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Does everyone who uses DTN have this Port? If not, how is their data collection? I
am about to switch to DTN and appreciate and "downfalls" of Dtn.
Gil
Chris Baker wrote:
> The tc 920 is an ISA board that runs fine under Windows 98 and Windows NT. The
> tc 920 uses 16750 UART, as opposed to the 16550 UART sold in PC's today. 16750
> UART provides a 64-bit com port buffer as opposed to a 16-bit buffer for the
> 16550. That gives the computer more time to completely service the com port
> and avoid overflow errors. tc 920 also has a special driver for the tc 920
> card which is supposed to provide some additional advantages. The tc 920 is
> software configurable as opposed to one competitor I looked at which requires
> configuring on the board.
>
> As far as I know, the tc 920 or equivalent is ALWAYS recommended for DTN
> satellite feed. For those not familiar with DTN satellite, as I understand it
> DTN transmits two satellite feeds which somehow your satellite sends to your
> computer as a single feed. DTN has a 56K baud prices-only satellite feed and a
> 38.4K baud satellite feed for text.
>
> The tc 920 is also supposed to be useful if your modem supports
> modem-to-computer speeds faster than 56K baud, which some V.90 modems do
> support. My modem does but when I tried a tc920 for my modem I couldn't see
> any difference.
>
> In Windows NT you have to enable a Plug-and Play driver, as they explain, which
> can sometimes confuse NT a little, but it can be sorted out. For Windows 98
> you get a handy utility program to display the Bits per second of any com port.
> That way you know the com port is functioning and how fast. In the case of
> BMI, it shows BMI is maxed out much too often during the day, which means ticks
> are being delayed. With all the text BMI transmits now, BMI really needs to go
> to a dual feed - even dual 38K baud.
>
> There is also a 2 port version of tc 920 which uses two IRQ's.
>
> --- Chris
> -----Original Message-----
> From: Sentinel <rjbiii@xxxxxxxxx>
> To: chrisbak@xxxxxxxxx <chrisbak@xxxxxxxxx>; Omega List <omega-list@xxxxxxxxxx>
> Date: Saturday, March 27, 1999 12:25 PM
> Subject: Tick Counts and Serial Ports
>
> >In counting ticks I have noticed that DTN sends ticks that are equal to the
> last
> >tick for an hour or more after the market, closes and not a consistent time. If
> >you look at the Sessions Tab for a symbol you will see the session time and
> >Dribble, as well as Settlement. I seem to collect ticks for 2hrs. 30 min after
> >most sessions. So to do a tick count comparison wouldn't we also have to
> compare
> >the time of the first tick and last. Or the number of ticks between certain
> >hours of the day. The only ticks that show on a chart are the ones received
> >during the session time.
> >
> >There also seems to be an issue of Hardware using DTN and the UMDS or Global
> >Server. The techies at DTN tell me that the amount of overflows on the box is
> >due to the shear volume of data they have available and that we will miss
> ticks,
> >using a standard 16650 URT
> >serial port at maximum baud rate of 115,200. They now recommend that we use a
> >High Speed
> >Serial Port card. DTN is recommending the 920 Card from
> >http://www.pacificcommware.com/texport.html Its about 79.00, dose anyone have
> >experience with it?
> >
> >
> >
> >____________________Reply Separator____________________
> >Subject: Re: Update TS2000i Bill Cruz
> >Author: Chris Baker
> >Date: 3/27/99 11:18 AM
> >
> >-----Original Message-----
> >From: gl <garywl@xxxxxxxx>
> >To: omega list <omega-list@xxxxxxxxxx>
> >Date: Saturday, March 27, 1999 1:24 AM
> >Subject: Re: Update TS2000i Bill Cruz
> >
> >
> >>if you look at historybank.com i downloaded 3257 spm9 ticks
> >>
> >
> >I'm in EST, which Omega is in, and I got 3701 ticks with Global Server (The
> >Global Server counts ticks received since midnight). I've never used
> >HistoryBank.com - what time does Omega update the History Bank?
> >
> >However 3701 ticks is only for EST - since midnight occurs later in time zones
> >west of EST, it seems the Global Server should collect fewer ticks for SP since
> >there are fewer trading hours until the close. However the number of ticks
> in
> >the Day symbol DSP should be the same for all users using the same feed.
> >
> >
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