HP 84125C User manual

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HP 84125C
User's Guide
Microwave EMI Measurement
T
est System
ABCDE
HP Part No. 84125-90010
Printed in USA February 1999

Notice
The information contained in this document is subject to change
without notice.
Hewlett-P
ackard makes no warranty of any kind with regard to this
material, including but not limited to, the implied warranties of
merchantability and tness for aparticular purpose. Hewlett-Packard
shall not be liable for errors contained herein or for incidental
or consequential damages in connection with the furnishing,
performance, or use of this material.
Restricted Rights Legend
Use, duplication, or disclosure by the U.S. Government is subject to
restrictions as set forth in subparagraph (c) (1) (ii) of the Rights of
Technical Data and Computer Software clause at DFARS 252.227-7013
for DOD agencies, and subparagraphs (c) (1) and (c) (2) of the
Commercial Computer Software Restricted Rights clause at F
AR
52.227-19 for other agencies
.
c
 Copyright Hewlett-Packard Company 1997, 1999
All Rights Reserved. Reproduction, adaptation, or translation without
prior written permission is prohibited, except as allowed under the
copyright laws.
1400 Fountain Grove Parkway, Santa Rosa CA, 95403-1799, USA

Certication
Hewlett-P
ackard Company certies that this product met its
published specications at the time of shipment from the factory.
Hewlett-P
ackard further certies that its calibration measurements
are traceable to the United States National Institute of Standards and
T
echnology, to the extent allowed by the Institute's calibration facility,
and to the calibration facilities of other International Standards
Organization members.
Regulatory Information
Regulatory information is located in Chapter 2.
Warranty
This Hewlett-P
ackard instrument product is warranted against defects
in material and workmanship for aperiod of one year from date of
shipment. During the warranty period, Hewlett-Packard Company
will, at its option, either repair or replace products which prove to be
defective
.
For warranty service or repair, this product must be returned to a
service facility designated by Hewlett-P
ackard. Buyer shall prepay
shipping charges to Hewlett-P
ackard and Hewlett-P
ackard shall pay
shipping charges to return the product to Buyer. However, Buyer shall
pay all shipping charges
,duties
,and taxes for products returned to
Hewlett-P
ackard from another country
.
Hewlett-Packard warrants that its software and rmware designated
by Hewlett-Packard for use with an instrument will execute
its programming instructions when properly installed on that
instrument. Hewlett-Packard does not warrant that the operation
of the instrument, or software, or rmware will be uninterrupted or
error-free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from
improper or inadequate maintenance by Buyer, Buyer-supplied
software or interfacing, unauthorized modication or misuse,
operation outside of the environmental specications for the
product, or improper site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED.
HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND
EXCLUSIVE REMEDIES. HEWLETT-PACKARD SHALL NOT BE
LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT,
TORT, OR ANY OTHER LEGAL THEORY.
iii

Assistance
Product maintenance agreements and other customer assistance
agreements are available for Hewlett-P
ackard products.For any
assistance
,contact your nearest Hewlett-Packard Sales and Service
Oce
.
Compliance
This instrument has been designed and tested in accordance with
IEC Publication 348, Safety Requirements for Electronic Measuring
Apparatus, and has been supplied in a safe condition. The instruction
documentation contains information and warnings which must be
followed by the user to ensure safe operation and to maintain the
instrument in a safe condition.
Safety Notes
The following safety notes are used throughout this manual.
Familiarize yourself with each of the notes and its meaning before
operating this instrument.
WARNING
Warning denotes a hazard. It calls attention to a procedure
which, if not correctly performed or adhered to, could result in
injury or loss of life.Do not proceed beyond a warning note until
the indicated conditions are fully understood and met.
CA
UTION
Caution denotes ahazard. It calls attention to a procedure that, if
not correctly performed or adhered to, would result in damage to or
destruction of the instrument. Do not proceed beyond a caution sign
until the indicated conditions are fully understood and met.
iv

General Safety Considerations
WARNING
No operator serviceable parts inside. Refer servicing to
qualied personnel. To prevent electrical shock, do not remove
covers.
If this instrument is not used as specied, the protection
provided by the equipment may be impaired. This instrument
must be used in a normal condition (in which all means for
protection are intact) only.
For continued protection against re hazard, replace line fuse
only with same type and rating ([F 5A/250V]). The use of other
fuses or material is prohibited.
CAUTION
Before switching on this instrument, make sure that the line voltage
selector switch is set to the voltage of the power supply and the
correct fuse is installed.
Always use the three-prong ac power cord supplied with this
instrument. Failure to ensure adequate earth grounding by not
using this cord may cause instrument damage.
Only clean the instrument cabinet using adamp cloth.
L
The instruction documentation symbol. The product is
marked with this symbol when it is necessary for the
user to refer to the instructions in the documentation.
CE The CE mark is a registered trademark of the European
Community
.(If accompanied by a year, it is when the
design was proven.)
ISM1-A This is asymbol of an Industrial Scientic and Medical
Group 1 Class A product.
CSA The CSA mark is a registered trademark of the Canadian
Standards Association.
Manual Conventions
4
Front-Panel Key
5 This represents a key physically located on the
instrument.
NNNNNNNNNNNNNNNNNNNNNNN
Softkey This indicates a \softkey," a key whose label is
determined by the rmware of the instrument.
Screen Text This indicates text displayed on the instrument's
screen.
v

Contents
1. Product Description
Measurement Overview . . . . . . . . . . . . . . . 1-2
2. Specications and Characteristics
Denition of Terms. . .. .. .. .. .. .. .. .. 2-1
HP 8564E Spectrum Analyzer Specications and
Characteristics .... .. .. .. .. .. .. . 2-2
Antenna Specications and Characteristics . . . . . . 2-3
Typical Sensitivity for an HP 84125C System . . . . . . 2-5
Amplitude Accuracy ................. 2-6
Declaration of Conformity .............. 2-8
3. System Setup and Functional Tests
System Setup ..................... 3-1
Initial Inspection .... .. .. .. .. .. .. .. 3-1
T
est Set Components ................ 3-2
Installing the HP 84125C System . . . . . . . . . . . 3-4
Assembling the Test Mobile Instrument Cart .. .. 3-4
Installing the Spectrum Analyzer ......... 3-4
Attaching the Power Module and Power Cords ... 3-6
Installing the Accessories and Test Set in the System 3-6
Connecting the RF Cable Assembly to the Spectrum
Analyzer .......... .. .. .. .. . 3-7
Connecting the DC Ampliers to the RF Cable
Assembly................... 3-9
System Functional Tests................ 3-10
Test Set Verication Description . . . . . . . . . . . 3-10
Procedure ..................... 3-12
Displayed Average Noise Level (DANL) Description . . 3-15
Part1,1to18GHz................ 3-15
Part 2, 18 to 40 GHz .... .. .. .. .. .. . 3-16
Equipment Required ................ 3-16
Procedure ..................... 3-17
Part1:1to18GHz. .. .. .. .. .. .. .. . 3-17
Part 2: 18 to 40 GHz .... .. .. .. .. .. . 3-19
4. Test Set Hardware Congurations
1 to 18 GHz Conguration . . . . . . . . . . . . . . 4-1
18 to 26.5 GHz Conguration ............ 4-4
26.5 to 40 GHz Conguration ............ 4-6
Cable and Connector Care . . . . . . . . . . . . . . . 4-7
Connection Procedure .... .. .. .. . .. .. 4-7
Disconnection Procedure .... .. .. .. .. .. 4-8
Handling and Storage . . . . . . . . . . . . . . . . . 4-8
Contents-1

5. System Interface
DLP Softkey Menu .................. 5-2
HP 84125C System Softkey Reference ......... 5-3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1GHz to 18GHz ... .. . .. .. .. .. .. . 5-3
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
1.5GHz to 18GHz ................ 5-4
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
3.5GHz to 18GHz ................ 5-4
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
8.25GHz to 18GHz ................ 5-4
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
18GHz to 26.5 GHz
............... 5-5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
26.5 GHz to 40GHz
............... 5-5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Add to Mkr List
................ 5-5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
ADJUST LIMIT .... .. . .. .. .. .. .. . 5-6
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
CLEAR MKR LIST ... .. . .. .. .. .. .. . 5-6
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
COPY DISPLAY .... .. . .. .. .. .. .. . 5-6
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
HIGHEST PEAK .... .. . .. .. .. .. .. . 5-6
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
HP84125C Config ................ 5-6
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LIM LINE ON OFF
.... . .. .. .. .. .. . 5-7
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MARKER dB

V/m
................ . 5-7
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MAX HOLD ON OFF
......... .. .. .. . 5-8
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
MKR LIM ON OFF
... .. . .. .. .. .. .. . 5-8
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT PEAK .... .. .. . .. .. .. .. .. . 5-8
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT LT PEAK .... .. . .. .. .. .. .. . 5-9
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
NEXT RT PEAK
.................. 5-9
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PRINT DISPLAY
................. 5-9
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PRINT MKR LIST ... .. . .. .. .. .. .. . 5-9
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SAVE MKR #1 - #9 ................ 5-10
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT LINEAR ... .. . .. .. .. .. .. . 5-10
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
SELECT LOG
..... .. . .. .. .. .. .. . 5-10
NNNNNNNNNNNNNNNNNNNNNNNNNN
SERVICE ... .. .. .. . .. .. .. .. .. . 5-11
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TIMEDATE ON OFF ................ 5-11
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
VIEW MKR LIST ... .. . .. .. .. .. .. . 5-11
6. Making Measurements
Conguring the T
estSet............... 6-2
Setting Up the HP 8564E Spectrum Analyzer . . . . . 6-3
Making the Measurement Using P
eak Detection . . . . 6-3
Making a Measurement Using Average Detection ... 6-4
Contents-2

7. Using the HP 84125C Utility
Personal Computer Requirements .. .. .. .. .. . 7-2
Minimum PC Requirements ............. 7-2
Setting Up the HP-IB or GPIB Interface ...... .. 7-2
Setting Up HP-IB Interface for Windows 3.1 .... . 7-2
Hardware Installation . . . . . . . . . . . . . . . 7-2
Software Installation ............... 7-3
Setting Up HP-IB Interface for Windows 95 .... . 7-3
Hardware Installation . . . . . . . . . . . . . . . 7-3
Software Installation ............... 7-3
Hardware Verication . . . . . . . . . . . . . . . 7-4
Setting Up HP-IB Interface for Windows NT 4.0 ... 7-4
Hardware Installation (HP 82341C) ........ 7-4
Software Installation ............... 7-4
Hardware Verication (HP 82341C) ........ 7-5
Setting Up AT-GPIB for Windows 3.1 .. .. .. .. 7-5
Hardware Setup and Installation . . . . . . . . . . 7-5
Software Installation ....... .. .. .. .. 7-6
Software Setup . . . . . . . . . . . . . . . . . . 7-6
Hardware Verication . . . . . . . . . . . . . . . 7-6
Setting Up AT-GPIB/TNT for Windows 95 .. .. .. 7-7
Software Installation ............... 7-7
Hardware Conguration .............. 7-7
Hardware Installation ............... 7-8
Hardware V
erication .............. . 7-8
Setting Up A
T-GPIB/TNT for Windows NT 4.0 ....7-8
Software Installation ............... 7-8
Hardware Setup and Installation .......... 7-8
Software Setup .................. 7-9
Hardware V
erication A
T-GPIB/TNT . . . . . . . . 7-9
Installing the HP 84125C Download Utility on Your
P
ersonal Computer .... .. .. .. .. .. .. 7-10
Downloading the DLP into the Analyzer . . . . . . . 7-10
File Menu .. .. .. .. .. .. .. .. .. .. .. 7-10
Print Factors.................... 7-10
Exit .... .. .. .. .. .. .. .. .. .. .. 7-10
Edit Menu ...................... 7-11
Antenna Factors . .. .. .. . .. .. .. .. .. 7-11
Antenna Correction Factors Window . . . . . . . . . 7-11
Antenna Data Area . . . . . . . . . . . . . . . . 7-11
Edit Area ............. . .. .. .. 7-11
Enter P
oint Button . . . . . . . . . . . . . . . . 7-11
Del P
oint Button ................. 7-11
Add P
oint Button . . . . . . . . . . . . . . . . . 7-12
Save Button .. .. .. . .. .. .. .. .. .. 7-12
Exit Button .... .. .. .. .. .. .. .. . 7-12
GPIB Conguration Window . . . . . . . . . . . . . 7-12
GPIB Interface Card Selection Area ........ 7-12
National GPIB/HPIB AddressArea......... 7-12
Done Button . . . . . . . . . . . . . . . . . . . 7-13
Contents-3

8. Customer Support
If You Have a Problem .. .. .. .. .. .. .. .. 8-1
Calibration Information . . . . . . . . . . . . . . . . 8-2
Replaceable Parts................... 8-2
Returning the HP 84125C System for Calibration or
Service .... .. .. .. .. .. .. .. .. . 8-3
Packaging the HP 84125C System for Shipment . . . . 8-3
Hewlett-Packard Sales and Service Oces ...... 8-4
A. Amplitude Accuracy
Spectrum Analyzer Uncertainties .......... A-1
HP 84125C T
est-Set Uncertainties .......... A-2
Index
Contents-4

Figures
2-1. HP 84125C System Dimensions .... .. .. .. . 2-4
2-2. Typical Sensitivity from 1 to 18 GHz . . . . . . . . . 2-5
2-3. Typical Sensitivity from 18 to 26.5 GHz ....... 2-5
2-4. Typical Sensitivity from 26.5 to 40 GHz ....... 2-6
2-5. Declaration of Conformity .... .. .. .. .. . 2-8
3-1. Spectrum Analyzer Installation .. .. .. . .. .. 3-5
3-2. Front view of the Spectrum Analyzer .... .. .. 3-7
3-3. Strain Relief Installation .............. 3-8
3-4. DC Ampliers Cable Routing .. .. .. .. .. .. 3-9
3-5. Reference Point Setup ............... 3-13
3-6. System Gain Verication .... .. .. .. .. .. 3-14
3-7. D
ANL Measurement Setup
,1to 18 GHz ....... 3-17
3-8. D
ANL Measurement Setup
,18 to 40 GHz . . . . . . . 3-19
4-1. T
est Set Diagram .................. 4-1
4-2. 1to 18 GHz T
est-Set Conguration (top view) .... 4-2
4-3. 18 to 26.5 GHz T
est-Set Conguration (side view) . . . 4-4
4-4. 26.5 to 40 GHz Test-Set Conguration (side view) . . . 4-6
5-1. DLP softkey menu ................. 5-2
8-1. Component Location Diagram . . . . . . . . . . . . 8-3
T
ables
3-1. HP 84125C System Accessories ........... 3-2
3-2. Recommended Test Equipment and Accessories . . . . 3-11
3-3. Hardware Congurations .... .. .. .. .. . . 3-11
3-4. Correction Data Files . . . . . . . . . . . . . . . . 3-12
3-5. Test Set Verication . . . . . . . . . . . . . . . . . 3-15
3-6. Recommended Test Equipment and Accessories . . . . 3-16
3-7. Displayed A
verage Noise Level ........... 3-21
8-1. Replaceable Parts.. .. .. .. .. .. .. .. .. 8-2
8-2. HP Sales and Service Oces . . . . . . . . . . . . . 8-5
A-1. HP 84125C System Uncertainties .......... A-4
Contents-5

1
Product Description
The HP 84125C microwave EMI measurement test system is designed
to measure the radiated energy from an unintentional or intentional
radiator such as a transmitter or transceiver. It provides a system
level solution to make measurements above 1 GHz. The HP 84125C
system is designed to test products for EMI compliance to current FCC
regulations governing emissions and measuring to current ETSI and
CISPR regulations in the same frequency band.
The system is integrated into a portable instrument cart for easy
transport to and from the test location. There are two major
components of the system: a hand-held, tripod-mountable or antenna
mast-mountable test set and the spectrum analyzer mounted on an
instrument cart. The test set contains two low noise ampliers,
high-pass lters, antenna, and interconnecting cables. A three-meter
RF cable assembly connects the test set to the spectrum analyzer
and allows the test set to be moved around without moving the
instrument cart. The RF cable assembly contains a rugged, low loss,
high frequency cable and two DC power cables for the ampliers
.
Each system is calibrated by Hewlett-P
ackard before shipment. The
calibration data consists of amplier gain, cable loss
,lter response
,
and antenna factors
.The data is then stored into data correction
tables which are loaded into the spectrum analyzer memory for easy
recall during each measurement band.
The calibration data is also stored on a 3.5 inch oppy disk during
factory calibration of the HP 84125C system and is shipped with each
HP 84125C system. The oppy disk contains the amplitude correction
factors for the test set (that is, amplier gain, cable loss, and lter
response) and the antenna. In addition, the disk also contains a
MS-Windows utility that allows you to restore calibration data and
modify antenna data if needed.
To combine the functionality of the HP 8564E spectrum analyzer and
the test set, a downloadable program (DLP) has been provided. The
DLP provides the system softkeys that set the parameters for making
an EMI measurement. Hardware congurations can be selected
enabling you to test the harmonic frequencies of your equipment
under test (EUT) while ltering out the fundamental frequencies
.
The DLP uses correction data to account for gain n losses due to the
antenna, cables, ampliers, and lters.
Product Description 1-1

Measurement Overview
The HP 84125C microwave EMI measurement test system may be used
for a variety of measurements.To assure the best, most accurate
measurements of your product, you should read and review the
required product regulations. The following is a brief description of
how to use the system to test a product to the FCC Part 15 regulation.
Adetailed measurement example for measuring an intentional
radiator has been provided in Chapter 6.
Current FCC regulations specify that harmonic emissions measured
above 1GHz on wireless transmitters should be below 54 dB
 V/m
using average detection at adistance of 3 meters. At higher
frequencies
,cable loss and antenna factors bring the inherent system
noise level close to the regulatory limit. To improve the signal-to-noise
ratio
, the FCC allows positioning the measuring antenna at a distance
closer than 3 meters. The correction to be applied is described in FCC,
P
art 15.31 (f)(1) which states:
\At frequencies equal to or above 30 MHz, measurements may be
performed at a distance other than what is specied provided:
measurements are not made in the near eld; and, it can be
demonstrated that the signal levels needed to be measured at the
distance employed can be detected by the measuring equipment.
Measurements shall not be performed at a distance greater than 30
meters unless it can be further demonstrated that measurements at
a distance of 30 meters or less are impractical. When performing
measurements at a distance other than what is specied, the results
shall be extrapolated to the specied distance using an inverse
linear distance extrapolation factor (20 dB/decade)."
This would translate to measuring to alimit of approximately
64 dB  V/m at a distance of 1 meter. Therefore, we recommend
that you rst make a measurement at a distance of 1 meter to
the 64 dB  V/m limit line with peak detection. Using a 1 meter
measurement will improve the signal-to-noise ratio making it easier
to detect emissions
.Signals with a peak value above the 64 dB
 V/m
limit line will need to be remeasured using average detection.
1-2 Product Description

2
Specications and Characteristics
This chapter contains specications, characteristics, and typical
performance for the HP 84125C system.
Denition of Terms
Specications describe warranted performance which is traceable
to the National Bureau of Standards (NIST).
Characteristics describe non-warranted performance derived
during the design phase of the system and is not veried on a
continuing basis
.
Typical P
erformance
is non-warranted, but indicates performance
which most units will exhibit.
Frequency Range
HP 84125C 1to40GHz
Spectrum Analyzer Displayed A
verage Noise Level
(Measured at test-set input with 1 MHz RBW)
1
Specication Typical
1to18GHz 6dB  V 0 3dB  V
18 to 26.5 GHz 6dB  V 0 3dB  V
26.5 to 40 GHz 9dB

V0dB

V
1 For use with the through cable or the correct high-pass lter for the selected frequency range
Limit to Noise Ratio / Sensitivity (Characteristic)
> 6 dB (at 64 dB  V/m)
Specications and Characteristics 2-1

Test Set
(Includes ampliers, lter, and RF cable assembly.)
Calibration Data Uncertainty 6 0.9 dB
Flatness Uncertainty
(Characteristic)
6 1.7 dB
Test-Set Repeatability
(Characteristic)
1
6 0.7 dB
Maximum Temperature Drift
(Characteristic)
2
6 1.5 dB
Input VSWR
(Characteristic)
1 to 18 GHz
18 to 40 GHz
3.2 to 1.0
2.3 to 1.0
1 Includes cable exure, amplier aging, and connection repeatability.
2
The system is specied between 20

Cand 30

C.
Test-Set Filter Rejection (typical)
Frequency Range P
assband 60 dB Rejection P assband VSWR
1to 18 GHz 1.5 to 18 GHz

0.95 GHz 2.1:1
1 to 18 GHz 3.5 to 18 GHz  2.5 GHz 2.1:1
1to 18 GHz 8.25 to 18 GHz

5.9 GHz 2.3:1
HP 8564E Spectrum Analyzer Specications and Characteristics
T
oguarantee the performance of the HP 84125C system, the
HP 8564E spectrum analyzer must be operated under the following
conditions:
Five-minute warmup in ambient conditions
A
uto-coupled controls
Digital trace display
IF ADJ ON
REF LVL CAL adjusted
1ST LO OUTPUT terminated in 50 ohms
Two-year calibration cycle
Environmental requirements met
Note
REF L
VL CAL uses the CAL OUTPUT signal to calibrate the reference
level. Internal temperature changes determine how often this
adjustment should be performed. Amplitude temperature drift is a
nominal 1 dB/10

C. The nominal temperature variation within the
instrument is 10

C, most of which occurs during the rst 30 minutes
after power-on. Internal temperature equilibrium is reached after
2 hours of operation at a stable ambient temperature.
2-2 Specications and Characteristics

HP 8564E Spectrum Analyzer
A
dditional instrument specications are described in
HP 8560 E-Series Calibration Guide .
Antenna Specications and Characteristics
Antenna F
actor A
ccuracy
1to 18 GHz HP 11966E
6
2dB
18 to 26.5 GHz HP part number
84125-80008
6
0.5 dB
26.5 to 40 GHz HP part number
84125-80001
6 0.5 dB
VSWR (characteristic)
1 to 18 GHz (HP 11966E) 2.8 to 1.0
18 to 26.5 GHz (p/n 84125-80008) 1.4 to 1.0
26.5 to 40 GHz (p/n 84125-80001) 1.4 to 1.0
Third Order Intercept (characteristic)
> 50 dB  V
Weight
T
est Set
1
10.75 lb
.
2
23.7 kg
HP 84125C System
3
150 lb
.330.8 kg
1 The weight includes the 1 to 18 GHz antenna horn.
2
For an HP 84125C, with either the 18 to 26.5 GHz antenna horn or the 26.5 to 40 GHz antenna horn installed, the test-set weight
is 7.5 lb or 16.5 kg.
3 Includes spectrum analyzer, instrument cart, and test set.
Specications and Characteristics 2-3

Figure 2-1. HP 84125C System Dimensions
2-4 Specications and Characteristics

Typical Sensitivity for an HP 84125C System
Note
The values displayed by the HP 84125C system are the actual eld
strength of the emission (in dB  V/m), corrected for all system gains
and losses including the antenna transducer factors.
Figure 2-2. Typical Sensitivity from 1 to 18 GHz
Figure 2-3. Typical Sensitivity from 18 to 26.5 GHz
Specications and Characteristics 2-5