MessageView 421F schematic

[rutiger]

Could you not write to a RAID rather than a single disk?

 

Sorry to have not been more accurate, precise, and clear. First, I
think I should have said "bandpass sampled" instead of undersampled.
IF output is centered at 75 MHz, +/- about 15MHz of signal BW (spectrum
from 60MHz to 90 MHz).

Sampling at 60MHz shifts that down to baseband (0-30MHz) where the DSP
begins. The 5 MHz BW I quoted is after some of the filtering in our
DSP.

I was hoping to capture analog on a multichannel recorder so I could do
repeated playback thru the RF->IF analog chain, and iteratively tweak
components (including my A/D converters), without having the artifacts
of other (possibly inferior) A/D converters corrupting my
"gold-standard" reference signals.

Digital capture also means I have to hook up 24 modulators to replay
the RF. I wanted to avoid degrading my reference signals as much as
possible. Replaying and modulating captured baseband means the next
time I look at the signals in my DSP, they will have been thru my IF
twice, plus somebody else's modulator, which munges things a bit. Thus,
capturing original Rx antenna output would be ideal.

Also, capturing the data will be expensive, as it requires rental of an
airplane for a couple of hours. Swapping disks every 2-5 minutes does
not give me much continuous, uninterrupted data to work from. (I want
to replay an entire flight segment thru certain maneuvers and across a
good strectch of airspace.)

Having said that, if there is an "easy" (affordable, off-the shelf)
RAID solution I can write to from my ADC converters (129.6 GB/minute
for at least 10 minutes), I could use that for replay into my DSP
datapath simulations. Not ideal, but far better than nothing.

Hope this better explains my needs and rationale. But as I mentioned
before, all feedback is appreciated.

Thanks again,

mj

 

[Repeating Rifle]

jjohnson@cs.ucf.edu wrote:

I need to record some real-world RF waveforms. All-digital approach
looks *very* disk intensive!

Just on general principles, you can beat down the RF signal to video using
quadrature detectors. Record the in phase video and quadrature videos on two
video channels of sufficient bandwidth. In fact, you would be best off using
A/D converter and record digitally. That, and the frequency and phase of the
carrier, should give you all the information you need. Actual waveforms
could be reconstructed in a computer, if you really need that.

Bill

 

[Mark]

If you have 8 antenna's why do you have to record 24 channels.

Can't you record the 8 signals before they go into the 2 way converters
(whatever those are)?

Saves you a factor of 3.
Mark

 

[Mike Yarwood]

"Mark" <makolber@yahoo.com> wrote in message
news:1107582077.694507.65160@l41g2000cwc.googlegroups.com...

If you have 8 antenna's why do you have to record 24 channels.

Can't you record the 8 signals before they go into the 2 way converters
(whatever those are)?

Saves you a factor of 3.
Mark

Would something like this maybe work for you

http://www.thic.org/pdf/Oct97/schlumberger.pstephens.pdf#search='schlumberger%20tape'

best of luck - Mike

 

[Dale H. Cook]

On Sat, 05 Feb 2005 17:14:25 -0600, Mama Bear <MamaBear@NoSpam.noo>
wrote:

I just dug an old General Radio Bridge 650-A out of the shed. It needs
cleaning up & refurbing. Anyone have any idea what it might be worth if I
wanted to sell it?

I haven't seen on eBay in a while, but they are common enough that I'd
say about $50.00.

Dale H. Cook, Chief Engineer, WWWR Roanoke VA, WCQV Moneta VA, WKBA
WZZI Vinton VA, WKPA WLNI WZZU Lynchburg VA, WMNA/WMNA-FM Gretna VA,
WOWZ Appomattox VA
http://members.cox.net/dalehcook/starcity.shtml

 

[JeffM]

Also I want to get another calculator
that I could program to perform functions.
I ...don't want to spend the HPXX-C model prices
Jim Douglas

Mike's right. How far do you ever wander from a PC?
http://www.google.com/search?&q=calculator-emulators+windows

BTW, sci.electronics is not a valid group.

 

[Winfield Hill]

Ed wrote...

Mama Bear wrote ...

I just dug an old General Radio Bridge 650-A out of the shed.
It needs cleaning up & refurbing. Anyone have any idea what
it might be worth if I wanted to sell it?

One sold on Canadian E-Bay last month for about $12.00 Canadian.
You can see it at:
http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=5746299543

Well, $29 US, $35.85 Canadian, actually, if anyone's counting.
Selling it in cleaned up, refurbished and tested form, along
with a 5-day right-of-return could raise the price.


--
Thanks,
- Win

 

[Sam Jacobson]

Dear all,

I am looking for a DM44 for my Tektronix 465B oscilloscope. If
anyone has one for sale, or know where I might get one, I would
appreciate you letting me know.

Thanks!

Sam

 

[Jim Yanik]

Sam Jacobson <jacobson98@earthlink.net> wrote in
news:u8bv11lp1kn3g4chafdktcu6plg85ujf9m@4ax.com:

Dear all,

I am looking for a DM44 for my Tektronix 465B oscilloscope. If
anyone has one for sale, or know where I might get one, I would
appreciate you letting me know.

Thanks!

Sam

If you have no experience in installing one,then you can possibly damage
your scope to where it's not worth anything anymore.

You are also going to need the proper ribbon cable set for the DM44 option.
And the DM44 service manual!!

I would not advise it.Buy or trade for a complete 465BDM44.

(21.5 years at TEK service centers;repair and cal of scopes,T&M,and TV
products.)
--
Jim Yanik
jyanik
at
kua.net

 

[tekamn]

I am not shure if the OP is just willing to replace the DM44 on his
465B . Or if he is going to install one on his 465B that is right now
without the dmm.

In the latter case, this would also mean some metal cut ourt in the
housing of the 465B scope. Hard to do withourt proper tools.

I'd go with Jim recommendation: Buy a complete 465B/DM44.

just my 2cts. ;-)

Andreas

 

[Sam Jacobson]

Hello all,

I am sorry for taking so long to get back to you all. It has just
been a rather busy week.

However I wanted to thank you all for the input. And, following the
consensus, I will, hold off buying a DM44 for my 465B as I do not
have the skill to install one, as well as that it simply ounds like a
bad idea trying to add a DM to the Tek.

Thanks everyone. I appreciate the help.

Respectfully,

Sam


On Fri, 25 Feb 2005 22:57:54 GMT, Sam Jacobson
<jacobson98@earthlink.net> wrote:

Dear all,

I am looking for a DM44 for my Tektronix 465B oscilloscope. If
anyone has one for sale, or know where I might get one, I would
appreciate you letting me know.

Thanks!

Sam

 

[~]

give them a fake address.





In article <MeqdnfY6cZ_ZjmrdRVn-hQ@gbronline.com>, Wes Groleau
<groleau+news@freeshell.org> wrote:

Gnarlodious wrote:
I bought a small item at Radio Shack several months ago, and the clerk asked
the man in front of me for his social security number. He began reciting it
in public but I interrupted him, telling him she didn't need his SS# and he
should never publicly announce it. A loud argument ensued with the clerk
bringing out the manager. The manager assured me it was official RS policy

Every time I try to buy something there, even if I pay cash,
they try to get my address and phone number. I always have
to argue with them. "You don't need my phone number to send
your stupid catalog, and I don't want the catalog anyway."

But they still argue they need it. Eventually I win or
I walk out with my money and no product.

 

[CJT]

~ wrote:

give them a fake address.


.... or their own. Or go on the offensive, and ask for the sales

drone's home address.

In article <MeqdnfY6cZ_ZjmrdRVn-hQ@gbronline.com>, Wes Groleau
groleau+news@freeshell.org> wrote:


Gnarlodious wrote:

I bought a small item at Radio Shack several months ago, and the clerk asked
the man in front of me for his social security number. He began reciting it
in public but I interrupted him, telling him she didn't need his SS# and he
should never publicly announce it. A loud argument ensued with the clerk
bringing out the manager. The manager assured me it was official RS policy

Every time I try to buy something there, even if I pay cash,
they try to get my address and phone number. I always have
to argue with them. "You don't need my phone number to send
your stupid catalog, and I don't want the catalog anyway."

But they still argue they need it. Eventually I win or
I walk out with my money and no product.

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.

 

[Vanguard]

"~" <~@1.2> wrote in message news:210320051234152726%~@1.2...

give them a fake address.





In article <MeqdnfY6cZ_ZjmrdRVn-hQ@gbronline.com>, Wes Groleau
groleau+news@freeshell.org> wrote:

Gnarlodious wrote:
I bought a small item at Radio Shack several months ago, and the
clerk asked
the man in front of me for his social security number. He began
reciting it
in public but I interrupted him, telling him she didn't need his
SS# and he
should never publicly announce it. A loud argument ensued with the
clerk
bringing out the manager. The manager assured me it was official RS
policy

Every time I try to buy something there, even if I pay cash,
they try to get my address and phone number. I always have
to argue with them. "You don't need my phone number to send
your stupid catalog, and I don't want the catalog anyway."

But they still argue they need it. Eventually I win or
I walk out with my money and no product.

I've seen this exact post before. It was posted long time ago and
apparently the OP likes to repeat it, or maybe Wes Groleau decided to
reply to a really old post. It's old news. Obviously if it is store
policy where they refuse to sell without an SS number, give them a fake
one (and make it obviously a fake, like 123-456-0000) or just don't buy
from them. I've been at the grocery checkout and they wouldn't ring up
an item at the price they listed on their own shelf, I don't argue, and
I'll leave the whole mess on their counter so they have the fun of
putting it all back and I walk away. There are other stores. Let them
win the argument by losing the sale. Then go call the State Attorney's
Office to find out how to file a complaint and determine what other
action you can pursue against them.

By the way, I've never had Radio Shack ask for an SS number in the 30+
years that I've purchased from them. They have asked for a telephone
number which I refuse to divulge. They persist but I refuse and simply
put it, "Do you want the sale or not?". If I'm paying cash, they don't
ever get get any personal info. They might claim they need it for
warranty purposes but the law doesn't require you to register to
exercise the warranty (you only need to prove at claim time that you
were the purchaser).

--
____________________________________________________________
Post your replies to the newsgroup. Share with others.
E-mail reply: Remove "NIXTHIS" and add "#VS811" to Subject.
____________________________________________________________

 

[CBFalconer]

Vanguard wrote:

.... snip ...

I've been at the grocery checkout and they wouldn't ring up an
item at the price they listed on their own shelf, I don't argue,
and I'll leave the whole mess on their counter so they have the
fun of putting it all back and I walk away. There are other
stores. Let them win the argument by losing the sale. Then go
call the State Attorney's Office to find out how to file a
complaint and determine what other action you can pursue against
them.

Many states (in the US at least) have laws that on failure to ring
up the posted or advertised price, the item becomes free. Even
where the law does not cover all of those cases, many firms have
such a policy. The irritating thing is when the checker, who goes
to see if there is such a posting, just rips down the sign and then
tries to deny everything.

--
"I conclude that there are two ways of constructing a software
design: One way is to make it so simple that there are obviously
no deficiencies and the other way is to make it so complicated
that there are no obvious deficiencies." -- C. A. R. Hoare

 

[Pete]

NEVER heard them require a SS#

 

[John A. Weeks III]

In article <210320051234152726%~@1.2>, ~ <~@1.2> wrote:

In article <MeqdnfY6cZ_ZjmrdRVn-hQ@gbronline.com>, Wes Groleau
groleau+news@freeshell.org> wrote:

Gnarlodious wrote:
I bought a small item at Radio Shack several months ago, and the clerk
asked
the man in front of me for his social security number. He began reciting
it
in public but I interrupted him, telling him she didn't need his SS# and
he
should never publicly announce it. A loud argument ensued with the clerk
bringing out the manager. The manager assured me it was official RS
policy

That is either not true, or it was some rouge sales person. It is
not representative either of the policies of Radio Shack or the
training that sales people receive at Radio Shack. The only possible
explination for this is that the guy was filling out a credit app,
and he asked the clerk to take down the information for him. A
Dish, Direct TV, or cellular telephone application might require
a SSI number (since you are applying for credit in those cases), but
all stores would require the same information. Hardly a Radio
Shack issue.

-john-

--
======================================================================
John A. Weeks III 952-432-2708 john@johnweeks.com
Newave Communications http://www.johnweeks.com
======================================================================

 

[Melissa]

FYI:

"The following is not copyrighted and the Caucus encourages you to make
copies and give them to anyone who unlawfully requests your number. …

"PRIVACY ACT LIMITATIONS ON SOCIAL SECURITY NUMBER USAGE

Since many people objected to extensive loss of privacy which accompanied
the use of computers, Washington responded by passing the "Privacy Act,"
Title 5 of the United States Code Annotated 552(a). It states quite simply
that, "It shall he unlawful… to deny any individual any right, benefit or
privilege provided by law because of such individual's refusal to disclose
his Social Security number." Due to it, courts have ruled, in part:

"Right of privacy is a personal right designed to protect persons from
unwanted disclosure of personal information..." (CNA Financial Corporation
v. Local 743, D.C., Ill., 1981, 515F, Supp. 942, III.)

The District Court in Delaware held that the Privacy Act:

"Was enacted for [ purpose of curtailing the expanding use of Social
Security numbers...and to eliminate the threat to individual privacy and
confidentiality posed by common numerical identifiers." (Doyle V. Wilson,
D.C., Del., 1982, 529G, Supp. 1343.)

In the strongly worded Guideline arid Regulations for Maintenance of
Privacy and Protection of Records on Individuals it is stated:

"(a) It shall be unlawful...to deny to any individual any right, benefit or
privilege provided by law because of such individual's refusal to disclose
his Social Security account number."

The Privacy Act calls for the following penalty for knowingly violating it:

"(A) Actual damages sustained by the individual as a result of the refusal
or failure, but in no case shall a person entitled to recovery receive less
than the sum of $1,000; and (B) the costs of the action together with
reasonable attorney fees as determined by the court."

It is suggested that you take someone with you when you assert your rights
under the Privacy Act. He or she will witness the incident and testify (if
necessary) to the facts.

Courts have ruled that there are only four (4) instances when Social
Security numbers MUST be used. These are:

1. For tax purposes
2. To receive public assistance
3. To obtain and use a driver's license
4. To register a motor vehicle

In any situation not listed above, simply present this document to any
person who seems to need one. Invite him or her to make a copy. Point out
the $l,000 penalty that is guaranteed upon judgment that your rights were
violated under this act. Point out that an individual may personally be
required to pay the $1,000 if he/she is aware of the Privacy Act and
refuses to follow it. In Doyle v. Wilson, the court states: "Assuming that
the plaintiffs refusal to disclose his Social Security number was a clearly
established right, where defendants could not as reasonable persons have
been aware or the right and could not have recognized that any effort to
compel disclosure of number or to deny plaintiff his refund violated
federal law, damages against defendant were barred." (Doyle v. Wilson,
D.C., 1982, 529F, Supp 1343.)

It is quite clear that the individuals must be able to show that they could
not have been aware of the Privacy Act and could not have possibly realized
that their actions were in violation of federal law in order to escape the
$1,000 penalty.

Courtesy of the Heritage Caucus"

-- 101 Things to Do 'Til the Revolution", by Claire Wolfe



--
Yours In Liberty, Melissa - Colorado, U.S.A.
http://melissasliberty.blogspot.com/

The last best hope for liberty, to give the world its first Bill of
Rights: http://www.UPAlliance.org/billofrights.htm

 

[Geoffrey F. Green]

In article <q7SdnXAWzvGN2qLfRVn-oQ@forethought.net>,
Melissa <melissa@colorado.xxx> wrote:

FYI:

"The following is not copyrighted and the Caucus encourages you to make
copies and give them to anyone who unlawfully requests your number. …

"PRIVACY ACT LIMITATIONS ON SOCIAL SECURITY NUMBER USAGE

Since many people objected to extensive loss of privacy which accompanied
the use of computers, Washington responded by passing the "Privacy Act,"
Title 5 of the United States Code Annotated 552(a). It states quite simply
that, "It shall he unlawful… to deny any individual any right, benefit or
privilege provided by law because of such individual's refusal to disclose
his Social Security number." Due to it, courts have ruled, in part:

First, the portion of the Privacy Act quoted says, in whole:

"It shall be unlawful for any Federal, State or local government
agency to deny to any individual any right, benefit, or privilege
provided by law because of such individual's refusal to disclose his
social security account number."

Note the limitation -- it only restricts a Federal, State or local
government agency. It does not limit businesses or other private
concerns. Radio Shack or any other business is welcome to require you
to provide your SSN, and you're welcome to do business elsewhere if
you decline to do so.

- geoff