Keysight Technologies
N5252A Vector Network
Analyzer System
Use this manual in conjunction with the following
Keysight documents and VDI website:
- Keysight M937xA PXIe Vector Network Analyzer
Modules Startup Guide
Part Number M9370-90001
- Keysight M9005A PXIe Chassis User Guide
Part Number M9005-90001
- Vector Network Analyzer Extenders
(VNAX) from Virginia Diodes, Inc.
https://www.vadiodes.com/en/products/
vector-network-analyzer-extension-modules
User's Guide
Notices
© Keysight Technologies, Inc. 2018,
2019
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.
Trademark Acknowledgments
Manual Part Number
N5252-90002
Edition
Print Date, January 2019
Supersedes: December 2018
Printed in USA
Published by:
Keysight Technologies
1400 Fountaingrove Parkway Santa
Rosa, CA 95403
Warranty
THE MATERIAL CONTAINED IN
THIS DOCUMENT IS PROVIDED “AS
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The hardware and/or software
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U.S. Government Rights
The Software is “commercial
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(“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
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Accordingly, Keysight provides
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Furnish technical information
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software or commercial
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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
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A WARNING notice denotes a hazard.
It calls attention to an operating
procedure, practice, or the like that,
if not correctly performed or
adhered
injury or death. Do not proceed
beyond a WARNING notice until the
indicated conditions are fully
understood and met.
to, could result in damage
to, could result in personal
i
User's Guide N5252-90002
Table of Contents
Keysight N5252A PXIe Vector Network Analyzer System
System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Available Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
em Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Syst
Recomme
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Limitations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
System Setup
Har
Software
nded Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
and Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
dware Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
rt Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2-Po
4-Port Setu
Turning On
Configuring Your System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Receiver Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
p. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Installation and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Your System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Dynamic Range Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Stability Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Installation Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
System Cal
Example System Calibrat
ibration with N5262AC12 Calibration Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
ion Using a Smart Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Smart Cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Receiver Power Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Level Control and Max Power Level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Contents-1
Table of Contents
Maintenance and Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Troubleshooting Your System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
stem Computer Setup Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Sy
Hardware Performance Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
System Performance Issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 31
.
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
ectrical Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
El
Caring for Waveguide (WG) Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Principles of Connector Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Safety and Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
ety Earth Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Saf
fore Applying Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Be
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrostatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 32
. . . . 33
. . 35
. .
. .
. . 36
. . 38
. . 39
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Keysight Support, Services, and Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Service and Support Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Contacting Keysight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Contents-2
. . 40
System Description
User's Guide N5252-90002
5
6
User's Guide N5252-90002
Introduction
The Keysight N5252A is a PXI-based Millimter-wave Vector Network Analyzer System for
S-Parameter measurements.
Available Options
• Option 200 provides items for a 2-Port E-Band (60-90 GHz) system. See Figure 1.
• Option 400 provides items for a 4-Port E-Band (60-90 GHz) system. See Figure 2.
System Components
• M9374A PXIe Network Analyzer Modules (300 kHz-20 GHz).
• N5252AW12 - TxRx VNAX Millimeter-wave VDI VNA Extenders (60-90 GHz).
• M9005A PXIe Chassis: 5-slot, 3U, with an Integrated System Module and a PCIe
desktop adapter for use with a tower computer.
• N5262AC12 - WR12 (E-Band, 60-90 GHz) Calibration Kit from VDI. See Figure 3.
• Cable sets (1.2 m) and power supplies.
• USB drive with power level data of N5252AW12 extenders and VDI User's Guide.
Recommended Accessories
• N1913A/14A Power Meter or equivalent
• E8486A-200 (with Option 002) Waveguide Power Sensor, or
U8489A with E281CS Adapter
Not provided, but required, are a tower computer with an available PCIe
slot, monitor, mouse, and keyboard. Refer to the M9005A PXIe Chassis
User Guide for computer requirements.
Features
• The VNA provides power level adjustment at the output of the Frequency Extender.
• Enhanced power level accuracy with calibration using your power meter and power
sensor.
• Can be used as a 300 kHz to 20 GHz VNA or mm-wave system.
Limitations
• Not all applications are supported. See Table 2 on page 7.
• All ports must be configured for a mm-wave system or a M9374A VNA system. You
cannot configure the system for a mm-wave and 20 GHz VNA system at the same time.
• Trace noise for receiver and wave measurements will degrade for IF bandwidths less than
100 Hz.
• This is a sensitive measurement apparatus by design and may have some performance
loss (up to 35 dB above the noise floor) when exposed to ambient continuous
electromagnetic phenomenon in 3-5 MHz when tested per IEC 61000-4-6.
User's Guide N5252-90002
7
Specifications
Table 1 Specifications
Frequency
Range:
Performance
1
Dynamic Range (dB typ.):
Test Port Power (dBm, typ.):
Magnitude Stability (± dB, typ.):
Phase Stability (± deg, typ.):
60-90 GHz
BW=10 Hz, 110
13
0.15
2
VDI Extender Characteristics
RF/Ref Port:
LO Input:
LO Output:
Meas. IF Output:
-4 to +2 dBm input, 10-15 GHz, -3 dBm max output, ~ 4 MHz
-10 to +5 dBm, 10-15 GHz
-7 to +13 dBm, 10-15 GHz
-1 dBm max, 4 MHz
Physical Attributes
Weight and size dimensions for the M9005A Chassis can be found in its User Guide (M9005-90001).
Weight and size dimensions for the VDI Extenders can be found on their product page at
https://www.vadiodes.com/en/products/vector-network-analyzer-extension-modules
Environmental Requirements
Refer to the M937xA and M9005A User Guides for environmental requirements for the N5252A system.
Table 2 Application Support
Option
Application
007 Automatic Fixture Removal
010 Time Domain
551 N-Port Calibration
009 Frequency Offset Mode
This is a sensitive measurement apparatus by design and may have some performance loss (up to 35 dB above the
1.
noise floor) when exposed to ambient continuous electromagnetic phenomenon in 3-5 MHz when tested per IEC
61000-4-6.
Availability
Optional
Optional
Included
Not Available
Figure 1 N5252A 2-Port Configuration
8
User's Guide N5252-90002
Figure 2 N5252A 4-Port Configuration
Figure 3 N5262AC12 - WR12 (E-Band, 60-90 GHz) Calibration Kit from VDI
User's Guide N5252-90002
910User's Guide N5252-90002
System Setup and Installation
User's Guide N5252-90002
11
System Setup and Installation
12
User's Guide N5252-90002
Hardware Setup
The M9374A modules are installed into the M9005A chassis at the factory, with the
interconnects as shown in Figure 4 below. Two modules are installed for Option 200
and four modules for Option 400.
1. Install the M9005A-002 PCIe desktop adapter into your tower PC expansion slot. For an
example, consult the Keysight M9048A PCIe Desktop Adapter Installation Guide (which is
a similar installation) at https://literature.cdn.keysight.com/litweb/pdf/
M9048-90001.pdf?id=2226811.
2. Connect the supplied interface cable (M9005-61301) to the cable port on the back of the
M9005A chassis (MXI-Express x1), then connect the other end of the cable to the PCIe
desktop adapter connection port on the back of the PC. Consult the M9005A User Guide
for details.
3. Connect the supplied power cord to the M9005A chassis, but do not apply power until
the system setup is complete.
4. Ensure reference jumper cables, trigger jumper cables, and 50 Ω loads are installed.
Figure 4 M9005A PXIe Chassis with four M9374A Modules (Option 400)
2-Port Setup
User's Guide N5252-90002
13
Port 1 Configuration
1. Remove the 50 ohm load from LO Out on M9374A Module #1.
2. Install the three cables between M9374A Module #1 and VDI Extender #1. See Table 3 and
Figure 5.
3. If not already installed, install a 50 Ω load to LO In on M9374A Module #1. See Figure 5.
4. Connect VDI Extender #1 (LO-O) to VDI Extender #2 (LO-I) with an RF/LO cable. See Figure 5.
5. Connect the power cord to VDI Extender #1. See Figure 5.
Table 3 Port 1 Configuration Cable Connections
Figure
Reference
A.
B.
C.
Figure 5
Cable
Type
RF/LO
RF-LO
IF
Port 1 Configuration
A.
B.
M9374A
Module #1
Port 1
LO Out
Port 2
to
to
to
VDI
Extender #2
RF/R
LO-I
M
M9374A Module #1 with VDI Extender #1
C
.
Port 2 Configuration
14
User's Guide N5252-90002
1. Install the two cables between M9374A Module #2 and VDI Extender #2. See Table 4 and
Figure 6.
2. If not already installed, install two 50 Ω loads to LO In and LO Out on M9374A Module #2. If
not already installed, install a reference jumper and a trigger jumper on Modules #1 and #2.
See Figure 6.
3. Add a 50 Ω load (use the load removed from Module #1) to LO-O on VDI Extender #2. See
Table 4 and Figure 6. If Option 400 is to be used, connect VDI Extender #2 (LO-O) to VDI
Extender #3 (LO-I) with an RF/LO cable.
4. Connect the power cord to VDI Extender #2. See Figure 6.
An RF cable up to 5 meters in length can be used for an LO-O to LO-I connection
between extenders. The M9374A LO Out can only support 1.2 meter cable lengths.
Table 4 Port 2
Figure
Reference
A.
B.
C.
Configuration Cable Connections
Cable
Type
RF/LO
IF
50 Ω Load (or RF/LO
for Option 400)
Figure 6 Port 2 Configuration
M9374A
Module #2
Po
Port 2
rt 1
-
M9374A Module #2 with VDI Extender #2
A.
VDI
Extender #2
to
to
C.
Load (or RF/LO cable to LO-I of VDI Extender #3)
RF/R
M
LO-O
B.
4-Port Setup
User's Guide N5252-90002
15
Port 3 Configuration - Option 400 Only
1. Install the two cables between M9374A Module #3 and VDI Extender #3. See Table 5 and
Figure 7.
2. If not already installed, install two 50 Ω loads to LO In and LO Out on M9374A Module #3. If
not already installed, install a reference jumper and a trigger jumper on Modules #2 and #3.
See Figure 7.
3. Confirm Port 2 LO-O is connected to Port 3 LO-I.
4. Connect VDI Extender #3 (LO-O) to VDI Extender #4 (LO-I) with an RF/LO cable. See Figure 7.
5. Connect the power cord to VDI Extender #3. See Figure 7.
An RF cable up to 5 meters in length can be used for an LO-O to LO-I connection
between extenders. The M9374A LO Out can only support 1.2 meter cable lengths.
Table 5 Port 3 Configuration Cable Connections
Figure
Reference
A.
B.
Figure 7
rt 1
to
to
VDI
Extender #3
RF/R
M
Cable
Type
RF/LO
IF
M9374A
Module #3
Po
Port 2
Port 3 Configuration
M9374A Module #3 with VDI Extender #3
A.
B.
Port 4 Configuration - Option 400 Only
16
User's Guide N5252-90002
1. Install the two cables between M9374A Module #4 and VDI Extender #4. See Table 6 and
Figure 8.
2. If not already installed, install two 50 Ω loads to LO In and LO Out on M9374A Module #4. If
not already installed, install a reference jumper and a trigger jumper on Modules #3 and #4.
See Figure 8.
3. Install a 50 Ω load (use the load removed from Module #1) to VDI Extender #4 (LO-O). See
Figure 8.
4. Connect the power cord to VDI Extender #4. See Figure 8.
An RF cable up to 5 meters in length can be used for an LO-O to LO-I connection
between extenders. The M9374A LO Out can only support 1.2 meter cable lengths.
Table 6 Port 4 Configuration Cable Connections
Figure
Reference
A.
B.
Cable
Type
RF/LO
IF
Figure 8 Port 4 Configuration
rt 1
to
to
VDI
Extender #4
RF/R
M
M9374A
Module #4
Po
Port 2
M9374A Module #4 with VDI Extender #4
A.
B.
Software Installation and Setup
User's Guide N5252-90002
17
There are three software items that need to be installed onto your computer:
• Keysight IO Libraries Suite
• Keysight M9005A PXIe Chassis driver software
• Vector Network Analyzer software - Network Analyzer application
1. Keysight IO Libraries Suite - Download and install the Keysight IO Libraries Suite at
https://www.keysight.com/en/pd-1985909/io-libraries-suite.
2. Keysight M9005A PXIe Chassis drivers - Refer to the Keysight M9005A PXIe Chassis
User Guide (M9005-90001) "Getting Started with the System" section for installation
instructions. The driver software can be installed from the M9005 PXIe Chassis
Product Software and Information CD included with the shipment, or from Keysight's
website at https://www.keysight.com/main/software.jspx?
ckey=2875949&lc=eng&cc=US&nid=-32038.1195640&id=2875949.
3. Vector Network Analyzer software (Network Analyzer application) - To download
your application firmware, visit the Keysight N5252A system product page at https://
www.keysight.com/main/techSupport.jspx?
cc=US&lc=eng&nid=-32494.1254980&pid=2964095&pageMode=DS.
4. Once the software has been installed, turn the computer off.
Disable "Sleep Mode" on your PC when running the Network Analyzer
application. Leaving it on will cause the application to crash.
Turning On Your System
Turn on the M9005A chassis first, before turning on your computer.
Turning on the chassis first will normally turn on the system computer by
itself. If not, check the M9005A connections to your computer.
Configuring Your System
18
User's Guide N5252-90002
Turn on the M9005A chassis, which should turn on your computer. Run the Network
Analyzer Application, which will start up in the Standard PNA configuration. Refer to the
VNA Help menu to add a new N5252A configuration (Setup > External Hardware >
Millimeter Config > New > name "N5252A"). See Table 7 and Figure 9 below for the
settings that should be used.
Table 7 Configuration Settings
Module
RF Multiplier
LO Multiplier
Test Port
Figure 9 N5252A Configuration
Settings
6
6
60 GHz Start; 90 GHz Stop
Once the N5252A configuration is complete, proceed to Installation Calibration on page 25,
or continue with System Check on page 19.
System Check
User's Guide N5252-90002
19
The following system checks will confirm the system is connected and operating
correctly: Receiver Check, Dynamic Range Check, and Stability Check.
Refer to the Help menu for assistance.
Receiver Check
N5252A-200 (2-Port) System Receiver Check
1. Leave the ports open.
2. Select Preset > System > Service > Diagnostics > Receiver Display
Table 8 2-Port Receiver Check
Display Window
A,1
B,1
R1,1
R2,2
Set Value
-20 ±10 dB
-20 ±10 dB
-5 ±10 dB
-5 ±10 dB
4. See Figure 10 on page 20 for a display example.
N5252A-400 (4-Port) System Receiver Check
1. Leave the ports open.
2. Select Preset > System > Service > Diagnostics > Receiver Display
Table 9 4-Port Receiver Check
Display Window
A,1
B,2
C,3
Set Value
-20 ±10 dB
-20 ±10 dB
-20 ±10 dB
D,4
R1,1
R2,2
R3,3
R4,4
-20 ±10 dB
-5 ±10 dB
-5 ±10 dB
-5 ±10 dB
-5 ±10 dB
4. See Figure 11 on page 20 for a display example.
Figure 10 2-Port Receiver Check
20
User's Guide N5252-90002
Figure 11 4-Port Receiver Check
Dynamic Range Check
User's Guide N5252-90002
21
N5252A-200 (2-Port) System
1. Connect the VNA extender waveguide Ports 1 and 2 together.
2. Select Preset.
3. Set the power level to 20 dBm.
4. Ensure that the following traces are each set up in a display window (turn on
"Statistics" for each trace and refer to the mean value):
a. S12 - Trace
b. S21 - Trace
5. Normalize the S12 and S21 traces.
6. Set IF BW to 10 Hz.
7. Separate the VNA extenders and connect a flush short to the ends of each, at Port 1
and Port 2.
8. Set the scale reference level to -100 dB in each window.
9. See Figure 12 below for a display example.
10. Verify the mean value is ≥ -100 dB for each trace.
Figure 12 2-Port Dynamic Range Check with Statistics
N5252A-400 (4-Port System)
22
User's Guide N5252-90002
1. Connect the VNA extender waveguide Ports 3 and 4 together.
2. Select Preset.
3. Set the power level to 20 dBm.
4. Ensure that the following four traces are each setup in a display window (turn on
"Statistics" for each trace):
a. S12 - Trace Uncorrected Thru
b. S21 - Trace Uncorrected Thru
c. S34 - Trace Uncorrected Thru
d. S43 - Trace Uncorrected Thru
5. Normalize the S12, S21, S34 and S43 traces.
6. Set IF BW to 10 Hz.
7. Separate the VNA extenders and connect a flush short (or load) to the end of each
port.
8. Set the scale reference level to -100 dB for each window.
9. Verify the mean value is ≥ -100 dB for each trace.
10. See Figure 13 below for a display example.
Figure 13 4-Port Dynamic Range Check with Statistics
Stability Check
User's Guide N5252-90002
23
1. Attach flush shorts to Port 1 and Port 2 on the mm-wave extenders.
2. Select Preset.
3. Set IF Bandwidth to 100 Hz.
4. Setup traces in separate display windows, with four windows for 2-Port and
eight windows for 4-Port. For Port 1 and 2, setup the following traces:
S11 scale format log mag, scale 0.1 dB
S11 scale format phase, scale 1 degree
S22 scale format log mag, scale 0.1 dB
S22 scale format phase, scale 1 degree.
5. Normalize each trace and turn on "Statistics."
6. If the system has been on for less than one hour, some drift is expected.
Measurements are to be made in a stable temperature environment.
Amplitude stability and trace noise: ± .15 dB1
Phase drift and noise: ± 2 degrees1
7. See Figure 14 for a display example.
8. Repeat for Port 3 and Port 4.
9. Attach flush shorts to mm-wave extenders Port 3 and Port 4.
10. Select Preset.
11. Set IF BW to 100 Hz.
12. Setup traces in separate windows:
S33 scale format log mag, scale 0.1 dB
S33 scale format phase, scale 1 degree
S44 scale format log mag, scale 0.1 dB
S44 scale format phase, scale 1 degree
13. See Figure 14 for a display example.
1. Values are typical.
Figure 14 2-Port Function Check - Stability and Trace Noise (100 Hz)
24
User's Guide N5252-90002
Installation Calibration
User's Guide N5252-90002
25
An Installation Calibration is recommended for most applications. The Installation
Calibration can be turned off and on as needed.
Important Notes:
• If power level control is required, perform an Installation Calibration.
• The Installation calibration should be done each time a change is made to the
physical configuration, i.e., a cable change, a change in a millimeter extender,
or a change in a PXIe module.
• The Installation Calibration characterizes the input/output power relationship
for each millimeter extender.
• The Installation Calibration results in a crude (± 5 dB) source power calibration.
• The Installation Calibration does NOT provide any calibration of the VNA
receivers.
• The Installation Calibration is applied system-wide. It can be enabled and
disabled, but only on a system-wide basis. It cannot be enabled or disabled on
a channel-by-channel basis.
In the Network Analyzer application screen, open the Millimeter Configuration window
by selecting Preset > Setup > External Hardware > Millimeter Config...
In the Millimeter Configuration window, open the Installation Cal Status window by
selecting Installation Cal... (see Figure 9 on page 18).
Please note that the Model entry in the table column will always show Not Available, as
the banded mm-wave extenders do not have components to report model information
to the VNA. See Figure 15 below.
Once the calibration is completed, the calibration date will be updated with the current
date on your computer.
Click on the Help button (see Figure 15 below) for step-by-step instructions on how to
perform the Installation Calibration.
Figure 15 Installation Cal Status Window
System Calibration with N5262AC12 Calibration Kit
26
User's Guide N5252-90002
For un-ratioed measurements, 100 Hz IF BW is the lowest recommended
bandwidth. Refer to the Help menu for detailed calibration information.
Example System Calibration Using a Smart Cal
To improve the accuracy of your system, this section of the User's Guide will
outline the process for performing a Smart Cal for a system calibration. Refer to
the Help menu for details.
Smart Cal
Equipment Required:
• WR12 Calibration Kit
• Waveguide Power Meter with an E8486A-200 Power Sensor or equivalent
(Ensure power sensor calibration table is loaded)
Procedure:
1. Load the cal kit file into your computer. The cal kit file is located on the
USB drive that came with the cal kit. Plug the USB drive into the USB
port on your PC.
2. Select Cal > Cal Sets & Cal Kits > Cal Kit...
3. With the USB drive plugged into the PC, select Import and open the
WR12_VDI calibration kit file.
4. Select Preset
5. Select Cal > Other Cals > Smart Cal
6. Select the box for "Calibrate source power and receiver power."
7. Refer to the Help menu to complete the Smart Cal.
8. Once the Smart Cal is complete, save the calibration if desired.
Receiver Power Check
Power accuracy is not warranted and is dependent the accuracy of your
power sensor.
After calibration, the receivers will show power at the test ports.
Power Level Control and Max Power Level
User's Guide N5252-90002
27
1. Set up two traces, making sure "Statistics" is turned on.
a. For 2-Port: a1,1 and a2,2
b. For 4-port: a3,3 and a4,4
2. Measure the power level at -5 dBm (default). Verify the traces are measuring -5 dBm
(mean), ± 1 dB.
3. Set the power level to 0 dBm. Verify the traces are measuring 0 dBm (mean), ± 1 dB.
4. Set the power level to 13 dBm. Verify the traces are measuring a mean of 13 dBm,
±1 dBm.
5. See Figure 16 below for a display example for 2-port, or Figure 17 for 4 -port.
Figure 16
2-Port Function Check - Power
Figure 17 4-Port Function Check - Power
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User's Guide N5252-90002
Maintenance and Support
User's Guide N5252-90002
29
Troubleshooting Your System
30
User's Guide N5252-90002
The following section will help to resolve common system problems. If a failure is
confirmed, refer to Keysight Support Services. See "Contacting Keysight" on page 41.
System Computer Setup Issues
Computer Not Recognizing the M9005A Chassis
1. Ensure the M9005A-002 PXIe card is fully seated and recognized by
your computer.
2. Ensure the cable between the M9005A and the PXIe card is fully
connected.
3. Ensure the M9005A is turned on before the computer.
4. Refer to the Keysight M9005A PXIe Chassis User Guide for more
information.
Hardware Performance Issues
Receiver Check Failure
If the system fails the receiver check, first confirm that the millimeter
configuration is set up correctly. Verify the following:
1. Frequency range is 60 GHz to 90 GHz.
2. Multipliers are set to RF = 6 and LO = 6.
3. Default value for the maximum power limit is 2 dB.
Refer to Figure 10 (or Figure 11, if performing a 4-Port receiver check) on page 20.
4. Verify the connections for each extender are correct and the power
supplies are turned on (the green LED light should be lit on the rear
of each extender).
5. The M9005A and the M9374A modules can be verified as a 300 kHz
to 20 GHz system. Refer to the M937xA PXIe Vector Network
Analyzer Modules Startup Guide.
System Performance Issues
Receiver Test Failure
If the receiver test fails with the ports open:
1. Connect a short to the port with the issue. The receiver level should
be higher for A1,1 , B2,2 , C3,3 , or D4,4 , depending on which port
is being checked. Opens can cause misleading results.
If the receiver power check fails:
User's Guide N5252-90002
31
1. Ensure the Installation Calibration and Smart Cal have been
completed, calibrating both source and receiver power.
2. Verify that the power sensor is accurate and not damaged,
especially at the connector. See page 34.
3. Verify the condition of the Calibration Kit components. If cleaning is
needed, refer to pages 33 and 34.
If the receiver power is not meeting +13 dBm, ± 1 dB, mean:
1. The VDI extenders need +2 dBm at the RF/REF IF input to reach full
power output. Verify the cable has + 2 dBm from one end of the cable
to the extender when the VNA power level is set to +20 dBm.
2. Verify that the LO Input at the end of the cable is at least -7 dBm.
3. Verify the condition of the Calibration Kit components. If cleaning is
needed, refer to pages 33 and 34.
Refer to the VDI website at https://www.vadiodes.com/en/products/vector-
network-analyzer-extension-modules for VDI extender characteristics.
If an extender or the Calibration Kit is suspected, it will need to be returned to
the vendor for service. VDI extenders must be returned in the Pelican case.
If your issue is not component specific and is still unresolved, it is recommended
that you return the entire system to Keysight. Refer to "Contacting Keysight" on
page 41.
Replacement Parts
Table 10 Replacement Parts
Keysight Part Number
1810-0118
M9005-61301
M9005-66002
M9370-20018
M9370-20019
Y1212-80011
Description
SMA 50 Ohm Load (Male)
PCIe Cable 3m
PCI Express Host Card (1 Port PCIe)
SMB Trigger Jumper
SMB Reference Jumper
PXI Air Blocker Kit
Block Diagram
32
User's Guide N5252-90002
Figure 18 N5252A System Block Diagram
Maintenance
User's Guide N5252-90002
33
To prevent electrical shock, remove the chassis and VDI modules from the
mains source before cleaning. If an analyzer module needs cleaning,
remove it from the chassis slot. Use a dry cloth or one slightly dampened
with water to clean the external case parts. Do not attempt to clean
internally.
Physical Maintenance
Clean the system components using a dry or slightly damp cloth only.
Electrical Maintenance
The M9005A and M9374A products can be serviced as individual products. The VDI
Calibration Kit and VDI Extenders require servicing by Virginia Diodes, Inc.
Caring for Waveguide (WG) Interfaces
A clean surface at millimeter-wave frequencies is much more important than at lower
frequencies because any debris on the waveguide surface can potentially distort the
measurement results.
Caring for WG interfaces is not difficult. Dirt and dust can be removed using the following:
• Isopropyl alcohol 99.5 %
• Lint-free cloth
• Pressurized air (for dust removal)
1
To remove dirt on the waveguide surface, simply put a few drops of isopropyl alcohol on a lintfree cloth and gently wipe the surface.
To remove dust, simply spray the pressurized air on the waveguide surface.
1. Use isopropyl alcohol only in a well-ventilated area. Allow all residual alcohol moisture to evaporate, and
the fumes to dissipate, prior to assembling waveguide interfaces.
Principles of C
34
User's Guide N5252-90002
onnector C
are
Proper connector care and connection techniques are critical for accurate and repeatable
measurements. Refer to Table 11 below for tips on connector care.
Prior to making connections to your analyzer, carefully review the information about how to
properly inspect, clean,
and gauge connectors.
Refer to the calibration kit documentation for
detailed connector care information.
For additional connector care instruction, contact Keysight Technologies. Refer to “Contacting
Keysight” on page 41.
Table 11 Connector Care Quick Reference Guide
Handling and Storage
• Keep connectors clean
• Extend sleeve or connector nut
• Use plastic end-caps during storage
Visual Inspection
• Inspect all connectors carefully
• Look for metal particles, scratches, and dents
Connector Cleaning
Do Do Not
• Try compressed air first
• Use isopropyl alcohol
• Clean connector threads
a
Do NotDo
Do Not
• Touch mating-plane surfaces
• Set connectors contact-end down
• Store connectors or adapters loose
Do
• Use a damaged connector - ever
• Use any abrasives
• Get liquid into plastic support beads
Gauge Use with Connectors
• Clean and zero the guage before use
Do
• Use the correct gauge type
• Use correct end of calibration block
• Gauge all connectors before first use
Making Connections
• Align connectors carefully
• Make preliminary connection contact lightly
• Turn only the connector nut
• Use a torque wrench for final connection
a. Cleaning connectors with alcohol shall only be done with the instrument’s power cord removed,
and in a well-ventilated area. Allow all residual alcohol moisture to evaporate, and the fumes to
dissipate, prior to energizing the instrument.
Do Not
Do NotDo
• Use an out-of-specification connector
• Apply bending force to connection
• Over tighten preliminary connection
• Twist or screw any connection
• Tighten past torque wrench “break” point
Safety and Regulatory Information
User's Guide N5252-90002
35
General Safety Considerations
36
User's Guide N5252-90002
Safety Earth Ground
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 instrument, will make the instrument dangerous.
Intentional interruption is prohibited.
Always use the three-prong AC power cord supplied with this product. Failure
to ensure adequate grounding by not using this cord may cause product
damage.
Before Applying Power
If this product is to be energized via an autotransformer make sure the common
terminal is connected to the neutral (grounded side of the mains supply).
This product is designed for use in Installation Category II and Pollution Degree 2.
Servicing
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.
The opening of covers or removal of parts may expose dangerous voltages.
User's Guide N5252-90002
37
Disconnect the instrument from all voltage sources while it is opened.
Danger of explosion if battery is incorrectly replaced. Replace only with
the same or equivalent type recommended. Discard used batteries
according to manufacturer’s instructions.
Procedures described in this document may be performed with power
supplied to the product while protective covers are removed. Energy
available at many points may, if contacted, result in personal injury.
The power cord is connected to internal capacitors that may remain live for
10 seconds after disconnecting the plug from its power supply.
For continued protection against fire hazard, replace line fuse only with same
type and rating. The use of other fuses or material is prohibited.
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).
Electrostatic Discharge Protection
38
User's Guide N5252-90002
Protection against electrostatic discharge (ESD) is essential while removing assemblies from or
connecting cables to the system components. Static electricity can build up on your body and
can easily damage sensitive internal circuit elements when discharged. Static discharges too
small to be felt can cause permanent damage. To prevent damage to the instrument:
• always have a grounded, conductive table mat in front of your test equipment.
• always wear a grounded wrist strap, connected to a grounded conductive table mat, having a
1 MΩ resistor in series with it, when handling components and assemblies or when making
connections.
• always wear a heel strap when working in an area with a conductive floor. If you are uncertain
about the conductivity of your floor, wear a heel strap.
• always ground yourself before you clean, inspect, or make a connection to a static-sensitive
device or test port. You can, for example, grasp the grounded outer shell of the test port or
cable connector briefly.
• always ground the center conductor of a test cable before making a connection to the
analyzer test port or other static-sensitive device. This can be done as follows:
1. Connect a short (from your calibration kit) to one end of the cable to short the center
conductor to the outer conductor.
2. While wearing a grounded wrist strap, grasp the outer shell of the cable connector.
3. Connect the other end of the cable to the test port and remove the short from the cable.
Figure 19 below shows a typical ESD protection setup using a grounded mat and wrist strap.
Figure 19 ESD Protection Setup
Instrument Markings
User's Guide N5252-90002
39
Listed below are definitions of markings that may be found on or with the product.
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.
This symbol indicates that the input power required is AC.
This WEEE 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.
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 marking is a registered trademark of the European Community (if accompanied by a
year, it is the year when the design was proven). It indicates that the product complies with
all relevant directives.
ICES/NMB-001
IP 2 0
The Keysight email address is required by EU directives applicable to our product.
The CSA mark is a registered trademark of the CSA International.
This is a symbol of an Industrial Scientific and Medical Group 1 Class A product (CISPR 11,
Clause 5).
This is a marking to indicate product compliance with the Canadian Interference-Causing
Equipment Standard (ICES-001).
Direct Current.
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.
China Restricted Substance Product Label. The EPUP (environmental protection use period)
number in the center indicates the time period during which no hazardous or toxic
substances or elements are expected to leak or deteriorate during normal use and generally
reflects the expected useful life of the product.
Universal recycling symbol. This symbol indicates compliance with the China standard GB
18455-2001 as required by the China RoHS regulations for paper/fiberboard packaging.
R-R-Kst-
ZZZZZZZ
South Korean Certification (KC) mark. It includes the marking’s identifier code in the format
shown.
Regulatory Information
40
User's Guide N5252-90002
Instructions for Use
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.
EMC
Complies with the essential requirements of the European EMC Directive as well as
current editions of the following standards (dates and editions are cited in the
Declaration of Conformity):
— IEC/EN 61326-1
— CISPR Pub 11 Group 1, class A
— AS/NZS CISPR 11
— ICES/NMB-001
This ISM device complies with Canadian ICES-001.
Cet appareil ISM est con
forme a la norme
This is a sensitive measurement apparatus by design and may have some performance
loss (up to 35 dB above the noise floor) when exposed to ambient continuous
electromagnetic phenomenon in 3-5 MHz when tested per IEC 61000-4-6.
South Korean Class A EMC Declaration
If there is a "KC" mark on the instrument, then the following statement applies:
This equipment has been conformity assessed for use in business environments.
In a residential environment, this equipment may cause radio interference.
※ This EMC statement applies to the equipment only for use in a business environment.
NMB-001 du
Canada.
이 기기는 업무용 환경에서 사용할 목적으로 적합성평가를 받은 기기로서
가정용 환경에서 사용하는 경우 전파간섭의 우려가 있습니다.
※ 사용자 안내문은 “업무용 방송통신기자재”에만 적용한다.
Safety
Complies with the following standard (dates and editions are cited in the
Declaration of Conformity): IEC/EN 61010-1
Acoustic statement (European Machinery Directive)
— Acoustic noise emission
— LpA <70 dB
— Operator position
— Normal operation mode per ISO 7779
Declaration of Conformity
A declaration of conformity is available upon request, or a copy is available on the
Keysight Technologies web site at https://regulations.about.keysight.com/DoC/
사 용 자 안 내 문
Keysight Support, Services, and Assistance
User's Guide N5252-90002
41
Service and Support Options
The N5252A system has a one-year return-to-Keysight warranty. Three-year and five-year
warranties are available.
Contact Keysight for service (see "Contacting Keysight" below). The N5252A system is
calibrated by the customer using the N5262AC12 Calibration Kit that comes with the system.
Only a functional certificate is provided.
The VDI extenders are to be returned in the Pelican case.
Contacting Keysight
Assistance with test and measurements needs and information or finding a local Keysight
office are available on the Internet at http://www.keysight.com/find/assist
You can also purchase accessories or documentation items on the Internet at
http://www.keysight.com/find
If you do not have access to the Internet, please contact your Keysight field engineer.
In any correspondence or telephone conversation, refer to the
Keysight product by its model number and full serial number. With
this information, the Keysight representative can determine whether
your product is still within its warranty period.
This information is subject to change without notice.
© Keysight Technologies 2018, 2019
Print Date: January 2019
Supersedes: December 2018
www.keysight.com
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