84904L [AGILENT]
Programmable Step Attenuators; 可编程步进衰减器
| 型号： | 84904L |
| 厂家： | 
AGILENT TECHNOLOGIES, LTD. |
| 描述： | Programmable Step Attenuators |
| 文件： | 总8页 (文件大小：133K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Agilent 84904, 6, 7K/L
Programmable Step Attenuators
Data Sheet
performance with an attenuation
range of 0 to 90 dB in 10 dB steps.
Other models include the Agilent
84904K/L, with 0 to 11 dB of attenua- units, 35% smaller than the 8495/7
tion in 1 dB steps, and the Agilent (26.5 GHz) family, allows for easy
84907K/L, with 0 to 70 dB of attenua- integration into instruments and ATE
standing, with less than 2 dB of loss
at 26.5 GHz and only 2.4 dB at 40 GHz
(figure 1). The compact size of the
Excellent repeatability
High accuracy
Excellent reliability, long life
Features and description
• DC to 26.5 GHz, DC to 40 GHz
frequency coverage
tion in 10 dB steps.
systems.
This latest design evolution sets new
standards for size and performance.
High attenuation accuracy and low
SWR are achieved through the use of
miniature thin-film attenuation cards
composed of high-stability tantalum
nitride film on a sapphire substrate.
Insertion loss performance is out-
4
This family of step attenuators offers
three connector types. For operation
to 40 GHz, the 84904/6/7L models
offer either the 2.4 mm connector,
which is recommended for top per-
formance and for rugged and repeat-
able connections, or the 2.92 mm con-
nector, which is compatible with SMA
and 3.5 mm connectors but is more
delicate. For operation to 26.5 GHz,
the 84904/6/7K models offer the
3.5 mm connector. This connector is
compatible with SMA and 2.92 con-
nectors, but is more rugged. Each
model in the 84904/6/7K and L family
comes with two female connectors
(standard) or may be ordered with
one female and one male connector
for easy insertion into a microwave
chain or to combine the 1 dB step
• Optional calibration data
• 0 to 11 dB, 70 dB, 90 dB
• 1 dB steps, 10 dB steps
• Excellent repeatability
• High accuracy
• Excellent reliability, long life
• Exceptionally low insertion loss
These attenuators offer repeatability
of better than 0.03 dB and excellent
life (greater than 5 million switching
cycles per section).
3
84904/6L
(2.4)
Insertion
Loss
84904/6K
(1.9)
2
(dB)
(1.8)
This family of programmable step
attenuators offers coaxial measure-
ments to 26.5 GHz (K models) or to
40 GHz (L models), in a compact,
rugged design. The first model in this
family is the Agilent Technologies
84906K/L, which offers outstanding
84907L
1
(1.4)
84907K
(.8)
(.6)
0
10
20
30
40
Frequency (GHz)
Figure 1. Insertion loss
84904 with a 10 dB step 84906 or
84907 to cover an attenuation range
of 121 dB or 81 dB in 1 dB steps.
negative voltage or ground. Figure 4
defines the pin assignments and wire
color code for the 11764-60001/60002/
60003 drive cables. Table 1 is a sole-
noid drive pin and attenuation guide.
Table 2 (on page 4) defines recom-
mended attenuator section activation.
Selection switching
Figure 2 shows one attenuator sec-
tion schematic. Each section utilizes
one solenoid with dual coil windings,
one coil to switch in the attenuator
card (e.g. 10 dB) and one coil to
switch in the thru line (0 dB).
Individual calibration data reports of
attenuation and SWR are available.
This data, measured with an Agilent
automatic network analyzer, can be
ordered as Option 8490XX-UK6.
As a section is switched, the internal
contacts of the activated coil open,
thus shutting off current flow. At the
same time, the internal contacts for
the other coil close so that it can be
activated when desired. Figure 3
shows a section that has been
switched to the attenuator card posi-
tion (note the closed thru line coil
contact). The switching is “break-
before-make” type, thus a momentary
interruption of the RF signal occurs
at switching.
RF Connector
Drive Pin
Attenuation switching and control
These units feature the same
small solenoids and switching circuits
as the Agilent Technologies
(e.g., pin 6)
Internal
Coil Contacts
Thru Line
Typical
Pin
(e.g., pin 5)
External
Driver
8494/5/6/7 step attenuator family.
Switching time is a maximum of 20
milli-seconds, including contact set-
tling time. Once switched, the units
are latched with permanent magnets,
capable of withstanding shocks over
10 Gs. The solenoids automatically
disconnect after switching, which
minimizes the attenuators’ power
requirements and simplifies the driv-
er circuit design (figure 3). Solenoids
are available in either 24 volt (stan-
dard, Option 8490xx-024), 15 volt
(Option 8490xx-015), and 5 volt
(Option 8490xx-011) ranges to fit
your instrument or system
To next
Section
RF Input
RF to
next Section
of Output
Attenuation
Card
Although all sections can be switched
simultaneously, the attenuator driver
must not allow both pins of the same
section (e.g. Section 1, pins 1 and 2)
to be activated concurrently, or else
that section would cycle rapidly. All
terminals are “floating,” so bipolar or
unipolar power supplies can be used.
Figure 2. Section electrical diagram
With positive voltage applied to the
common pin, the state (attenuator
card or thru line) of a particular sec-
tion is determined by connecting its
attenuator card pin or thru pin to a
requirements.
LED Indicator Circuit
+5V
0.13K
0.62K
Attenuator Section
To next Section
The units come equipped with 10-pin
DIP headers for connecting dc control
lines. Available accessories include a
203 mm (8 inch) or 406 mm (16 inch)
ribbon cable with DIP-type connectors
that is compatible with standard 14-
pin DIP IC sockets (11764-60002 or
11764-60003, respectively). Altern-
atively, a 1524 mm (5 foot) cable with
free wires for direct soldering (11764-
60001), or a 1524 mm (5 foot) drive
cable that connects to the 11713B/C
attenuator/ switch driver, allowing for
easy integration into GPIB-controlled
automatic test systems (11764-60004),
may be ordered.
LED
Driver
4.22K
5082-4880
(DM7406N*)
Switch Driver Circuit
Thru Line
Drive Pin
Drive
Cable
A
B
TTL Input
+5V
Internal
Coil Contacts
+24V
RF
Inverter
IC Relay Driver
(DS75452N*)
(DM7404N*)
Connector
Drive Pin
RF to next
Section
or Output
Thru Line
TTL Indicator Circuit
TTL Output
RF In
*Fairchild Semiconductor
part numbers, also supplied
by other vendors:
4.22K
0.62K
D
NOTE: Additional circuit
design information may
be required from the
Attenuation Card
Inverter
(DM7404N*)
component manufacturers.
Figure 3. Driver and indicator circuits for one section of an Agilent 84904, 6, 7 K/L
2
Typical driver circuit
Attenuator
DIP plug
Figure 3 shows an economical TTL
compatibility driver circuit for a sin-
gle attenuation section which utilizes
and IC relay driver and an inverter. A
TTL “HI” input to the driver switches
in the attenuation card, while a “LO”
will activate the thru line for that sec-
tion. This provides a complimentary
driver for the section which assures
that only one solenoid of the pair is
activated at a time. Diode protection
is required to protect the IC from the
solenoid voltage flyback.
11764-60001/2/3 wire colors
1
2
1. Brown
3. Orange
5. Green
7. Violet
9. White
2. Red
4. Yellow
6. Blue
9
10
8. Gray
10. Black
RF connector
14
1
11764-60002/3 header
Brown
Red
Brown
Red
1
2
3
4
5
6
7
14
13
12
11
10
9
Orange
Yellow
Green
Blue
Orange
Yellow
Green
Blue
Violet
Gray
Violet
Gray
Switch position can be indicated
remotely by utilizing the open and
closed states of the internal coil
contacts. Connected at A and B in
figure 3 are two indicator circuits, one
providing a TTL output and one that
activates an LED. These circuits will
output a TTL “HI (LED lamp ON”) if
the attenuation card is in the RF cir-
cuit, and will output a TTL “LO” (LED
lamp “OFF”) if the thru line is in the
RF circuit. Since current is drawn
through the coil for these circuits,
inadvertent switching is prevented by
limiting the current to 5 mA.
White
Black
White
Black
8
8
7
11764-60001/2/3
14 pin header colors
1
2
3
4
14
13
12
11
Red
Yellow
Brown
Orange
Blue
Green
5 Gray
6 Black
7
10 Violet
9 White
8
Figure 4. Attenuator switching pinout
Table 1. Solenoid pin and attenuation guide
Section:
Section 1
Section 2
Section3
Section 4
Agilent Technologies assumes no
responsibility for the use of any cir-
cuits described herein and makes no
representation or warranties, express
or implied, that such circuits are free
from patent infringement.
Thru
Line
Attn
Thru
Line
Attn
Thru
Line
Attn
Thru
Line
Attn
Model Number
Card
Card
Card
Card
84906K/L
Attenuation (dB)
Actuating pin
11764-60004 plug
Pin number
11764-60002/60003 flat
Header pin number
0
1
10
2
0
5
20
8
0
4
30
9
0
6
30
7
5
6
2
7
8
5
9
3
10
9
11
4
12
10
Drive cables
13
11
11764-60001 10 pin DIP to 60” long
ribbon cable
84907K/L
Attenuation (dB)
Actuating pin
11764-60004 plug
Pin number
11764-60002/60003 flat
Header pin number
0
1
10
2
0
5
20
8
0
4
40
9
11764-60002 10 pin DIP to 14 pin DIP,
8” long
5
6
2
7
8
5
9
3
10
9
11764-60003 10 pin DIP to 14 pin DIP,
16” long
13
11
84904K/L
Attenuation (dB)
Actuating pin
11764-60004 plug
Pin number
11764-60002/60003 flat
Header pin number
0
1
1
2
0
5
2
8
0
4
4
9
0
6
4
7
11764-60004 10 pin DIP to 12 pin Viking
connector, 60” long. Used
with 11713A driver
5
6
2
7
8
5
9
3
10
9
11
4
12
10
11764-60006 10 pin DIP to (4) 4 pin BERG
connectors, 30” long. Used
13
11
with 87130A or 70611A driver
Pin 10 is +V Supply
3
Table 2. Attenuator section activation guide
Recommended switching sequence: The following switching sequence (ie. which 30 dB section to use for the 84906K/L or which 4 dB section for the
84904K/L should be followed to insure performance to specs.
Attenuation selected
84906K/L
0 dB
10 dB
20 dB
30 dB
40 dB
50 dB
60 dB
70 dB
80 dB
90 dB
Section 1 (10 dB)
Section 2 (20 dB)
Section 3 (30 dB)
Section 4 (30 dB)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
84907K/L
0 dB
10 dB
20 dB
30 dB
40 dB
50 dB
60 dB
70 dB
Section 1 (10 dB)
Section 2 (20 dB)
Section 3 (40 dB)
X
X
X
X
X
X
X
X
X
X
X
X
84904K/L
0 dB
1 dB
2 dB
3 dB
X
4 dB
5 dB
6 dB
7 dB
X
8 dB
9 dB
10 dB
11 dB
Section 1 (1 dB)
Section 2 (2 dB)
Section 3 (4 dB)
Section 4 (4 dB)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Switching notes: Pins relate to 10-pin attenuator header as shown (Table 1), NOT terminating connector on any attached drive cable. Solenoids are magnetic
latching type; drive voltage may be removed after switching. Current is self-interrupting in less than 20 ms.
4
Option 8490xx-UK6 provides a tabu-
lar list of attenuation and reflection
coefficients in 250 MHz steps from
1500 MHz to 40 GHz. Measurements
are traceable to NIST (National
Institute of Standards and
Technology, formerly NBS) standards
and feature very low measurement
uncertainties (See tables 3 and 4).
GPIB attenuator/switch driver
Employing programmable step atten-
uators and switches in an automatic
test system becomes an easy task
when the Agilent 11713B/C attenuator/
switch driver is specified into the
system.
Optional calibration data for the
Agilent 84904/6/7
Use of calibration data (i.e., accuracy,
recorded, data of a device’s charac-
teristics) has always been an effective
means of reducing measurement
uncertainty at RF and microwave
frequencies. Step attenuators have
long been used as reference stan-
dards in the measurement of gain,
attenuation, and receiver sensitivity.
Since the accuracy specifications
include margins for frequency
The 11713B/C has all of the necessary
features to provide GPIB, USB, or LAN
control of up to four programmable
attenuators of the 84904/6/7 series,
and concurrently up to four electro-
mechanical switches (e.g., the 8671B
or 8762 Series).
For devices with option 8490xx-006
and option 8490xx-106, option
8490xx-UK6 and NIST traceability are
not available.
response and unit-to-unit variations,
calibration data can improve overall
measurement uncertainty.
Table 3. Agilent 84904/6/7K/L reflection
coefficient data uncertainty
The 11713B/C includes an integral
power supply (with short circuit
protection) that can simultaneously
provide 125 millamps at 24 volts
to all contacts for control of the
attenuators and switches, so no
external power supply is needed.
Connecting between the 11713B/C
and the 84904/6/7 step attenuators
is easy with the 11764-60004 drive
cable.
Calibration data is available as
Option 8490xx-UK6 and is generated
from measurements made by an
Agilent network analyzer.
Frequency Range (GHz)
dc to 12.4
14.4 to 26.5
26.5 to 34
34 to 40
.017
.023
.025
.028
Table 4. Agilent 84904/6/7K/L attenuation data uncertainties
Attenuation (dB)
dc to 20 GHz
20 to 26.5 GHz
26.5 to 40 GHz
0
0.12
0.16
0.16
0.17
0.32
0.36
0.36
0.52
0.50
0.66
0.12
0.24
0.25
0.30
0.47
0.54
0.54
0.72
0.52
0.91
0.15
0.30
0.30
0.30
0.30
0.30
0.30
0.35
0.60
1.05
The 11713B/C also features convenient
front panel keys so the user can man-
ually activate the individual attenua-
tion sections and switches when in
the “local” mode. Switching time for
the drivers is less than 10 millisec-
onds.
10
20
30
40
50
60
70
80
90
5
Attenuator setting
Attenuation accuracy ( dBꢀ referenced from 0 dB setting):
84907K/L
84906K/L
Attenuator setting
Frequency range dc to 40 GHz2
10
20
30
40
50
60
70
80
90
0.5
0.6
0.7
1.0
1.2
1.6
1.8
2.7
2.9
84904K/L
Attenuator setting (dB)
Frequency range
dc to 18 GHz
1
2
3
4
5
6
7
8
9
10
11
0.35
0.40
0.60
0.45
0.50
0.60
0.55
0.70
0.80
0.55
0.70
0.80
0.55
0.70
0.80
0.55
0.70
0.90
0.60
0.80
1.10
0.60
0.80
1.10
0.65
0.85
1.20
0.70
0.90
1.30
0.80
1.10
1.50
18 to 26.5 GHz
26.5 to 40 GHz2
1
2
Step-to-step accuracy is the maximum variation from the nominal step size when changing attenuation values. It is a second specification on accuracy, and is used in combina-
tion with the absolute accuracy specifications to limit maximum allowable variation from nominal. Typical step-to-step accuracy for the 84906L and 84907L is 0.6 dB to 26.5
GHz, 0.9 dB to 40 GHz; for the 84904L is 0.3 to 26.5 GHz, 0.4 to 40 GHz.
Attenuation accuracy to 26.5 GHz for K models.
Specifications
Insertion loss
(in dB 0 dB position, f = freq. in GHz)
84904K/L
84906K/L
84907K/L
(0.8 + 0.04xf)
(0.8 + 0.04xf)
(0.6 + 0.03xf)
SWR
Connector
Option
dc to
12.4 GHz
34 GHz to
40 GHz
SWR
Connector dc to
12.4 GHz
to 26.5 GHz
12.4 GHz to 34 GHz
Option
12.4 GHz
L models
84904L
84904L
84904L
84904L
84906L
84906L
84906L
84906L
84907L
84907L
84907L
84907L
K models
84904K
84904K
84906K
84906K
84907K
84907K
with 101
with 006
with 100
with 106
with 101
with 006
with 100
with 106
with 101
with 006
with 100
with 106
1.3
1.5
1.3
1.5
1.3
1.5
1.3
1.5
1.25
1.4
1.25
1.4
1.7
1.9
1.7
1.9
1.7
1.9
1.7
1.9
1.5
1.7
1.5
1.7
1.8
2.0
1.8
2.0
1.8
2.0
1.8
2.0
1.7
1.9
1.7
1.9
004
104
004
104
004
004
1.3
1.3
1.3
1.3
1.25
1.25
1.7
1.7
1.7
1.7
1.5
1.5
Attenuation temperature coefficient
Environmental capabilities
Shock operating
Less that 0.0001 dB/dB/C°
(Up to 5 million cycles)
10 Gs, six ms, on six sides, three
blows
Power sensitivity
Temperature, operating
0.001 dB/Watt
–20°C to +75°C
Shock, non-operating
500 Gs, 1.8 ms, in six directions
RF Input power (max.)
Temperature, non-operating
1 Watt average, 50 Watts peak
(10 μs max. pulse width)
–55°C to +85°C
Vibration, operating
5 Gs, 34-2000 Hz
Altitude, operating
Life (min.)
4,570 meters (15,000 ft.)
EMC
5 million cycles per section
Radiated interference is within the
requirements of MIL-STD-461 method
RE02, VDE 0871 and CISPR
Publication II
Altitude, non-operating
13,700 meters (50,000 ft.)
Repeatibility
0.03 dB, typical
Humidity
Cycling 5 days, 40°C at 95% RH with
condensation
6
Mechanical information
Net weight
84904K/L
84906K/L
84907K/L
291 grams
(10.3 oz)
291 grams
(10.3 oz)
229 grams
(8.1 oz)
Mounting position (any)
RF connectors
2.4 mm connectors standard, L models only
2.92 mm (SMA compatible), L models only
3.5 mm (SMA compatible), K models only
Switching speed
Maximum 20 msec including settling time
Switching
Current1
Nominal coil
impedance
Solenoids
Coil voltage
Option 024
24 V
125 mA
(20 to 30 V)
(at 24 V)
190 :
80 :
17 :
Option 015
Option 011
15 V
188 mA
(13 to 22 V)
(at 15 V)
5 V
325 mA
(at 5 V)
(4.5 to 7 V)
1
Current per section; approximately 10 msec duration before internal contacts open the coil circuit
94
74.5
(2.9)
53.8
(2.1)
11.5
22.5
(3.7)
7.8
73.3
(2.89)
5.8
(.23) 13.5
5.8
(.23) 13.5
22.2
(.87)
41.8
(1.65)
41.8
(1.65)
84904,6K/L
84907K/L
*6.6
*6.6
11.1
(.44)
Mounting holes
4X M3X0.5X6 deep
Ø 2.6 thru
Mounting holes
4X M3X0.5X6 deep
Ø 2.6 thru
(.26)
(.26)
10.4
(.41)
10.4
(.41)
104.3
(4.11)
84.7
41.5
(1.63)
41.5
(1.63)
2.4 mm Connector STD
or:
2.92 mm Connectors
(SMA Compatible)
Option 006
2.4 mm Connector STD
or:
2.92 mm Connectors
(SMA Compatible)
Option 006
* L models – 6.6 (0.3; 2.4 mm (f) connector (f)
L models, Opt. 006 – 2.92 mm (f) connector (SMA compatible)
K models – 9.8 (0.4); 3.5 mm (f) connector (SMA compatible)
**
L models – 6.6 (0.3); 2.4 mm (f) connector STD
L models, Opt. 006 – 2.92 mm (f) connector (SMA compatible)
L models, Opt. 100 – 5.7 (0.2); 2.4 mm male connector
L models, Opt. 106 – 7.4 (0.3); 2.92 mm male connector
K models – 9.8 (0.4); 3.5 mm (f) connector (SMA compatible)
K models, Opt. 104 – 10.6 (0.4); 3.5 mm (m) connector
Figure 5. Dimensions are in millimeters and inches.
7
Ordering information
www.agilent.com
Programmable step attenuators
For more information on Agilent
Technologies’ products, applications
or services, please contact your local
Agilent office. The complete list is
available at:
84904K 0 to 11 dB, 1 dB steps; dc to 26.5 GHz
84904L 0 to 11 dB, 1 dB steps; dc to 40.0 GHz
84906K 0 to 90 dB, 10 dB steps; dc to 26.5 GHz
84906L 0 to 90 dB, 10 dB steps; dc to 40.0 GHz
84907K 0 to 70 dB, 10 dB steps; dc to 26.5 GHz
84907L 0 to 70 dB, 10 dB steps; dc to 40.0 GHz
www.agilent.com/find/contactus
Americas
Canada
Options
(877) 894-4414
To add options to a product, use the following ordering scheme:
Latin America 305 269 7500
Model:
84904/6/7x (x = K, L)
United States
(800) 829-4444
Model options: 84904/6/7x-opt#1 or 84904/6/7x-opt#2
Asia Pacific
Australia
China
Hong Kong
India
Japan
Korea
Malaysia
Singapore
Taiwan
Supply voltage (must choose one)
1 800 629 485
800 810 0189
800 938 693
1 800 112 929
0120 (421) 345
080 769 0800
1 800 888 848
1 800 375 8100
0800 047 866
1 800 226 008
84904/6/7x-011 5 V dc supply voltage
84904/6/7x-015 15 V dc supply voltage
84904/6/7x-024 24 V dc supply voltage (standard option)
RF connectors (must choose one)
84904/6/7K-004 • 3.5 mm female connector, 3.5 mm female connector (standard option)
84904/6/7K-104 • 3.5 mm male connector, 3.5 mm female connector
84904/6/7L-006 • 2.92 mm female connector, 2.92 mm female connector
(UK6 not available with this option)
Thailand
84904/6/7L-100 • 2.4 mm male connector, 2.4 mm female connector
84904/6/7L-101 • 2.4 mm female connector, 2.4 female connector (standard option)
84904/6/7L-106 • 2.92 mm male connector, 2.92 mm female connector
(UK6 not available with this option)
Europe & Middle East
Austria
Belgium
Denmark
Finland
France
0820 87 44 11
32 (0)2 404 93 40
45 70 13 15 15
358 (0)10 855 2100
0825 010 700*
*0.125 ¤/minute
01805 24 6333**
**0.14 ¤/minute
1890 924 204
972-3-9288-504/544
39 02 92 60 8484
31 (0)20 547 2111
34 (91)631 3300
0200-88 22 55
Calibration documentation (optional)
84904/6/7x-UK6 Calibration data
Accessories (optional)
11764-60001 • 10-pin dip plug (for attenutor connection) to 1524 mm (5 foot) ribbon cable
11764-60002 • 203 mm (8 inch) ribbon cable with 14-pin headers, female 10-pin receptacle
11764-60003 • 406 mm (16 inch) ribbon cable with 14-pin headers, female 10-pin receptacle
11764-60004 • Interconnect cable 10-pin dip plug to “Viking” connector (for use with 11713B/C)
Germany
Ireland
Israel
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