11730D AGILENT TECHNOLOGIES, 11730D Datasheet - Page 101

• Manufacturer Part Number: 11730D
• Description: SENSOR CABLE, 50FT
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 11730D

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Cable Length: 50ft
• Features: Reduces RFI Effect On Low Power Readings With Improved Shielding Design
• Cable Assembly Type: Sensor
• Cable Color: Gray
• Rohs Compliant: No
• For Use With: 8480 & E-Series Power Sensors
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

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Switches
Switches
Applications
RF/microwave switches find use in a wide variety of signal routing
applications for test and measurement systems. Typical
applications include:
• Selection of multiple signal sources to one output
• Selection of multiple input signals to one
• Transfer switching to insert or remove a device in a signal path
• Matrix switching of multiple inputs and outputs
Technology
Agilent electromechanical coaxial switches feature low insertion
loss, high isolation, broadband performance, long life and
exceptional repeatability. Agilent coaxial switches are all designed
with an “edge-line” coaxial structure. This transmission line
structure provides for movement of the edge-line center conductor
between two fixed, continuous ground planes. The main
advantage of this innovation is that the moving contacts can be
easily activated, yet maintain high isolation and low insertion loss.
The RF contact configuration is designed for controlled wiping
action. Since the outer conductor is not part of the switching
function, repeatability and life are enhanced. The switching
action occurs typically within 15 to 30 milliseconds, after which
permanent magnets latch the contacts to retain the new
switch position.
The Agilent 87104/106 and 87204/206 series of switches use
optoelectronic sensing to provide the coil current interrupt
function. Since no mechanical contacts are involved in this
function, the switch reliability is improved.
Key specifications
• Frequency range
• Input power
• Insertion loss
• Isolation
• SWR
• Repeatability
• Life
measurement instrument
Frequency range
One of the main advantages of electromechanical switches is that
they transmit signals all the way down to DC. The top frequency
limits are set by the size of the coaxial structure and connectors.
Various Agilent models are available up to 50 GHz. Parameters
such as insertion loss, isolation and SWR behave in a predictable
manner. Typically, these parameters will linearly degrade at
higher frequencies.
Input power
The ability of a switch to handle power depends very much on the
materials used for the signal carrying components of the switch
and on the switch design. Two switching conditions should be
considered: “hot” switching and “cold” switching. Hot switching
occurs when RF/microwave power is present at the ports of the
switch at the time of the switching function. Cold switching
occurs when the signal power is removed before activating the
switching function.
Hot switching causes the most stress on internal contacts, and can
lead to premature failure. Cold switching results in lower contact
stress and longer life, and is recommended in situations where the
signal power can be removed before switching.
Insertion loss
Insertion loss for electromechanical switches is very low, ranging
from 0.1 dB at low frequencies to 1.5 dB at high frequencies. This
performance distinguishes them from solid-state switches which
range from 0.5 dB to 6 dB. Factors that influence loss are: path
length, types of material used on signal carrying surfaces, contact
wear, corrosion or other contamination. Insertion loss can play an
important role whether high or low power is present. In high-
power systems, this additional loss may require that the source
power be increased to compensate. In receiver applications, the
effective sensitivity of the system is reduced by the amount of
insertion loss. In other systems, additional power may not be
available, due to the prohibitive cost of supplying more power.