Help: ICE_CARDS_D2E
Digital to Differential ECL Converter Module
This module converts TTL signals to F100K Differential ECL. Signal lines are
attached to the module by a 40 pin ribbon cable. It is best to remove the
module from the card before connecting or disconnecting the 40-pin ribbon
cable as this usually puts torque on the 24-pin module connector.
SERIES 2 CARDS:
An external clock can be connected via SMB connector on the card edge and
is jumpered to be DC coupled TTL levels or an AC coupled 1Vpp sine wave.
The clock also has a jumper that applies a 50 ohm termination to ground.
An internal clock is also available via software control.
It is the on-board crystal 40MHz divided by an integer from 1 to 65535.
H3 - Closed for 50 ohm termination
H4 - Closed for DC coupled clock input (0-5V)
Open for AC coupled clock input (1Vpp)
In standard configurations, the 40 pin connector will be cabled through the
card edge connector to an 40 pin male IDC connector roughly 3-4 inches from
outside of the chassis.
SERIES 3 CARDS:
There are three clock sources, all located on the motherboard, and are
selectable via software control. The default clock is an external source
connected to the motherboard SMB connector, usually a 1Vpp sine wave.
The internal clock (MUXCLK=I) is the on-board 40MHz crystal divided by an
integer from 1 to 65535. The alternate clock (MUXCLK=C) is the socketed
crystal X2 on the motherboard.
See HELP CARDS MIDASDSM for information on interfacing with a Midas switch.