SCS PTC-IIex, Manual

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8 FAX
8.3.2 Reference of databytes concerning the PTC
Value Reference
0-240 Normal, linear frequency transmission data 0 = 1500 Hz
24 = 2300 Hz
241 Sync tone 1100 Hz
242 Sync tone 1200 Hz
243 Sync tone 1300 Hz
The values 0-243 trigger the PTT and the transmission mode of the JVComm modem.
As soon as one of these bytes is received, the PTC usually switches to transmit and
keeps this condition for (2500 * 1/data rate) seconds (re-triggerable). At a modem baud
rate of 57600 baud the TX tail has a length of 0,868 seconds.
244-252 Reserved for future extensions (no functionality, bytes are ignored)
253 Deletes the transmission data buffer and shortens the TX tail to 0.
(Direct analysis, not via data buffer). This command can be used to
terminate a picture.
254 Deletes the transmission data buffer and shortens the TX tail to 0.
(Analysis via data buffer). This byte defines the regular end of a
picture. It must be added to each picture to deactivate the
transceiver directly after picture end.
255 Ends the JVComm modem. Jump to the STBY mode of the PTC
(Direct analysis, not via data buffer).
8.3.3 LED functions
Receiving mode
The LED behavior is the same as in the Fmfax modem.
Transmission mode
•
Send LED active.
•
Traffic LED active in the XOFF state.
•
LED´s of the tuning indicator. Data byte 0=left-corner, data byte 240= right-corner.
Important Note:
The JVComm transmission routine of the PTC-IIex is supported from the JVComm32
version newer than 0.96c beta by JVComm32.
It is possible to download JVComm32 in the internet from the JVComm-WWW-Site
http://www.jvcomm.de
2
.
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Be aware of that Internet addresses may change frequently
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