Service manual

Machine Control Card (SUN820B147)

CARD DESCRIPTION

The MCS card is a transputer based machine controller and synchroniser. The MCS card

accepts a variety of reference sources from which frame and field rate clocks are derived

under control of a T4 transputer. The references may be filtered by an ADSP 2105 processor

or passed directly to a T2 transputer which handles the low level serial communications with

the tape machines. 6 serial ports are available for machine control which can support a

number of protocols and machines in user defined master and slave groups. The card can

also generate references and drive TimeLine 1 or 2 at a rate independent of the current

reference source.

LED INTERPRETATION

D17, D16, D15,

D14, D13 & D12 (yellow) ON indicates T4 under software

control.

D11, D10, D9,

D8, D7 & D6 (yellow) ON indicates T2 under software

control.

D5 (red) ON indicates T2 error.

D4 (red) ON indicates T4 error.

D3 (green) ON indicates T2 Link 0 activity.

D2 (green) ON indicates T4 Link 0 activity.

D1 (red) ON indicates T4 reset.

Digital Service Manual

Issue 3 Page 23

D10

D11

D12

D13

D14

D15

D16

D17

SUN820-147