Keysight Technologies 8710 Series Service manual

Keysight 8710x Low PIM
Coaxial Multiport Switches
Operating and
Service Manual

Keysight 8710x Operating and Service Manual 1

2 Keysight 8710x Operating and Service Manual
Notices
© Keysight Technologies 2014
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tronic storage and retrieval or translation
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and international copyright laws.
Manual Part Number
87104-80017
Edition
Edition 2, October 2014
Published by Keysight Technologies
Printed in Malaysia
Keysight Technologies Sdn. Bhd.
Phase 3 Bayan Lepas Free Industrial Zone
Bayan Lepas, Penang 11900 Malaysia
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CAUTION
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tions are fully understood and
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Certification
Keysight Technologies certifies that this
product met its published specifications at
the time of shipment from the factory. Key-
sight Technologies further certifies that its
calibration measurements are traceable to
the United States National Institute of Stan-
dards and Technology (NIST, formerly NBS),
to the extend allowed by the Institute’s cali-
bration facility, and to the calibration facili-
ties of the other International Standards
Organization members.

Keysight 8710x Operating and Service Manual 3
WEEE Compliance
This product complies with the WEEE Directive (2002/96/EC)
marking requirements. The affixed label indicates that you must
not discard this electrical/electronic product in domestic household
waste.
Product Category: With reference to the equipment types in the
WEEE Directive Annex I, this product is classed as a "Monitoring
and Control Instrumentation" product.
Do not dispose in domestic household waste.
To return unwanted products, contact your local Keysight office, or
see www.keysight.com for more information.

4 Keysight 8710x Operating and Service Manual
Contacting Keysight
For more information, please contact your nearest Keysight office.
Or, go to www.keysight.com/find/assist for more information.
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www.keysight.com/find/contactus

Keysight 8710x Operating and Service Manual 5
Contents
1 Introduction 7
General Information 8
Key Features 9
2 Switch Configuration 11
Driving the Switch 12
Standard Drive 13
TTL Drive (Option T24) 14
Electronic Position Indicators 15
3 Specifications 17
General Specifications 18
Supplemental specifications (cold switching) 18
RF Specifications 20
Indicator Specifications 21
Switch Drive Specifications 22
TTL drive (option T24) 22
Environmental Specifications 23
Physical Specifications 24
4 Installation and Verification 25
Installation 26
Initial inspection 26
Operating and Service Instructions 27

6 Keysight 8710x Operating and Service Manual
Contents
Operator’s check 27
Performance test 28
Service instructions 28

Keysight 8710x Low PIM Coaxial Multiport Switches
Operating and Service Manual
1
Introduction
General Information 8
Key Features 9
This chapter provides you the overview of Keysight 8710x
low PIM coaxial multiport switches.

8 Keysight 8710x Operating and Service Manual
1 Introduction
General Information
Keysight 87104P/Q/R SP4T and 87106P/Q/R SP6T terminated
switches provide the life and reliability required for automated test
and measurement and signal monitoring and routing applications.
These switches can be used in various applications as they are
available in multiple frequency ranges, up to 26.5 GHz.
Innovative design and careful process control create switches that
meet the requirements for highly repeatable switching elements in
test instruments and switching interfaces. The exceptional 0.03 dB
insertion loss repeatability is warranted for 3 million cycles at
25 °C. This reduces sources of random errors in the measurement
path and improves measurement uncertainty. Switch life is a
critical consideration in production test systems, satellite and
antenna monitoring systems, and test instrumentation. The
longevity of these switches increases system uptime and lowers the
cost of ownership by reducing calibration cycles and switch
maintenance.
Figure 1-1 Keysight 8710x Low PIM Coaxial Multiport Switches

Introduction 1
Keysight 8710x Operating and Service Manual 9
Key Features
•SP4T and SP6T configurations
•Magnetic latching
•Guaranteed repeatability of 0.03 dB up to 3 million cycles,
ensuring accurate system measurements and reducing
calibration intervals
•Excellent isolation, typically > 90 dB at 26.5 GHz
•PIM level (typical) of –165 dBc
•Opto-electronic indicators and interrupts
•Terminated ports
Table 1- 1 List of Keysight 8710x Low PIM Coaxial Multiport Switches
Model number Frequency range Configuration
87104P DC to 4 GHz SP4T
87104Q DC to 20 GHz SP4T
87104R DC to 26.5 GHz SP4T
87106P DC to 4 GHz SP6T
87106Q DC to 20 GHz SP6T
87106R DC to 26.5 GHz SP6T

10 Keysight 8710x Operating and Service Manual
1 Introduction
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Keysight 8710x Low PIM Coaxial Multiport Switches
Operating and Service Manual
2
Switch Configuration
Driving the Switch 12
Standard Drive 13
TTL Drive (Option T24) 14
Electronic Position Indicators 15
This chapter provides you information on how to drive the
switches using standard drive and TTL drive. Also included
is the configuration to utilize the function of the position
indicator.

12 Keysight 8710x Operating and Service Manual
2 Switch Configuration
Driving the Switch
Each RF path can be closed by applying ground (TTL “High” for
Option T24) to the corresponding “drive” pin. In general, all other RF
paths are simultaneously opened by internal logic. See Figure 2-1 for
drive connection diagrams.
The default operation of the switches is break-before-make.
Make-before-break switching can be accomplished by
simultaneously selecting the “drive” pins for old RF path and new
RF path. Once the new RF path is closed (15 ms), de-select the
old RF path “drive” pin while leaving the new RF path “drive” pin
selected. The switch circuitry will automatically open the old RF
path while leaving the new RF path engaged.
Figure 2-1 Drive connection diagrams for Option 161 and Option 100
Drive Sense
Common
ground
Ind. Comm.
Ind. 1
Ind. 2
Ind. 3
Ind. 4
Ind. 5
Ind. 6
+24 Vdc
*Path 1
Path 2
Path 3
*Path 4
Path 5
Path 6
10
12
14
2
4
6
8
15
1
3
5
7
9
11
13
15 16
Common Ground (Green - 15)
Indicator Path 6 (Yellow - 14)
Drive Path 5 (Brown - 11)
Indicator Path 4 (Black - 10)
Indicator Path 3 (Gray - 8)
Drive Path 2 (Green - 5)
Indicator Path 1 (Yellow - 4)
** Open all paths (Blue - 16)
Drive Path 3 (Violet - 7)
Drive Path 6 (Orange - 13)
Indicator Path 5 (Red - 12)
*Drive Path 4 (White - 9)
Indicator Path 2 (Blue - 6)
*Drive Path 1 (Orange - 3)
Indicator Common (Red - 2)
Drive Common (Brown - 1)
Drive Sense
Ind. comm.
Open all paths
+24 Vdc
*Path 1
Path 2
Path 3
*Path 4
Path 5
Path 6
Common Ground
12
Ind. 1
34
Ind. 2
56
Ind. 3
78
Ind. 4
910
Ind. 5
11 12
Ind. 6
13 14
Switch connector (Option 161)
Mating cable connector
15 16
12
Solder terminal (Option 100)
* Path1 and path 4 are not connected for 87104A/B/0C/D
** “Open all paths pin is not available for option 100

Switch Configuration 2
Keysight 8710x Operating and Service Manual 13
Standard Drive
1Connect pin 1 to supply voltage (+20 Vdc to +32 Vdc) and pin
15 to ground.
2Select (close) desired RF path by applying ground to the
corresponding “drive” pin; for example ground pin 3 to close RF
path 1.
3To select another RF path, ensure that all unwanted RF path
“drive” pins are disconnected from ground (to prevent multiple
RF path engagement). Ground the “drive” pin which corresponds
to the desired RF path.
4To open all RF paths, ensure that all RF path “drive” pins are
disconnected from ground. Then, connect pin 16 to ground. This
feature is not available in option 100.
NOTE
Pin 15 must always be connected to ground to enable the electronic
position-indicating circuitry and drive logic circuitry.
CAUTION
If pin 15 is not connected to power supply ground, catastrophic failure will
occur.
NOTE
After the RF path is switched and latched, the drive current is interrupted by the
electronic position-sensing circuitry. Pulsed control is not necessary, but if
implemented, the pulse width must be 15 ms minimum to ensure the switch is
fully latched.

14 Keysight 8710x Operating and Service Manual
2 Switch Configuration
TTL Drive (Option T24)
1Connect pin 1 to supply voltage (+20 Vdc to +32 Vdc) and pin
15 to ground.
2Select (close) desired RF path by applying TTL “High” to the
corresponding “drive” pin; for example apply TTL “High” to pin
3 to close RF path 1.
3To select another RF path, ensure that all unwanted RF path
“drive” pins are at TTL “Low” (to prevent multiple RF path
engagement). Apply TTL “High” to the “drive” pin which
corresponds to the desired RF path.
4To open all RF paths, ensure that all RF path “drive” pins are
at TTL “Low”. Then, apply TTL “High” to pin. This feature is not
available in option 100.
NOTE
Pin 15 must always be connected to ground to enable the electronic
position-indicating circuitry and drive logic circuitry.
In addition to the quiescent current supplying the electronic position-sensing
circuitry, the drive current flows out of pin 15 (during switching) on TTL drive
switches (option T24).
CAUTION
If pin 15 is not connected to power supply ground, catastrophic failure will
occur.
NOTE
After the RF path is switched and latched, the drive current is interrupted by the
electronic position-sensing circuitry. Pulsed control is not necessary, but if
implemented, the pulse width must be 15 ms minimum to ensure the switch is
fully latched.

Switch Configuration 2
Keysight 8710x Operating and Service Manual 15
Electronic Position Indicators
The electronic position indicators consist of optically isolated, solid
state relays which are driven by photo-electric sensors coupled to the
mechanical position of the RF path’s moving elements (see Figure 2-2).
The circuitry consists of a common which can be connected to an
output corresponding to each RF path. If multiple RF paths are
engaged, the position indicator corresponding to each closed RF path
will be connected to common. The solid state relays are configured for
AC and/or DC operation. See “Indicator Specifications” on page 21.
The electronic position indicators require that the supply (20 to 32
VDC) be connected to pin 1 and ground connected to pin 15.
Figure 2-2 Pin configuration for indicator function
s
s
s
s
s
s
PIN NUMBER FUNCTION
2
4
6
8
10
12
14
COMMON
PATH 1
PATH 2
PATH 3
PATH 4
PATH 5
PATH 6
*
*
* Path 1 and 4 are not connected for 87104A/B/C/D
* Paths 1 and 4 are not connected for 87104P/Q/R

16 Keysight 8710x Operating and Service Manual
2 Switch Configuration
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Keysight 8710x Low PIM Coaxial Multiport Switches
Operating and Service Manual
3
Specifications
General Specifications 18
Supplemental specifications (cold switching) 18
RF Specifications 20
Indicator Specifications 21
Switch Drive Specifications 22
TTL drive (option T24) 22
Environmental Specifications 23
Physical Specifications 24
This chapter provides the specifications of the switches.
Specifications refer to the performance standards or limits
against which the coaxial multiport switches are tested.
Typical characteristics are included for additional
information only and they are not specifications. These are
denoted as “typical”, “nominal”, or “approximate” and are
printed in italics.

18 Keysight 8710x Operating and Service Manual
3 Specifications
General Specifications
Supplemental specifications (cold switching)
Figure 3-3 illustrates the maximum incident CW power (cold
switching) from 100 MHz to 26.5 GHz. The reference conditions are as
below:
•Cold switching only (NO hot switching)
•Ambient temperature of 75 °C or less
•Sea level (0.88 derating at 15,000 feet)
•Low VSWR < 1.2 (See Figure 3-4 for derating above 1.2 VSWR)
Keysight model number 87104P/Q/R and 87106P/Q/R
Maximum power rating 1 watt average into 50 Ωinternal loads
Hot switching 1 watt CW
50 W peak, 10 μs max pulse width, not to exceed 1 W
average.
Cold switching See “Supplemental specifications (cold switching)”
Life 3,000,000 cycles minimum
Switching speed 15 ms maximum