Signex CPT96 User manual

See Fig. #

for D-sub pin

connections

Rear D-sub

connector

(part)

Chassis
ground point
(Ch. 48 only)

Rear solder

points

T

R

S

G

Parallel

points

T

R

S

Jumper

cable

Program

pads

T2
T1

R2
R1

S

Top PCB

Front

Jacks

Front
panel

TEMPORARY
USER GUIDE

Rear D-sub

connector

(part)

Chassis
ground point
(Ch. 48 only)

T

T

Bottom PCB

Please accept our apologies for the absence of a

finished User Guide - this is currently being written.

R

R

In the meantime, this temporary guide should give

you most of the information you need. In the event

S

G

S

of any problems, please contact Signex:

Tel: [phone]
Fax: [phone]

Circuit diagram of one Isopatch Bantam channel

13

25

12

24

11

23

10

22

9

21

8

20

7

19

6

18

5

17

4

16

3

15

2

14

1

S
R
T
S
R
T
S
R
T
S
R
T
S
R
T
S
R
T
S
R
T
S
R
T

1

2

3

4

5

6

7

8

Channel Number

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

E-mail: [e-mail]

ISOPATCH
BANTAM

CPT96

Isopatch Bantam D-sub pin connectionsrear

PRO AUDIO PRODUCT S

Half or full normalising

The offers a choice of half or full normalising on every channel. When half

Isopatch Bantam
normalised (sometimes called Sniff and Break), the link between the sockets is broken only when a
plug is inserted into the bottom socket (half of the pair of sockets). The top socket can be plugged into
without breaking the link to the socket below, allowing the signal to be manually patched into another
input whilst still connected to its ‘normal’destination. This configuration is particularly useful because it
allows an output to be split and sent totwo inputs simultaneously. In this situation, the ‘normal’ link can
still be broken by simply inserting an unconnected jack plug or patch cord into the bottom socket.
When a pair is fully normalised, the link between the sockets is broken when a plug is inserted into
either the top orbottomsocket. This option should be used when an output must not be routed tomore
than one input at a time.

Full normalHalf normal

R1

T1

R1

S

S

T1

Half normal

Full normal

Programming normalising

The Isopatch Bantam is supplied with all sockets isolated
(not normalised) but any channel may be easily normalised
by soldering across special ‘program pads’ on the top printed circuit board (PCB). There are five
program pads on each channel and they act like switches - soldering across a program pad is like
closing a switch. When soldering a program pad, more solder is needed than for a normal joint
because the solder has to 'bridge' the gap in the pad. When bridged, the joint on the program pad will
look like a bead of solder. Take care not to get solder anywhere else on the PCB as this could cause a
short circuit and possibly damage the equipment connected to the Isopatch Bantam. If you have no
experience soldering, then ask your dealer to do this for you. To program normalising on any channel,

T2

R2

Normalising a channel on the Isopatch Bantam

Signal Type

Mono (Unbalanced)

Mono (Balanced)

Stereo (Unbalanced) *

Digital (SPDIF)

Digital (AES/EBU)

Wiring of different signal types to a Bantam Jack

T2, R2 & S

Tip

Signal

+ (Hot)

Right

Signal

+ (Hot)

Ring

- (Cold)

Left

- (Cold)

Sleeve

Ground

Ground

Ground

Ground

Ground

T1, R1 & S

T2

R2

Bantam

Jack

Left and right channels may be

*

reversed.

Note: Screen is always ground