Timewave DSP-232, Operating Manual, Page: 38 / 271

Chapter 4 Terminal Interfacing
AFILTER works regardless of mode, or COMMAND/CONVERSE/TRANSPARENT status. Leave AFILTER OFF
during binary file transfers.
ALFDisp ON
|
OFF
Default: ON
Host: AI
ON
A line feed is sent to the terminal after each ( RETURN ).
OFF
A line feed isn’t sent to the terminal after each (
RETURN
).
ALFDISP
controls the display of (
RETURN
) characters received, as well as the echoing of those that are typed in.
With
ALFDISP ON
, the DSP adds a line feed (
LF
) to each (
RETURN
) it sends to the terminal, if needed . If an
LF
was received either immediately before or after a ( RETURN ), ALFDISP won’t add another LF . Use the DSP’s
sign-on message to determine how ( RETURN )s are being displayed.
Note : ALFDISP affects your display, not transmitted data.
♦
Turn ALFDISP ON if the DSP’s sign-on message lines are typed over each other.
♦
Turn
ALFDISP OFF
if the DSP’s sign-on message is double spaced.
♦
ALFDISP is set correctly if the DSP’s sign-on message is single spaced.
ANalog
Immediate Command
Host: An
ANALOG is an immediate command that switches your DSP-232 into the ANALOG mode.
Most DSP users will not use this mode the way Packet and Baudot are used. Rather, application display programs
will use this mode to process FAX signals, allowing gray scale and color images to be displayed. The Analog mode
paases data for communications modes that require “gray scales” such as FAX. ANALOG is simplar to the
DSPDATA mode, except that in ANALOG the unit samples on a timer interrupt. (Also see the ANSAMPL
command)
Analog requires an 8-bit Analog type of DSP modem that samples and digitizes the analog information. After the
signal is sampled, it is sent to the RS-232 serial port to the host computer for processing.
Presently, Modems 17, 18, and 19 are available for use in the Analog mode. Modem 17 is designed for HF FM
facsimile operation and digitizes the audio frequencies from amplitude of a 1,300 Hz to 2,100 Hz. Modem 19 is
designed for HF FM facsimile operation and digitizes audio frequencies from. Modem 18 is designed for satellite
APT facsimile operation and digitizes the 2,400 Hz audio carrier.. All Analog modems digitize the samples into b
bit binary quantities with the lowest frequency or amplitude represented by $00 and the highest represented by $FF.
Analog modems may also be used in the DSPDATA mode.
To use the Analog mode, the computer program should first ANSAMPLE, then enter ANALOG mode. ANALOG
initializes in the standby receive state. The following commands function in other operating modes and now control
the ANALOG mode as well.
L (Lock):
Force Data receive. (Start the Digitizing Process)
R (Receive): Standby receive. (Stop the Digitizing Process)
X (Xmit):
Data transmit. (Not yet implemented)
The TRACE command also functions in Analog mode. TRACE OFF (default) sends the data as one binary
character per sample. TRACE ON causes the data to be sent to the user as a 2 hex characters per sample for test
purposes. User BIT 20 (UBIT 20) also affects the data presentation.
ANSample n Default: 2000
Host: As
“ n ” 900 to 65535 decimal specifies a number to be loaded into the DSP to control the Analog mode sample rate.
September, 05 4-5