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powermate x5 astrophoto
Dear NandoPG,
Hi,
I am interested in astronomy and begin to research in the field (instruments like telescope and ccd camera etc..).
the main problem for me is astronomy site finding. at the othe hand, which criteria are good for astronomy site,
can you introduce me...
thank you , researchers,
Gain needed= 40 dB, and i tested the op amps. thy are 4 opamp in an IC with high frequency working specs(GBW>1MHz).
the final question :
Can you introduce me a device (like MAN-1LN minicircuit LNA) but for my favorite frequency band (20-100 kHz)??
thanks again.
i used op amp based diff amp.
input is a simple 20 khz (0.5 V p-p) sin wave,
but output signal is noisy random shaped signa.
i think there are low noise amplifiers for low lewel signal amplifications. the lna is placed after antenna.(we use them for MHz frequencies. the minicircuits and miteq...
I use a good differential amplifier for the signal amplifiyng but output signal damaged. if level lowers, the signal disapeared.
which amplifiers are good for the task?
if i use LNA?
thanks
we need to detect a signal in the band that is not a sound signal.
we work with spectrum analyzer then we need 50 ohm connections to instrumentation and measurements.
I need a circuit for an amplifier with the following specifications:
1- frequency band : 25 kHz-125 kHz
2- Gain: 10 dB (not important) but flat response in the band.
3- mathing: input=50 ohm , output= 50 ohm (for coaxial cable connection to antenna and ...)
i tried with OP07 (operational...
I think this is the following book :
Digital Communication Receivers: Synchronization, Channel Estimation, and Signal Processing (Hardcover)
by Heinrich Meyr (Author), Marc Moeneclaey (Author), Stefan A. Fechtel (Author)
Hardcover: 864 pages
Publisher: Wiley-Interscience (October 20, 1997)...
the following sites are good.
www.uwec.edu/surepam/media/SUREPAM_Matlab1.ppt
www.glpbooks.com/download_files/IntroTechMATLAB.ppt
scv.bu.edu/documentation/tutorials/MATLAB
www.maths.uq.edu.au/~gac/mlb/mlb.html
see also :
Thank you,
but the problem is practical and i need filter components (like Kr Filters Co. products).
which components did you know for that?
if it is a tunable filter bank?
thanks.
passive loww pass filter
how can i design (or buy) band pass filters with :
F0 (kHz) : 37.879
53.674
48.363
68.677
63.981
79.976
91.146
75.000
106.250
90.000
112.500
bandwidths =1 khz approximately. so that not overlap other bandin neighbor .
Q is ery important(> 100).
Filter bank is better...
I found the answer,
it is showed that the Gage aplied 8 bit-2GHz , sampling rate and 2 Gbite on board ram is the best choice for us,
another options not very important and
low dynamic range couldbe compensated later.
thanks
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