Lindos LA100 - LA101 Frequency Sweeps & Tone Burst Commands

frequency and ensure that it is displayed rounded, precede the frequency with a minus
sign (‘-’). Omitting any value leaves the previous value set. Example:
1FP-100,-315,-1000,-6300,-10000.
Level Presets: 1LPv1,v2,v3,v4,v5
LP set level presets
Set level presets 1 to 5 to the specified levels, v1 to v5.. Omitting any value leaves the
previous value set. Example: 1LP-80,-60,-40,-20,0
9.11 LA101 Frequency Sweeps & Tone Burst Commands
Frequency sweeps and tone bursts and normally generated by defining a suitable sequence
(using the 1DS command) and then running it (with the SQ command). The frequency
sweep commands have the advantage that the precise start and stop frequencies can be
specified, but they do not generate FSK so the LA102 will not respond automatically.
Frequency Sweep: 1SWf1,f2,d SW run frequency sweep
Perform frequency sweep, without FSK header. f1 and f2 are the start and finish
frequency codes (not actual frequencies), and d is the duration of each frequency in ms
(0.1-6553.5). Note that the LA101 uses 32 frequencies per octave, so a 3 octave sweep
lasting 20s will use a duration of 208.3ms per tone. f1 and f2 may be calculated as for the
F:n command or taken from appendix F. Descending sweeps are not allowed, so f2 must
be greater than f1. Weightings will not be applied, even if selected. This command is
really for use with other measuring equipment, as it is generally simpler to use a test
sequence for making frequency response measurements on the LA102. However, the
LA102 can receive frequency sweeps which do not have an FSK header using its
frequency sweep mode (see section 6.2 and section 9.22).
Third Octave Frequency Sweep: 1TSt1,t2,d
TS run third octave sweep
Perform third octave frequency sweep, without FSK header. t1 is the starting third octave
code, t2 is the finishing third octave code and d is the duration of each frequency in ms
(0.1-6553). Note that t1 is the first frequency to be output, but t2 will not itself be output
as t2-1 will be the last frequency. Also t2 must be larger than t1. See appendix F for
third octave frequency codes. If selected, weightings will be added to each level to give a
weighted frequency sweep, and this is the main reason for using this command over the
SW command described above. Like the SW command, this feature is really for use with
other measuring equipment.
Tone Burst: 1TBf,d
TB Tone burst
Generate a tone burst at frequency f Hz lasting d ms (0.1-6553.5ms) with amplitude
determined by the last LVn command. Note that his command should normally be
preceded by a WF2 command to silence the output by setting the DC0 condition before
the tone burst, and this condition will be restored after the tone burst. Tone bursts always
begin at a zero-crossing for minimal sidebands. Tone bursts can also be defined as
sequences (see section 4.15) and this allows multiple tone bursts/tone sets to be run.
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9. Remote Control