User’s Manual Innomar SES Parametric Sub-bottom Profilers 79
Innomar Technologie GmbH (2020-09) 79
number of pings: 2 number of pings: 3
Due to the transmitted bursts of sound pings it may happen that the SESWIN echo screen scrolls
not continuously any longer, especially when using a small number of pings at large trigger inter-
vals.
The INNOMAR SBP will transmit a full burst as defined in the synchronisation window at all condi-
tions. If the number of pings per burst does not fit into the trigger interval, the next trigger event
will be discarded. This may cause a sudden drop in the effective ping rate, even if the external
ping rate changes slightly only!
If external trigger events are discarded due to high delay values or too many pings required per
burst, the trigger information “EXT” in the SESWIN status bar starts to flash yellow.
The next figure illustrates what happens, if there are too many pings set to fit in one external
trigger cycle.
The two pings fit into the external trigger
cycle.
Now the time between two external trig-
ger events is too short, to transmit two
pings in between. Therefore, every sec-
ond external trigger event is discarded.
How to calculate the maximum number of
pings is described in the next subsection.
5.2.4 External Trigger with Delay and Ping Rate Increase
“Sync IN”
“Sync OUT”
“Sync IN”
“Sync OUT”
“Sync OUT”
“Sync IN”
“Sync IN”
“Sync OUT”
To Next Page
Loading...