splitting into two separate ‘!’ segments, but remember that there is a small delay before
each segment is executed. To generate repeating patterns put a ‘<’ character after the last
parameter (section 4.17). To stop a ‘!’ segment when it is running, hold the
key
until the display indicates that the sequence has stopped (typically up to 7 seconds).
The LA101 sequence editor describes the parameter of the ! tone segment at the cursor, to
simplify entering and editing complicated tone definitions (eg
TONE 7 DURATION/ms).
If a very long series of tones is required it is possible that the sequence definition will
exceed the 250 characters allowed by the LA101. In this case the sequence should be
split into two or more sequences with the main sequence using the > segment to call sub-
sequences as required (see section 4.23). This can also simplify any series of tones where
a particular set of tones is repeated several times within the series.
It is possible to output an FSK header before the tones by simply placing a letter after the
‘!’ character. Note that segments D, E, F, G, I, K, T, V, W, Y and Z can all be defined in
this way using the ‘!’ segment and this allows different levels or frequencies to be used,
but remember that the LA102 will assume it has a standard Lindos segment so you will
need to interpret the results intelligently. See section 4.27 for details of segment
frequencies, levels and timings and equivalent ‘!’ segment definitions.
Examples:
1. 1kHz at +12, +8, +4, 0, -4, -8 and -12dB for 2 seconds each, defined as a single
segment:
!1000,2000,12,,,8,,,4,,,0,,,-4,,,-8,,,-12
Note that the frequency and level are only specified for the first tone, and are left blank
for subsequent tones. They will always default to their previous values, and therefore
only need to be specified once in this example. The same results could be achieved using
the much longer definition:
!1000,2000,12,1000,2000,8,1000,2000,4,1000,2000,0,
1000,2000,-4,1000,2000,-8,1000,2000,-12
Alternatively, each tone can be defined in its own segment giving 7 segments in total.
This allows each segment to be run individually (see section 3.21):
!1000,2000,12 !1000,2000,8 !1000,2000,4 !1000,2000,0
!1000,2000,-4 !1000,2000,-8 !1000,2000,-12
2. To generate a 10ms 5kHz tone burst at +8dB followed by 5s silence:
!5000,10,8,0,5000
Note that the frequency of 0 in the second ‘tone’ will select the DC0 state on the LA101.
No level is specified for the second tone to avoid any transients caused by relay
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4. User Defined Sequences
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