Hello Mark,
Yes, the external 5V antenna power works as before on the Mini-t, the internal
3.3V and external 5V supplies are diode-ored together to support either or.
A Waas only mode would be very difficult to do, maybe through a high mask
angle.. But interesting idea to look into..
Thanks
On 07/20/2012 07:42 AM, Chris Albertson wrote:
On Thu, Jul 19, 2012 at 5:47 PM, Rick Karlquistrich...@karlquist.com wrote:
Hysteresis does nothing to eliminate jitter or temperature
Maybe, but it is absolutely needed if there is any noise on the
signal. A perfect comparator with zero
On 07/20/2012 04:23 AM, Michael Baker wrote:
Time-nutters--
Didier Juges asked:
What does that do to the focussing properties
of the dish?
I have seen several descriptions of how the dish
needs to be shaped in order to develop the orbital
time-delayed angular
If the signal is delayed in time by the dish, then there will be no phase
coherency, and it is the phase coherent properties of a parababoid that make
it the most commonly used type of reflector for microwave signals.
A direct analogy between optical signals propogating in a fiber and RF signals
KEX 1190 in Portland Oregon has been 30 Hz low for several hours.
The first field is Unix time, seconds since 1970 GMT.
The 3586B is using the Thunderbolt's 10 MHz for its frequency reference.
1342774022 -45.416000 119.10
1342774112 -45.774000 119.10
1342799196 -48.755000
As I recall you can command it to centre on the counted frequency. Thus, afc
when making measurements in 20 Hz
Very odd that a standard AM broadcast should be off by more than a few Hz.
In fact, in the 60s, when BC stations had real blue papered engineers on
watch, we found the TX crystals were
Hmmm!
Subpart H--Rules Applicable to All Broadcast StationsSec. 73.1545 Carrier frequ
ency departure tolerances.(a) AM stations. The departure of the carrier frequenc
y formonophonic transmissions or center frequency for stereophonictransmissions
may not exceed plus-minus 20 Hz from the
cq.k...@gmail.com said:
I do not want to spend good money on another oscillicope if I can help it,
but I do want to see, or at least be remotely aware of clock slips/walks
and other anomalies. I am thinking about building an embedded system to
automate monitoring, configuration, and
OK, very interesting. Now is it possible to measure/verify this? I think
that using any test equipment, the comparator-style approach is
unavoidable: the trigger of the scope or the counter cannot be an
amplifier/limiter. How to tell what is up to my design under test and what
is the trigger
Hi
Simple test:
1) Run sine wave into a power splitter
2) Run one port to your limiter / zero crossing detector / what ever
3) Run other port from the power splitter into the reference port on a DTMD,
5125, or (better yet) TimePod.
4) Route the output of the limiter to the input port on the
I see that from one way or the other, we always end up in a TimePod. OK,
then the TimePod has no comparator, no trigger but has A to D conversions.
Is the A/D conversion process supposed to be threshold-free? Maybe, in this
case, the DTMD is the only analog and threshold-free way.
On Sat, Jul 21,
On 07/21/2012 12:09 AM, Azelio Boriani wrote:
OK, very interesting. Now is it possible to measure/verify this? I think
that using any test equipment, the comparator-style approach is
unavoidable: the trigger of the scope or the counter cannot be an
amplifier/limiter.
If you like to verify what
Yes, using a 'scope and the persistence it seems possible to visualize
the results.
On Sat, Jul 21, 2012 at 1:03 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 07/21/2012 12:09 AM, Azelio Boriani wrote:
OK, very interesting. Now is it possible to measure/verify this? I think
that
(From a month ago.)
albertson.ch...@gmail.com said:
Take my word for it, the T-Bolt is not able to drive a 100 foot long twisted
pair cable
I don't think that's quite the right way to phrase it.
What type of twisted pair were you using and/or what sort of setup did you
try? How well did
albertson.ch...@gmail.com said:
Hysteresis does nothing to eliminate jitter or temperature
Maybe, but it is absolutely needed if there is any noise on the signal. A
perfect comparator with zero hysteresis would dither on every zero crossing.
Hysteresis doesn't eliminate the dither from
On 07/21/2012 01:28 AM, Azelio Boriani wrote:
Yes, using a 'scope and the persistence it seems possible to visualize
the results.
Exactly.
It's very instructive to see the traces separate appart as result of
deterministic jitter, or just see the soft edges from the random jitter.
I forgot
On 07/21/2012 01:41 AM, Hal Murray wrote:
albertson.ch...@gmail.com said:
Hysteresis does nothing to eliminate jitter or temperature
Maybe, but it is absolutely needed if there is any noise on the signal. A
perfect comparator with zero hysteresis would dither on every zero crossing.
On 07/21/2012 01:31 AM, Hal Murray wrote:
(From a month ago.)
albertson.ch...@gmail.com said:
Take my word for it, the T-Bolt is not able to drive a 100 foot long twisted
pair cable
I don't think that's quite the right way to phrase it.
What type of twisted pair were you using and/or what
The Thunderbolt has no problem driving a 100 feet 50 ohm coax cable, aside
from the obvious impedance matching problem (the TB has maybe 5 ohms output
impedance), so I am not sure in what context that remark would apply.
Didier KO4BB
Hal Murray hmur...@megapathdsl.net wrote:
(From a
On 07/21/2012 03:30 AM, Hal Murray wrote:
albertson.ch...@gmail.com said:
Maybe, but it is absolutely needed if there is any noise on the signal.
A
perfect comparator with zero hysteresis would dither on every zero
crossing.
On 07/21/2012 01:41 AM, Hal Murray wrote:
Hysterssis will
I see that from one way or the other, we always end up in a TimePod. OK,
then the TimePod has no comparator, no trigger but has A to D conversions.
Is the A/D conversion process supposed to be threshold-free?
Hey, everybody needs at least one or two TimePods. :) You can use a TimePod
or TSC
Yes, of corse twisted pairs can handle fast signals. Gigabit Ethernet
over cat-5 cable is a good example.
What I meant when I wrote the below is that a bare t-bolt PPS output
can't drive 100 feet of cat-5 cable when the far end is connected to
to typical 74LSxxx t/l chip. The pulse get smeared.
I don't think the problem is with the tbolt, see
http://ko4bb.com/Test_Equipment/CoaxCableMatching.php
There is a picture of the tbolt driving 50 feet of average quality 75 ohm
cable.
With the right termination, and if the cable is good enough, there should be no
problem.
If the cable is
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