
7 – Operating Procedure
DPN 402197 © TSS (International) Ltd Page 15 of 30
The descriptions below include the individual data formats and the RS232 parameters
for each type of altimeter that you may use with the 350 System. Except for the OSEL
altimeter, transmission starts immediately after power-on.
Note that DeepView removes all spaces present in the altimeter string before inter-
pretation. This is because the UK90 format sometimes includes extra spaces which
are not defined in its specification. This removal of spaces applies to all types of altim-
eters which are connected directly to the SDC.
7.3.3.1 Datasonics PSA 900 and PSA 9000
The transmission formats for the TSS altimeter, and the Datasonics PSA 900 and
PSA 9000 are identical. They transmit data at 2400 baud using 7 data bits, 1 start bit,
1 mark bit and 1 stop bit.
Table 7–8: Altimeter output format – TSS and Datasonics
If the Datasonics PSA 900 includes the optional pressure transducer, the data string
becomes:
Table 7–9: Altimeter output format – Datasonics with pressure transducer
7.3.3.2 Ulvertech Bathymetric System
The Ulvertech Bathymetric system transmits data at 9600 baud using 8 data bits, 1
stop bit and no parity.
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