www.agilent.com
Applications
For more information on Agilent Technol-
ogies’ products, applications or services,
please contact your local Agilent office.
The complete list is available at:
These detectors can be used in a wide variety of applications ranging from lab
and production measurements to systems components. Because of their flat-
ness and match, these detectors can be used for accurately measuring trans-
mission and reflection characteristics in CW or swept-frequency measurements.
For these applications in which both flat-frequency response and square-law
characteristics are important, Option 423B, 847xB/C–001 provides a matched
pair of detectors that track each other within a few tenths of a dB, and Option
423B, 847xB/C–002 (external square-law load) extends the square-law region
up to at least 0.1 mW (10 dBm). Other common applications include use with a
coupler or power splitter to externally level a source, and to display pulsed-RF
and AM-modulated signals.
www.agilent.com/find/contactus
Americas
Canada
(877) 894-4414
305 269 7500
(800) 829-4444
Latin America
United States
Asia Pacific
Australia
China
1 800 629 485
800 810 0189
800 938 693
For OEM and systems applications, the broadband flatness and ruggedness of
these detectors make them particularly well suited for use in closed-loop level-
ing circuits in microwave instrumentation.
Hong Kong
India
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
Japan
Square-law response
Korea
For many reflection and transmission measurements it is desirable to use the
detector in its square-law region where its output voltage is proportional to the
input RF power. As shown in figure 5, the LBSD typically operate within 0.5 dB
of square-law from the tangential signal sensitivity (TSS) level up to 18 dBm.
Malaysia
Singapore
Taiwan
Thailand
By specifying Option 423B, 847xB/C–002, a specially selected loading resistor is
provided which extends this square-law region to approximately 8 dBm with an
associated decrease in sensitivity as shown in figure 5.
Europe & Middle East
Austria
Belgium
Denmark
Finland
France
01 36027 71571
32 (0) 2 404 93 40
45 70 13 15 15
358 (0) 10 855 2100
0825 010 700*
Pulse response
The LBSD detectors have extremely good pulse detection characteristics when
working into low-capacitance, low-resistance loads. When loaded externally
with 50 Ω the LBSD detector can typically display 8 to 12 ns rise times. Figure 6
illustrates the equivalent circuit for the detector, as well as typical values for the
diode impedance and the RF bypass capacitor.
*0.125 €/minute
Germany
Ireland
07031 464 6333
1890 924 204
Israel
972-3-9288-504/544
39 02 92 60 8484
31 (0) 20 547 2111
34 (91) 631 3300
0200-88 22 55
Italy
Netherlands
Spain
Diode
Sweden
Switzerland
impedance
0800 80 53 53
United Kingdom 44 (0) 118 9276201
Other European Countries:
www.agilent.com/find/contactus
Revised: October 6, 2008
RF bypass
V
RF in
50
Video out
capacitor
Figure 7. Detector equivalent circuit
www.agilent.com/find/emailupdates
Get the latest information on the
products and applications you select.
Ordering Information
To add options to a product, use the following ordering scheme:
Model: 847xB/C (x= 0, 2 or 3)
Product specifications and descriptions
in this document subject to change
without notice.
Example options: 8472B–001, 8473C–001
423B–001
847xB/C–001
Matched pair of detectors
© Agilent Technologies, Inc. 2009
Printed in USA, May 25, 2009
5952-8299
423B–002
847xB/C–002
External square-law load
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
