Keysight Technologies 34941A User manual

[phone] | [email protected] | artisantg.com
-~
ARTISAN
®
~I
TECHNOLOGY
GROUP
Your definitive source
for
quality
pre-owned
equipment.
Artisan Technology
Group
Full-service,
independent
repair
center
with
experienced
engineers
and
technicians
on staff.
We
buy
your
excess,
underutilized,
and
idle
equipment
along
with
credit
for
buybacks
and
trade-ins
.
Custom
engineering
so
your
equipment
works
exactly as
you
specify.
•
Critical
and
expedited
services
•
Leasing
/
Rentals/
Demos
• In
stock/
Ready-to-ship
•
!TAR-certified
secure
asset
solutions
Expert
team
ITrust
guarantee
I
100%
satisfaction
All
tr
ademarks,
br
a
nd
names, a
nd
br
a
nd
s a
pp
earing here
in
are
th
e property of
th
e
ir
r
es
pecti
ve
ow
ner
s.
Find the Keysight / Agilent 34921T at our website: Click HERE

Keysight 34941A-34942A
RF Multiplexer Modules
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.
User’s Guide

2 Keysight 34941A-34942A User’s Guide
Notices
Copyright Notice
© Keysight Technologies 2008-2019
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 as governed by
United States and international
copyright laws.
Trademarks
Microsoft® and Windows® are U.S.
registered trademarks of Microsoft
Corporation.
Manual Part Number
34980-90041
Edition
Edition 3, July 2019
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. Go to http://www.keysight.com/
go/conformity. You can then search by
product number to find the latest
Declaration of Conformity.
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), a copy of which can be found
at http://www.keysight.com/find/
sweula. The license set forth in the
EULA represents the exclusive authority
by which the U.S. government may use,
modify, distribute, or disclose the
Software. The EULA and the license set
forth therein, does not require or
permit, among other things, that
Keysight: (1) Furnish technical
information related to commercial
computer software or 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,
perform, display, or disclose
commercial computer software or
commercial computer software
documentation. No additional
government requirements beyond
those set forth in the EULA shall apply,
except to the extent that those terms,
rights, or licenses are explicitly required
from all providers of commercial
computer software pursuant to the FAR
and the DFARS and are set forth
specifically in writing elsewhere in the
EULA. 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.
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
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
proceed beyond a CAUTION notice
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,
could result in personal injury or death.
Do not proceed beyond a WARNING
notice until the indicated conditions are
fully understood and met.

Keysight 34941A-34942A User’s Guide 3
Safety Symbols
The following symbols on the instrument and in the documentation indicate
precautions which must be taken to maintain safe operation of the instrument.
Alternating current (AC) Frame or chassis (ground) terminal
Standby supply. Unit is not completely
disconnected from ac mains when
switch is off
Caution, risk of electric shock
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)

4 Keysight 34941A-34942A User’s Guide
Additional Safety Notices
The following general safety precautions must be observed during all phases of
operation of this instrument. Failure to comply with these precautions or with
specific warnings or instructions elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability of the customer’s failure to comply with the
requirements.
General
Do not use this products in any manner not specified by the manufacturer. The
protective features of this product may be impaired if it is used in a manner not
specified in the operation instructions.
Before Applying Power
Verify that all safety precautions are taken. Make all connections to the unit before
applying power.
Ground the Instrument
This product is provided with protective earth terminals. To minimize shock
hazard, the instrument must be connected to the ac power mains through a
grounded power cable, with the ground wire firmly connected to an electrical
ground (safety ground) at the power outlet. Any interruption of the protective
(grounding) conductor or disconnection of the protective earth terminal will cause
a potential shock hazard that could result in personal injury.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes.

Keysight 34941A-34942A User’s Guide 5
Do Not Remove the Instrument Cover
Only qualified, service-trained personal who are aware of the hazards involved
should remove instrument covers. Always disconnect the power cable and any
external circuits before removing the instrument cover.
Do Not Modify the Instrument
Do not install substitute parts or perform any unauthorized modification to the
product. Return the product to an Keysight Sales and Service Office for service
and repair to ensure that safety features are maintained.
In Case of Damage
Instruments that appear damaged or defective should be made inoperative and
secured against unintended operation until they can be repaired by qualified
service personnel.

6 Keysight 34941A-34942A User’s Guide
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.
To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
–www.keysight.com/find/xxxxx
(product-specific information and support, software and
documentation updates)
–www.keysight.com/find/assist
(worldwide contact information for repair and service)

Keysight 34941A-34942A User’s Guide 7
Table of Contents
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Additional Safety Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Before Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Ground the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Do Not Operate in an Explosive Atmosphere . . . . . . . . . . . . . . . . . . .4
Do Not Remove the Instrument Cover . . . . . . . . . . . . . . . . . . . . . . . .5
Do Not Modify the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
In Case of Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Waste Electrical and Electronic Equipment (WEEE) Directive
2002/96/EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
RF Multiplexer Switch Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operating Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
34941A and 34942A SCPI Programming Examples . . . . . . . . . . . . . . .12
34941A and 34942A Simplified Schematic . . . . . . . . . . . . . . . . . . . . . .14

8 Keysight 34941A-34942A User’s Guide
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

Keysight 34941A-34942A User’s Guide 9
RF Multiplexer Switch Modules
This User’s Guide covers the following two plug-in modules for the Keysight
34980A Multifunction Switch/Measure Unit:
These modules provide high density radio frequency (RF) signal switching, with
four independent 1x4 multiplexer banks in each module.
Both modules contain four banks of latching switches. Each bank consists of three
Form C relays (see the simplified schematic on page 14). To create a larger
switching configuration, you can connect the banks in this module and connect to
banks in other RF MUX modules. For example, you can create up to 1x97 RF MUX
in a single 34980A mainframe.
The important differences between the two RF MUX modules lie in their
characteristic impedance and their use of connectors (external cables are not
provided with the module):
– The 34941A — the 50-Ωversion — uses SMA connectors.
When installing SMA cables on the 34941A module, it is recommend that you
tighten them to 0.8 - 1.1 Nm (7-10 in-lbs) of torque.
– The 34942A — the 75-Ωvariation — uses Mini SMB connectors.
34941A Quad 1x4 50Ω3GHz RF multiplexer
34942A Quad 1x4 75Ω 1.5GHz RF multiplexer
CAUTION
SMA connectors are easily damaged, especially when tightening a
neighboring connector with a wrench. To help prevent damage and
contamination, do not remove a connector's protective cap until immediately
prior to installing a cable on that connector.
NOTE
For the 34942A, it is recommended that you use gold-plated straight plug
connectors (75ΩMiniature SMB). Because of the space constraints between
connectors on this module, right-angle plugs and SMB adapters are not
recommended.

10 Keysight 34941A-34942A User’s Guide
Operating Considerations
Electrical Considerations
See the Introduction to the Plug In Modules chapter of the 34980A Mainframe
User’s Guide for detailed environmental operating conditions for the 34980A
mainframe and its installed modules. That guidance sets maximum per channel
current and power ratings at rated voltage for pollution degree 1 (dry) and
pollution degree 2 (possible condensation) conditions, for each of the GP
modules.
Signal Connections
The RF MUX modules do not connect to the analog buses. Instead, all signal
connections are made through the visible connectors via external cables. Each
visible connector on an RF MUX module is labeled with a number (11 through 44),
that represents a channel you can close programmatically from the front panel or
with using the Web Browser Interface. When you close a channel on the RF MUX
modules you automatically close all relays that create a direct path to the
Common of a bank.
Channel Relay Operation
With RF MUX switches, you cannot open switches programmatically. You can only
close a channel. When you close one channel, another channel automatically
opens. Therefore, only one channel relay in each bank is closed at any time.

Keysight 34941A-34942A User’s Guide 11
Electrical Isolation
You can configure each bank on the RF MUX modules to be either isolated or
chassis-grounded. The modules come with chassis-grounded metal shoulder
washers installed on all connectors in each bank of relays. If you want to isolate a
bank from the other banks and from chassis-ground, you must remove the five
metal washers in that bank and replace them with the provided plastic shoulder
washers.
To isolate a bank from other
banks and chassis-ground,
install the provided plastic
shoulder washers on the
connectors in the bank to be
isolated. When installing the
plastic shoulder washers, use
7 in-lbs of torque.
The 34941A and 34942A are
shipped from the factory
chassis-grounded with metal
shoulder washers installed on all
connectors in each bank of relays.

12 Keysight 34941A-34942A User’s Guide
34941A and 34942A SCPI Programming Examples
The programming examples below provide you with SCPI command examples to
use for actions specific to the RF MUX switch modules.
The slot and channel addressing scheme used in these examples follow the form
sccc where sis the mainframe slot number (1 through 8) and ccc is the channel
number. For information on specific configurations, refer to the simplified
schematic on page 14.
For complete information on the SCPI commands used to program the 34980A,
refer to the Keysight 34980A Programmer’s Reference which can be downloaded
from www.keysight.com/find/34980A.
Example: Closing channels You can only close channels on the RF MUX
modules. When you close a channel, any already-closed channels open
automatically. The relays switch in sequence to avoid momentary connection of
the wrong input to the multiplexer output. The following command closes channel
03 on Bank 1 of an RF MUX module in slot 5.
ROUTe:CLOSe (@5103)
Example: Querying channels for open or close state The following
commands returns the close or open state of channel 33 of a module in slot 5.
ROUT:CLOSe? (@5033)
ROUT:OPEN? (@5033)
Example: Querying the system for module identify The following command
returns the identify of the module installed in slot 7.
SYSTem:CTYPe? 7
Example: Reading the cycle count for a relay On these modules, each bank
consists of two leaf relays and one tree relay (see the simplified schematic on
page 14). The module stores the cycle count for each of the three relays on all four
banks. The cycle count is the greater of the three values on the specified bank
(i.e., reflecting the cycle count for the entire bank). Therefore, the count for
Channels 101, 102, 103, and 104 will always be equal. The following statement
reads back the number of completed cycles for the channels 101 and 202 on a
module installed in slot 6.
DIAGnostic:RELay:CYCLes? (@6101,6202)

Keysight 34941A-34942A User’s Guide 13
Example: Clearing the cycle count for a relay The following command resets
the cycle count on the channels 103 and 201 for a module in slot 1.
Note that clearing the cycle count on a specific channel will clear the count on all
three relays in the corresponding bank.
DIAGnostic:RELay:CYCLes:CLEar (@1103,1201)
Example: Resetting module to power-on state The following command
resets a module in slot 4 to its power-on state.
SYSTem:CPON 4

14 Keysight 34941A-34942A User’s Guide
34941A and 34942A Simplified Schematic
Both the 34941A and 34942A modules are configured alike. Each contains four
banks of latching switches. Each bank consists of three Form C relays.
The front panel of the two RF MUX modules are similar with channel labels in the
same positions, the unique product number on the left, and the product
description on the right.
Bank 1 Bank 2
Bank 3 Bank 4

Keysight 34941A-34942A User’s Guide 15
Index
C
channel relays ,10
connectors,9
D
description ,9
E
electrical isolation ,11
G
grounding ,11
M
mini SMB connectors ,9
module descriptions,9
module impedance
34941A,9
34942A,9
P
programming examples ,12
R
relay operation ,10
S
safety notices ,4
simplified schematics,14
SMA connectors,9

16 Keysight 34941A-34942A User’s Guide
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.

This information is subject to change
without notice. Always refer to the
Keysight website for the latest
revision.
© Keysight Technologies 2008-2019
Edition 3, July 2019
Printed in Malaysia
*34980-90041*
34980-90041
www.keysight.com

Artisan Technology Group is an independent supplier of quality pre-owned equipment
Gold-standard solutions
Extend the life of your critical industrial,
commercial, and military systems
with our
superior service and support.
We buy equipment
Planning to upgrade your current
equipment? Have surplus equipment taking
up shelf space? We'll give it a
new home.
Learn more!
Visit us at artisantg.com for more info
on price quotes, drivers, technical
specifications, manuals, and documentation.
Artisan Scientific Corporation dba Artisan Technology Group is not an affiliate, representative, or authorized distributor for any manufacturer listed herein.
We're here to make your life easier. How can we help you today?
[phone] [e-mail] Iartisantg.com