Keysight Technologies 87406B Installation guide

Keysight Technologies
87406B Coaxial Matrix Switch
DC to 20 GHz
Technical Overview

Modern automated test systems demand
higher accuracy and performance than
ever before. The Keysight Technologies, Inc.
87406B matrix switch offers improvements
in insertion loss repeatability and isolation
necessary to achieve higher test system
performance. Long life, excellent repeat-
ability, and high reliability lowers the
cost of ownership by reducing calibration
cycles and increasing test system uptime
that are vital to ATS measurement system
integrity.
Description
The 87406B matrix switch provides the
life and reliability required for automated
test and measurement, signal monitoring,
and routing applications. Innovative design
and careful process control creates a
switch that meets the requirements for
highly repeatable switching elements in
test instruments and switching interfaces.
The switch is designed to operate for more
than 10 million cycles and will meet all
electrical specications for at least
5 million cycles.
High Performance
Matrix Switch for RF and
Microwave Test Systems
– 3 x 3, 2 x 4, and 1 x 5 blocking matrix
congurations
– Magnetic latching
– Make-before-break or break-before-
make operation
– Operating life of 10 million cycles,
typical
– Repeatability of 0.03 dB up to
5 million cycles
– Excellent isolation,
typically > 100 dB at 20 GHz
– Opto-electronic indicators and
interrupts
– Terminated ports
– TTL/5V CMOS compatible (optional)
The switch exhibits exceptional insertion
loss repeatability. 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 the
switch increases system uptime, and
lowers the cost of ownership by reducing
calibration cycles and switch maintenance.
Operating to 20 GHz, this switch exhibits
the exceptional isolation performance
required to maintain measurement integrity.
Isolation between ports is typically > 100 dB
to 20 GHz. This reduces the inuence of
signals from other channels, sustains the
integrity of the measured signal, and
reduces system measurement uncertainties.
This switch also minimizes measurement
uncertainty with low insertion loss and
reection, which makes it an ideal element
in large, multi-tiered switching systems.
The 87406B is designed to fall within most
popular industry footprints. The 2¼ inch
square ange provides mounting holes,
while the rest of the 2½ inch long by 2¼
inch diameter body will easily t into most
systems. Ribbon cable or optional solder
terminal connections accommodate the
need for secure and efcient control
cable attachment. Option 100 provides
solder terminal connections in place of
the 16-pin ribbon drive cable. Option 100
does not incorporate the “open all paths”
feature.
Opto-electronic interrupts and indicators
improve reliability and extend the life of
the switch by eliminating DC circuit contact
failures characteristic of conventional
electromechanical switches. This switch
has an interrupt circuit that provides logic
to open all but the selected ports, then
closes the selected ports and the current
to all the solenoids is then cut off. This
switch also offers independent indicators
that are controlled by optical interrupts
in the switch. The indicators provide a
connection between the indicator common
pin and the corresponding sense pin of
the selected port.
All unselected RF ports are terminated
with 50 Ωloads.
Figure 1. Keysight 87406B connection diagram and simplied schematic
(RF path 4 to 1 shown)
02 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

Applications
Matrix signal routing
Figures 2 and 3 show the 87406B
congured for blocking 2 x 4 and 3 x 3
applications. With outstanding repeatability
and life greater than 5 million cycles, these
switches enhance measurement condence
and reduce cost of ownership. In addition,
the matrix switch has the versatility to
provide single pole multiple throw signal
routing up to 1 x 5 (SP5T). For applications
requiring only single pole multiple throw
signal routing, the 87104 and 87106 series
high performance switches are recom-
mended. Information on switch drivers can
be found on page 9 of this document. For
additional information, request one of the
conguration guides listed in the Related
Literature section on page 11 of this
document.
General operation
The 87406B matrix switch consists of
6 ports which can be individually connected
via internal microwave switches to form
an RF path (see Figure 4). When control
inputs are sent to the switch, the internal
diode logic and position sensing circuitry
routes current to the appropriate solenoids
to close or open the microwave switches
based on the input state. The position
sensing circuitry utilizes opto-electronic
components to determine the position of
the individual internal microwave switches.
Each internal microwave switch has two
solenoids: one to select or close the RF
port, and one to unselect or open the
RF port.
Each solenoid requires 200 mA @ 24 VDC
nominal. The position sensing circuits serve
three purposes: to enable solenoids that
need to be switched, to interrupt the
solenoid current once the individual internal
microwave switch is closed or opened, and
to power the position indicator circuits.
The solenoid current is interrupted once
the switching solenoids are magnetically
latched. The drive current then returns to
the standby level that is required by the
opto-electronic components. When a
control input is applied, all RF ports
that have no enabling control input are
automatically opened by the internal logic
circuitry.
To congure a desired RF path, two ports
must be engaged which requires a control
input for each port to be maintained. If
the input is removed from either port, that
port will be automatically opened by the
internal logic circuitry. All of the “open”
solenoids are internally connected to pin
16 via diode logic circuitry (Option 161 and
T24 only). If no input is present at any of
the port select pins (3, 5, 7, 9, 11, 13), all
of the RF ports will be opened if pin 16 is
selected.
Input applied to port select pins (3, 5, 7, 9,
11, 13) while pin 16 is selected will override
the signal on pin 16 and close the respective
ports. On standard switches, pin 16 can be
permanently connected to ground to allow
the switch to open all RF ports at power
up (assuming no input is present at any of
the port select pins). Not available with
Options 100 or T24.
If pin 15 is not grounded, the logic circuit
will not operate as expected, and damage
to the switch will occur.
Figure 2. Matrix switch congured for a 2 x 4
blocking application (RF Path 5 to 2 shown)
Figure 3. Matrix switch congured for a 3 x 3
blocking application (RF Path 5 to 1 shown)
Solenoid
drive
Microwave
switches
Logic
circuit
Optical
position
sensing
Position
indicators
DC
control
input
RF ports
1
3
5
7
9
11
13
15
16
2
4
6
8
10
12
14
Figure 4. Keysight 87406B block diagram
03 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

Driving the Switch
RF path selection
To connect any two RF ports, apply control signal to the corresponding drive pins as
shown below.
Table 1. Keysight 87406B RF port drive pin control data (see Figure 8 for drive connection diagrams.)
RF port 6 5 4 3 2
13, 13 3, 11 3, 9 3, 7 3, 5
25, 13 5, 11 5, 9 5, 7
37, 13 7, 11 7, 9
49, 13 9, 11
511, 13
Using Table 1, select (close) the desired RF path by connecting ground (Option 024 and
Option 100) or applying TTL “High” (Option T24) to the corresponding “drive” pins.
Clear (open) RF paths by disconnecting ground (Option 024 and Option 100) or applying
TTL “Low” (Option T24) to the corresponding “drive” pins.
Example: Congure the RF path from port 2 to port 5
Using the data in Table 1, select pins 5 and 11 while ensuring no other pins are selected.
RF port 1 2 3 4 5 6 Open all*
Drive pin 3 5 7 9 11 13 16
Option 024, Option 100 U G U U G U X**
Options T24, 100 L H L L H L X**
U = Ungrounded, G = Grounded, L = TTL “Low”, H = TTL “High”, X = Don’t care
* “Open All Ports” is not available with Option 100 or Option T24.
** “Open all RF Ports” feature is overridden by port selection.
DC power connection
– Connect pin 1 to supply
(+20 VDC to +32 VDC)
– Connect pin 15 to chassis ground
to enable the electronic position-
indicating circuitry and drive logic
circuitry.
Warning: Damage to switch will occur
if pin 15 is not grounded.
04 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

Selected ports will be closed and
unselected ports will be automatically
opened by the internal logic circuits when
new port selections are made. After the RF
port is switched and magnetically latched,
the solenoid current is interrupted by the
solid-state position sensing circuitry. The
drive voltage must be maintained to avoid
RF path disconnection by the internal
logic. For this reason, pulsed drive is NOT
recommended. Use the 87606B if pulse
drive, such as used on 70611A or 87130A,
is desired.
Open all RF ports
Unselecting all RF ports and selecting Pin 16 on standard and Option T24 opens all
RF ports:
Drive pin 3 5 7 9 11 13 16
Option 024 U U U U U U G
Option T24 L L L L L L H
U = Ungrounded, G = Ground, L = TTL “Low”, H = TTL “High”
Selecting an RF port will override the “open all RF ports” for each selected port. If
desired, pin 16 can be wired directly to ground (Option 024) or TTL “High” (Option T24)
to open all RF ports at power-up.
Break-before-make
Remove the control inputs from the
undesired port, then select the desired
port. The internal logic will unselect the
old port automatically upon application
of the new port selection.
Make-before-break
Select the new RF port while maintaining
the control input on the original ports.
Allow 15 ms for the switching action to
be completed, then unselect the original
port; the original port will be automatically
disconnected by the internal logic.
05 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

Electronic position indicators
The electronic position indicators consist
of optically isolated, solid state relays
that are driven by photoelectric sensors
coupled to the mechanical position of the
RF ports moving elements (Figure 5). The
circuitry consists of a common that can be
connected to an output corresponding
to each RF port. When multiple RF ports
are engaged, the position indicator cor-
responding to each closed RF port will
be connected to common. The solid state
relays are congured for AC and/or DC
operation. (See indicator specications.)
The electronic position indicators require
that the supply (20–32 VDC) be connected
to pin 1 and ground connected to pin 15.
Specications
Specications describe the instrument’s warranted performance. Supplemental and
typical characteristics are intended to provide information useful in applying the
instrument by giving typical, but not warranted performance parameters.
Maximum power rating
Into internal termination 1 W CW
50 W peak, 10 µs max pulse width, not to exceed 1 W average
Into thru path
Hot switching 2 W CW
100 W peak, 10 µs max pulse width, not to exceed 2 W average
Life 5,000,000 cycles minimum
Switching time 15 ms maximum
Indicator specications (@ 25 °C)
Maximum withstand voltage 60 V
Maximum current capacity 150 mA
Maximum “ON” resistance 2.5 Ω
Typical “OFF” resistance 10 G Ω
Pin number Function
Common
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
2
4
6
8
10
12
14
Figure 5. Indicator function diagram
Supplemental characteristics
Insertion loss repeatability
(measured at 25 °C)
0.03 dB
Characteristic impedance 50 Ω
RF connectors SMA (f)
06 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

Specications (continued)
7.0
3.0
0.8
Maximum “on” state
Minimum “on” state
Maximum “off” state
“High”
“Low”
TTL control voltage states
(Options T24/100)
Switch drive specications
Parameter Conditions Min Nom Max Units
Supply voltage, Vcc 20 24 32 V
Switching current Vcc = 24 VDC 2001mA
Standby current (quiescent) 25 50 mA
Options T24/100
High level input 3 7 V
Low level input 0.8 V
Max high input current Vcc = Max; Vinput = 3.85 VDC 1 1.4 mA
1. 1200 mA is required for each RF port closed or open. Using “open all ports” (pin 16) will require up to 1200 mA (6 ports times 200 mA each).
See General Operation Section, page 3.
Frequency range dc to 20 GHz
Insertion loss 0.34 dB + 0.033 x frequency (GHz) maximum
Isolation 100 dB minimum to 12 GHz
80 dB minimum from 12 to 15 GHz
70 dB minimum from 15 to 20 GHz
SWR 1.21 maximum from dc to 4 GHz
1.35 maximum from 4 to 10 GHz
1.5 maximum from 10 to 15 GHz
1.7 maximum from 15 to 18 GHz
1.9 maximum from 18 to 20 GHz
07 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

15 16
Common Ground (Green–15)
Indicator Port 6 (Yellow–14)
Drive Port 5 (Brown–11)
Indicator Port 4 (Black–10)
Indicator Port 3 (Gray–8)
Drive Port 2 (Green–5)
Indicator Port 1 (Yellow–4)
* Open all ports (Blue–16)
Drive Port 3 (Violet–7)
Drive Port 6 (Orange–13)
Indicator Port 5 (Red–12)
*Drive Port 4 (White–9)
Indicator Port 2 (Blue–6)
*Drive Port 1 (Orange–3)
Indicator Common (Red–2)
Drive Common (Brown–1)
Drive Sense
Ind. comm.
Open all ports*
+24 Vdc
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
Common ground
Ind. 1
Ind. 2
Ind. 3
Ind. 4
Ind. 5
Ind. 6
Switch connector Mating cable connector
Standard/Option T24
12
34
56
78
910
11 12
13 14
15 16
12
* Open all ports pin is not available with Options 100/T24.1516Common
Figure 6. J1 connector conguration
Figure 7. Product outline Figure 8. Drive connection diagrams
Drive Sense
Common
ground
Ind. Comm.
Ind. 1
Ind. 2
Ind. 3
Ind. 4
Ind. 5
Ind. 6
+24 Vdc
Port 1
Port 2
Port 3
Port 4
Port 5
Port 6
10
12
14
2
4
6
8
15
1
3
5
7
9
11
13
Options 100
08 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

Environmental specications
Operating temperature –25 to 75 °C
Storage temperature –55 to 85 °C
Temperature cycling –55 to 85 °C, 10 cycles per MIL-STD-202F, Method 107D, Condition A (modied)
Vibration
Operating 7 g: 5 to 2000 Hz at 0.25 in p-p
Survival 20 g: 20 to 2000 Hz at 0.06 in p-p, 4 min/cycle, 4 cycles/axis
Random 2.41 g (rms) 10 min/axis
Shock
Half-sine 500 g at 0.5 ms, 3 drops/direction, 18 total
Operating 50 g at 6 ms, 6 directions
Moisture resistance 65 °C, 95% RH, 10 days per MIL-STD-202F, Method 106E
Altitude storage 50,000 feet (15,240 meters per MIL-STD-202F, Method 105C, Condition B)
RFI Per MIL-STD-461C, RE02, Part 4
Magnetic eld <5 gauss 1/4 inch from surface
Physical specications
Dimensions Per Figure 7
Weight 229 gm (0.50 lb)
Troubleshooting
Symptom Probable cause
1. Will not switch Not connected to supply
Supply < 20 V
Supply current too low
Not connected to ground
Select line not at ground (std)
TTL “Low” voltage too high (Options T24)
2. Position indicators don’t work Supply not connected
Supply < 20 VDC
Pin 15 not connected to ground
9 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

Ordering Information
Coaxial matrix switch
87406B Coaxial matrix switch DC to 20 GHz
Options
To add options to a product, use the following scheme:
Model 87406B
Model options 87406B-Opt #1
87406B-Opt #2
DC connectors (must choose one)
87406B-161 16-pin DIP with quantity (one) ribbon cable, 24” with SMA female connector
87406B-100 Solder terminals
Control Logic (must choose one)
87406B-T24 TTL and 5 V CMOS compatibility
87406B-024 24 V DC without TTL Logic
Note: Options 024 and 161 are default options for dc drive and connector.
Calibration documentation (optional)
87406B-UK6 Calibration data
Drivers
11713B/C Attenuator switch driver Drives up to 10 or 20 sections of switches or attenuators.
5061-0969 Accessory cable Viking connector to bare tinned wires (60 inches long).
Use (2) 5061-0969 to connect the 11713B/C to the 87406B Option 100 switch.
Related Literature
Publication title Pub number
Keysight 11713B/C Attenuator/Switch Drivers Conguration Guide 5989-7277EN
Keysight RF and Microwave Switch Selection Guide 5989-6031EN
Power Handling Capability of Electromechanical Switches Application Note 5989-6032EN
Coaxial Electromechanical Switches: How Operating Life and Repeatability of Keysight’s Electromechanical Switches
Minimize System Uncertainty Application Note
5989-6085EN
10 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview

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11 | Keysight | 87406B Coaxial Matrix Switch – Technical Overview
This information is subject to change without notice.
© Keysight Technologies, 2015, 2017
Published in USA, December 1, 2017
5965-7841E
www.keysight.com