HP 53150A/151A/152A
Microwave Frequency Counter
Operating
Guide
Operating Guide
This guide describes how to use the HP 53150A, 53151A, and 53152A
Microwave Frequency Counters. The information in this guide applies to
instruments having the number prefix listed below, unless accompanied
by a “Manual Updating Changes” package indicating otherwise.
SERIAL PREFIX NUMBER: 3735A and above (53150A)
3736A and above (53151A)
3737A and above (53152A)
HP 53150A/151A/152A
Microwave Frequency Counter
Copyright Hewlett- P ac ka rd
Company 1997, 1999
All Rights Reserved.
Reproduction, adaptation, or
translations without prior
written permission is
prohibited, except as allowed
under the copyright laws.
Printed: May 1999
Printed in USA
Manual part number
53150-90001
Certification
and Warranty
Certification
Hewlett-Packard Company
certifies that this product met
its published specification at the
time of shipment from the
factory. Hewlett-Packard
further certifies that its
calibration measurements are
traceable to the United States
National Institute of Standards
and Technol ogy (formerly
National Bureau of Standards),
to the extent allowed by the
Institute’s calibration facility,
and to the calibration facilities
of other International
Standards Organization
members.
Warranty
HP warrants HP hardware,
accessories and supplies against
defects in materials and
workmanship for a period of one
year from date of shipment. If
HP receives notice of such
defects during the warranty
period, HP will, at its option,
either repair or replace products
which prove to be defective.
Replacement products may be
either new or like-new.
HP warrants that HP software
will not fail to execute its
programming instructions, for
the period specified above, due
to defects in material and
workmanship when properly
installed and used. If HP
receives notice of such defects
during the warranty period, HP
will replace software media
which does not execute its
programming instructions due
to such defects.
For detailed warra nty
information, see back matter.
Safety Considerations
General
This product and related
documentation must be
reviewed for familiarizat ion
with this safety marki ngs and
instructions before operation.
Before Cleaning
Disconnect the product from
operating power before
cleaning.
Warning Symbols That May
Be Used In This Book
Instruction manual symbol; the
product will be marked with
this symbol when it is necessary
for the user to refer to the
instruction manual.
Indicates hazardous voltages.
Indicates earth (ground)
terminal.
or
Indicates terminal is connected
to chassis when such connection
is not apparent.
Indicates Alternating current.
Indicates Direct current.
Safety Considerations
(contd)
WARNING
BODILY INJUR Y OR DEATH
MAY RESULT FROM
FAILURE TO HEED A
WARNING. DO NOT
PROCEED BEYOND A
WARNING UNTIL THE
INDICATED CONDITIONS
ARE FULLY UNDERSTOOD
AND MET .
CAUTION
Damage to equipment, or
incorrect measurement data,
may result from failure to
heed a caution. Do not
proceed beyond a CAUTION
until the indicated conditions
are fully understood and met.
Safety Earth Ground
An uninterruptible safety earth
ground must be maintained
from the mains power source to
the product’s ground circuitry.
WARNING
WHEN MEASURING POWER
LINE SIGNALS, BE
EXTREMELY CAREFUL AND
ALWAYS USE A
STEP-DOWN ISOLATION
TRANSFORMER WHICH
OUTPUT IS COMPATIBLE
WITH THE INPUT
MEASUREMENT
CAPABILITIES OF THIS
PRODUCT. THIS PRODUCT’S
FRONT AND REAR PANELS
ARE TYPCIALLY AT EARTH
GROUND.
TO MEASURE AC POWER
LINE SIGNALS WITHOUT AN
ISOLATION TRANSFORMER.
For additional safety and
acoustic noise information, see
back matter.
THUS, NEVER TRY
Hewlett-Packard Company 8.NC.NL.A.11.03.97.R1.P.CW1C3NC
Santa Clara Division
5301 Stevens Creek Boulevard
Santa Clara, California 95052-8059
Contents
In This Guide
Operating Guide Contents and Organization x
Related Documents xi
Types of Service Available
if Your Instrument Fails xii
Standard Repair Services (Worldwide) xii
Express Repair/Performance Calibration
Service (USA Only) xii
Repair Instrument Yourself xii
Repackaging for Shipment xiii
Description of the Microwave Frequency Counter xiv
Options xv
Hardware xv
Support xv
Accessories Supplied and Available xvi
Accessories Supplied xvi
Accessories Available xvi
Manuals Supplied xvi
HP 53150A/151A/152A Quick Reference Guide xvii
1 Getting Started
The Front Panel at a Glance 1-2
The Front Panel Indicators at a Glance 1-3
The Front Panel Menus at a Glance 1-4
The Display Annunciators at a Glance 1-5
The Display Special Characters at a Glance 1-6
The Rear Panel at a Glance 1-7
Operating Guide iii
Contents
Operating the Counter 1-8
Turning the Counter On 1-10
Turning the Display Backlight Off or On 1-11
Using the Menu 1-12
Displaying the Menu 1-12
Navigating in the Menu and Changing Settings 1-12
Setting the Serial Port Baud Rate (Menu
Example) 1-15
Selecting the Input Channel 1-16
Measuring Frequency 1-17
Measuring Relative Frequency 1-19
Offsetting a Frequency Measurement 1-20
Measuring Power (Channel 2 Only) 1-22
Selecting the Unit of Measurement for Power 1-23
Measuring Relative Power 1-24
Offsetting a Power Measurement 1-24
Using Power Correction 1-28
Selecting a Power-Correction Profile 1-28
Entering Data Points in a Power-Correction
Profile 1-28
Setting the Measurement Rate 1-32
Setting the Number of Averages 1-33
Setting the Resolution 1-34
2 Operating Your Frequency Counter
Introduction 2-2
Chapter Summary 2-2
How this Counter Wor k s for You 2-3
Summary of the Measurement Sequence 2-4
Using the Selection Keys 2-5
Sequencing Through the Menu 2-5
Numeric Entry 2-6
Changing States 2-7
iv Operating Guide
Contents
Using the Clear and Reset/Local Keys 2-9
Acknowledging Messages 2-9
Other Function Selection Keys 2-10
Measuring Frequency 2-12
Setting the Resolution
and the Measurement Rate 2-14
Setting the Resolution 2-14
Resolution Setting Example 2-15
Setting the Measurement Rate 2-16
Rate Setting Example 2-16
Setting the Number of Averages 2-17
Averages Setting Example 2-17
Measuring Relative Frequency 2-20
Relative Frequency Example 2-20
Offsetting a Frequency Measurement 2-21
Frequency Offset Example 2-21
Measuring Power 2-24
Power Measurement Example 2-24
Measuring Relative Power 2-26
Relative Power Example 2-26
Offsetting a Power Measurement 2-27
Power Offset Example 2-27
Using Power Correction 2-30
Power Correction Example: Selecting a Correction
Profile 2-33
Power Correction Example: Editing Data Point
Values 2-35
Using the Menu 2-39
Navigating in the Menu and Changing Settings 2-41
Reference Oscillator (REF OSC)2-42
Do Self Test 2-43
Battery Voltage (BATT VOLTAGE)2-43
Operating Hours (OP HOURS)2-43
Operating Guide v
Contents
Model Number, Firmware Version,
Serial Number, and Option Codes 2-44
Preset 2-45
RS-232 Serial Port Data Rate (BAUD)2-46
Frequency Modulation (FM)2-46
Channel 1 Low-Pass Filter (CH1 LPF)2-46
Recall User Settings (RECALL)2-46
Save User Setti n gs (SAVE)2-46
Power Correction (PWR CORR)2-46
3 Specifications
Introduction 3-2
A Rack Mounting the Counter
Rack Mounting the Counter A-2
B Messages
Overview B-2
Status Messages B-2
Self-Test Messages B-3
Error Messages B-4
C Using the Battery Option
Overview C-2
Operating the Counter from the Batteries C-2
Operating the Counter
from a DC Power Source C-3
Replacing the Batteries C-4
Removing the Batteries C-4
Installing Batteries C-5
vi Operating Guide
Index
Contents
Charging the Batteries C-8
Precautions C-9
Operating Guide vii
Contents
viii Operating Guide
In This Guide
This book is the operating guide for the HP 53150A (20 GHz), 53151A
(26.5 GHz), and 53152A (46 GHz) Frequency Counters. It consists of a
table of contents, this preface, a quick reference guide, three chapters,
three appendices, and an index.
This preface contains the following information:
• Operating Guide Contents and Organization pg. x
• Related Documents pg. xi
• Types of Service Available if Your Instrument Fails pg. xii
• Repackaging for Shipment pg. xiii
• Description of the Microwave Frequency Counter pg. xiv
• Options pg. xv
• Accessories Supplied and Available pg. xvi
• Manuals Supplied pg. xvi
Operating Guide ix
In This Guide
Operating Guide Contents and Organization
Table of Contents.
The Quick Reference Guide consists of a Menu Tree (tear-out sheet)
that serves as a tool to trigger your memory or get you quickly
reacquainted with the instrument.
Chapter 1 (Getting Started ) is a quick-start guide that gives you a brief
overview of the Counter’s keys, indicators, menus, display, and
connectors. A graphical procedure for performing a measurement is also
provided.
Chapter 2 (Operating Your Frequency Counter) is an operator’s
reference. You are given an overview of each group of front-panel keys,
operating functions, and menus followed by a series of exercises that guide
you through the operation of the Counter.
Chapter 3 (Specifications) lists the specifications and characteristics of
the Counter.
Appendix A (Rack Mounting the Counter) provides rack-mounting
procedures for the Counter.
Appendix B (Messages) lists and explains all of the messages that are
displayed on the Counter’s front panel and/or sent over the RS-232 serial
interface.
Appendix C (U sing the Battery Option) explains how to use the
Counter with the Battery option.
Index
x Operating Guide
In This Guide
Related Documents
For more information on frequency counters refer to the following Series
200 Application Notes:
• Fundamentals of Electronic Frequency Counters,
Application Note 200—HP part number 02-5952-7506.
• Understanding Frequency Counter Specifications,
Application Note 200-4—HP part number 02-5952-7522.
• Fundamentals of Time and Frequency Standards,
Application Note 52-1—HP part number 02-5952-7870.
Operating Guide xi
In This Guide
Types of Service Available if Your Instrument Fails
If your Counter fails within one year of original purchase, HP will repair it
free of charge. If your instrument fails after your one-year warranty
expires, HP will repair it, or you can repair it yourself.
There are three types of repair services:
• Standard repair service—if downtime is not critical.
• Express Repair/Performance Calibration Service—if downtime is
critical.
• Owner repair—repair the unit yourself using usin g the Assembly-L evel
Service Guide.
Standard Repair Services (Worldwide)
Contact your nearest HP Service Center to arrange to have your Counter
repaired.
Express Repair/Performance Calibration Service (USA Only)
If downtime is critical, you can receive your repaired Counter via
overnight shipment. Just call 1-800-403-0801 and ask for Express
Repair/Performance Calibration Service. When your Counter is repaired,
it is returned via overnight shipment.
Repair Instrument Yourself
If you choose to repair the instrument yourself or would like more details
on self test and calibration, use the procedures in the Assembly-Level
Service Guide.
xii Operating Guide
In This Guide
Repackaging for Shipment
For the Express Repair/Performance Calibration Service described above,
return your failed Counter to the designated HP Service Center, using the
instrument’s original shipping carton (if available). HP notifies you when
your failed instrument is received.
If the instrument is to be shipped to HP for service or repair, be sure you
do the following:
• Attach a tag to the instrument identifying the owner and indicating
the required service or repair. Include the instrument model number
and full serial number.
• Place the instrument in its original container (if available) with
appropriate packaging material.
• Secure the container with strong tape or shipping bands.
If the original shipping container is not available, place your unit in a
container with at least 4 inches of compressible packaging material
around all sides of the unit. Use static free packaging materials to avoid
additional damage to your unit.
HP suggests that you always insure shipments.
Operating Guide xiii
In This Guide
Description of the Microwave Fre quency Counter
The HP 53150A, 53151A, and 53152A Microwave Frequency Counters are
capable of measuring frequencies from 10Hz to 125 MHz on Channel 1
and from 50 MHz to 20 GHz (53150A), 26.5 GHz (53151A), and 46 GHz
(53152A) on Channel 2. These frequency counters are also capable of
measuring power on Channel 2 (in the same frequency ranges). All three
Counters have a maximum frequency resolution of 1 Hz.
The HP 53150A/151A/152A Counter provides HP-IB and RS-232 serial
interfaces and are suitable for bench-top and ATE operation.
The basic measurement functions of the HP 53150A/151A/152A Counter
includes Frequency, Relative Frequency, Frequency Offset, and Power
(including Power Offset and Relativ e Power). All of these features are
accessible from the front panel and over the HP-IB and RS-232 interfaces.
The HP 53150A/151A/152A Counter includes the following additional
measurement functions and features that are designed specifically for
manufacturing and service applications:
• 1, 2, 5, and 10 MHz external reference capability
• Optional high-stability oven oscillator for high-accuracy needs and
lengthened calibration cycles
• Frequency and power offset capabilities for relative
measurements
• SCPI programming capability
Programmable control is performed via an HP-IB or an RS-232 serial
interface. The HP-IB and RS-232C ports are standard for the HP
53150A/151A/152A.
xiv Operating Guide
In This Guide
Options
The options available for the HP 53150A/151A/152A Microwave
Frequency Counter are listed following this paragraph. Specifications for
the options are listed in Chapter 3, “Specifications.” Options ordered with
the Counter are installed at the factory and are ready for operation on
delivery. Refer to the "Retrofitting Options" chapter in the HP
53150A/151A/152A Assembly-Level Service Guide for information on
installing options in the field.
Hardware
• High Stability Oven Timebase, Option 001
• Battery/DC Power Input, Option 002
• Rack Mount Kit, Option 1CM
Support
• 3-year Return to HP for Repair, Option W30
• 3-year Return to HP for Calibration, Option W32
• 3-year Return to HP for Standards Compliant Calibration,
Option W34
• 5-year Return to HP for Repair, Option W50
• 5-year Return to HP for Calibration, Option W52
• 5-year Return to HP for Standards Compliant Calibration,
Option W52
Operating Guide xv
In This Guide
Accessories Supplied and Available
Accessories Supplied
• Power cord, 2.3 meters
(Part number dependent upon destination country.)
Accessories Available
• Automotive Power Adapter (HP P/N 53150-60214)
• Battery (HP P/N 53150-80010)
• Battery Charger (HP P/N 53150-60217)
(Includes Automotive Power Adapter)
• HP-IB Cables (HP P/N 10833A/B/C/D)
• RS-232 Cable (HP P/N 53150-60215)
Manuals Supplied
HP 53150A/151A/152A Operating Guide—this guide
(HP P/N 53150-90001)
HP 53150A/151A/152A Programming Guide
(HP P/N 53150-90002)
HP 53150A/151A/152A Assembly-Level Service Guide
(HP P/N 53150-90003)
xvi Operating Guide
HP 53150A/151A/152A Quick Reference Guide
The Quick Reference Guide is designed for experienced
users of the HP 53150A/151A/151A/152A Frequency
Counter. It is intended to be used as a tool to trigger your
memory. If you are using the Counter for the first time,
HP recommends that you at least read Chapter 1, “Getting
Started,” first.
The Quick Reference Guide, which follows this page,
consists of a menu tree that may be torn out of the guide
for external use.
Reference
Quick
xvii
Quick
Reference
xviii
HP 53150A/151A/152A
Frequency Counter
On/Off
+/-Clear
Menu
Reset/
Local
REF OSC > INT
REF OSC > EXT
PRESET
Reference
Reference
Quick
Quick
SAVE > 0 to 9
RECALL > 0 to 9
CH1 LPF > OFF
CH1 LPF > ON
FM > AUTO
FM > OFF
BAUD > 9600
BAUD > 4800
BAUD > 2400
BAUD > 1200
BAUD > 19200
BAUD > 14400
HP 53150A >
OP 9999 HRS
BATT VOLTAGE
0.0
DO SELF TEST
PWR CORR > OFF
PWR CORR > 0
to
PWR CORR > 9
< 00-111-222 >
Freq
Offset
Rate
00 000 000 000 000
49 999 999 999 999 ± 99.99
Freq
Offset
Rate
RATE FAST
RATE MED
< SN 999999 >
AVERAGES 01
AVERAGES 99
RATE SLOW
RATE HOLD
<OPTNS -- -- -- -- >
Pwr
Offset
Avg
± 00.00
Pwr
Offset
Avg
HPIB
Resol
± 00.00
HPIB ADDR > 0
HPIB ADDR > 30
HPIB
Resol
RESOL 1 HZ
RESOL 10 KHZ
RESOL 100 KHZ
RESOL 1 MHZ
QR-1
Quick
Reference
QR-2
1
Getting Started
1342
Chapter 1 Getting Started
The Front Panel at a Glance
The Front Panel at a Glance
53150A
POWER
11
Standby
Menu
Reset/
Local
Shift
Freq
Offset
Rate
On/Off
Clear
Ch 12
Rel Freq
Offset
Avg On
Rel Pwr
Offset
GHz MHz kHz Hz
dB
dBm
Watts
mW
uW
%
MODIFY
Pwr
Offset
Avg
+/-
HPIB
Resol
Enter
20
1 Standby indicator
2 Power/Standby switch
3 LCD display
4 Channel 1 input connector
5 Channel 2 input connector
6 Display Power / dBm/W key (Channel 2)
7 Offset On/Off / Relative Power key
(Channel 2)
Channel Selection key
8
9 Offset On/Off / Relative Frequency key
11 Selection keys active indicator
12 Selection (arrow) keys
13 Resolution / HPIB key
14 Enter key
15 Average / Power Offset key
16 Sign (+/–) key
17 Rate / Frequency Offset key
18 Clear / Backlight On/Off ke y
19 Reset/Local / Menu key
20 Shift key
20 GHz Counter
Ext Rel
Hold
Rate Rmt SRQ
Error
Shift
FREQ
Chan
Select
Rel Freq Rel Pwr
Offset
On/Off
POWER
Channel 2 50 MHz to 20 GHz
Gate
dBm/ W
Display
Power
Offset
On/Off
CHANNEL 1
10 Hz to 125 MHz
1M W
DAMAGE
+30 dBm
CHANNEL 2
DAMAGE
+27 dBm
5678912 1013 11141516171819
50 W
10 Gate indicator
1-2 Operating Guide
Chapter 1 Getting Started
The Front Panel Indicators at a Glance
The Front Panel Indicators at a Glance
The front panel includes three LED indicators. These are listed and
described in the following table.
Indicator Description
The Standby indicator is lit whenever the
POWER
Standby
Main ~ Power switch on the rear panel is turned ON,
and the POWER switch on the front panel is OFF
(out). During Standby, most of the instrument’s
circuits do not receive power. However, the timebase
and the cooling fan are powered so that the
temperature in the timebase components remains
stable, and if the Battery option is installed, the
battery-charging circuits a re powered. When you
press the POWER switch on the front panel, the
Standby indicator goes off, and all of the Counter’s
circuits receive power.
1
NOTE
When the LED indicator between the arrow keys
flashes, the arrow keys can be used to navigate and
change values in menus.
When you make a change in a menu, always press
the Enter key to save the setting and exit the menu.
The Gate LED indicator flashes to indicate the rate
FREQ
Chan
Select
Gate
at which measurements are triggered. The flash rate
of the LED varies with the settings of the
measurement rate (Rate key) and the measurement
resolution (Resol key). The flash rate of th e LED
provides a rough indication of the number of
measurements th at are being tak en in a given per iod
of time.
It is normal for the fan in the Counter to run when the Counter is in
Standby mode. Power is supplied to the timebase whenever the
Main ~ Power switch is on to maintain long term measurement reliability,
and the fan helps maintain timebase temperature stability.
Operating Guide 1-3
Chapter 1 Getting Started
The Front Panel Menus at a Glance
The Front Panel Menus at a Glance
Shift
Menu
Reset/
Local
REF OSC > INT
REF OSC > EXT
11
SAVE > 0 to 9
RECALL > 0 to 9
PRESET
HP 53150A >
OP 9999 HRS
< 00-111-222 >
< SN 999999 >
<OPTNS -- -- -- -- >
CH1 LPF > OFF
CH1 LPF > ON
FM > AUTO
FM > OFF
BAUD > 9600
BAUD > 4800
BAUD > 2400
BAUD > 1200
BAUD > 19200
BAUD > 14400
Rate
RATE FAST
RATE MED
RATE SLOW
RATE HOLD
BATT VOLTAGE
0.0
DO SELF TEST
PWR CORR > OFF
PWR CORR > 0
to
PWR CORR > 9
Avg
AVERAGES 01
AVERAGES 99
Resol
RESOL 1 HZ
RESOL 10 KHZ
RESOL 100 KHZ
RESOL 1 MHZ
Shift
HPIB
Resol
HPIB ADDR 0
HPIB ADDR 30
1-4 Operating Guide
Ch 12
Rel Freq
Offset
Avg On
Rel Pwr
Offset
Chapter 1 Getting Started
The Display Annunciators at a Glance
The Display Annunciators at a Glance
GHz MHz kHz Hz
dB
dBm
Watts
mW
uW
%
Ext Rel
Hold
Rate Rmt SRQ
Error
Shift
Annunciator Description
Ch 1 or Ch 2 Indi c at es w hich channel is selected t o m eas ur e an input signal.
Freq I ndi c at es t hat the value displayed is a f req ue ncy reading.
Rel Freq The displayed frequency value is relative to a previo us ly zer oe d val ue.
Freq
Offset
Avg On The displayed frequen cy val ue is the result of a number of indi vi du al frequency
Pwr The Counter is set to measure Power (Channel 2 only).
Rel Pwr The displayed power measurement is relative to a previously zeroed power value.
Pwr
Offset
dB, dBm, W,
µW, %
mW,
Ext Ref The Counter is using an external refer ence signal for frequenc y m easurements.
Hold Indicates the Counter is in Hold (single- measurement) mode.
Rmt, SRQ Shows the current state of the HP-IB interface
Error Indicates that a front-pane l key command is unacceptab le in the cur r ent context.
Shift Indicates that all front-panel keys are redefined to the func t io n pr in ted above the key.
The displayed frequency value is offset by a previously entered frequency value.
measurements that have been averaged.
The displayed power v alue i s offset by a p rev i ously entered power val ue.
Indicates the unit of m easurement for the cu rrently displayed p ow er value.
Provides a real-time ana lo g re pr esentation of the Power meas ur em ent (intended for
peaking and similar procedures).
(Rmt = Remote operation via H P- I B; SRQ = Ser vice ReQuest).
Shows the amount of charge in the batteries (if the Battery option is installed).
1
Operating Guide 1-5
Chapter 1 Getting Started
The Display Special Characters at a Glance
The Display Special Characters at a Glance
Special
Characters
11
NOTE
The first two special characters shown above are intended to help y ou
navigate within the Menu. When the right pointer ( ) is flashing, it
indicates the current setting for the selected Menu option. When the left
pointer ( ) is flashing, it indicates that you can use the selection (arrow)
keys to change the setting for the current Menu option.
Description
Points to the current value for a Menu setting.
Indicates that the value for the current Menu setting can be
changed using the selection (arrow) key s.
When the letter “c” is displayed in the hundredths position of
the power display, Power Correction mode is in effect.
1-6 Operating Guide
Chapter 1 Getting Started
The Rear Panel at a Glance
The Rear Panel at a Glance
1
Main ~ Power
10 9 7
2 43 6
Reference 10 MHz
11 TO 18 VDC
EXT DC
Auxillary
In
or
Out
RS-232
8
1 AC Input/Power module (Senses
incoming voltage and adjusts
automatically)
2 External Reference connector (BNC)
1, 2, 5, or 10 MHz Input
10 MHz Output
3 Fuse Holder (behind door)
4 Auxiliary connector (not populated)*
5
Made in U.S.A.
with domestic and foreign content
OPTIONS
001 Oven Time Base
002 Battery
WARNING:
To avold electric shock,
do not remove covers.
No user-serviceable parts inside.
Refer all servicing to qualified personnel.
This unit must be earth grounded.
AC POWER
100 – 130 VAC, 50/60/400 Hz 75 VA
220 – 240 VAC, 50/60 Hz 75 VA 250 V
5 Battery compartment (optional) or cover plate
6 HP-IB (IEEE-488.1) Interface connector
7 RS-232 Interface connector (RJ12)
8 Main AC Power On indicator
9 EXT DC power-input connector (functional only
when Battery option is installed)
10 Main ~ Power switch
ISM 1-A
FUSE
1.0 A T
1
* The Auxiliary connector is not installed on standard production units.
Operating Guide 1-7
Chapter 1 Getting Started
Operating the Counter
Operating the Counter
The procedures in this section are designed to familiarize you with the
Frequency Counter’s features and controls. HP suggests that you follow
the steps for each of the se pro cedure s, e ven i f y ou d o not pres ent ly ne ed to
make any measurements or to adjust any of the Counter’s settings. The
following procedures are provided:
• Turning the Counter On
• Turning the Display Backlight Off or On
11
• Selecting an Input Channel
• Using the Menu
• Setting the Serial Port Baud Rate
• Measuring Frequency
• Measuring Relative Frequency
• Offsetting a Frequency Measurement
• Measuring Power
• Measuring Relative Power
• Offsetting a Power Measurement
• Using Power Correction
• Setting the Measurement Rate
• Setting the Number of Averages
• Setting the Resolution
1-8 Operating Guide
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