21
Any single parameter in a register can be
interrogated independently. Simply type the
register designation followed by a single
question mark. A response shown at the right
for the typed command:
PI?
8
.
PROGRAMMING SYNTAX
How to Type
First, with your back straight and feet squarely on the floor, place
your fingers in the ready position
In these programming instructions the
exact
ASCII syntax to be
entered on the keyboard will be given in the font used in this
example:
TEXT=HELLO
8
. Specifically, the word TEXT, the equal
sign and the word HELLO would be typed, followed immediately by
pressing the Enter key. We will use
8
as the symbol for Enter.
Take time to type deliberately and slowly. Even at 9600 baud, some
delays are inherent in the communications between the computer
and the encoder. One characteristic of typing too quickly will be the
omission of line feeds in responses returned from the encoder.
Using ALL CAPS
Programming commands should be typed in ALL CAPS (capital
letters) and messages should be kept as simple as possible. Though
the encoder will accept lowercase letters and all ASCII punctuation
in the PS and RT fields, some RDS radios have limited character
sets and may display ambiguous lowercase characters or gibberish.
To assure readability, keep the keyboard Caps Lock key engaged
and avoid fancy punctuation. Smileys are not a good idea.
Correcting
Mistakes
Under
HyperTermnal
, use the Enter key to drop to a new line, if
required, and use either the Backspace key or the keyboard s
directional arrows to navigate within a text entry. Overtyping an
entry will automatically replace the previous characters. What is
shown on the screen before the Enter key is pressed is what will be
sent to the encoder.
Echo
Your computer screen will display what has been echoed by the
encoder as data is entered. Each character typed on the keyboard
will be sent to the encoder, which will turn it back around to be
shown on the monitor screen. This round trip gives continuous
confirmation of 2-way communications.
The return data path is not essential, however. The Model 712 will
accept programming commands on a receive-only basis. For
example, a studio-transmitter radio link (STL) may include 1-way
data transmission that could be used to address the encoder..
If double characters appear when typing, your terminal has been
configured for local echo. Rather than defeating the echo function of
the encoder, local echo should be turned off. This is usually a
software command in the terminal or terminal program. Local echo
may be used with a 1-way link.
