6
Attenuators
46
Programmable and Manual Step
Agilent 8494/95/96/97 series
This family of manual step attenuators offers fast, precise
signal-level control in three frequency ranges, dc to 4 GHz,
dc to 18 GHz, and dc to 26.5 GHz. They feature exceptional
repeatability and reliability in a wide range of frequency,
attenuation, and connector options.
Attenuation repeatability is specified to be less than 0.03 dB
(0.05 dB, 18 to 26.5 GHz) for 5 million cycles per section. This
assures low-measurement uncertainty when designed into
automatic test systems. Electromechanical step attenuators
offer low SWR, low-insertion loss, and high-accuracy required
by high-performance test and measurement equipment.
Precision-plated, leaf-spring contacts insert/remove attenuator
sections (miniature tantalum nitride thin-film T-pads on sapphire
and alumina substrates) from the signal path. Unique process
controls and material selection ensure unmatched life and
contact repeatability.
Programmable models
Miniature drive solenoids in the programmable models keep
switching time, including settling, down to less than 20 milli-
seconds. Once switched, strong permanent magnets hold the
solenoids (and attenuation value) in place. Current interrupts
automatically disconnect solenoid current, simplifying driver
circuit design, and minimizing heat dissipation. Programming is
done through a 12-pin Viking socket or optional ribbon cables
with DIP plugs. Automatic drive control is easy using the GPIB
compatible Agilent 11713A or 87130A attenuator/switch driver
and an external controller.
Programmable driver instruments
Programmable drive options for step attenuators include the
Agilent 11713A attenuator/switch driver, which permits
users to easily integrate the attenuator into GPIB compatible
automatic test systems. Also, see page 179 for product
descriptions of the Agilent 87130A and 70611A (MMS)
attenuator/switch drivers.
Interconnect cable selections include various connector and
ribbon cable configurations to match user applications.
Standard interconnect cables are described in the Attenuator
Cables table on page 53.
Manual models
These models provide excellent performance with the simplicity
and convenience of positive manual switching. A low-torque
camshaft activates the insertion and removal of the attenuation
sections. Positive detents and an attenuation-level indicator
ensures quick and accurate control.
Attenuator interconnecting kits
To achieve 1 dB step resolution up to 81 dB, 101 dB or 121 dB,
combine the Agilent 8494 with 8495/96/97 using the Agilent
11716A,B,C interconnect kits to cascade attenuators in series.
(196 Seiten)
Manymanuals.com
Manymanuals.de
Manymanuals.fr
Manymanuals.it
Manymanuals.pl
Manymanuals.cz
Manymanuals.es
Manymanuals-pt.com
Kommentare zu diesen Handbüchern