Turning a 1/4 wave vertical upside down
 

On 12/17/2013 4:45 PM, Jeff Liebermann wrote:
On Tue, 17 Dec 2013 07:42:01 -0500, Jerry Stuckle
wrote:

Actually, if you have the right equipment, you can narrow it down in a
very short time.

What is the right equipment? A portable spectrum analyzer is not in
my budget and my bench test equipment is too heavy for sniffing in the
field. I'm fairly well equipped for 2.4GHz wi-fi interference, but
not for HF.


Most cable-related problems will show up on a certification tester such
as the Fluke DTX CableAnalyzer (the one we use). Others can be isolated
with a spectrum analyzer in conjunction with a (actually, several)
directional antenna(s). Portable spectrum analyzers are pretty easy to
carry around.

If you're in this as a business, both of the above are a necessity for
proper installation.

It seldom takes us more than an hour to find RFI
problems, and most can be done in 10-15 minutes. It never takes us
days, even in large installations.

Impressive. I assume those are continuously generating RFI sources,
not sources that appear intermittently or drift all over the place as
they warm up. I spent about a month chasing down a noise source that
turned out to be the 24v battery charger on a diesel generator. Some
grid tied solar controllers seem to be problems and take some time to
find because they can be miles away. Fortunately, they're usually
easily fixed with the manufacturers optional filter kit. It took me
about a week to determine that my weather station was the source of
some 20 meter trash. The problem was that it only generated noise
when running on the internal backup battery, and not on AC power. The
ones that disappear when the AC power is temporarily turned off are
usually quite easy. The one's that don't take me much longer to find.



Not at all impressive. We have the right equipment to locate problems.
But then our customers don't expect us to chase down 24v battery
chargers on diesel generators. We chase down stuff in our equipment; if
it isn't our stuff we will track it down for them - but we charge by the
hour (and it's a rather hefty charge).

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.

==================

Turning a 1/4 wave vertical upside down
 

On 12/17/2013 10:29 AM, Jeff Liebermann wrote:
On Tue, 17 Dec 2013 08:28:16 -0600, amdx wrote:

I like my Foxnews network, otherwise dropping cable would
be easier.

When you buy a Roku or similar screaming media player, you get a mess
of "channels" with it. All they do is point to sources of streaming
media all over the internet. FoxNoise is one of those:
http://www.roku.com/channels/#!details/2946/fox-news-channel

I did a short search of IPTV and only found Kansas
has googlefiber with a managed IPTV service. I'm not sure what
that all means, but the little reasearch I did, I don't think I could
have Foxnews on IPTV via Netflix, yet.

IPTV simply means watching television over something that spits
internet protocol packets. For example, I watch TV over a rather
slothish 1.5Mbit/sec DSL line. Netflix and some others adjust their
compression and speed to match the line speed, so they work just fine.
Other's just belch at higher rates resulting in the dreaded
"buffering" delays. Still others insist on downloading short clips
(about 5 min) into the media player buffer, before playing. IPTV is
far from a perfect replacement for cable or satellite TV, but it's
getting better.

A few more details...

If you're into playing recorded videos, look into setting up a Plex
media server:
http://www.plexapp.com

Netflix does not do local programming. So, if you want that, setup an
outside TV antenna and watch OTA (over the air) TV.

To me, the real benefit of watching Netflix over cable or satellite TV
is the lack of commercials.

As I've said before, my kids got Netflix and never concerned
themselves with cable.

Good. The kids can set it up for you.

Mikek
PS. I'm mulling over the logistics of sending an ice cream cone from Fl.
to Ca. :-)

A gift certificate from the local dispensary will suffice:
http://www.lovemariannes.com
I'm partial to (dark) chocolate chip.


I was hoping you wouldn't think of a gift certificate! ;-)

btw, is Sam a relative?
Mikek

Turning a 1/4 wave vertical upside down
 

On Tue, 17 Dec 2013 20:51:07 -0600, amdx wrote:

Mikek
PS. I'm mulling over the logistics of sending an ice cream cone from Fl.
to Ca. :-)

A gift certificate from the local dispensary will suffice:
http://www.lovemariannes.com
I'm partial to (dark) chocolate chip.

I was hoping you wouldn't think of a gift certificate! ;-)

No problem. I accept bribes, gratuities, certificates of depost, and
letters of credit, for most any form of monetary exchange. Cash is
also acceptable, but specie (gold) is much better.

Was it you or someone else that wanted an HP8555a plugin? I can't
seem to find the relevent posting.

btw, is Sam a relative?

No, but we shared the same cardiologist and hospitals, which
ocassionally mixed our appointments, records, insurance claims, blood
tests, etc. We also ended up with each others USPS mail. Marianne's
Ice Cream is only about a 5 minute walk from my palatial office, which
requires some self control to not over-indulge too often.

Unfortunately, Sam Lieberman died last month. He'll be missed:
http://www.santacruzsentinel.com/food/ci_24656886/samuel-lieberman-iconic-santa-cruz-ice-cream-maker



--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558