Timewave DSP-232, Operating Manual

Page: 148 / 271

Chapter 8 ASCII and Baudot Operation
In response to requests from European customers, the “national” ITA#2 characters unassigned in the US have been
made available for both transmission and reception. FIGS-F, FIGS-G and FIGS-H have been assigned characters
according to standard use and are shown below. Note that some national alphabets use these characters for accented
letters not appearing in English.
Baudot ITA #2 U.S.
Character
CODE
0
CODE
1
FIGS-F | !
FIGS-G { &
FIGS-H } #
3rd-Q q
CODE 1 : US Teleprinter
In Morse, this has no effect—the DSP will use the International Morse Code and not the American Morse code. In
Baudot and AMTOR, the US teleprinter character set shown below is used. Users of CODE 1 should be aware of
the following:
The US teleprinter code (
CODE 1 ) makes the “!”, “$”, “’” and “#” characters available in Baudot and AMTOR.
The WRU character, “=”, and the “+” characters are lost when set to
CODE 1
. Since there is no “+” character in the
CODE 1 character set there should be no way to turn over the AMTOR link and change from ISS to the IRS. To
avoid this problem, the DSP sends a FIGS-Z when the “+” key is pressed in AMTOR and responds to the reception
of the “FIGS-Z” “?” sequence so the direction of traffic can be reversed.
US Teleprinter character set.
Lowercase set UPPERCASE SET
1 2 3 4 5 6 7 8 9 0 -
!# $&( )
Q W E R T Y U I O P Q W E R T Y U I O P
A S D F G H J K L ; ’ A S D F G H J K L : ’
Z X C V B N M , . / Z X C V B N M , . ?
The differences between ITA #2 and US teleprinter codes are listed below:
Baudot ITA #2 U.S.
Character CODE 0 CODE 1
FIGS-D WRU $
FIGS-F |
!
FIGS-G { &
FIGS-H } #
FIGS-J BELL ’
FIGS-S ’
BELL
FIGS-V = ;
FIGS-Z + ”
3rd-Q q
Note that for U.S. Amateurs, the FCC regulations require that Baudot and AMTOR transmissions follow CCIR
Recommendations which require the ITA#2 (
CODE 0 ) be used. Technically, it’s illegal to use CODE 1 on the U.S.
Amateur bands. MARS operators and Amateurs outside the U.S. may find
CODE 1
useful.
CODE 2
: Cyrillic
This code causes a translation to an artificially extended ASCII so that all received characters are converted to
single ASCII characters. The character set used prior to July 1991 was arbitrary, but we have now changed the
character set to one which we believe is used in the former USSR.
8-10 September, 05