Calrec SUMMA, Installation Manual

Page: 15 / 96

CALREC
Putting Sound in the Picture
15
SETTING HYDRA IDs FOR FIXED FORMAT I/O
The 8-way DIP switch on the rear
of all fixed format I/O boxes is set
as an 8-bit binary representation
of the HID value with the left hand
switch used for the most significant
bit, and the right hand switch for
the least significant bit. A switch in
the down/off position represents a
binary 0 and a switch set in the up/
on position represents a binary 1.
Each switch/binary-bit equates to a
decimal value, starting at 1, for the
least significant bit. The remaining
switches are double the value of their
less significant neighbour, making the
8th/most significant bit equate to a
decimal value of 128.
All fixed format I/O box ID switches are
orientated the same way, though some
boxes, such as MADI units, use a different
style switch with more pronounced
labelling. Ignore any labels on the switch
itself and always refer to the Calrec
labelling on the surrounding panel which
will show the most significant bit switch on
the left and the binary 1 position as up.
Address2
Some I/O boxes, such as MADI units,
are fitted with 2 banks of DIP switches—
Address 1 and Address 2—to provide a
16 bit ID and therefore a greater range
of values. Please note that only ID
values between 0 and 255 are currently
supported. Any DIP switches labelled
Address 2 should all be set to the off ‘0’
position.
SETTING THE HID ON A FIXED FORMAT I/O BOX