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Click for Page 1
of the July 2015 homepage archives.
 Rohde & Schwarz has again expanded its range
of trigger and decoder options for the
R&S RTO and R&S RTE. With the R&S RTx-K50, the oscilloscopes
help users debug serial protocols that employ Manchester or NRZ coding. The option
can be used with a variety of standardized buses such as PROFIBUS, DALI or MVB as
well as with proprietary serial protocols such as are typically found in industrial
environments and in the aerospace & defense sector. Developers of products that
use these types of interfaces can easily find implementation errors and so test
and release their designs more quickly. The option, which covers data rates of up
to 5 Gbit/s, supports...
 Here are three
electronics-themed comics from vintage issues of Electronics World
and Popular Electronics magazines. My favorite is the page 84 comic where
the sign on the Telco Rectifier Components president's wall is apropos. Maybe one
of the interview questions for job applicants was #1: "Did you notice the sign on
the wall in the waiting room," and #2: "Did you 'get it?,' and please explain."
In 1956 when that comic appeared, AC-to-DC power supplies used high voltage vacuum
tubes, typically 300 volts or more. Hefty capacitors were needed to remove
enough ripple from the "top" of the DC to render it undetectable in the circuit
output - especially if the output was audio where a 60 or 120 Hz (50 or 100 Hz
in Europe) "hum"...
 The basics of
power transistor specification and selection have not changed
much since they became widely commercially available in the 1960s. Although available
package shapes, power handling, cutoff frequencies, and other parameter options
have been greatly expanded, still the most important aspect is not just selecting
a power transistor but properly mounting it to ensure that the rated heat dissipation
capacity will be realized. This 1963 Electronics World magazine article
touches on some of those considerations and how to effectively deal with them...
 Saelig Company announces the
SynthNV -
a programmable 34.4 MHz to 4.4 GHz software-tunable RF signal and sweep
generator with a built-in RF power detector. It is controlled and powered from any
device running Windows, Linux or Android OS via a USB port. The included onboard
RF power detector can be used as a generic RF power meter or combined with the SynthNV's
sweep function to create a basic RF network analyzer. When the RF signal generator
frequency is set, RF power can be measured in less than 400 uS. The SynthNV
design also includes nonvolatile memory so it can be programmed to wake up with
any frequency, power, sweep...
 Planar Monolithics Industries (PMI) has introduced 4 new RF components
that include an 18-40 GHz successive detection log video amplifier (SDLVA), a 6380
to 7440 GHz voltage variable attenuator (VVA), a 1.0-1.1 GHz single pole, two throw
(SPDT) hermetically sealed reflective switch, and a 0-180° bi-phase modulator
/ phase shifter ...
 Fellow cruciverbalists, here from a 1963
edition of Electronics World is an
electronics-themed crossword puzzle for your end-of-the week enjoyment.
You can click on the grid for a larger, printable, write-on-able paper version.
If you are an avid worker of crosswords and don't already know it, I have created
hundreds over the last decade+ that are available
here. Unlike this
crossword from Electronics World magazine (and most others for that matter),
my puzzles have only hand-picked words related to engineering and science...
 Guerrilla RF, a leading provider of high performance
MMICs, today announced it has received volume production orders for its premier
ultra-low noise amplifier (Ultra-LNA)
devices with industry-leading noise figure, gain and linearity. The GRF2051, along
with the higher gain GRF2052, support a wide range of high performance LNA applications
including macro base stations, small cells, distributed antenna systems (DAS) and
other high performance applications requiring the absolute lowest possible NF along
with the highest possible input-referenced linearity."Guerrilla RF is pleased...
 Once again, electronics and overall tech
visionary
Hugo Gernsback prognosticated in the 1930s what was then a pipe
dream but what is today commonplace - remote control of multi-functioned apparati
via secure wireless digital communications. Adolph Hitler had risen to power a year
earlier and precursors of what would officially become World War II in 1937
had nations thinking about what kinds of technologies would be necessary should
the little mustachioed dictator decide to invade his neighbors' countries in an
attempt to rule over the Earth. That this was so is apparent in many magazine articles
in the decade of the 1930s: The Saturday Evening Post, Life,
Popular Mechanics, and even Good Housekeeping...
 "Essentials of RF and Microwave Grounding,"
by Eric Holzman. Grounding is a widespread and serious problem in microwave and
RF engineering and, up until now, there hasn't been a practical, authoritative resource
dedicated to the topic. This first-of-its-kind volume offers professionals a comprehensive
understanding of the proper grounding techniques to use when working on varied microwave
circuit and antenna design projects. Practitioners learn what problems can occur
when grounding design is inadequate, and how to avoid them. The book covers a wide
range of critical topics, from the fundamentals of low frequency...
 Fairview Microwave Inc., a supplier of on-demand
microwave and RF components, has released a complete portfolio of coaxial
high reliability power amplifiers with broadband frequencies ranging
from 0.5 MHz to 20 GHz that can operate over extreme temperatures across -55°C to
+85°C. These high-rel amplifiers are commonly used in demanding environments for
applications involved with electronic warfare, instrumentation, military communications,
radar, point-to-point radio, telecom, test & measurement, medical, and SATCOM
industries. The new families of hi-rel power amplifiers from Fairview are designed
to overcome the electrical...
 While reading through this article on
copper-oxide rectifiers, I am once again reminded of how much
we take for granted the conveniences of electrical test equipment on today's shop
benches. The advent of FET-input multimeters was a huge step forward because the
meter input impedance is so high that it has practically no impact on the circuit
being measured. Prior to that, most simple meters drew their power from the circuit
under test, thereby altering the true value of current or voltage being measured.
Of course there were vacuum tube voltmeters (VTVM)
with high input impedances, but few hobbyists or laymen could afford them. This
piece reports on how the advent of a non-tube-based rectifier permitted AC measurements
to be made by DC-driven d'Arsonval meter movements so as to not excessively...
 Keysight Technologies today expanded its PAM-4
measurement solutions with support for PAM-4 data formats and built-in error counters
on the M8000 Series
BER test solutions. PAM-4 support and the ability to integrate a device's built-in
error counter helps R&D and test engineers characterize and test high-speed
digital receivers for the data-center networking, storage and computer industries.
R&D and validation teams characterizing next-generation digital designs face
several test challenges. With data rates continuously increasing, emerging data
center standards like OIF CEI and IEEE 802.3 Ethernet are moving to PAM-4 multilevel
signaling formats...
 NI (formerly AWR Corporation)
announces that NI AWR Design
Environment™ V12 will be featured in a host of activities at European Microwave
Week 2015 (EuMW2015), being held September 8 to 10 in Paris. New load-pull and antenna
features, ease-of-use and speed enhancements and third-party integrated flows will
be on display in Booth #E112. In addition, key new features will be showcased in
several MicroApps presentations and at the combined European venue of AWR Design
Forum 2015 (ADF)/European User Group Meeting...
 The 6-way power divider model
WMPD06-0.5-6-S is the newest edition to the 500 - 6,000 MHz
family of power dividers from Werbel Microwave LLC. This unit comes with SMA connectors;
type N is also available. Measures 9.0 x 6.0 x 0.9 inches. Input and output return
loss is -11 and -15 dB typ. respectively, isolation is -20 dB typ. and
insertion loss is 2.2° max. Phase and amplitude balance are typically 3°/0.4 dB.
Rated ta 50 watts input power as a splitter only. Part of Werbel Microwave's
growing series...
 "Science is built up of facts, as a house
is built of stones; but an accumulation of facts is no more a science than a heap
of stones is a house." - Henri Poincaré, mathematician, in
Science and Hypothesis
A mathematics professor explained to students through various lectures and examples:
It became obvious not everyone understood after one student submitted the following
on a pop quiz:
- originator unknown.
 At least for now, I am going to only scan
and post Radio Service Data Sheets in graphical format, and run OCR on them to separate
the textual content and make it searchable. These featuring
 the
RCA Victor Model R-78 B1-Acoustic 12-Tube Superheterodyne floor
console radio and the
Philco Model 15 Series, 11-Tube Superheterodyne Chassis, are among
what has been added already, with lots more to come. There are still many people
who restore and service these vintage radios, and often it can be difficult or impossible
to find schematics and/or tuning information. I will keep a running list of all
data...
 The
TTRM1008 is a high linearity GaAs FET bi-directional SSPA suitable
for use with any modulation and signal type. It is currently utilized in UAV data
links and long range point-point COFDM video links. High speed T/R switching and
sequencing of the PA, LNA, and switch driver circuitry is performed by an on-board
CPLD, where switching timing can be adjusted in firmware based on system requirements.
The transmit section produces over 25 watts of BPSK power, and over 5 watts of 64
QAM. The unit also features a manual digital gain setting and a three color status
LED on the front panel that shows if the SSPA is in transmit or receive mode, or
if an alarm condition exists...
 It seemed weird to read of
microelectronics device density expressed in parts per cubic foot
of semiconductor substrate. Describing density that way makes some sense when considering
3-dimensional devices with vertically stacked elements, but this was in a 1963 article
in Electronics World, so that could not have been the case. The motivation, evidently
was to be able to compare microcircuit density with that of the human brain in terms
of neuron density. In fact, there is an interesting chart presented that shows the
evolution in circuit density beginning with vacuum tube circuits, progressing through
the state of the art in 1963, projecting for future years, and finally peaking with
the brain's density. Interestingly, the brain density shows as about 5x1011/ft3,
while the "nonredundant semiconductor device" limit is...
 Fairport, NY, USA: Saelig Company, Inc., announces
the availability of the USB-stick-sized
TDDS100-48
- a laboratory quality Direct Digital Synthesized RF signal source with a frequency
range of 1 Hz to 100 MHz and a minimum of 0dBm output power that is available
from its SMA female socket. The TDDS100-48 is the smallest USB-controlled DDS synthesized
source available and is priced significantly below other offerings. The high purity
source can be swept in steps as low as 1Hz between any two frequencies in its specified
range. Frequency changes are phase-continuous, so there are no glitches and phase
noise is better than -140 dBc @ 100 kHz...
 This
Famous Scientists crossword puzzle took a long time to make because
of all the names that I managed to squeeze into the matrix. The way this one works
is the person's first initial and completely spelled-out last name, indicated by
(FI+LN) in the clue, is used as the answer. For instance, filter transfer function
developer Stephen Butterworth would be written as SBUTTERWORTH. There are at least
sixteen names here with which you should be familiar. Good luck...
 Pasternack, a leading manufacturer and supplier
of RF, microwave and millimeter wave products, has expanded their portfolio of
general purpose VNA calibration kits with new 50 and 75 Ohm versions.
These new cal kits offer excellent performance characteristics that are specially
designed for the fine-tuning and calibration of sensitive test equipment in engineering
labs, production environments and quality testing facilities. All of Pasternack's
calibration kits are built to withstand years of rigorous use and provide accurate
RF equipment calibration for the life of the product. Pasternack's new line of general
purpose VNA calibration kits...
 This could prove to be a popular feature if
other RF Cafe visitors care to get involved. Yesterday,
Neil Blaho (aka "EMI Guy" - see his helmet
for proof), having seen all the vintage magazine articles and advertisements
posted here over the years, sent me an e-mail with the ads pages below attached.
Wrote Neil, simply, "I'll never admit to using these items years ago…." His statement
alludes to what many of us veteran communications electronics industry types recognize
as the uncomfortable number of years that have slipped by while we were busy making
a living and raising families. I wrote back asking him for permission to post the
images and requested a short biography that could be posted along with them. To
wit: "Greetings Neil: That's quite an interesting lineup of stuff. I'm sure there
are lots of guys like you out there who wax...
 Advanced Test Equipment Rentals (ATEC) today announced
an expansion of its authorized rental distributor agreement with Fluke Networks
to include the
Fluke Networks OptiView® XG Network Analysis Tablet, the first
tablet specifically designed for network engineers. Fluke Networks is the world-leading
provider of network test and monitoring solutions. ATEC is a leading rental company
nationwide of test equipment for telecoms, aerospace, semiconductor, consumer electronics
and many other sectors, and now the only Fluke Networks authorized rental partner
to provide the next generation...
 As the advertisement for membership in the
Official Radio Service Men's Association says, structured organizations
for people of like mind and interests have long been the hallmark of an advanced
society where there is a need for directed socialization and the 'strength in numbers'
benefit. I suppose most people reading this piece belong to at least one such association
like the Institute for Electrical and Electronics Engineers (IEEE), American Radio
Relay League (ARRL), Armed Forces Communications and Electronics Association (AFCEA),
Association of Old Crows (AOC), Electronics Technicians Association (ETA), etc.
Having significant representation in government in the form of lobbyists is essential
these days in order to obtain and retain fair treatment...
 RFMW, Ltd. announces design and sales support for Peregrine
Semiconductor's
PE42553 SPDT capable of handling 36 dBm of CW input power
and 38 dBm of pulsed power at 8GHz. The RFMW-Peregrine-9kHz-Broadband-Switch-4W-8GHz-7-23-2015.htm" >PE42553
covers a broad frequency range of 9 kHz to 8 GHz and is ideal for applications
in test and measurement products, automated test equipment
(ATE) and general purpose Tx/Rx switching. This Peregrine
switch is internally terminated for 50 ohm circuits and offers high linearity
(IIP3 is 66 dBm) for performance critical applications
such and switched filter banks...
 According to my research, in the year 2015,
there are 29 states out of 50 that issue
specialty license plates commemorating amateur radio. Those states
that do not issue specialty plates offer a vanity plate with an FCC call sign. All
require proof of call sign ownership. Some plates simply say "Amateur Radio," while
others have a graphic symbol of some sort. I expected Connecticut, being the home
base of the ARRL, might have a really nice design, but it is a simple lightning
bolt type thing - better than nothing. Vermont is the only state that uses the schematic
symbol portion of the ARRL logo. Ohio, host to the world's largest annual Hamfest,
merely says "Amateur Radio." Sheesh, how about a tent with an antenna or something,
guys? My own favorite is that of New York due to its simple but eye-catching design
that includes the...
 NI (formerly AWR Corporation)
announces that NI AWR Design Environment™ will be on display within the
NIWeek
2015 Academic Forum, 5G/RF Pavilion and two technical sessions - High-Efficiency
PAs for High PAR Signals Using an NI-Based Platform and Improving the Semiconductor
Design-to-Test Flow. Communication and radar signals have increased peak-to-average
power ratios and bandwidths for efficient spectrum use, which implies reduced transmitter
average efficiency. Doherty, supply-modulated (ET), and out-phasing transmitters
offer possible efficiency improvements. At this session, learn about various microwave...
 I had to check the publication month printed
on the cover of the latest Nuts & Volts magazine when I ran across
this article last night. It is labeled "August 2015" and not "April 2015,"
but take a look at the photo below that accompanied an article titled "Build a 50 MHz
Dipole out of Crutches" (p25). Author and amateur
radio operator Bob Fischer (WB8BEL), aka "The Antenna
Sculptor," actually fashioned a working 50 MHz dipole out of a pair of metal-framed
crutches. The ones featured in the article were purchased new, but he advises suitable
crutches can be bought second-hand for a couple bucks. Admittedly, he says, "I'm
certain this novel antenna would never survive high winds or ice loads, but it was
not built with permanent installation in mind. I think the best uses for these crutches
are teaching antenna...
 RFMW and
ParkerVision have announced a worldwide distribution agreement
for ParkerVision products and services. ParkerVision is a developer, manufacturer
and marketer of semiconductor technology solutions for wireless applications. RFMW
is a specialized, technology based component distribution organization providing
customers and suppliers with a solutions oriented sales and marketing team. RFMW
is dedicated to offering the highest levels of customer service and specialized
component-engineering support...
 Repair service businesses have always gotten
a bad rap for deliberately inflating part and labor costs - often deservingly so
- but it's a shame the honest brokers are dragged down by the scum
(or "gyps" as this article calls them). Come to think
of it, the word "gyp" is likely short for "gypsy," which is sure to offend someone
these days. Along with admonishing customers to beware of shyster servicemen, there
is an example of an orchestrated "sting" operation whereby a radio set was intentionally "broken"
in a certain way with witnesses as to the fault, and then a couple dozen repair
services were called upon to troubleshoot and fix it, then present a bill for their
work. The result is interesting, and even resulted in one guy being...
 RF Positioning: Fundamentals, Applications, and
Tools, by Campos, Rafael Saraiva. The book is organized to allow readers to
progress at a fast pace, from the fundamentals of
RF positioning, to the use of advanced tools such as artificial
intelligence algorithms and application development environments. The first part
of the book covers the fundamentals of RF localization. The second part addresses
the application of those fundamentals in several types of wireless networks and
technologies as cellular networks, Wi-Fi, Bluetooth, sensor networks, UWB, and GPS,
GNSS...
 Planar Monolithics Industries (PMI) announces
the release of 5 new products in its line of RF components. Included are a surface
mount high power limiter (18-40 GHz), and a connectorized a SP8T (20-6000 MHz) solid
state switch, a phase shifter (2-18 GHz), and two power dividers (3.1-3.5 GHz)...
 Saelig Company has introduced a new series of
ultra-miniature VCXO
that use fundamental mode crystals for superior phase-noise performance. Available
in frequencies from 1.0-50 MHz, the new G326 series VCXOs feature integrated
phase jitter of 200 fs (typical) and suit a wide
range of timing applications, such as PLLs, SONET, ATM, set-top boxes, MPEG, audio-video
modulation, video game consoles and HDTV, ONET, 10GbE, Fiber Channel, wireless repeaters,
transponders, FPGAs, data acquisition, etc. Unlike standard clock oscillators that
have a fixed output frequency...
 This is an all-star cast of
radio pioneers if there ever was one. It's not comprehensive by
any means, but most of the first-string players are here in this 1936 Radio-Craft
article. One thing I like about reading these old pieces is that they, for the most
part, are reporting on contemporary events; they are not merely a historian's interpretation
of what the original witnesses recorded. That is not to say early writers did not
editorialize, err, or outright lie about content, but I give these guys the benefit
of the doubt based on the sources. You have certainly heard of people like Hertz,
deForest, and Marconi, but what about coherer (early detector) inventor Edouard Branly and ground-breaking commercial radio broadcast
engineer Frank Conrad? Magazine editor, publisher, and inventor Hugo Gernsback properly
give a short...
 "An iron rod being placed on the outside
of a building from the highest part continued down into the moist earth, in any
direction strait or crooked, following the form of the roof or other parts of the
building, will receive the lightning at its upper end, attracting it so as to prevent
it's striking any other part; and, affording it a good conveyance into the earth,
will prevent its damaging any part of the building." - Benjamin Franklin Of
Lightning, and the Method (now used in America) of securing Buildings and Persons
from its mischievous Effects, Paris 1767. See also
Mac's Radio Service Shop - A Little Lightning story.
 The use of
intermediate frequency (IF) coils
and interstage coupling transformers were a major feature of vacuum tube based receivers.
Both served the dual purpose of impedance matching and frequency selectivity. Resistive
losses in the relatively large passive components required careful attention to
matters that affect signal sensitivity, especially in the front end where losses
add significantly to the overall noise figure. This article appeared in an early
1930s edition of Radio-Craft magazine at a time when
superheterodyne receivers were just coming into popularity and
were a new challenge for many designers...
 Pasternack, a leading manufacturer and supplier
of RF, microwave and millimeter wave products, rolls out a brand new collection
of high performance zero biased
waveguide detectors that exhibit optimum performance in Ka, Q,
U, V, E and W frequency bands. These waveguide detectors are widely deployed in
various aerospace, defense and commercial wireless applications used in instrumentation,
power detection, power monitoring, direct detection receivers, high frequency communications,
radar, SATCOM, point-to-point radio, telecom...
 EchoStar, in Englewood, CO, is looking for a
Senior RF Design Engineer who will create RF and electrical engineering designs
employed in EchoStar set top boxes. Responsibilities include RF and electrical engineering
designs employed in EchoStar set top boxes involving QPSK, 8PSK, QAM, 8VSB and future
digital communication methods, RF and electrical engineering designs involving MoCA,
RF4CE, Bluetooth, WiFi, and other wireless networking technologies, use and apply
RF, Digital, Power, and Analog principles and design techniques, circuit design
from specifications, part selection, schematic entry, layout, optimization, validation,
to final mass production...
 At least for now, I am going to only scan
and post Radio Service Data Sheets like these featuring the
Zenith Challenger Model 740 10 Tube Battery-Operated Superheterodyne
floor console radio and the
Clarion 5 Tube Model 423; 6 Tube 470, 471 and 472; and 10 Tube 480
radio in graphical format, and also run OCR on them to separate the textual content
and make it searchable. There are still many people who restore and service these
vintage radios, and often it can be difficult or impossible to find schematics and/or
tuning information. I will keep a running list of all data sheets to facilitate
a...
 News services have been busy lately reporting
on the latest feat of America's national space agency's resounding success with
its
interplanetary space probe's closest encounter with our solar
system's most remote [minor] planet. Prior to the
flyby, even the most powerful Earth- and space-based telescopes could never resolve
more than a few lightly contrasted splotches on the celestial orb's surface, and
its largest moon was a few pixels worth of indeterminate light. All that changed
on July 14, 2015. We now have, for the first time ever, high resolution images of
the surface, and are in the process of collection terabits worth of additional physical
data from onboard instruments. No doubt many Ph.D.'s will be earned through assimilation...
 RFMW, Ltd. announces design and sales support
for a highly selective, LowDrift™ BAW diplexer created for use in Band 1 and
Band 3 uplinks. The Qorvo
TQQ1231 provides 60 MHz of bandwidth centered at 1950 MHz
and 75 MHz of bandwidth centered at 1747.5 MHz. Insertion loss for both
bands is 3.8 dB. BAW technology allows the Qorvo TQQ1231 to handle 30 dBm
of input power making it suitable for LTE infrastructure like BTS transceivers/repeaters
and high performance receivers. The TQQ1231 requires no external matching and is
offered in a 3x3 mm SMT package...
 This advertisement would never pass muster
with the politically correct crowd of today! Even though, as with the Washington
Redskins football team, Red Man chewing tobacco, Indian Motorcycles, Land O'Lakes
food company (see a huge list of official company
trademarks with Indians in them),
American Indians are without exception used as a depiction of
strength, high quality, high integrity, and beauty, a very, very, very tiny minority
of rabble rousers are having their way with the vast, vast, vast majority. Somehow
that has become the norm in society today. If the goal is to upset everyone and
to pit good people against each other, they...
 The old saying "Ignorance is bliss," is often misinterpreted as a happy thing
in that keeping one's mind free of uncomfortable facts and details makes for a more
content existence. It was probably some tyrannical statist ruler who came up with
the line in hopes the peons would simply comply with his edicts while trusting those
'in the know' to look out for their welfare. We see a lot of that today in all societies
- both controlling megalomaniacs and willing dupes. A more realistic interpretation
of the saying impugns the target as a figurative lemming who will go over a cliff
with a smile on his face as long as everyone around him is doing the same - while
praising the one who inspired the suicidal behavior. This report in a 1949 edition
of Radio & Television News includes a photo of an
RCA TV tube factory where part of the manufacturing process involved
workers (mostly women) handling...
 Through its Isolink subsidiary, Skyworks introduces
a low-loss, high performance wideband DC-6 GHz hermetic GaAs SPST non-reflective
switch. The
ISO13316 is ideal for high reliability space, satellite, and defense
applications. The device performs with 45 dB isolation at 2 GHz and low loss of
1.1 dB at 6 GHz. Testing is available to the screening requirements of MIL-PRF-38535
Class B and S, in addition to the required QCI. The ISO13316 die is produced with
Skyworks' GaAs pHEMT process that has shown radiation tolerance to 100 kRad...
 Black Friday is known to most modern-day people
as the frenzied first day of Christmas shopping season on the day after Thanksgiving
(the 3rd Thursday of November). It is named so because supposedly on that day many
retailers finally turn the ink in their accounting books from red to black (net
loss to net profit, respectably). However, there was an infamous
Black Friday that occurred in the Fall of 1869, when the US. stock
market experienced a severe crash. Many know of the 1929 crash that precipitated
The Great Depression, but the other Black Friday, per this historical article from
a 1948 edition of QST magazine, caused its own 'great depression' in wireless
communications pioneer
DDr. Mahlon Loomis. Dr. Loomis was a dentist whose side
profession was being an electrical experimenter...
 NI announces that
NI AWR Design Environment™
V12 has been awarded the Microwave Journal Magazine 2015 Most Valuable Product
(MVP) for its productivity enhancements that enable
RF and microwave designers to streamline their design process, improve end product
performance and accelerate time to market. V12 emphasizes user productivity by focusing
on the design flow process for designers of all types of high frequency electronic
components, circuits and systems. Enhancements include new amplifier, antenna and
radar-specific features...
 The world is a scary place. Someone or something,
somewhere, is watching most of what you do in public. Whether it be a traffic
or parking lot surveillance camera, a phone call, a text message or e-mail, it is
safe to assume it is all connected to an NSA (USA),
GCHQ (UK), MSS (China),
GID (Saudi Arabia), or MID
(Russia), a computer and/or human in one or more countries is privy to your
activities. They know, for instance, that you are currently reading this article
on RF Cafe.com. This interesting 'infographic' appears
...
-
How to Prepare for the Second
Interview
-
The Work-Life Equation: Solving
the Sad Office
-
Smart Career Advice for the
Class of 2015 <more>
 It always amazes me how many people are notified
of having won a choice of a FREE, recently published engineering book from top publishers
like Artech House,
McGraw Hill, and
Cambridge University
Press, but never respond. Each month for the past 8 years I have contacted 1
or 2 people to apprise them of having won the
RF Cafe Book Drawing,
but probably 1/3 never respond. Maybe my e-mails are being routed into their spam
folders. I do not send unsolicited e-mail, so all have received a message from me
previously after having order my
software. Please, for your own sake, if you have ordered during
the month, be sure to watch your inbox at the beginning of the next month - you
might be a winner!
 PMI Model No.
PS-255-2G18G-8B-SFF is a 2.0 to 18.0 GHz 8-Bit Digitally
Controlled Phase Shifter with capability for phase shifting from 0° to 255° with
resolution as fine as 1.0°. This unit has a typical insertion loss of 18 dB
and a typical VSWR of 2.5:1. The DC Voltage requirement is +12 V to +15 V
with typical current draw of 200 mA. The unit is supplied in a housing measuring...
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