Page 1
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Keysight R347B and Q347B
Noise Sources
This manual applies directly to instruments with serial
numbers prefixed 2726A and above, and serial numbers
prefixed US and MY.
This manual applies directly to instruments with serial
numbers prefixed MY5823 and above, and serial numbers
prefixed US and MY.
Operating and
Service Manual
Page 2
Notices
CAUTION
WARNING
Copyright Notice
© Keysight Technologies 2007-2018
No part of this manual may be repro-
duced 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 as governed by United States and
international copyright laws.
Manual Part Number
00347-90013
Edition
Edition 3, August 1, 2018
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
Technology Licenses
The hardware and/or software
described in this document are furnished under a license and may be
used or copied only in accordance with
the terms of such license.
Declaration of Conformity
Declarations of Conformity for this
product and for other Keysight products may be downloaded from the
Web.
U.S. Government Rights
The Software is “commercial computer
software,” as defined by Federal Acquisition Regulation (“FAR”) 2.101. Pursuant to FAR 12.212 and 27.405-3 and
Department of Defense FAR Supplement (“DFARS”) 227.7202, the U.S.
government acquires commercial computer software under the same terms
by which the software is customarily
provided to the public. Accordingly,
Keysight provides the Software to U.S.
government customers under its standard commercial license, which is
embodied in its End User License
Agreement (EULA). The license set
forth in the EULA represents the
exclusive authority by which the U.S.
government may use, modify,
distribute, or disclose the Soft-ware.
The EULA and the license set forth
therein, does not require or per-mit,
among other things, that Keysight: (1)
Furnish technical information related to
commercial computer
commercial computer software
documentation that is not customarily
provided to the public; or (2) Relinquish
to,
or otherwise provide, the government rights in excess of these rights
customarily provided to the public to
use, modify, reproduce, release, per-form,
display, or
computer software
com-puter software documentation.
No additional government
requirements beyond those set forth in
the EULA shall apply, except to the
extent
licenses are explicitly required from all
providers of commercial computer
software pursu-ant to the FAR and the
DFARS and are set forth specifically in
writing
Keysight shall be under no obligation to
update, revise or otherwise modify the
Software. With respect to any
technical data as defined by FAR
2.101, pursuant to FAR 12.211 and
27.404.2 and DFARS 227.7102, the
U.S. government acquires no greater
than Limited Rights as defined in FAR
27.401 or DFAR 227.7103-5 (c), as
applicable in any technical data.
disclose commercial
that those terms, rights, or
else-where in the EULA.
soft-ware or
or commercial
Warranty
THE MATERIAL CONTAINED IN THIS
DOCUMENT IS PROVIDED “AS IS,”
AND IS SUBJECT TO BEING
CHANGED, WITHOUT NOTICE, IN
FUTURE EDITIONS. FURTHER, TO THE
MAXIMUM EXTENT PERMITTED BY
APPLICABLE LAW, KEYSIGHT DISCLAIMS ALL WARRANTIES, EITHER
EXPRESS OR IMPLIED, WITH REGARD
TO THIS MANUAL AND ANY INFORMATION CONTAINED HEREIN, INCLUDING BUT NOT LIMITED TO THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. KEYSIGHT
SHALL NOT BE LIABLE FOR ERRORS
OR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES IN CONNECTION
WITH THE FURNISHING, USE, OR
PERFORMANCE OF THIS DOCUMENT
OR OF ANY INFORMATION CONTAINED HEREIN. SHOULD KEYSIGHT
AND THE USER HAVE A SEPARATE
WRITTEN AGREEMENT WITH WARRANTY TERMS COVERING THE MATERIAL IN THIS DOCUMENT THAT
CONFLICT WITH THESE TERMS, THE
WARRANTY TERMS IN THE SEPARATE
AGREEMENT SHALL CONTROL.
Safety Information
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 proceed beyond a CAUTION notice until
the indicated conditions are fully
understood and met.
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,
could result in personal injury or death.
Do not proceed beyond a WARNING
notice until the indicated conditions are
fully understood and met.
2 Keysight R347B and Q347B Operating and Service Manual
Page 3
Environmental Conditions
The table below shows the general environmental requirements for this
instrument.
Environmental condition Requirement
Temperature
Humidity < 95% RH
Operating condition
– 0 °C to +55 °C
Keysight R347B and Q347B Operating and Service Manual 3
Page 4
Regulatory Information
MSIP-REM-Kst-
xxxxxxxxxxxxxx
The R347B and Q347B Noise Sources comply with the following Electromagnetic
Compatibility (EMC) compliances:
– IEC 61326-1/EN 61326-1
– Canada: ICES/NMB-001
– Australia/New Zealand: AS/NZS CISPR11
In order to preserve the EMC performance of the product, any cable which
becomes worn or damaged must be replaced with the same type and
specification.
Regulatory markings
The CE mark is a registered trademark of the
European Community. This CE mark shows that
the product complies with all the relevant
European Legal Directives.
ICES/NMB-001 indicates that this
ISM product complies with the
Canadian ICES-001.
Cet appareil ISM est conforme a la
norme NMB-001 du Canada.
ISM GRP.1 Class A indicates that this
is an Industrial Scientific and Medical
Group 1 Class A product.
4 Keysight R347B and Q347B Operating and Service Manual
The RCM mark is a registered trademark of the
Australian Communications and Media Authority.
This instrument is Class A suitable for professional
use and is for use in electromagnetic environments
outside of the home.
This symbol 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 instrument complies with the
WEEE Directive (2002/96/EC)
marking requirement. This affixed
product label indicates that you must
not discard this electrical or
electronic product in domestic
household waste.
Page 5
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/ 96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label indicates that you must not discard this
electrical or electronic product in domestic household waste.
Product category
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
Keysight R347B and Q347B Operating and Service Manual 5
Page 6
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
6 Keysight R347B and Q347B Operating and Service Manual
Page 7
Table of Contents
Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Regulatory markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/
EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Product category . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1Introduction
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
2Installation
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Mating Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
3 Specifications
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Supplemental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
4Operating Guide
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Operator’s check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Performance Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Repair and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Returning a Noise Source for Calibration . . . . . . . . . . . . . . . . . . . . . . .32
5 Using the ENR Data Diskette or CD
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Keysight R347B and Q347B Operating and Service Manual 7
Page 8
Loading ENR Data from Diskette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Retrieving ENR Data from CD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Saving the ENR Data to the Noise Figure Analyzer’s Internal
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Copying the ENR Data to the Noise Figure Analyzer’s Internal
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6 ENR File Format
Format Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Comment records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Header fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
ENR data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Example 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8 Keysight R347B and Q347B Operating and Service Manual
Page 9
List of Figures
Figure 1-1 Typical calibration labels . . . . . . . . . . . . . . . . . . . . . . .15
Figure 4-1 Operator’s check setup . . . . . . . . . . . . . . . . . . . . . . . .29
Figure 4-2 ENR measurement test setup . . . . . . . . . . . . . . . . . . .29
Figure 4-3 A typical example of the ENR value for R347B . . . . . . 30
Keysight R347B and Q347B Operating and Service Manual 9
Page 10
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
10 Keysight R347B and Q347B Operating and Service Manual
Page 11
List of Tables
Table 3-1 R347B and Q347B specifications . . . . . . . . . . . . . . . . .22
Table 3-2 R347B and Q347B supplemental characteristics . . . . 23
Table 3-3 Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . .26
Table 6-1 Mandatory header fields . . . . . . . . . . . . . . . . . . . . . . .43
Table 6-2 Optional header fields . . . . . . . . . . . . . . . . . . . . . . . . .43
Keysight R347B and Q347B Operating and Service Manual 11
Page 12
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
12 Keysight R347B and Q347B Operating and Service Manual
Page 13
Keysight R347B and Q347B Noise Sources
NOTE
Operating and Service Manual
1 Introduction
Product Overview 14
This chapter provides an overview of the Keysight R347B and Q347B Noise
Sources.
This manual contains operating and service information for both the R347B and
the Q347B noise sources. Unless otherwise specified, the information in this
manual applies to both noise sources.
13
Page 14
1Introduction
CAUTION
Product Overview
The Keysight R347B and Q347B noise sources produce noise output (power-on)
when +28 V is applied. When they are off, there is residual noise due to thermal
agitation in the noise sources (power-off). These two noise levels are used to
measure the gain and added noise of the device under test, and consequently, its
noise figure.
The Excess Noise Ratio (ENR) and the magnitude of the reflection coefficient
(Rho) in the ON state has been measured at major frequencies and recorded on a
label unique to each noise source. ENR references power-on noise power to the
noise power that exists at 290 K (17 °C). Sample noise source labels are provided
in Figure 1-1. The numbers on the sample labels in Figure 1-1 may differ from the
numbers on your noise source label because each noise source has been
individually tested. In addition, a separate calibration sheet showing the complex
reflection coefficient in both the ON and OFF states is included with each
instrument.
The noise source is provided with a BNC female connector for +28 V power input.
The waveguide output flange for the R347B is a type UG-599/U. The waveguide
output flange for the Q347B is a modified type UG-383/U.
Do not disassemble the noise source. The diode module is extremely static
sensitive and can be easily damaged or the calibration may be altered.
14 Keysight R347B and Q347B Operating and Service Manual
Page 15
Introduction 1
Figure 1-1 Typical calibration labels
Keysight R347B and Q347B Operating and Service Manual 15
Page 16
1Introduction
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
16 Keysight R347B and Q347B Operating and Service Manual
Page 17
Keysight R347B and Q347B Noise Sources
Operating and Service Manual
2 Installation
Initial Inspection 18
Mating Connectors 19
This chapter provides you important information on how to check and prepare
your instrument for operation.
17
Page 18
2Installation
CAUTION
Do not drop the noise sources. Dropping can damage the unit or alter the
calibration.
Initial Inspection
1 Unpack and inspect the shipping container and its contents throughly to
ensure that nothing was damaged during shipment. If the shipping container
or cushioning material is damaged, the contents should be checked both
mechanically and electrically.
– Check for mechanical damage such as scratches or dents.
– Procedures for checking electrical performance are given under “Operator’s
2 If the contents are damaged or defective, contact your nearest Keysight
Technologies Service and Support Office. Refer to “Sales and Technical
Support” on page 5 of this manual. Keysight Technologies will arrange for
repair or replacement of the damaged or defective equipment. Keep the
shipping materials for the carrier’s inspection.
3 If you are returning the instrument under warranty or for service, repackaging
the instrument requires original shipping containers and material or their
equivalents. Keysight Technologies can provide packaging materials identical
to the original materials. Refer to “Sales and Technical Support” on page 5 of
this manual for the Keysight Technologies nearest to you. Attach a tag
indicating the type of service required, return address, model number, and
serial number. Mark the container FRAGILE to insure careful handling. In any
correspondence, refer to the instrument by model number and serial number.
check” on page 28.
18 Keysight R347B and Q347B Operating and Service Manual
Page 19
Mating Connectors
The R347B noise source can connect to other instrumentation compatible with
waveguide flange type UG-599/U. The Q347B noise source can connect to other
instrumentation compatible with waveguide flange type UG-383/U. Both noise
sources will accept input via a BNC male connector complying with U.S. Military
Standard MIL-C-39012.
Installation 2
Keysight R347B and Q347B Operating and Service Manual 19
Page 20
2Installation
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
20 Keysight R347B and Q347B Operating and Service Manual
Page 21
Keysight R347B and Q347B Noise Sources
Operating and Service Manual
3 Specifications
General Specifications 22
This chapter provides the specifications of the R347B and Q347B noise sources.
21
Page 22
3 Specifications
General Specifications
Specifications
The specifications in Table 3- 1 are performance standards or limits against which
the noise sources may be tested.
Tab le 3-1 R347B and Q347B specifications
Specifications R347B Q347B
Frequency range 26.5 GHz to 40 GHz 33.0 GHz to 50 GHz
Operating temperature
–Range
– Variation
Connectors
– Input bias
–Output noise
Power requirements
– Noise ON
– Noise OFF
– Maximum reverse power
0 to 55 °C
< 0.009 dB/°C
BNC female
UG-599/U flange
28.0 V ± 1 V; 6.0 mA
0 V
100 mW
0 to 55 °C
< 0.009 dB/°C
BNC female
UG-383/U flange (modified)
28.0 V ± 1 V; 6.0 mA
0 V
100 mW
[a]
Maximum reflection coefficient (Rho) and
standing wave ratio (SWR)
– Source ON (0 to 55 °C)
– Source OFF (0 to 55 °C)
Excess noise ratio (ENR)
– 26.5 to 40 GHz
– 33 to 42 GHz
– 42 to 50 GHz
ENR uncertainties
– 26.5 to 40 GHz, 0 to 55 °C
– 33 to 42 GHz, 0 to 55 °C
– 42 to 50 GHz, 0 to 55 °C
[b]
[c]
[d]
Worst case (root sum of squares)
Rho (SWR)
0.13 (1.31)
0.17 (1.42)
14 dB to 17 dB
—
—
±0.7 dB (±0.4 dB)
—
—
Rho (SWR)
0.19 (1.46)
0.22 (1.57)
—
14 dB to 17 dB
9 dB to 16 dB
Worst case (root sum of squares)
—
±0.7 dB (±0.4 dB)
±0.8 dB (±0.5 dB)
22 Keysight R347B and Q347B Operating and Service Manual
Page 23
[a] Mates to standard UG-383/U
NOTE
[b] See Noise Source calibration label for RhoOn at cardinal frequencies
[c] See Noise Source calibration label for ENR at cardinal frequencies
[d] See Tabl e 3- 2 for typical ENR uncertainties at cardinal frequencies
Supplemental characteristics
The data listed in Table 3-2 are not specifications; that is they are not covered by
the certification and warranty at the beginning of this manual. They are typical or
nominal characteristics included as additional information.
Temperature ranges in Table 3-2 assume the following environments:
±
– 23
2 °C indicates typical room temperature operation, vibrationless, at less
than 60% humidity.
Specifications 3
– 0 to 55
°C indicates full temperature range operation with random vibration
at less than 95% humidity.
Table 3-2 R347B and Q347B supplemental characteristics
Characteristics R347B Q347B
Maximum reflection coefficient (Rho) and
standing wave ratio (SWR), 23 ± 2 °C
– Source ON (26.5 to 40 GHz)
– Source OFF (26.5 to 40 GHz)
– Source ON (33 to 42 GHz)
– Source OFF (33 to 42 GHz)
– Source ON (42 to 50 GHz)
– Source OFF (42 to 50 GHz)
Rho (SWR)
0.125 (1.29)
0.165 (1.40)
—
—
—
—
Rho (SWR)
—
—
0.177 (1.43)
0.210 (1.53)
0.130 (1.30)
0.170 (1.41)
Keysight R347B and Q347B Operating and Service Manual 23
Page 24
3 Specifications
Tab le 3-2 R347B and Q347B supplemental characteristics
Characteristics R347B Q347B
ENR uncertainties, 23 ± 2 °C
– 26.5 GHz
– 27 GHz
– 28 GHz
– 29 GHz
– 30 GHz
– 31 GHz
– 32 GHz
– 33 GHz
– 34 GHz
– 35 GHz
Worst case (root sum of squares)
0.31 dB (0.17 dB)
0.25 dB (0.12 dB)
0.27 dB (0.14 dB)
0.32 dB (0.18 dB)
0.25 dB (0.13 dB)
0.29 dB (0.16 dB)
0.26 dB (0.14 dB)
0.26 dB (0.15 dB)
0.26 dB (0.13 dB)
0.26 dB (0.14 dB)
Worst case (root sum of squares)
—
—
—
—
—
—
—
—
0.31 dB (0.16 dB)
0.34 dB (0.17 dB)
0.35 dB (0.18 dB)
– 36 GHz
– 37 GHz
– 38 GHz
– 39 GHz
– 40 GHz
– 41 GHz
– 42 GHz
– 43 GHz
– 44 GHz
– 45 GHz
– 46 GHz
– 47 GHz
– 48 GHz
– 49 GHz
– 50 GHz
0.27 dB (0.14 dB)
0.25 dB (0.13 dB)
0.30 dB (0.15 dB)
0.27 dB (0.14 dB)
0.25 dB (0.12 dB)
—
—
—
—
—
—
—
—
—
—
0.33 dB (0.19 dB)
0.30 dB (0.15 dB)
0.35 dB (0.18 dB)
0.34 dB (0.17 dB)
0.33 dB (0.17 dB)
0.55 dB (0.35 dB)
0.50 dB (0.33 dB)
0.45 dB (0.30 dB)
0.47 dB (0.31 dB)
0.53 dB (0.32 dB)
0.49 dB (0.33 dB)
0.49 dB (0.31 dB)
0.52 dB (0.34 dB)
0.58 dB (0.36 dB)
0.53 dB (0.35 dB)
24 Keysight R347B and Q347B Operating and Service Manual
Page 25
Specifications 3
Table 3-2 R347B and Q347B supplemental characteristics
Characteristics R347B Q347B
ENR uncertainties, 0 to 55 °C
– 26.5 GHz
– 27 GHz
– 28 GHz
– 29 GHz
– 30 GHz
– 31 GHz
– 32 GHz
– 33 GHz
– 34 GHz
– 35 GHz
Worst case (root sum of squares)
0.70 dB (0.39 dB)
0.56 dB (0.31 dB)
0.61 dB (0.35 dB)
0.58 dB (0.34 dB)
0.51 dB (0.31 dB)
0.63 dB (0.37 dB)
0.5 dB (0.30 dB)
0.62 dB (0.37 dB)
0.69 dB (0.38 dB)
0.62 dB (0.35 dB)
Worst case (root sum of squares)
—
—
—
—
—
—
—
—
0.62 dB (0.34 dB)
0.48 dB (0.27 dB)
0.52 dB (0.29 dB)
– 36 GHz
– 37 GHz
– 38 GHz
– 39 GHz
– 40 GHz
– 41 GHz
– 42 GHz
– 43 GHz
– 44 GHz
– 45 GHz
– 46 GHz
– 47 GHz
– 48 GHz
– 49 GHz
– 50 GHz
0.63 dB (0.36 dB)
0.54 dB (0.31 dB)
0.53 dB (0.32 dB)
0.58 dB (0.32 dB)
0.55 dB (0.30 dB)
—
—
—
—
—
—
—
—
—
—
0.50 dB (0.30 dB)
0.41 dB (0.21 dB)
0.46 dB (0.25 dB)
0.44 dB (0.22 dB)
0.48 dB (0.27 dB)
0.66 dB (0.41 dB)
0.62 dB (0.40 dB)
0.63 dB (0.42 dB)
0.60 dB (0.39 dB)
0.71 dB (0.45 dB)
0.65 dB (0.43 dB)
0.67 dB (0.42 dB)
0.72 dB (0.48 dB)
0.75 dB (0.46 dB)
0.71 dB (0.45 dB)
Keysight R347B and Q347B Operating and Service Manual 25
Page 26
3 Specifications
Physical specifications
Tab le 3-3 Physical specifications
Specifications R347B Q347B
Net weight 0.21 kg (0.46 lb) 0.23 kg (0.51 lb)
Dimensions 52 x 108 x 60 mm (2.1 x 4.3 x 2.4 in) 53 x 108 x 62 mm (2.1 x 4.3 x 2.5 in)
26 Keysight R347B and Q347B Operating and Service Manual
Page 27
Keysight R347B and Q347B Noise Sources
Operating and Service Manual
4 Operating Guide
Operating Instructions 28
Performance Tests 31
Repair and Adjustments 31
Replaceable Parts 31
Returning a Noise Source for Calibration 32
This chapter provides simple quick-check instructions to verify the noise sources’
functionality prior to usage. It also provides information on service and
maintenance of the noise sources.
27
Page 28
4 Operating Guide
CAUTION
Operating Instructions
This section provides a simple operator’s check procedure.
Damage may occur to the waveguide flange of the noise source if the
following procedure is not followed:
Torque the waveguide flange screws to no more than 60 inch-ounces
(0.42 N•M) maximum. Insert the screws and tighten until just finger tight.
Use a calibrated torque wrench. Alternate between screws that are opposite
each other, tightening by small increments until reaching the desired torque.
Do not fully torque one screw before tightening the others.
Replace the plastic waveguide flange cover when not using the instrument.
Operator’s check
The operator’s check in this section should be performed if failure of the noise
source is suspected. The check can be used to verify that the noise source is
producing a broadband noise spectrum. It cannot be used to check the unit
against specifications.
Equipment required
– PNA-X Series network analyzer with noise figure measurement capability
(N5245A 50 GHz model option H29 or equivalent)
– N1914A or equivalent power meter
– N8487A power sensor
– 50 GHz Ecal module
– 2.4 mm-to-2.4 mm RF cable
– 2.4 mm-to-waveguide adapter
28 Keysight R347B and Q347B Operating and Service Manual
Page 29
Operating Guide 4
1 Connect the PNA-X Series network analyzer and the power meter as shown in
Figure 4-1.
Figure 4-1 Operator’s check setup
2 On the network analyzer, go to More Meas Noise and select ENR. Run the
Calibration Wizard. Select Power Meter for Receiver Characterization.
3 Calibrate the system by following the instructions given by the network
analyzer.
4 Connect the noise source (DUT) to Port 2 of the network analyzer for ENR
measurement. The measurement setup is as shown in Figure 4-2.
Figure 4-2 ENR measurement test setup
5 Monitor the measured ENR value. Below is a typical example of the ENR value
of an R347B noise source on network analyzer screens.
Keysight R347B and Q347B Operating and Service Manual 29
Page 30
4 Operating Guide
Figure 4-3 A typical example of the ENR value for R347B
30 Keysight R347B and Q347B Operating and Service Manual
Page 31
Performance Tests
NOTE
CAUTION
Due to the complex test equipment involved, there are no recommended
performance tests to perform. Return the noise source to Keysight Technologies
when tests are required to verify its performance and for periodic re-calibration.
The suggested interval before initial re-calibration is one year.
The operator’s check procedure in this manual gives a simple verification that
the noise source is simply functioning. The operator’s check should never be
considered a test of specifications.
Repair and Adjustments
Do not attempt to repair or adjust the noise source. User repair or adjustment is
not recommended because of the complex equipment required for test and
calibration. If the noise source should fail or need calibration, return it to Keysight
Technologies. The recommended interval between calibrations is one year. If the
noise source is dropped, calibration may be required.
Operating Guide 4
Do not disassemble the noise source. The diode module is extremely static
sensitive and can be easily damaged or the calibration may be altered. If the
noise source shows evidence of attempted customer repair, the warranty
may be voided.
Replaceable Parts
If any parts need replacement, return the complete noise source to Keysight
Technologies.
Keysight R347B and Q347B Operating and Service Manual 31
Page 32
4 Operating Guide
Returning a Noise Source for Calibration
When returning the 346/347 noise source to Keysight Technologies for repair or
calibration, please specify whether an ENR Data Diskette or CD is needed.
Instruments with serial prefixes MY5823 will only be provided with ENR DATA CD if
requested.
When the 346/347 noise source is used with a Keysight Noise Figure Analyzer
NFA, the ENR Data Diskette is used to automatically load the ENR values into
memory.
When the 346/347 noise source is used with an 8970/X Noise Figure Meter, you
must enter the ENR values manually, and the ENR Data Diskette is not necessary.
32 Keysight R347B and Q347B Operating and Service Manual
Page 33
Keysight R347B and Q347B Noise Sources
Operating and Service Manual
5 Using the ENR Data
Diskette or CD
Introduction 34
Loading ENR Data from Diskette 35
Retrieving ENR Data from CD 36
Saving the ENR Data to the Noise Figure Analyzer’s Internal Memory 37
Copying the ENR Data to the Noise Figure Analyzer’s Internal Memory 39
This chapter provides the information on using the ENR data for the Keysight NFA
Series Noise Figure Analyzers.
33
Page 34
5 Using the ENR Data Diskette or CD
NOTE
Introduction
The Keysight 346 and 347 series of noise sources are supplied with the noise
source ENR data preloaded on a diskette or CD to allow easy downloading into
the Keysight NFA series noise figure analyzers. This eliminates time consuming
and error prone manual keying of the ENR values.
Additionally you can easily open the ENR files using a standard text editor, and
the files are easy to interpret and create.
This chapter covers the following:
– Loading ENR data from diskette
– Retrieving ENR data from CD
– Saving the ENR data to the noise figure analyzer’s internal memory
– Copying the ENR data from the diskette to the noise figure analyzer’s internal
memory
The following procedures do not apply to noise sources used with the Keysight
8970A/B Noise Figure Meter.
You must enter ENR values manually into the 8970A/B.
34 Keysight R347B and Q347B Noise Sources Operating and Service Manual
Page 35
Loading ENR Data from Diskette
NOTE
NOTE
To load the ENR data from the diskette and use the data as the current ENR table,
proceed as follows:
1 Power up the noise figure analyzer and wait for the power-up sequence to
complete.
2 Insert the diskette into the floppy drive of the noise figure analyzer.
The following procedures do not apply to noise sources with serial prefixes
MY5823.
Do not insert the diskette into the noise figure analyzer until the power-up
sequence is complete.
3 On the noise figure analyzer, press the File key and press the Load menu key to
access the file system.
4 Press the ENR menu key and select whether the ENR table is a Meas Table
(used for measurements) or a Cal Table (used for calibration). If you intend to
use the same ENR table for calibration and measurement, then set the ENR
table as Meas Table.
Using the ENR Data Diskette or CD 5
The noise figure analyzer allows you to use the same or separate ENR tables
for calibration and measurement as required. For more details on specifying
Meas Table and Cal Table, see the Noise Figure Analyzer User’s Guide.
5 Press the Select menu key and use the arrow keys if necessary to highlight
[-A-]. If C: is the currently selected drive use the “..” directory to reach the
A: drive as directed on the screen. Press the Select menu key again to read
the diskette.
6 Use the down arrow key (↓) to highlight the ENR file and press the Enter key to
load it.
When the file is successfully loaded, a message for example, A:A0100364.ENR
file loaded appears on the display.
ENR files with a large number of frequency points (for example, up to 50 GHz)
may take a few seconds to load.
Keysight R347B and Q347B Noise Sources Operating and Service Manual 35
Page 36
5 Using the ENR Data Diskette or CD
Retrieving ENR Data from CD
Noise Source with serial prefixes MY5823 and above are supplied with the noise
source ENR data preloaded on a CD.
The ENR files can be retrieved using computer CD-ROM drive and edited using a
standard text editor.
ENR filename format
The ENR filename of the ENR file stored on the diskette or CD, for example
A0100123.enr, has the following format:
– The first letter shows the noise source type and can be:
– A = 346A
– B = 346B
– C = 346C
– R = R347A
– Q = Q347A
– The next four digits, for example 0100, show the calibration date. For example,
0100 shows a calibration date of January 2000.
–The last three digits, for example 123, are the last three digits of the serial
number of the noise source.
– The file extension is .enr to indicate ENR file format.
Once the ENR file is loaded, to verify that the ENR data is correct, press the ENR
key, then press the ENR Table> menu item to display the ENR table.
36 Keysight R347B and Q347B Noise Sources Operating and Service Manual
Page 37
Using the ENR Data Diskette or CD 5
Confirm that the noise source Serial Number and the noise source Model ID are
correct, and compare the Frequency and ENR values with the supplied Calibration
Sheet or the data printed on the body of the noise source.
Saving the ENR Data to the Noise Figure Analyzer’s Internal Memory
To save the current noise source ENR data from the diskette (A: drive) to the noise
figure analyzer’s internal memory (C: drive), proceed as follows:
1 Load the ENR table as described in “Loading ENR Data from Diskette” on
page 35.
2 Press the File key and press the Save menu key.
3 The ENR menu key indicates whether the file is currently loaded as a
measurement table (Meas Table) or a calibration table (Cal Table). Press the
ENR menu key and select whether you want to store the ENR table as a Meas
Tab le or a Cal Table. If you intend to use the same common ENR table for
calibration and measurement, then set the ENR table as Meas Table.
Keysight R347B and Q347B Noise Sources Operating and Service Manual 37
Page 38
5 Using the ENR Data Diskette or CD
The noise figure analyzer allows you to use the same or separate ENR tables
for calibration and measurement as required. For more details on using ENR
tables, see the Noise Figure Analyzer User’s Guide.
When the ENR table is selected, the Alpha Editor is now presented to you,
allowing you to specify a name for the file. If required you can use the numeric
keypad to enter numbers in the filename. Note that you can also use the
default filename which is in the format of TSTxxxx where x is a sequentially
allocated number. For details of the filename format used for the ENR data
supplied on the diskette, see “ENR filename format” on page 36.
4 Input the name of the ENR table using the Alpha Ed itor and numeric keypad.
Use the Tab key to move to the “..”: field.
5 If the To: Path: field is currently A:, press the Select menu key and use the
arrow key to highlight [-C-], then press the Select menu key again. With the
To: Path: field set to C:, press Enter to save the file with the specified
filename.
When the file is successfully saved, a message for example C:A0100364.ENR
file saved, appears on the status line of the display.
38 Keysight R347B and Q347B Noise Sources Operating and Service Manual
Page 39
Using the ENR Data Diskette or CD 5
NOTE
Copying the ENR Data to the Noise Figure Analyzer’s Internal Memory
To copy the noise source ENR data from the diskette (A: drive) to the noise figure
analyzer’s internal memory (C: drive), proceed as follows:
1 Power up the noise figure analyzer and wait for the power-up sequence to
complete.
2 Insert the diskette into the floppy drive of the noise figure analyzer.
Do not insert the diskette into the noise figure analyzer until the power-up
sequence is complete.
3 Press the File key and press the File Manager menu key.
4 Press the Copy> menu key.
The file system is now presented to you.
5 Press the ENR menu key to set the file type and format to ENR.
6 Set the From: Path: field to A:, use the down arrow key (↓) to highlight the
ENR file and the Select key to select it for copying.
The filename you are going to copy now appears in the From: Name: field.
7 Press the Tab key to navigate to the To: Path: field and ensure it is set to C:.
8 Press the Enter key to copy the selected file from the diskette (A:) to the noise
figure analyzer’s internal memory (C:).
When the file is successfully copied, a message for example A:A0100364.ENR
file copied, appears on the status line of the display.
For details on the ENR filename format, see “ENR filename format” on
page 36.
Keysight R347B and Q347B Noise Sources Operating and Service Manual 39
Page 40
5 Using the ENR Data Diskette or CD
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
40 Keysight R347B and Q347B Noise Sources Operating and Service Manual
Page 41
Keysight R347B and Q347B Noise Sources
Operating and Service Manual
6 ENR File Format
Format Details 42
Examples 47
This chapter explains the format of an ENR file.
41
Page 42
6 ENR File Format
Format Details
An ENR file:
– includes all data currently supplied on the printed noise source Calibration
– can be viewed and edited using a standard text editor (for example Notepad)
– is simple to create and interpret
– is easily printable
– is easily imported into Excel
The ENR file is read line by line. Each line is terminated by either a linefeed
character, or a carriage-return, linefeed pair. Each line must be less than 100
characters long, excluding the terminator.
Lines containing only whitespace (tab or space character) are ignored. Each line is
interpreted as one of three types of record:
–Comment
– Header Field
–ENR Data
Certificate
Comment records
A comment record must have either a ‘#’ or ‘!’ as the first character in the line. The
entire line is ignored. Comment records can appear at any point within the file.
Header fields
General form
Header fields must have a ‘[’ as the first character in the line. Each header field
has the general form:
– [FieldName OptionalValue]
–The ‘[’ must be the first character on the line.
– The fieldname and optionalvalue, if present, must be separated by whitespace.
– Whitespace following the ‘]’ is ignored.
42 Keysight R347B and Q347B Operating and Service Manual
Page 43
ENR File Format 6
NOTE
– The file must start with one or more header fields (ignoring comments and
blank lines).
All header fields must appear at the beginning of the file before the ENR data
records. Mixing header fields and ENR data is not permitted.
Mandatory header fields
Certain header fields must be present. These are:
Table 6-1 Mandatory header fields
FieldName Description OptionalValue Description Example
Filetype
Version
Indicates the type of
file
Indicates the version of
the file format which
applies to this file
ENR
versionnumber
(formatted as
major.minor)
Only ’ENR’ is allowed
for ENR data files
Allows for future
changes in the file
format.
[Filetype ENR]
[Version 1.0]
All mandatory fields must appear in the file before any optional header fields.
Optional header fields
The following header fields are also allowed. Note that only the first two,
Serialnumber and Model are currently used by the noise figure analyzer.
Table 6-2 Optional header fields
FieldName Description OptionalValue Description Example
Serialnumber
Model
The serial number of
the noise source
Identifies the noise
source model number
serialtext
modelcode Model code string [Model 346B]
A string containing
the serial number
[Serialnumber
3318A14223]
Option
Identifies any model
code option
optioncode Option code string [Option 001]
Keysight R347B and Q347B Operating and Service Manual 43
Page 44
6 ENR File Format
Tab le 6-2 Optional header fields
FieldName Description OptionalValue Description Example
Caldate
Calduedate
Temperature
Humidity
The format of date&time parameters is YYYYMMDD[.hh:mm:ss], i.e. a 4-digit
year, 2-digit month, and 2-digit date, optionally followed by a ‘.’ then 2-digit
hour ‘:’ 2-digit minutes ‘:’ 2-digit seconds.
Unknown header fields are ignored by the noise figure analyzer. This allows for
future expansion.
Date of calibration of
noise source
Indicates date when
next calibration of
noise source is due
Calibration
temperature
Calibration relative
humidity
date&time
date&time
value
value
Formatted date and
optional time
Formatted date and
optional time
Number followed by
unit. Valid units are
C, F, K
Number followed by
optional ’%’
[Caldate
19991202.09:15
:30]
[Calduedate
20001225]
[Temperature
24C]
[Humidity 40%]
44 Keysight R347B and Q347B Operating and Service Manual
Page 45
ENR data
NOTE
ENR data records must be ordered from the lowest to the highest frequency.
General form
The noise figure analyzer attempts to interpret lines which are not comments or
header fields as ENR data. ENR data has the general form:
Freq [Funit] ENR [Eunit] [Euncert [on_mag on_phase off_mag
off_phase [Runcert]]]
The square brackets denote optional fields.
Field separator
Each field is separated by whitespace. A single ‘,’ is allowed within or instead of
the whitespace.
Numeric fields
ENR File Format 6
With the exception of the two optional unit fields, the other fields are numeric.
Numbers are formatted as an optional sign, followed by a sequence of one or
more digits (which can include a single decimal point within the sequence),
followed by an optional exponent. The exponent consists of the ‘e’ or ‘E’ followed
by an optional sign followed by between one and three digits.
Frequency fields
The frequency field (Freq) is the frequency at which the ENR amplitude was
measured.
The frequency unit field (Funit) is optional. The default unit is Hz.
Valid units are Hz, kHz, MHz, GHz, THz. Units are not case sensitive.
ENR fields
The ENR amplitude (ENR) is the measured ENR at the specified frequency.
Keysight R347B and Q347B Operating and Service Manual 45
Page 46
6 ENR File Format
The ENR unit field (Eunit) is optional. The default unit is dB. Currently, the only
allowed unit is dB. Note that units K, C, F (temperature) are reserved for possible
future use, but are not supported by the noise figure analyzer at this time.
The uncertainty field for the ENR amplitude (Euncert) is optional. However, this
field must be present if reflection coefficient data is supplied.
Reflection coefficient data
The reflection coefficient data is optional and is formatted as four fields
(on_mag, on_phase, off_mag, off_phase):
– reflection magnitude with noise source on
– reflection angle (in degrees) with noise source on
– reflection angle with noise source off
– reflection angle (degrees) with noise source off
If any reflection coefficient data is supplied, then all four fields must be present.
Note that the file format requires that the ENR uncertainty field must be present
before any reflection data.
The reflection coefficient uncertainty (Runcert) is an optional parameter.
Reflection coefficient data must be present if this field is supplied.
46 Keysight R347B and Q347B Operating and Service Manual
Page 47
Examples
Example 1
ENR File Format 6
This first example shows a simple ENR file where the Frequency and ENR values
have been entered manually into the noise figure analyzer:
# ENR Data File
# Created by N8973A Keysight NFA Series Noise Figure Analyzer
# Serial Number US00000012 Firmware Revision X.09.02
# 13:37:07 Mar 28, 2000
# Format is: Frequency (Hz), ENR (dB)
[Filetype ENR]
[Version 1.0]
Keysight R347B and Q347B Operating and Service Manual 47
Page 48
6 ENR File Format
Example 2
The second example is a typical ENR file supplied on diskette or CD with a noise
source:
[Filetype ENR]
[Version 1.0]
[Serialnumber MY44420312]
[Model R347B]
[Caldate 20180228.10:38:49]
[Temperature 24C]
[Humidity 40%]
48 Keysight R347B and Q347B Operating and Service Manual
Page 49
This information is subject to change
without notice. Always refer to the
English version at the Keysight
website for the latest revision.
© Keysight Technologies 2007-2018
Edition 3, August 1, 2018
Printed in Malaysia
*00347-90013*
Loading...