Campbell Scientific VSP3 Vosponder Voice Radio Interface - Manual (Page 52)

Appendix E. The Anatomy of the Voice Image File
E-2
The “Postscript” field follows. This is what is to be spoken after the data
point is verbalized. Remember the characters, ~ | {} are not allowed in
any text string.
| Another “End of Text” marker is required next. When the Vosponder
encounters this marker, it checks to see if any further data points must be
reported. If there are, it continues to retrieve information from the voice
image and verbalize it. If not, it wraps up the verbalization and shuts
down the radio transmitter.
In the example two additional data points are verbalized, one for
temperature and one for minutes into the day. Their record identifier’s are
02 and 03 respectively.
~ “End of Image” string marker. This is used to tell the Vosponder that the
voice image is complete.
The voice image should be saved as a text (.txt) file.