9.14 Running a Sequence Running a sequence from remote mode Automatically running a sequence
As for keyboard operation, sequences provide a quick and convenient way of performing
a lot of complex measurements, and this can greatly simplify remote programming, as
well as providing all of the usual benefits of using sequence mode (see chapters 3 and 4
for details). To avoid changing any of the 10 user sequences (numbered 1-10), an extra
sequence (number 0) is provided for remote mode use only and it is recommended that
remote software should always use sequence number 0 when defining a special sequence.
Even when using a standard sequence, it is good practice to define it as sequence 0 in case
the one in the unit has been changed.
Run and Receive Sequence: SQn,m,c,r
SQ run sequence
This command instructs the LA101 to send a sequence, and the LA102 to receive one.
The parameters are sequence number (n), segment number (m), channel number (c) and
register (r), but they are all optional, and this command will normally be used with no
parameters, to run sequence 0 on both channels (for example: SQ).
The sequence runs relative to Test Level if one is set (see TLn above), and the source ID
segment is added automatically where necessary (see chapter 3 and section 4.3). The
LA101 ignores further commands until the sequence is complete, and the LA102
handshake holds back further commands during this time.
The sequence number n should be in the range 0-10, but future LA100 software may
provide more sequences. The segment number m specifies which segment to run (with
segment 1 being the first − see section 3.21), but it is usually omitted in which case the
entire sequence runs. The channel number c should be 1, 2 or 3 for left, right or both
channels respectively, and it will default to 3 if omitted (see section 3.11). The final
parameter, r, specifies the register number, 1 or 2, to hold the incoming sequence, and
would normally only be used when two mono sequences are to be received independently
and the results shown side by side (see section 3.12).
Some examples:
SQ Run sequence 0 on both channels
SQ1 Run sequence 1 on both channels
SQ1,1 Run segment T (sequence 1, segment 1) on both channels
SQ2,,1 Run sequence 2 on the left channel only
SQ,,1,2 Run sequence 0 on the left channel and store results in register 2
Any sequence can be run using this command, but it is important to note that the LA102
will not respond to a sequence which does not contain FSK (sequence 19, the PPM test
for example). If running such as a sequence the command should be sent to the LA101
only (1SQ19,,1 to run sequence 9 on the L channel without making the LA102 wait for a
sequence). Similarly, repeating sequences will never finish (until a key is pressed on the
LA100) so they are best avoided. It makes more sense to run a sequence, read the results
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9. Remote Control
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