Speeding up the existing Mark III Data Buffer

Ari Mujunen, amn@nfra.nl

v1.2, 26 June 1995

Trying to find a straightforward way of speeding up downloading data from a Mark III data buffer is a part of the EVN Mark IV Upgrade project. Various options to speed up the downloads are discussed together with suggestions of initial steps to be taken to verify if the ``serial speedup'' option can be realized. Section steps describes what we could do to verify the ``serial speedup'' option and the sections bkg1st -- bkglast provide background information and present other possible ways of speedup.

1. This is WSRT VLBI Memo #033

2. Reasons for speeding up downloads

3. Speeding up the serial RS232 interface

4. Replacing the S1883 UART chip to provide a parallel interface

5. Replacing the whole data buffer, perhaps even the decoder

6. Suggested steps to be taken