11730D AGILENT TECHNOLOGIES, 11730D Datasheet - Page 44

• 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

Repeatability
Fixed attenuators are often used as standards of reference in
microwave measurements. Therefore, the accuracy of the
measurement depends not only on the reference accuracy but on
the repeatability of the insertion processes. Typical production test
situations might require hundreds of connects/disconnects per
day. So, measurement repeatability depends strongly on the
connectors used. Agilent attenuators use precision type-N and
APC-7 connectors, with repeatability that exceeds the
International Electrotechnical Commission (IEC) standard for 7 mm
connectors. For higher frequencies, Agilent uses 3.5 mm
connectors that are fully SMA compatible, but are more rugged
and repeatable than SMA. For applications to 50 GHz, Agilent
uses 2.4 mm connectors that also have larger mating surfaces for
rugged and repeatable connections. Design verification testing of
3.5 mm connectors showed virtually no test deterioration even
after 1000 connections. For step attenuators, the repeatability of
the internal RF connections is also of concern. Agilent uses an
“edgeline” transmission line structure in which the outer
conductor is a continuous ground plane and only the center
conductor is switched to insert or remove an attenuation step.
Keys to achieving long-term repeatability include precision control
of all dimensions that affect contact pressure, careful selection
and control of plating processes, and careful monitoring and
control of the assembly process. The result is a step attenuator
with repeatability specified at 0.03 dB maximum over 5 million
cycles per section.
Life
The life of step attenuators is usually specified in cycles; i.e., the
number of times a given attenuator section switches from one
position to another and back. Agilent determines life by cycling
attenuators to the point of degradation. Typically, Agilent
attenuators in life cycle tests perform to specification for at least
twice as many cycles as warranted. Agilent step attenuator
families have a specified life of 5 million cycles per section. This
long life results in lower cost of ownership by reducing periodic
maintenance, downtime, and repairs.
Figure 2. Guardband example.
Figure 1. Accuracy traceability example.
21.0
20.8
20.6
20.4
20.2
20.0
19.8
19.6
19.4
19.2
19.0
–0.03
–0.06
–0.09
–0.12
–0.15
0.15
0.12
0.09
0.06
0.03
www.agilent.com/find/mta
0
specification
Published
Agilent
reference
standard
calibrated
by NIST
±0.03 dB
Uncertainty in
transfer accuracy
±1 dB
Agilent production
specification
Agilent
calibration
laboratory
standard
±0.8 dB
±0.10 dB
Guardband
Attenuators (continued)
Attenuators
Attenuators
Agilent
production
test standard
performance
±0.15 dB
±0.5 dB
Typical
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