NCCS - Latest Update (30/10/96) !
The most recent developments in the NCCS project are :
- STEER hardware cage -
- The initial run of cards need some finishing off work but should be
ready for QA by next week.
- SDIO hardware -
- Both the SDIO remote module and the RS232 <-->
RS422 signal converter have been tested and are working.
Some minor tests to do with strobes and daughter boards still need to be
- Five more SDIO remote modules are in an advanced stage of
manufacture. The manufacture of the signal converter is being delayed
by the unavailabilty of 10 pin RJ45 sockets.
- Optic Fibre Cabling -
- G.Nicolson reported on his analysis of the signals
that the optic fibre cables would need to carry. The signals can be
divided into two groups:
- non-time-critical control signals such as relay control
lines etc. Such signals should only require relatively slow
non-synchronous switching and or sensing, ie. be within the capabilities
of an ordinary SCADA system such as the SDIO.
- fast "instantaneous" signals such as the noise diode
switching signals ( on 8 systems, 2 per system) and the Dicke switch
signals ( on 4 systems ). Present switching rates and the use of analog
synchronous detectors require that the instantaneous jitter on these
signals be less that 2 microseconds. This group basically includes all
signals that do not fit into the first group above. The possible
inclusion of the serialised encoder signals should be investigated.
- It was pointed out that a document detailing all the signals involved
and the requirements pertinent to each, needs to be produced before any
firm decisions are taken. Such a document will be written within the week.
- This will then enable a preliminary cost analysis of a suitable
system to be produced.
- Noise Diode Controller (NDC) Hardware -
- Some ideas for a multiplexor capable of handling the fast switching
signals mentioned above have been tested.
- Design work is awaiting the arrival of the PIC microprocessor
- Station Clock Module -
- The Truetime Clock module has been installed in the timing room
(apart from DC backup power connections) and is undergoing tests. The
NASA time code output has been connected to the control room display.
- The frequency distribution amplifier will also need to connected
to some form of DC backup power.
- Other software -
- There has been considerable progress on the initial port of
LINES. The program is now capable of multiple gaussian fits and
simple Fourier transforms. Beta testing is to commence soon.
- Phase 1 Timeline -
- A new version of the timeline was presented detailing the present and
projected status of the Phase 1 NCCS hardware. Details of software are
to follow on the report on J.Quick's trip to ESRF.
NCCS - Progress Meeting
The next NCCS progress meeting will be held on
13 November 1996 at 11:15 AM in
the usual place.
HartRAO NCCS Updates Page / HartRAO /
Last updated 4 November 1996