Betatronics®

This is Baud Rate Useage Poll page

* I232 Communication Components for RS232 *
* Electrical Isolation, Fast Data Transfer, and Long Cables. *

Table of Contents
HOME I232 I232 Photos 1-Wire® Components 1-Wire® Photos
CAT-5E (waveforms) NOISE and GROUNDING TIMELOG-16
MISCELLANEOUS PHOTOS USEFUL INFORMATION Baud Rate Useage Poll

INFORMATION on Henry Ford Museum, Greenfield Village, & Ford Rouge Factory Tours at www.hfmgv.org

Baud Rate Useage - Distribution Curves.
Following are results from two different polls that I initiated on CNCZONE.


P1 --- Distribution Curves of Baud Rate Useage.
1 - 2400, 2 - 4800, 3 - 9600, 4 - 19.2k, 5 - 38.4k, and 6 - 115.2k .


Background:

This is not a scientific survey, but it does provide some useful information. This is based on a sample of respondents that chose to respond, and thus can be highly biased. Also the limits on the two polls were different.

The first poll was for HAAS users and was located in the HAAS section of CNCZONE. Each respondent was allowed only one vote, and their identity was visible. These were my mistake. I should have allowed multiple votes because a single respondent might operate different machines or distances at different baud rates. By exposing identities some people may not have voted.

The second poll was in the POLL section of CNCZONE where more non-HAAS users might be present and was specified for non-HAAS machines. The two errors of the first poll were corrected here. Otherwise the poll question was the same as in the HAAS section, except hopefully excluding HAAS machines.

Before initiating these polls I had ask the qualitative question of HAAS salesmen -- what is the typical operating baud rate? -- and the response was 9600 baud. Look how correct their answer was.


Several interesting conclusions:

(1) Very similar results for the two polls. I would have expected a greater density for HAAS in the high baud rates. This is because HAAS has always provided high baud rate capability. Until mid 1996 HAAS's maximum was 38.4k, and after that 115.2k was maximum. Many other machines top out at 9600 or 19.2k.

(2) There is certainly a group, about 20%, that understands the value of using 115.2k and use it.

(3) Why are not more HAAS users working at 115.2k?

If you only send small files, 1k to 5k, then it is a don't care case.

For larger files here is what happens:

At 9600 baud rate the byte rate is about 960 bytes per second, about 1 second for a 1k file.
If your file size is 100k, then it is 104 sec or 1.73 minutes.
At a 1 meg size, we are about 17 minutes, and
10 megs is about 170 minutes or 2.8 hours.


Go to 115.2k baud and times are about 12 times better.
100k is 8.7 sec,
1 meg is 1.4 minutes, and
10 megs is 14 minutes or 1/4 hour.

I suspect many users to not understand what higher baud rates can do for them.


Following is the raw data:

HAAS poll non-HAAS poll Baud rate Votes Percent Votes Percent 2400 4 3.9 4 4.4 4800 16 15.5 15 16.5 9600 37 35.9 42 46.2 19.2k 13 12.6 6 6.6 38.4k 10 9.7 8 8.8 115.2k 23 22.3 16 17.5 Total 103 91 Number views 7022 1524 Number of comments 56 9

Betatronics®

PO Box 1288, Ann Arbor, MIchigan 48106-1288
voice 734-930-6136
This web site is http://www.beta-a2.com      Our e-mail address is info@beta-a2.com
Copyright©   2007-2014   Gordon A. Roberts    All rights reserved.     141201-2140