Timewave DSP-232, Operating Manual

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Chapter 4 Terminal Interfacing
n 0-100 adjusts how the DSP-232 manipulates amplitude of transmitted signals on 1200 bps Packet.
Twist transmit (TWXmt) allows you to compensate for transmitter deficiencies by adjusting the amplitude of the
high tones. Entering values less than 50 allow you to lower the amplitude of the received signal’s high tone.
Entering values greater than 50 allow you to increase the amplitude of received signal’s high tone. This command
allows you to keep high and low signals at their proper levels on the air.
TXFlow ON | OFF Default: OFF
Mode: packet Host: TF
OFF
Software flow control for the DSP is disabled in Transparent mode.
ON Software flow control for the DSP is enabled in Transparent mode.
With
TXFLOW ON , the setting of XFLOW determines the type of flow control used in the Transparent mode by
the DSP to control transmitted data; with it
OFF
, the DSP uses only hardware flow control to control transmitted
data. All data that’s sent to the terminal remains fully transparent.
With both
TXFLOW
and
XFLOW ON
, the DSP uses the Start and Stop characters (set by
XON
and
XOFF
) to
control the input from the computer.
UCmd n x Default: 0
Host: UB
n 0 to 15 specifying a User BYTE that may be set.
x
0 to 255 specifying the value of the specific byte to be set.
The UCMD is an extension of the UBIT command which allows up to 15 commands that take numeric arguments to
be added to the DSP-232 without burdening users with a large number of commands. The functions controlled by
UCMD are things that most users will never have to change. Still they are important enough to some users or
applications programs that we have included them under the umbrella command UCMD.
The following are examples of how to use the UCMD command:
UCMD 2
Returns the present status of UCMD 2.
UCMD 4 5 Sets user command 4 to the value of 5.
UCMD 12 OFF Sets user command 12 to the value of 0.
UCMD ON
Restores user command 8 to its default value.
UCMD Shows the setting of the last UCMD entered.
Listed below are the UCMD functions and the default states that presently have been assigned. The default state of
each UCMD is always shown first.
UCMD 0:
This is a Pactor command. It sets the number of correct packets in a row that must be received
before generating an automatic request to change from 200 to 100 baud.
UCMD 1: This is a Pactor command. It sets the number of incorrect packets in a row that must be received
before generating an automatic request to change from 200 to 100 baud.
UCMD 2: This is a Pactor command. It sets the number of packets sent in a speed-up attempt.
UCMD 3: This is a Pactor command. It sets the maximum number of Memory ARQ packets that are
combined to form one good packet. When this number is exceeded, all stored packets are cleared
and Memory ARQ is re-initialized.
UCMD 4-15: are unused for now.
UBit
n
ON
|
OFF
Default: 0
Mode: All Host: UB
“n” 0 to 255 specifying a User BIT that may be set ON or OFF .
September, 05 4-25