Thursday, March 18, 2004

Snell & Wilcox Golden DaVE
I've been working at a facility that has a studio and does travel and holiday shows. The vision mixer died and we got another comms board for the control out of Snell - however, while diagnosing the problem I had to Hyperterminal into the beast to discover what IP address it thought it had (control panel talks over ethernet) and the RS232 port of the back of the panel is a male which (according to the IEE RS232C standard) defines it as a DTE (lit. Data Terminal Equipment) - so, to connect to a PC you need a female-female cable that is null modem (i.e. Tx and Rx cross over) - but no - it is a DCE (Data Communicaing Equipment) and doesn't need a cross-cable. The guy at Snell & Wilcox seemed unrepentent that they'd got it wrong - I dunno - why bother to mention the standard and then not conform to it?
Also - the mixer chasis has two ethernet ports - one for the panel and one for the LAN - if the tub doesn't see a panel on one port it goes looking on the other, taking the IP address that the tub knows about to the LAN port - talk about making life difficult!
As the studio director said - "You don't get this trouble with a Sony".

No comments: