6
Attenuators
39
Attenuators
Applications
Agilent fixed and step attenuators1find use in a wide variety of
applications for signal conditioning and level control.
• Reducing signal levels
• Matching impedances of sources and loads
• Measuring gain or loss of a two-port device
Key specifications
• SWR
• Accuracy
• Repeatability
• Life
SWR
Most attenuators use some form of distributed thin-film
attenuating element, designed to operate over multi-octave
ranges and for low SWR match at input and output. The SWR
characteristic is controlled with careful design of the element as
well as the transition from RF connector to the element’s
planar geometry.
When an attenuator is inserted into a test network, the
interaction of its SWR and the network SWR results in
frequency-varying mismatch, which degrades the accuracy of
the measurement. The amount of variation often exceeds the
flatness specification of the attenuator. As an example, if at a
given frequency, a 3 dB attenuator with SWR of 1.22 at each
port is inserted into a microwave network that has a source and
load SWR of 1.35, the variation from the expected 3 dB change
could be as great as ±0.5 dB. This change is due to SWR alone
and points out the importance of the SWR specification in a
precision attenuator.
Accuracy
The accuracy of an attenuator directly affects the uncertainty
of the measurement where the attenuator is used. In many
measurement and metrology applications, attenuators are the
basic standard against which other components and instruments
are calibrated.
Agilent attenuator accuracy specifications always include the
effect of frequency response. And, Agilent attenuators use
“edgeline” coaxial structure technology to achieve low-insertion
loss and SWR resulting in better accuracy.
Agilent attenuators achieve flat-frequency response and
high accuracy through the use of thin-film attenuator cards.
These cards are composed of high-stability tantalum nitride
resistive film, deposited on sapphire or alumina substrates.
Advanced design and state-of-the-art processes in the
deposition stages allow precise control of the geometry and
thus the attenuation value. The result is very flat frequency
response and greater accuracy.
Ultimate specified accuracy of RF/microwave attenuators is
limited by the accuracy to which National Institute of Standards
and Technology (NIST) can measure, plus the uncertainty of the
measurement transfer process which calibrates the production
test equipment. See Figure 1, on the next page, for an accuracy
traceability example. At Agilent, performance to specifications
is verified by fully testing each attenuator with an ATE system
including an automatic network analyzer (ANA). In turn, the ANA
is periodically calibrated using standards traceable to NIST.
Each published specification has been established using a
“specification budget” process. This process provides for
“guardbands” to account for transfer uncertainties between
NIST, Agilent Metrology Labs, and the Agilent production test
systems. Figure 2, on the next page, shows how the specification
budget is allocated.
1
See Waveguide chapter for additional products.
www.agilent.com/find/accessories
Attenuators
40
Attenuators
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
(except the Agilent 355E,F). This long life results in lower cost
of ownership by reducing periodic maintenance, downtime,
and repairs.
0.15
0.12
0.09
0.06
0.03
0
–0.03
–0.06
–0.09
–0.12
–0.15
Actual value (dB)
Uncertainty in
transfer accuracy
±0.03 dB
±0.10 dB
±0.15 dB
Agilent
reference
standard
calibrated
by NIST
Agilent
calibration
laboratory
standard
Agilent
production
test standard
Figure 1. Accuracy traceability example.
Figure 2. Guardband example.
6
21.0
20.8
20.6
20.4
20.2
20.0
19.8
Attenuation (dB)
19.6
19.4
19.2
19.0
Published
specification
±
1 dB
Agilent production
specification
±
0.8 dB
Guardband
Typical
performance
±0.5 dB
6
Attenuators
41
Fixed
Agilent 8491A/B/C, 8492A, 8493A/B/C
Agilent Technologies coaxial fixed attenuators provide precise
attenuation, flat frequency response, and low SWR over
broad frequency ranges. Attenuators are available in nominal
attenuations of 3 dB and 6 dB, as well as 10 dB increments
from 10 dB to 60 dB. These attenuators are swept-frequency
tested to ensure specification compliance at all frequencies.
Calibration points are provided on a nameplate chart attached
to each unit (except for the Agilent 8491C).
Agilent 8498A high-power attenuator
The Agilent 8498A Option 030 is designed to meet the needs of
high-power attenuation applications in the RF and microwave
frequency range. It is a 25 watt average, 30 dB fixed attenuator
with a frequency range of dc to 18 GHz. The maximum peak
power specification is 500 watts (dc to 5.8 GHz) and 125 watts
(5.8 to 18 GHz). Available only in a 30 dB version, the unit
offers a 1.3 SWR and ±1 dB accuracy at 18 GHz. Large
heat-dissipating fins keep the unit cool even under continuous
maximum input power conditions.
Agilent 8490D 50 GHz fixed attenuator
Agilent Technologies coaxial fixed attenuators have been the
standard for accurate flat response and low SWR. The Agilent
8490D offers exceptional performance to 50 GHz using the 2.4-mm
connector. Attenuation values available are 3, 6, 10, 20, 30, and
40 dB. Ideally suited for extending the range of sensitive power
meters or for use as calibration standards, these broadband
attenuators are manufactured with the same meticulous care
as their lower frequency counterparts.
Agilent 11581A, 11582A, 11583C
attenuator sets
A set of four attenuators (3, 6, 10, and 20 dB) is furnished
in a walnut accessory case. The Agilent 11581A set consists of
Agilent 8491A attenuators; the Agilent 11582A set, Agilent
8491B attenuators; the Agilent 11583A set, Agilent 8492A
attenuators; and the Agilent 11583C set, Agilent 8493C
attenuators. These sets are ideal for calibration labs or where
precise knowledge of attenuation and SWR is desired.
Agilent 86213A attenuator set
Provides a set of four, 3, 6, 10, and 20 dB, 75 ohm type-N
attenuators in a walnut accessory case (Agilent 0955-0765,
0955-0766, 0955-0767, and 0955-0768), respectively. Used
for reducing power and improving match. SWR is 1.12 to
1.3 GHz and 1.3 to 3 GHz. Attenuation accuracy is ±0.5 dB.
Agilent 8493A
Agilent 8492A
Agilent 8490D
Agilent 8498A
Agilent 8491A/B/C
www.agilent.com/find/accessories
6
Attenuators
42
Fixed
Frequency Maximum
Agilent range Maximum input
Attenuation accuracy (± dB)
model (GHz) SWR power 3 dB 6 dB 10 dB 20 dB 30 dB 40 dB 50 dB 60 dB Connectors
8491A dc to 12.4 1.2 to 8 GHz 0.3 0.3 0.5 0.5 1.0 1.5 1.5 2 N (m, f)
3 to 30 dB 1.3 to 12.4 GHz
40 to 60 dB
8491B dc to 18 1.2 to 8 GHz 0.3 0.3 to 12.4 GHz 0.6 0.6 to 12.4 GHz 1.0 1.5 1.5 2 N (m, f)
3 to 30 dB 1.3 to 12.4 GHz 0.4 to 18 GHz 1.0 to 18 GHz
40 to 60 dB 1.5 to 18 GHz
8491C dc to 18 1.2 to 8 GHz 0.3 to 12.4 GHz 0.4 to 12.4 GHz 0.6 0.6 to 12.4 GHz 1.0 ———N (m, f)
3 to 30 dB 1.3 to 12.4 GHz 0.4 to 18 GHz 0.5 to 18 GHz 1.0 to 18 GHz
1.5 to 18 GHz
8492A dc to 18 1.15 to 8 GHz 0.3 0.3 to 12.4 GHz 0.6 0.6 to 12.4 GHz 1.0 1.5 1.5 2 APC-7
3 to 30 dB 1.25 to 12.4 GHz 0.4 to 18 GHz 1.0 to 18 GHz
40 to 60 dB 1.35 to 18 GHz
8493A dc to 12.4 1.2 to 8 GHz 0.3 0.3 0.5 0.5 1.0 ———SMA (m, f)
3 to 20 dB 1.3 to 12.4 GHz
30 dB
8493B dc to 18 1.2 to 8 GHz ±0.3 dB 0.3 to 12.4 GHz 0.6 0.6 to 12.4 GHz 1.0 ———SMA (m, f)
3 to 20 dB 1.3 to 12.4 GHz 0.4 to 18 GHz 1.0 to 18 GHz
30 dB 1.5 to 18 GHz
8493C dc to 26.5 1.1 to 8 GHz 0.5 to 18 GHz 0.6 0.3 0.5 0.7 1.0 ——3.5 mm (m, f)
3 to 30 dB 1.15 to 12.4 GHz 1.0 to 26.5 GHz
40 dB 1.25 to 26.5 GHz
1
0.6 0.5 0.6 1.0 1.3
8498A dc to 18 1.15 to 8 GHz 25 W avg. —— —— 1.0 ———N (m, f)
30 dB 1.25 to 12.4 GHz 500 W peak
1.30 to 18 GHz (dc to 5.8 GHz)
125 W peak
500 W/ms
max. per pulse
(5.8 to 18 GHz)
Specifications
Specifications
Frequency
Agilent range Maximum
Option: 003 006 010 020 030 040
model (GHz) input power Atten. 3 dB 6 dB 10 dB 20 dB 30 dB 40 dB
Connectors
8490D dc to 50 1 W avg. Attenuation: M in : 0 to 50 GHz 2.5 5.4 9.4 19.2 29.2 38.2
Max: 0 to 26.5 GHz 3.9 6.9 10.9 21.3 31.3 42.5
Max: 26.5 to 50 GHz 4.8 7.8 11.3 21.7 31.7 42.5
SWR: Max: 0 to 26.5 GHz 1.15 1.15 1.15 1.15 1.15 1.08
Max: 26.5 to 40 GHz 1.25 1.25 1.25 1.25 1.25 1.15
Max: 40 to 50 GHz 1.45 1.45 1.45 1.45 1.45 1.25
2.4 mm (m, f)
1
1.27 for Option 006.
2 W avg.
100 W peak
6
Attenuators
43
Fixed
Fixed attenuator ordering information
A
8
(0.312)
7.6
(0.30)
2 Flats 180
° apart
7 (0.275) across
Dimension A
3, 6, 10, 20 dB: 27 (1.06)
30, 40 dB: 29 (1.14)
Agilent 8490D
13
(0.50)
40
(1.55)
19
(0.75)
A
8
(0.312)
8
(0.312)
2 Flats 180°
apart
6.4 (0.25) across
8
(0.312)
Dimension A
3, 6, 10, 20 dB: 33.8 (1.330)
30, 40 dB: 36.8 (1.450)
Agilent 8493C
Agilent 8493A,B
Dimensions are in mm (inches) nominal, unless otherwise specified.
Agilent 849 Option Option
0D: dc to 50 GHz 003: 3 dB UK6: Commercial calibration
1A: dc to 12.4 GHz 006: 6 dB test data with certificate
1B: dc to 18 GHz 010: 10 dB
1C: dc to 18 GHz 020: 20 dB
UKS: Commercial calibration certificate
2A: dc to 18 GHz 030: 30 dB
3A: dc to 12.4 GHz 040: 40 dB
2
3B: dc to 18 GHz 050: 50 dB
2
3C: dc to 26.5 GHz 060: 60 dB
2
8A: dc to 18 GHz
Agilent 8490/91/92/93/98 series ordering example
1
3C
010
UK6
1
Each order must specify an attenuation option.
2
Not available on all models. See specification table.
Frequency range Attenuation Calibration documentation
www.agilent.com/find/accessories
6
Attenuators
44
Programmable and Manual Step
Step attenuator selection guide
The manual and programmable Agilent 355
series attenuators offer exceptional attenuation
accuracy to 1 GHz; 0.1 dB to 1 kHz, 0.25 dB to 500
MHz, 0.35 dB to 1 GHz. They feature BNC(f) RF
connectors, with optional type-N (Option 001)
and TNC (Option 005) also available. To achieve
1 dB steps up to a range of 132 dB, serially
connect two attenuators using a standard
UG-491A/U BNC (m)-to-BNC (m) adapter.
Programmable Agilent 355EF models feature
a 7-pin connector. To protect your transistor
driver against transients during the switching
cycle, order Option 007 to install a protective
diode between each solenoid and driver.
Agilent 355C (0 to 12 dB, 1 dB steps)
Agilent 355D (0 to 120 dB, 10 dB steps)
Agilent 355E (0 to 12 dB, 1 dB steps)
Agilent 355F (0 to 120 dB, 10 dB steps)
Agilent 355 series specifications
Agilent 355C/D
Frequency range
Step Attenuation
size range dc to 1000 MHz dc to 4 GHz dc to 18 GHz dc to 26.5 GHz dc to 40 GHz
0 to 11 dB 8494A 8494B
0 to 12 dB 355C
0 to 70 dB 8495A 8495B 8495D
0 to 110 dB 8496A 8496B
0 to 120 dB 355D
0 to 11 dB 8494G 8494H 84904K 84904L
0 to 12 dB 355E
0 to 70 dB 8495G 8495H 8495K
84907K 84907L
0 to 90 dB 8497K
84906K 84906L
0 to 110 dB 8496G 8496H
0 to 120 dB 355F
Manual
Programmable
10 dB
1 dB
1 dB
10 dB
Manual
Programmable
6
Attenuators
45
Programmable and Manual Step
Agilent 84904L
Agilent 84904/906/907 series
This family of programmable step attenuators offers
unmatched attenuation performance to 40 GHz. The K models
brings superior accuracy and reliability to 26.5 GHz, and the
L models offers unparalleled performance to 40 GHz.
Agilent step attenuators consist of 3 or 4 cascaded sections
of specific attenuation values; e.g., 1, 2, 4, or 10, 20, 30, or
40 dB. Both families offer the selection, performance, accuracy,
and reliability expected from Agilent: attenuation ranges of 11,
70, or 90 dB, 1 dB, and 10 dB step sizes, 5 million cycles per
section and better than 0.03 dB repeatability. RF connector
choices include precision 3.5 mm on the 26.5 GHz K models,
and precision 2.4 mm or 2.92 mm on the L models. While the
2.92-mm connector format is compatible with both 3.5-mm
and SMA connectors, Agilent Technologies recommends the
more rugged 2.4-mm connectors.
Agilent programmable step attenuators feature electromechanical designs that achieve 20 milliseconds switching
time, including settling time. The permanent magnet latching
allows automatic interruption of the dc drive voltage to cut
power consumption and simplify circuit design. They are
equipped with 10-pin DIP sockets (m) and have optional
interconnect cables available.
Agilent 8494/95/96A/B/D
Agilent 8494/95/96G/H/K
www.agilent.com/find/accessories
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 milliseconds. 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.
6
Attenuators
47
Programmable and Manual Step
Agilent model Frequency Attenuation Insertion Maximum Repeatability1Maximum RF Shipping
(switching mode) range (GHz) range loss @ 0 dB SWR life input power weight
355C dc to 1 0 to 12 dB
(Manual) 1 dB steps
355E dc to 1 0 to 12 dB
(Programmable) 1 dB steps
355D dc to 1 0 to 120 dB
(Manual) 10 dB steps
355F dc to 1 0 to 120 dB
(Programmable) 10 dB steps
8494A dc to 4 0 to 11 dB
(Manual) 1 dB steps
1.5
8494G dc to 4 0 to 11 dB
(Programmable) 1 dB steps
8494B dc to 18 0 to 11 dB 1.5 to 8 GHz
(Manual) 1 dB steps 1.6 to 12.4 GHz
8494H dc to 18 0 to 11 dB 1.9 to 18 GHz
(Programmable) 1 dB steps
8495A dc to 4 0 to 70 dB
(Manual) 10 dB steps
1.35
8495G dc to 4 0 to 70 dB
(Programmable) 10 dB steps
8495B dc to 18 0 to 70 dB 1.35 to 8 GHz
(Manual) 10 dB steps 1.5 to 12.4 GHz
8495H dc to 18 0 to 70 dB 1.7 to 18 GHz
(Programmable) 10 dB steps
8495D dc to 26.5 0 to 70 dB 1.6 to 6 GHz 0.03 dB max
(Manual) 10 dB steps 1.6 to 12.4 GHz to 18 GHz
8495K dc to 26.5 0 to 70 dB 0.5 dB + 1.9 to 18 GHz 0.05 dB max
(Programmable) 10 dB steps 0.13 dB/GHz 2.2 to 26.5 GHz to 26.5 GHz
5 million cycles
per section
8496A dc to 4 0 to 110 dB
(Manual) 10 dB steps
1.5
8496G dc to 4 0 to 110 dB
(Programmable) 10 dB steps
8496B dc to 18 0 to 110 dB 1.5 to 8 GHz
(Manual) 10 dB steps 1.6 to 12.4 GHz
8496H dc to 18 0 to 110 dB 1.9 to 18 GHz
(Programmable) 10 dB steps
8497K dc to 26.5 0 to 90 dB 0.4 dB + 1.25 to 6 GHz 0.03 dB max
(Programmable) 10 dB steps 0.09 dB/GHz 1.45 to 12.4 GHz to 18 GHz
1.6 to 18 GHz 0.05 dB max
1.8 to 26.5 GHz to 26.5 GHz
5 million cycles
per section
Specifications
1
Measured at 25 °C. 2Not to exceed average power.
0.2 dB +
2.3 dB/GHz
0.03 dB max
0.5 million cycles
per section
0.5 W avg.
350 W peak
2
(10 µs max.)
1 W avg.
100 W peak
2
(10 µs max.)
1.4 kg (3 lb)
0.9 kg (2 lb)
1.2 to 250 MHz
1.3 to 500 MHz
1.5 to 1 GHz
0.03 dB max
5 million cycles
per section
0.6 dB +
0.09 dB/GHz
0.4 dB +
0.07 dB/GHz
0.03 dB max
5 million cycles
per section
0.6 dB +
0.09 dB/GHz
www.agilent.com/find/accessories
48
6
Attenuators
Programmable and Manual Step
Std. Opt. 001 Opt. 005
RF connectors BNC (f) N (f) TNC (f)
Drive circuit protection Opt. 007: Protection diodes for Agilent 355E,F
Std. Opt. 011 Opt. 015
Supply voltage
Supply voltage range 20 to 30 Vdc 4.5 to 7 Vdc 13 to 22 Vdc
Supply voltage (nom) 24 Vdc 5 Vdc 15 Vdc
Current drawn 125 ma 300 ma 187 ma
RF connectors
A,B,G,H models Opt. 001: N (f) Opt. 002: SMA (f) Opt. 003: APC-7
K models Opt. 004: 3.5 mm (f)
DC connectors
G,H,K models Std: 12-pin Viking connector
Opt. 008: 8-inch ribbon cable with 14-pin DIP plug
Opt. 016: 16-inch ribbon cable with 14-pin DIP plug
Calibration documentation See ordering information
Agilent 355 series options
Agilent 8494/95/96/97 series options
6
6
Attenuators
49
Programmable and Manual Step
Agilent Model Frequency Attenuation Insertion Maximum SWR Repeatability1Maximum RF Shipping
(switching mode) range (GHz) range loss (dB) Std. (Opt. 006) life input power weight
84904K dc to 26.5 1.3 (1.5) to 12.4 GHz
(Programmable) 0 to 11 dB 0.8 dB + 1.7 (1.9) to 34 GHz 0.29 kg
84904L dc to 40 1 dB steps 0.04 dB/GHz 1.8 (2.0) to 40 GHz (10.32 oz)
(Programmable)
84906K dc to 26.5 1.3 (1.5) to 12.4 GHz
(Programmable) 0 to 90 dB 0.8 dB + 1.7 (1.9) to 34 GHz 0.29 kg
84906L dc to 40 10 dB steps 0.04 dB/GHz 1.8 (2.0) to 40 GHz (10.32 oz)
(Programmable)
84907K dc to 26.5 1.25 (1.4) to 12.4 GHz
(Programmable) 0 to 70 dB 0.6 dB + 1.5 (1.7) to 34 GHz 0.23 kg
84907L dc to 40 10 dB steps 0.03 dB/GHz 1.7 (1.9) to 40 GHz (8.1 oz)
(Programmable)
Specifications
1
Measured at 25 °C.
2
Not to exceed average power.
Std. Opt. 011 Opt. 015
Supply voltage
Supply voltage range 20 to 30 Vdc 4.5 to 7 Vdc 13 to 22 Vdc
Supply voltage (nom) 24 Vdc 5 Vdc 15 Vdc
125 mA 322 mA 187 mA
RF connectors
K models Std.: 3.5 mm (f) Opt. 104: 3.5 mm (f)
3
3.5 mm (m)
4
L models Std.: 2.4 mm (f) Opt. 006: 2.92 mm (f) Opt. 100: 2.4 mm (f)
3
Opt. 106: 2.92 mm (f)
3
2.4 mm (m)
4
2.92 mm (m)
4
Calibration documentation See ordering information
Agilent 84904/906/907 series options
3
Drive cable end.
4
End opposite to drive cable.
1 W avg.
100 W peak
2
(10 µs max)
0.03 dB max.
5 million cycles
per section
Agilent Model Number OEM Model Number Agilent Model Number OEM Model Number
8494A 33320A 8496H 33322H
8494B 33320B 8497K 33323K
8494G 33320G 84904K 33324K
8494H 33320H 84904L 33324L
8495G 33321G 84906K 33326K
8495H 33321H 84906L 33326L
8495K 33321K 84907K 33327K
8496G 33322G 84907L 33327L
Some Agilent attenuators were available as OEM equivalents to standard models.
This table shows the corresponding model numbers.
OEM models of step attenuators are furnished without a base.
www.agilent.com/find/accessories
6
Outline Drawings
Agilent 84904/906/907 series – programmable
Attenuators
Programmable and Manual Step
Agilent 8494/95/96/97 series – manual
41.8
(1.65)
10.4
(0.41)
Mounting holes (4)
M3 X 0.5 X 6 Deep
2.6 dia. Thru
5.8
(0.23)
13.3
(0.52)
94
(3.7)
73.3
(2.89)
104.3
(4.11)
41.5
(1.63)
2.4 mm (f) connectors std. (L-models)
3.5 mm (f) connectors std. (K-models)
See ordering example for connector options
6.6
(0.26)
6.6
(0.26)
10.4
(0.41)
Mounting holes (4)
M3 X 0.5 X 6 Deep
2.6 Thru
5.8
(0.23)
13.3
(0.52)
74.5
(2.9)
53.8
(2.1)
84.8
(3.3)
41.5
(1.63)
2.4 mm (f) connectors std. (L-models)
41.8
(1.65)
19.3
(0.76)
21.7
(0.85)
7.4
(0.30)
22.2
(0.87)
11.1
(0.44)
3.5 mm (f) connectors std. (K-models)
101.60 (4.00)
1
129.03 (5.08)
2
7.9
(0.31)
12.2
(0.5)
SMA jack (2)
22.1
(0.87)
19.0
(0.75)
9.5
(0.38)
83.30 (3.28)
1
111.00 (4.37)
2
76.2 (3.000)
1
103.7 (4.084)
2
9.15 (0.36)
12. 5
(0.49)
4-40 UNC x 5.11 mm (.20) deep
Mounting holes (2), this side only
83.30 (3.28)
1
111.00 (4.37)
2
19.0
(0.75)
9.15 (0.36)
9.5
(0.38)
1
Agilent 8495A,B.
2
Agilent 8494A,B, 8495D, 8496A,B.
Note: Base can be removed
by user to access mounting
holes as shown.
11.4
(0.45)
38.1
(1.50)
56.1
(2.21)
22.9
19.0
(0.90)
(0.730)
7.4
(0.29)
Dimensions are in mm (inches) nominal, unless otherwise specified.
50
Attenuators
51
Programmable and Manual Step
Agilent 8494/95/96/97 series – programmable
Dimensions are in mm (inches) nominal, unless otherwise specified.
PRESS
Solenoid drive plug detail
To remove: Press at arrows with thumb and finger;
pull to detach.
Caution: Do not twist.
1
Agilent 8495G,H.
2
Agilent 8494G,H, 8495K, 8496G,H, 8497K.
101.6 (4.00)
1
129.0 (5.08)
2
83.3 (3.28)
1
111 (4.37)
2
8.9
Note: Base can be removed by user to
access mounting holes as shown above.
(0.35)
4-40 UNC x 5.1 mm (0.20)
Deep mounting
Holes (2) both sides
19.1
(0.75)
10. 4
(0.41)
76.2 (3.00)
1
103.7 (4.08)
2
104.9 (4.13)
1
132.7 (5.21)
2
15.7
(0.62)
Solenoid drive plug and 5 ft. cable
supplied, 6.3 (0.25) dia.
41.3
(1.63)
14
8
1
7
Plug top view
(pins on oher side)
14 Pin
IC Plug type
Opt. 016:
406 (16)
Opt. 008:
203 (8)
11.4
(0.45)
44.5
(1.80)
22.9
(0.90)
7.4
(0.29)
11.4
(0.45)
44.4
(1.75)
56.1
(2.21)
22.9
19.0
(0.90)
(0.730)
7.4
(0.29)
6
www.agilent.com/find/accessories
6
Agilent 8494/95/96/97 series ordering example
Agilent 8 49 Option Option Option Option
4: 11 dB max, 1 dB steps A: Manual, dc to 4 GHz A,B,G,H models: Std.: 24 Vdc G, H, K models UK6: Commercial calibration
5: 70 dB max, 10 dB steps B: Manual, dc to 18 GHz 001: N (f) 011: 5 Vdc Std.: 12-pin Viking test data with certificate
6: 110 dB max, 10 dB steps D: Manual, dc to 26.5 GHz
2
002: SMA (f) connector
7: 90 dB max, 10 dB steps G: Programmable, dc to 4 GHz 003: APC-7 008: 8-inch ribbon
UKS: Commercial calibration
H: Programmable, dc to 18 GHz D,K models: cable with
certificate
K: Programmable, dc to 26.5 GHz
3
004: 3.5 mm (f)
3
14-pin DIP plug
016: 16-inch ribbon
cable with
14-pin DIP plug
4
A
001
011
008
UK6
Agilent 84904/906/907 series ordering example
4
Agilent 8490 Option Option Option
4: 11 dB max, 1 dB steps K: dc to 26.5 GHz
Std.: 24 Vdc
K models UK6: Commercial calibration
6: 90 dB max, 10 dB steps L: dc to 40 GHz 011: 5 Vdc 104: 3.5 mm (f) drive cable end test data with certificate
7: 70 dB max, 10 dB steps 015: 15 Vdc 3.5 mm (m) opposite end
UKS: Commercial calibration
L models
certificate
006: 2.92 mm (f) both ends
100: 2.4 mm (f) drive cable end, 2.4 mm (m) opposite end
106: 2.92 mm (f) drive cable end, 2.92 mm (m) opposite end
4
K
011
UK6
006
1
Each order must include RF connector option.
2
Available with Agilent 8495 only.
3
Available with Agilent 8495/97 only.
4
Drive cable not included. See Attenuator Cables table on next page.
5
Option UK6/UKS not available with Option 106.
Agilent 355 Option Option
C: Manual, 0 to 12 dB, 1 dB steps Std: BNC (f) 007: Protection diodes
D: Manual, 0 to 120 dB, 10 dB steps 001: N (f) for Agilent 355E,F
E: Programmable, 0 to 12 dB, 1 dB steps 005: TNC (f) (see page 38)
F: Programmable, 0 to 120 dB, 10 dB steps
Step attenuator ordering information
Agilent 355 series ordering example
D
001
007
Type/attenuation range
Attenuation range
Attenuation range
Type/frequency range
Frequency range
RF connector
1
Supply voltage
Supply voltage
DC connector
RF connector
Calibration documentation
5
Calibration documentation
5
Drive circuit protection
RF connector
Attenuators
52
Programmable and Manual Step
6
Attenuators
53
Programmable and Manual Step
Attenuator/switch driver
attenuator accessories
Agilent model Agilent part
number number Where used Description
11764A 11713A to 84904/906/907 10-pin DIP to Viking conn., 60 inches
11764B 84904/906/907 to ribbon 10-pin DIP to 60 inch ribbon cable, bare leads
11764C 84904/906/907 to DIP 10-pin DIP to 14-pin DIP, 8-inch ribbon cable
11764D 84904/906/907 to DIP 10-pin DIP to 14-pin DIP, 16-inch ribbon cable
11764-60005 84941A dist bd to 8494/95/96/97 Viking to (4) 4-pin Berg conn., 30 inches
11764-60006 84941A dist bd to 84904/906/907 10-pin DIP to (4) 4-pin Berg conn., 30 inches
70612-60017 84941A dist bd to 8494/95/96/97 Viking to (4) 4-pin Berg conn., 20 inches
70612-60018 84941A dist bd to 84904/906/907 10-pin DIP to (4) 4-pin Berg conn., 20 inches
Attenuator drive cables
For complete cable configuration information, request publication number 5963-2038E, Agilent 70611A, Agilent 87130A
and Agilent 11713A Switch Attenuator Driver Configuration Guide.
Agilent 11713A attenuator/switch driver
This driver provides GPIB or “local” front panel drive control for
programmable attenuators and electromechanical switches.
Concurrently, drive up to two Agilent 8494/95/96 and Agilent
87904/906/907 programmable attenuators and two electromechanical switches (Agilent 8761, 8762, or 8765 series).
The Agilent 11713A can also be used to supply +24V common
and ten pairs of current sinking contacts (total current draw
<1.25A peak for 1 sec., 0.65A steady state) to independently
control up to 10 relays. An integral power supply (with short
circuit protection) eliminates the need for an external power
source. Each Agilent 11713A is supplied with two plug-in drive
cables to simplify connection to programmable attenuators.
Switching time is less than 10 milliseconds.
Attenuator accessories
Agilent 11716 series attenuator interconnect kits
These kits can be utilized to connect any two of the
Agilent 8494/95/96 attenuators in series. The rigid
interconnect cable is available in type-N, APC-7,
and SMA connectors as described below.
Agilent 11716A Attenuator Interconnect Kit (type-N)
Agilent 11716C Attenuator Interconnect Kit (SMA)
Agilent 11713A
Agilent 11716A
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