Lindos LA100 - Repeating Segments and Sequences (<); Multiple Results Compartments

This segment will produce a stepped graph but the levels will be correct at the listed
frequencies on the printout. Note that the levels could be specified for the tones providing
weighted sweeps. A simpler segment, using less frequencies is more manageable but
remember that the printed levels will only be correct at the specified frequencies (30, 100,
500, 1k, 6.3k, 10k, 15k, 20kHz):
!U30,1268.7,,100,1040.6,,500,112.5,,1000,1532.8,,6300,281.2,,
10000,281.2,,15000,322.8,,20000,160,,
4.17 Repeating Segments and Sequences (<) repeating segment
Segments can be made to repeat indefinitely by placing a < character after the segment
(and its parameters). Normally this feature is used with frequency sweeps where the
LA102 will continuously update the frequency response display as adjustments are made.
The default sequences 15 and 20 are set up to provide repeating frequency sweeps at
different speeds.
Whole sequences can be made to repeat by placing a << at the end of the sequence. This
would normally be used for testing a communication link where the oscillator can be left
at one end continuously generating the sequence. The measuring set can be connected at
the receiving end and will automatically receive the next complete sequence and display
the results. Alternatively, a test tape could be made containing several copies of the
sequence, allowing the user to ‘break-in’ anywhere on the tape (see section 3.26).
‘!’ segments can also be made to repeat by following the whole segment with a ‘<’
symbol. For example, to repeat a 100ms 1kHz tone burst every second:
!1000,100,0,0,900 <
Accurate timing is maintained during repeating ‘!’ segments. Unlike a normal ‘!’
segment DC0 output will not be selected after the last tone unless it is specifically
requested by using a frequency of 0 as in the above example. This allows two tones to
alternate smoothly. For example, to alternate between 3125Hz and 3188.7Hz at 2Hz:
!3125,500,3188.7 <
Any segment can be made to repeat by following the segment letter (O,P,Q,R,S,U or X)
with a ‘<’ symbol although only sweep segment results are displayed by current LA102
software. The fast sweep segment (X) is especially useful with repeating sweeps as it
gives a very quick update of the frequency response allowing equipment to be adjusted
easily.
4.18 Multiple Results Compartments results compartments multiple results compartments
Normally the LA102 will only expect a single sweep segment, and a single distortion
segment, etc., in each sequence. This can be overcome by re-configuring the way the
LA102 uses its results memory.
memory number
81
4. User Defined Sequences