[hpsdr] [CASMIR] System Requirements 07JUN2006 (BUMP)

[Alex]

Remember, the point of a set of system requirements is to decide WHAT we want, to do, not necessarily HOW we want to do it (i.e. tower-mounting of the high microwaves is a how. Wanting to be able to operate on the high microwaves is a what). 
If you have questions on requirements management and systems engineering, take a look at (http://www.incose.org/)

So I'm reposting these CASMIR system requirements since they might have gotten lost in all the good news. 

Think about what we would like this card to do. I have my ideas, but I'm looking for input. There is no sense building something that no one wants. I'm not stupid enough to think I have all the answers. : )

I want to get cracking on this card so that it's ready when HORTON or MERCURY are ready.

Alex, N3NP

----- Original Message ----
From: Alex <harvilchuck at yahoo.com>
To: hpsdr at hpsdr.org
Sent: Wednesday, June 7, 2006 4:55:27 PM
Subject: [hpsdr] [CASMIR] System Requirements  07JUN2006

***** High Performance Software Defined Radio Discussion List *****

To help work out the details, here is a set of initial CASMIR System Requirements.
When you comment on a requirement, please reference which one you are addressing.

REMEMBER, these are possibly physically impossible requirements listed, but we need a starting point.
Let's stary out with our collective wish list and narrow it down from there.
Copy me on all comments, I will track them and offer updated requirements.


CASMIR SYSTEM REQUIREMENTS
June 7, 2006

1.    CASMIR shall support transmitter frequency coverage from 0 MHz to 47GHz.
2.    CASMIR shall support a frequency stability of better than 1 part in 10**9 over a 24 hour average
3.    CASMIR shall support defined phase stability over a range of offsets.
3.1.    Phase stability shall be better than -120 dBc/Hz at 100 Hz offset
3.2.    Phase stability shall be better than -135 dBc/Hz at 1000 Hz offset
3.3.    Phase stability shall be better than -135 dBc/Hz at 10000 Hz offset
4.    CASMIR shall have an amplitude stability of +/- 0.5 dB
5.    CASMIR shall have defined power outputs over the defined frequency coverage
5.1.    A power level of 1 watt shall be supported from 0 MHz to 6 GHz
5.1.1.    Variable power output level shall be supported with 1-3-6-10 dB steps per decade starting at -30 dBm
5.2.    A power level of 10mW shall be supported from 10GHz to 47GHz
5.2.1.     Power output level shall be fixed from 10GHz to 47GHz
6.    CASMIR shall support a load impedance of 50 ohms
6.1.    Protection shall be provided against standing wave ratios of greater than 3:1 
7.    CASMIR shall support a signal to noise ratio of 100 dB
8.    CASMIR shall create spurs no greater than –100 dB
9.    CASMIR shall support a frequency lock-up time of 20ms
10.    CASMIR shall support adjustment of frequency while transmitting
11.    CASMIR shall support an envelope rise time of xx ms
12.    CASMIR shall support an envelope fall time of xx ms
13.    CASMIR shall support a maximum information bandwidth of 40MHz 
14.    CASMIR shall support frequency resolution of 1Hz


Alex, N3NP




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