Keysight Technologies E8257D User manual

Notice: This document contains references to Agilent.
Please note that Agilent’s Test and Measurement business
has become Keysight Technologies. For more information,
go to www.keysight.com.
Keysight Technologies
E8257D Option H30

User’s Guide

Notices
© Keysight Technologies, Inc.
2003-2014
No part of this manual may be
reproduced in any form or by any
means (including electronic storage
and retrieval or translation into a
foreign language) without prior
agreement and written consent from
Keysight Technologies, Inc. as
governed by United States and
international copyright laws.
Manual Part Number
E8251-90072
Print Date
December 2014
Supersede November 2006
Published in USA
Keysight Technologies Inc.
1400 Fountaingrove Parkway
Santa Rosa, CA 95403
Where to Find the Latest
Information
Documentation is updated
periodically. For the latest information
about these products, including
instrument software upgrades,
application information, and product
information, browse to the following
URL, search for the name of your
product:
http://www.keysight.com/find
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performance of a U.S. Government
prime contract or subcontract,
Software is delivered and licensed as
“Commercial computer software” as
defined in DFAR 252.227-7014 (June
1995), or as a “commercial item” as
defined in FAR 2.101(a) or as
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or any equivalent agency regulation or
contract clause. Use, duplication or
disclosure of Software is subject to
Keysight Technologies’ standard
commercial license terms, and
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Warranty
THE MATERIAL CONTAINED IN THIS
DOCUMENT IS PROVIDED “AS IS,” AND IS
SUBJECT TO BEING CHANGED, WITHOUT
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DOCUMENT THAT CONFLICT WITH THESE
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SEPARATE AGREEMENT WILL CONTROL.
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Safety Notices
CAUTION
A CAUTION notice denotes a hazard. It
calls attention to an operating
procedure, practice, or the like that, if
not correctly performed or adhered to,
could result in damage to the product
or loss of important data. Do not
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until the indicated conditions are fully
understood and met.
WARNING
A WARNING notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that, if
not correctly performed or adhered to,
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Table of Contents
Contents-1
E8257D Option H30
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Nominal Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operation and Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Documentation Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Option H30 Operation (520 or 540) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
MID Board or Coaxial Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Upconverter Mixer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Safety and Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Safety Earth Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Statement of Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Before Applying Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Connector Care and Cleaning Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Instrument Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Electrical Safety Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
EMI and EMC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Keysight Support, Services, and Assistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Service and Support Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Contacting Keysight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Shipping Your Product to Keysight for Service or Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Contents-2
Table of Contents

User’s Guide E8251-90072 1
E8257D Option H30

2User’s Guide E8251-90072
E8257D Option H30 Description
Description
The E8257D Option H30 adds a mixer and coax switch to enable the E8257D to upconvert the
RF signal (input is provided on the rear panel) to a higher frequency which will be the sum and
difference of the RF input signal and frequency set on the E8257D.
The coaxial switch allows the E8257D with Option H30 to be switched from standard
synthesizer mode to upconverter mode. This allows the instrument to be used as a standard
source instrument, as well as an upconverter. The synthesizer and upconverter modes can be
selected on the front panel or by remote command. The upconverted output signal is the same
as the front panel RF output. The input connector is a SMA type female that is located on the
rear panel.
The Option H30 can be ordered with Option 520 or Option 540. For instruments that include
Option 520, signals can be upconverted from 200 kHz to 26 GHz. For instruments that include
Option 540, signals can be upconverted from 6 to 46 GHz.

User’s Guide E8251-90072 3
E8257D Option H30 Nominal Performance Characteristics
Nominal Performance Characteristics
Nominal values indicate expected performance or describe product performance that is useful
in the application of the product, but is not covered by the product warranty.
NOTE When in upconverter mode, the displayed RF output power level is LO drive. The
displayed RF power in upconverter mode does not represent the power of the
upconverted signal at the RF output.
The maximum RF power output of Option H30 is reduced by 2 dBm due to the added insertion
loss of the coax transfer switch required for the design. For units with Option H30, subtract
2 dBm from the power output specifications listed in Table 1 of the standard user’s guides
E8251-90253 and E8251-90353.
Table 1 Option H30 with Option 520 (20 GHz)
Description Frequency
Rear panel frequency range 100 kHz to 6 GHz
Conversion loss for upconverted signal to
the front panel
–10 to –15 dBm
Front panel RF upconverted frequency
range
200 kHz to 26 GHz
Usable IF Bandwidth (dependent on the 
IF frequency used on rear panel)
< 2 dB over 1 GHz span 3 GHz IF Frequency

< 20 dB over 1 GHz span > 3 GHz IF Frequency
Table 2 Option H30 with Option 540 (40 GHz)
Description Frequency
Rear panel frequency range 100 kHz to 6 GHz
Conversion loss for upconverted signal to
the front panel
–10 dB (6 GHz) to –28 dB (46 GHz)
Front panel RF upconverted frequency
range
6 to 46 GHz
Usable IF Bandwidth (depends on the 
IF frequency used on rear panel)1
1. Conversion loss and IF bandwidth flatness will degrade contingent on the IF Input frequency and
the upconverted frequency. Refer to Figure 1 and Figure 2.
< 2 dB over 1 GHz span 3 GHz IF Frequency

< 20 dB over 1 GHz span > 3 GHz IF Frequency

4User’s Guide E8251-90072
E8257D Option H30 Nominal Performance Characteristics
Figure 1 Upconverted RF Flatness
Figure 2 Upconverted RF Conversion Loss
0
5
10
15
20
0
0.4
0.8
1
1.4
1.6
2
2.4
2.6
3
3.2
3.6
3.8
4
4.4
4.8
5
5.2
5.6
5.8
6
IF Input frequency
vs. flatness over
1 GHz (dB) for
fundimental
mixing
5
10
15
20
25
30
35
40
45
50
3 6 9 12151821242730333639414446
Conversion Loss
from IF input
power level (dB)
for fundimental
mixing

User’s Guide E8251-90072 5
E8257D Option H30 Operation and Performance Verification
Operation and Performance Verification
Documentation Conventions
The following key conventions are used throughout this document.
•[HARDKEYS] are labeled front panel keys.
•SOFTKEYS are unlabeled keys whose function is indicated on the instrument display.
Option H30 Operation (520 or 540)
To use Option H30 as a standard instrument, refer to the standard User’s Guide.
To use Option H30 as an RF upconverter, refer to the following procedure:
CAUTION Maximum power into the rear panel RF upconverter input must not exceed 
+20 dBm.
CAUTION Damage to upconverter mixer can result if the reverse power into the RF output
port on the front panel occurs while in upconverter mode.
NOTE Refer to “Nominal Performance Characteristics” on page 3 for performance
considerations.
Step 1. Remove the protective connector from the RF up converter Input on the rear panel.
Step 2. Set the RF source (customer supplied) to within the recommended power and
frequency ranges.
Step 3. Connect the RF source to the H30 rear panel RF upconverter input using a suitable RF
cable and adapters as necessary. It is recommended that the user set the power level
of Option H30 to +10 dBm for best performance.
To activate upconverter mode from the front panel, press:

[FREQUENCY] > MORE, MORE > UPC ON/OFF (to activate mode)

Use the same front panel key to return the instrument to normal synthesizer mode.

The command UPC ON can be used to remotely select the upconverter mode. Use the
command UPC OFF to return the instrument to normal synthesizer mode.

6User’s Guide E8251-90072
E8257D Option H30 Operation and Performance Verification
Performance Verification
The Keysight E8257D Option H30 functionality can be verified using the following equipment
and methods:
Option H30 must first meet standard product specifications with the exception that the power
output may be degraded by up to 2.0 dBm. (Subtract 2.0 dBm from the Option 1E1 output
power specification).
Refer to the Table 3 on page 6 for a list of equipment needed in addition to Option H30 being
tested:
Step 1. Set the RF Source power level to –10 dBm and frequency to 6 GHz.
Step 2. Connect the RF Source to the E8257D Option H30 rear panel RF Upconverter Input,
using an RF cable and adapters.

Press: [FREQUENCY] > MORE, MORE > UPC ON/OFF (to activate mode)
An audible click should be heard from the E8257D Option H30 as the transfer switch
switches the upconverter mixer LO to the coupler output and the mixer RF out to the
1E1 step attenuator’s input.
Step 3. For instruments with Option 540 set the instrument to upconverter mode, set power
level to +8 dBm and CW frequency to 40 GHz. Verify that a 46 GHz signal appears on
the spectrum analyzer when in upconverter mode and is not present when
in standard synthesizer mode. The level of the upconverter IF signal 
(6 GHz + 40 GHz = 46 GHz) is nominally –28 dBm.

or 

For instruments with Option 520 set the instrument to the upconverter mode, set
power level to +8 dBm and CW frequency to 20 GHz. Verify on the spectrum analyzer
that a 26 GHz signal appears when in upconverter mode and is not present when
in standard synthesizer mode. The level of the upconverter IF signal (6 GHz + 20 GHz
= 26 GHz) is nominally –28 dBm. Since this is a functional test only, measurement
uncertainty is not taken into account. This verifies the switch path and mixer are
functioning.
Table 3 Equipment Required
Keysight Instrument Keysight
Part Number
50 GHz Spectrum Analyzer 8565EC or equivalent
6 GHz RF Signal Source E4438C or equivalent
RF Cable (SMA male, 3 ft) 5061-6669
RF Cable (2.4 mm, 3 ft) 5063-9820
SMA Female to Type-N Adapter 1250-1250
2.4 mm to 2.4 mm Female Adapter 11900B (or comparable)

User’s Guide E8251-90072 7
E8257D Option H30 Troubleshooting
Troubleshooting
If there is no signal a problem has occurred. First check the equipment setup, verifying outputs
on the sources and connections. Refer to Figure 4 through Figure 7 .
Verify that the E8257D Option H30 Upconverter switch is working:
MID Board or Coaxial Switch
The following procedure will aid in determining whether the MID board or the coax switch
(87222E) is functional.
Step 1. Select upconverter mode on/off, then listen for the coax switch to click. If it doesn’t
click, check the ribbon cable connection to the switch (under switch/mixer assembly).
Remove the switch end of the cable from the switch and verify: 

pin 1 for +32 Vdc, 
pin 7 for +5 Vdc or 0 Vdc 
pin 8 for +5.2 Vdc 
pin 9 for Ground

If the voltages are incorrect, verify the ribbon cable connection to the MID board
assembly. The ribbon cable should be connected to J14.
Step 2. Cycle the upconverter mode on/off repeatedly while looking at pin 7 voltage. Pin 7
should toggle from +5 Vdc (upconverter mode on) to 0 Vdc (upconverter mode off). If
pin 7 voltage does not toggle, either the MID board or a configuration error is at fault.
Consult with Keysight Service for repair. Refer to “Keysight Support, Services, and
Assistance” on page 17.
Step 3. If the voltages and control signal are present at the ribbon cable as verified in step 1,
reconnect the ribbon cable to the coax switch and select upconverter mode and toggle
it ON/OFF. 
To verify the switch is not ultra quiet, measure the ports on the coax switch while
toggling the upconverter mode. 

(Coupler out) PORT 1 PORT 2 (mixer LO input)
(Atten. input) PORT 4 PORT 3 (mixer RF output)

Port 4 should connect to port 3 in upconverter On mode and port 1 in upconverter Off
mode. If it doesn’t, replace the 87222E coax switch.

8User’s Guide E8251-90072
E8257D Option H30 Troubleshooting
Upconverter Mixer
The following procedure will aid in determining if the upconverter mixer is functional:
CAUTION Possible damage may occur if RF upconverter input levels exceed 20 dBm or if
reverse power is applied at the RF output connector. First verify all cable
configurations are correct before applying a signal to the instrument.
The RF step attenuator cable to the coax switch is functional if the instrument
operates as a standard synthesizer.
The RF cable from the coupler output is also functional if the instrument operates as
a standard synthesizer.
Step 1. Verify that the RF cable is connected from the connector labeled RF upconverter on
the rear panel to the mixer’s IF input port. Verify the power at the connection to the
mixer with RF Source applied.
Step 2. Verify the power through the cables to LO Input of the mixer (bottom connector). The
power should be close to the power level coming from the Coupler Output. Replace
the cables if power insertion loss is excessive and damage is suspected. These
cables have a K-type connector and a 2.92 mm adapter should be used for mating to
connectors.
Step 3. If all of the cables have been verified and are functional, verify the mixer orientation
with the markings on the outside of the mixer LO down, RF Connector up and IF
Connector facing rear of instrument. Replace the mixer and verify its functionality by
following the verification procedure.

User’s Guide E8251-90072 9
E8257D Option H30 Troubleshooting
Repair Information
Figure 4 Top View
Figure 5 Semi-rigid Cables (front view)
W102 W104 W101 A9 MID Board W103
W105
W105 SW1 W104 W101
W103
A100 Mixer
MP101
W102

10 User’s Guide E8251-90072
E8257D Option H30 Troubleshooting
Figure 6 Ribbon Cable
Figure 7 Bracket (rear panel)
A100
MP101
W106
A9
MP107
MP108Nut
Washer

User’s Guide E8251-90072 11
E8257D Option H30 Replaceable Parts
Replaceable Parts
Reference
Designator Description Keysight Part Number Qty
A100 Mixer 6 GHz to 46 GHz (Opt H30 with Opt 540) 0955-1447 1
A100 Mixer 6 GHz to 26 GHz (Opt H30 with Opt 520) 0955-0488 1
SW1 Coax transfer switch, 4 port, 50 W, 50 GHz 87222-60030 1
W101 RF Cable Coupler- SW (Opt H30 with Opt 540) E8251-20082 1
W101 RF Cable Coupler- Switch (Opt H30 with Opt 520) E8251-20173 1
W102 RF Cable Attenuator - SW E8251-20083 1
W103 RF Cable Mixer IF - Rear Panel E8251-20084 1
W104 RF Cable Mixer LO - SW (Opt H30 with Opt 540) E8251-20085 1
W104 RF Cable Mixer LO - SW (Opt H30 with Opt 520) E8251-20172 1
W105 RF Cable Mixer R - SW (Opt H30 with Opt 540) E8251-20086 1
W105 RF Cable Mixer R - SW (Opt H30 with Opt 520) E8251-20171 1
W106 Ribbon Cable Conn. to Coax Switch 8120-6187 1

12 User’s Guide E8251-90072
E8257D Option H30 Safety and Information
Safety and Information
Introduction
Review this product and related documentation to familiarize yourself with safety markings and
instructions before you operate the instrument.
This product has been designed and tested in accordance with accepted industry standards,
and has been supplied in a safe condition. The documentation contains information and
warnings that must be followed by the user to ensure safe operation and to maintain the
product in a safe condition.
Safety Earth Ground
WARNING This is a Safety Class I Product (provided with a protective earthing ground
incorporated in the power cord). The mains plug shall only be inserted in a
socket outlet provided with a protective earth contact. Any interruption of the
protective conductor inside or outside of the product is likely to make the
product dangerous. Intentional interruption is prohibited.
CAUTION Always use the three prong AC power cord supplied with this product. Failure to
ensure adequate earth grounding by not using this cord may cause product
damage and the risk of electrical shock.
Declaration of Conformity
A copy of the Declaration of Conformity is available upon request, or a copy is available on the
Keysight Technologies web site at http://regulations.keysight.com/DoC/search.htm
Statement of Compliance
This product has been designed and tested in accordance with accepted industry standards,
and has been supplied in a safe condition. The documentation contains information and
warnings that must be followed by the user to ensure safe operation and to maintain the
product in a safe condition.

User’s Guide E8251-90072 13
E8257D Option H30 Safety and Information
Before Applying Power
Verify that the premises electrical supply is within the range of the instrument. The instrument
has an autoranging power supply.
WARNING If this product is not used as specified, the protection provided by the equipment
could be impaired. This product must be used in a normal condition (in which all
means for protection are intact) only.
CAUTION The Mains wiring and connectors shall be compatible with the connector used in
the premise electrical system. Failure, to ensure adequate earth grounding by not
using the correct components may cause product damage, and serious injury.
CAUTION Always use the three prong AC power cord supplied with this product. Failure to
ensure adequate earth grounding by not using this cord may cause product
damage and the risk of electrical shock.
CAUTION This product is designed for use in Installation Category II and Pollution Degree.
CAUTION Before switching on this instrument, make sure the supply voltage is in the
specified range.
CAUTION Verify that the premise electrical voltage supply is within the range specified on
the instrument.
CAUTION Ventilation Requirements: When installing the instrument in a cabinet, the
convection into and out of the instrument must not be restricted. The ambient
temperature (outside the cabinet) must be less than the maximum operating
temperature of the instrument by 4 °C for every 100 watts dissipated in the
cabinet. If the total power dissipated in the cabinet is greater than 800 watts,
forced convection must be used.

14 User’s Guide E8251-90072
E8257D Option H30 Safety and Information
WARNING For continued protection against fire hazard replace line fuse only with same
type and rating. The use of other fuses or material is prohibited.
WARNING These servicing instructions are for use by qualified personnel only. To avoid
electrical shock, do not perform any servicing unless you are qualified to do so.
WARNING The opening of covers or removal of parts is likely to expose the user to
dangerous voltages. Disconnect the instrument from all voltage sources before
opening.
WARNING No operator serviceable parts inside. Refer servicing to qualified personnel. To
prevent electrical shock, do not remove covers.
WARNING The detachable power cord is the instrument disconnecting device. It
disconnects the mains circuits from the mains supply before other parts of the
instrument. The front panel switch is only a standby switch and is not a LINE
switch (disconnecting device).
Connector Care and Cleaning Precautions
Remove the power cord to the instrument. To clean the connectors use alcohol in a well
ventilated area. Allow all residual alcohol moisture to evaporate, and fumes to dissipate prior to
energizing the instrument.
WARNING To prevent electrical shock, disconnect the E8257D Option H30 from mains
electrical supply before cleaning. Use a dry cloth or one slightly dampened with
water to clean the external case parts. Do not attempt to clean internally.
WARNING If flammable cleaning materials are used, the material shall not be stored, or left
open in the area of the equipment. Adequate ventilation shall be assured to
prevent the combustion of fumes, or vapors.

User’s Guide E8251-90072 15
E8257D Option H30 Regulatory Information
Regulatory Information
This section contains information that is required by various government regulatory agencies.
Instrument Markings
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.
The AC symbol indicates the required nature of the line module input power.
This symbol indicates separate collection for electrical and electronic equipment, mandated
under EU law as of August 13, 2005. All electric and electronic equipment are required to be
separated from normal waste for disposal (Reference WEEE Directive, 2002/96/EC).
This symbol indicates that the power line switch is ON.
This symbol indicates that the power line switch is in the STANDBY position.
This symbol indicates that the power line switch is in the OFF position.
This symbol is used to identify a terminal which is internally connected to the product frame
or chassis.
The CE mark is a registered trademark of the European Community. (If accompanied by a
year, it is when the design was proven.)
The CSA mark is a registered trademark of the CSA International.
This mark designates the product is an Industrial Scientific and Medical Group 1 Class A
product (reference CISPR 11, Clause 5)
This is a marking to indicate product compliance with the Canadian Interference-Causing
Equipment Standard (ICES-001).
Direct Current.
IP 2 0 The instrument has been designed to meet the requirements of IP 2 0 for egress and
operational environment.
The RCM mark is a registered trademark of the Australian Communications and Media
Authority
Indicates the time period during which no hazardous or toxic substance elements are
expected to leak or deteriorate during normal use. Forty years is the expected useful life of
the product.
This symbol on all primary and secondary packaging indicates compliance to China
standard GB 18455-2001.
South Korean Certification (KC) mark; includes the marking's identifier code which follows
the format: MSIP-REM-YYY-ZZZZZZZZZZZZZZ.
ICES/NMB-001

16 User’s Guide E8251-90072
E8257D Option H30 Regulatory Information
Electrical Safety Compliance
SAFETY
Complies with European Low Voltage Directive 2014/35/EU
• IEC/EN 61010-1:2010, 3rd Edition
• Canada: CSA C22.2 No. 61010-1-12
• USA: UL std no. 61010-1, 3rd Edition
• Acoustic statement (European Machinery Directive 2022/42/EC, 1.7.4.2U)
Accoustical noise emission
LpA<70 dB 
Operator position
Normal operation mode
Per ISO 7779
EMI and EMC Compliance
EMC
Complies with European EMC Directive 2014/30/EU
• IEC 61326-1:2012/EN 61326-1:2013
• CISPR Pub 11 Group 1, class A
• AS/NZS CISPR 11:2011
•ICES/NMB-001
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est conforme a la norme NMB du Canada.
• South Korean Class A EMC declaration: This equipment is Class A suitable for professional
use and is for use in electromagnetic environments outside of the home.
A 급 기기 ( 업무용 방송통신기자재 )이 기기는 업무용 (A 급 ) 전자파적합기기로서 판 매자 또는 사
용자는 이 점을 주 의하시기 바라 며 , 가정외의 지역에서 사용하는 것을 목적으 로 합니다 .