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tek_1.02 - 3/09/2008

Added the tek_afg utility (mostly written by Matt Clark). Allows you to set a
few of the waveform parameters from the command line, such as turning channels
on and off, changing the peak-peak voltage, frequency or phase. Also allows
you to send an arbitrary command to the Tek AFG (or in fact to any VXI11
instrument).

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tek_1.01 - 01/06/2007

Quite a major revision, brought on by finally getting hold of an MSO4000.

tek_user:
Channels are no longer just char's, otherwise how would you specify digital 
channels? Backwards char compatibility is provided by a few wrapper functions
and an improved version of tek_scope_channel_str().

Added ability to set record length.

Found out that on the 4000 series scopes, there's a new query
"HOR:MAIN:SAMPLERATE?" which doesn't seem to suffer from the bloody annoying
time lag of XINCR being updated on the 3000 series. Hence a
tek_scope_is_TDS3000() fn to find out what the scope is, and different ways
of getting the actual number of points, depending on scope model.

tgetwf: added ability to set number of points (actually the horizontal
record length).

tek_load_setup: increased buffer size from 10000 to 25000 to cope with all
the extra settings required for MSO4000 scopes.

tek_save_setup: ditto

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tek_1.00 - 17/05/2007

Initial release. Probably buggy. Only tested (briefly) on TDS3054B scope and
AFG3252 arbitrary function generator.

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