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Re: Improved Spectra-Strip Cable -- TPO insulation
Hi Gerard,
I agree with you that we need to get an attenuation curve for the cable we
intend to use. I have dusted off an old program that can propagate pulses
through different cables, but it requires the attenuation spectra as
input. As an example I have run the program to propagate a Gaussian pulse
shape through standard twisted pair ribbon cable (9V28) for two different
lengths of cable (figures attached). I would expect increased dispersion
in the new cable due to smaller dimensions. The program is available if
anyone would like to use it.
Cheers, Elton.
Elton Smith
Jefferson Lab MS 12H5
12000 Jefferson Ave
Suite # 16
Newport News, VA 23606
elton@jlab.org
(757) 269-7625
(757) 269-6331 fax
pulses
slewing
WAVE_PROP Version III, Today is Dummy Date
Top Drawer Plot Title=GAUSS, mean=30 ns, sigma=10 ns
Period of Fourier Integral Transform = 200.
Limits of pulse Integration and plotting= 0. to 50.
Wave Form: Specification=GAUSS
Description: Gaussian with mean= 30.ns and sigma= 10. ns
Computed Input Pulse parameters:
Rise time (10-90%) = 16.87743
Fall time (10-90%) = 16.8767281
Full Width at Half Maximum = 23.5610981
Peak Value = -0.499755919
Pulse sum = -11.8968077
Cable Type =9V28 of length= 10. m
.050 Vari-Twist Flat Cable (28 gauge), Belden catalog p. 183
Computed Output Pulse parameters:
Rise time (10-90%) = 17.8414078
Fall time (10-90%) = 22.3753738
Full Width at Half Maximum = 25.3227711
Peak Value = -0.408807755
Pulse sum = -9.96175289
Parameters for Systematic Study:
Disc Threshold (V)= -0.100000001
Relative pulse height variation: 0.5 to 1.5 of output
Plot Limits of time over threshold : 0. to 50.
WAVE_PROP Version III, Today is Dummy Date
Top Drawer Plot Title=GAUSS, mean=30 ns, sigma=10 ns
Period of Fourier Integral Transform = 200.
Limits of pulse Integration and plotting= 0. to 50.
Wave Form: Specification=GAUSS
Description: Gaussian with mean= 30.ns and sigma= 10. ns
Computed Input Pulse parameters:
Rise time (10-90%) = 16.87743
Fall time (10-90%) = 16.8767281
Full Width at Half Maximum = 23.5610981
Peak Value = -0.499755919
Pulse sum = -11.8968077
Cable Type =9V28 of length= 20. m
.050 Vari-Twist Flat Cable (28 gauge), Belden catalog p. 183
Computed Output Pulse parameters:
Rise time (10-90%) = 19.1020107
Fall time (10-90%) = 34.2358589
Full Width at Half Maximum = 27.4836102
Peak Value = -0.336869925
Pulse sum = -8.26691246
Parameters for Systematic Study:
Disc Threshold (V)= -0.100000001
Relative pulse height variation: 0.5 to 1.5 of output
Plot Limits of time over threshold : 0. to 50.