or RS-232 Connector 488 or RS-232 bus for remote control

Sensor Connector, Channel 2 channel 2 of the instrument.

0 dBm 50 MHz Connector

Sensor Connector, Channel 1 channel 1 of the instrument.

3-2

Section III

Operation

Figure 3-1. Model 4230A, Front Panel Controls and Connectors

Figure 3-2. Model 4230A, Rear Panel Controls and Connectors

3-3

Section III
Operation

3-10. The Model 4230A can be configured for operation via the
six switches on the front panel; <Menu>, <Sensor>,
<FREQ>, <AVG>, <Zero/CAL> and <REF Level>.
Pressing a key will bring the instrument to the next submenu.
A flow chart of the instrument's command structure is shown
in Figure 3-5. The <Menu> key also serves as an ESCAPE
key to cancel the current operation from any point and return
to the measurement screen.

3-11. To change a value, use the arrow keys to position the
cursor to the desired parameter. Press the <Enter> key and
then use the up/down arrow keys to scroll through the
parameter list. When a number is to be entered, use the left/
right arrow keys to position the cursor under the number that
is to be changed, then use the up/down arrow keys to
increment/decrement the number. Holding the up/down

arrow key will initiate repeat mode to allow rapid movement

through the selections. The <Enter> key must be pressed to

accept the current selection.

3-12. Within a submenu, the ∧∨ indicators are displayed in

the upper right portion of the display when the current screen

has additional information that can be obtained by scrolling

with the up/down arrow keys. Three conditions are possible:

a.∧ Use the up arrow key to scroll the screen upward for

additional information.

b.∨ Use the down arrow key to scroll the screen downward

for additional information.

c.∧∨ Use the up/down arrow keys to scroll the screen

upward/downward for additional information.

3-4

DUAL CHANNEL

Section III

Operation

Key:

L M M M M M ± D D D D D D U U U

( B A R G R A P H )

L M M M M M ± D D D D D D U U U

( B A R G R A P H )

SINGLE CHANNEL

L M M M M M ± D D D D D D U U U

( B A R G R A P H )

O = 0 through 9 or a decimal point
L = ∧ , ∨, (alarm mode), * (range hold-low)
MMMMM = CH1, CH2, CH1+2, CH1/2
UUU = nW, µW, mW, kW, MW, dBm, dBr, %

P

∆

K

P

∆

K

P

∆

K

Key:

Figure 3-3. Measurement Display, Local Mode

L M M M M M ± D D D D D D U U U

( B A R G R A P H )

L M M M M M ± D D D D D D U U U

R E M L S N T L K S R Q

REM = Remote mode enabled
LSN = Listen addressed
TLK = Talker addressed
SRQ = Service request activated

Figure 3-4. Measurement Display, Remote Mode

P

∆

K

P

∆

K

3-5