SCS PTC-IIIusb, User Manual

Page: 80 / 217

6 Commands
67
6.53 MAil
Default setting: 0
Parameter: 0 New messages not reported.
1 New messages reported on connect.
On connect, reports if new messages for the caller are at hand. Only messages that have
not been already read by the caller are counted.
To report mail for the sysop that has not been read (filename = MYCALL), the
CON -
LED is used. It blinks during STBY operation if a new, unread mail is available.
6.54 MARk
Default setting: 1400
Parameter: X 300... 2700, frequency in Hz.
Allows the adjustment of the mark frequency of the PTC-IIIusb in 1 Hertz steps (internal
resolution 0.25 Hz, using DDS). The frequency chosen with the
MARk
command is only
used when the
TOnes
parameter is set to 2 (refer to
TOnes
command, chapter 6.94 , page
87 ).
6.55 MAXDown
Default setting: 6
Parameter: X 2... 30, number of error packets before down-speed.
Selects the down-speed parameter for automatic speed adaption.
MAXDown
determines
how soon the system steps down to a lower speed but more robust mode during poor
channel conditions (2=fast / 30=slow). Example:
MAXDown
7, i.e. the PTC switches
down after receiving 7 error packets in a row.
6.56 MAXError
Default setting: 70
Parameter: X 30... 255, maximum number of retries or errors.
MAXErr
defines the timeout value. When initially calling a station, this value sets the
maximum number of sync packets that the PTC sends without a response from the other
station (refer to
Connect
command, chapter 6.22 , page 53 ).
When connected,
MAXErr
determines how many consecutive faulty blocks or controls
are permitted before the connection is aborted
***TIMEOUT: DISCONNECTED
.
Request blocks or request controls are not interpreted as errors, and reset the error counter
to zero.