Logic Out (Record Tally); Cl-1 Keyboard And Remote Control Interface; Connecting The; Cl-1 Keyboard Interface - Sound Devices 788T-SSD User Manual And Technical Information

Connect pin-9 of the rear panel DE-15 connector to the required logic output of an external remote
control or mixer. See Connector Pin Assignments.
appears on pin-9. High and Low are defi ned as follows:
• Low Input = 0.8 V or lower
• High Input = 2.0 V or higher

Logic Out (Record Tally)

The 788T provides a record tally output via the Logic Output pin on the rear panel DE-15 connector.
See Connector Pin Assignments.
for providing a record tally signal back to an external mixer or for driving an external Record LED or
relay directly via a suitable resistor. The Logic output is able to source or sink up to 500 mA.
The logic output pin can be set to go high or low when record is initiated on the 788T. This setting is
maintained in the Setup Menu option LOGIC OUT: ASSIGN.
Logic Out Assign Setting
Undefined
High Upon Record
Low Upon Record

CL-1 Keyboard and Remote Control Interface

The CL-1 Keyboard and Remote Control Interface is an available hardware accessory to interface
with PS/2 compliant computer keyboards and enable external devices to control the 788T. When us-
ing the CL-1, front panel controls and menu selections on the 788T can be mapped to keyboard short-
cuts, allowing for full keyboard control of the recorder. Additionally the CL-1 has contact closures for
programming remote inputs or outputs. These are commonly used for machine control and "remote
rolling" using a mixing console with transport controls.
Connecting the CL-1
1. Connect the included C. Link cable to the 788T's C. Link Input connector.
2. Connect the opposite end of the C. Link cable to the CL-1's C. Link connector.
3. Connect a PS/2 keyboard to the PS/2 connector on the CL-1.
4. Connect switches between assigned pins 1-6, pin-7 (ground), and pin-8 (+5V) on the CL-1. (
Logic Inputs and Outputs
The C. Link port on the 788T provides power for CL-1 operation.

CL-1 Keyboard Interface

The CL-1 allows a user to use a PS/2 compliant keyboard to control the 788T. All functionality and
setup of the Keyboard Assignments are identical to that of the USB Keyboard.
ments for more details.
Sound Devices recommends using either a PS/2 keyboard via the CL-1 or a USB Keyboard directly into
the 788T Keyboard Input, but avoid using both keyboards simultaneously.
788T/788T-SSD User Guide and Technical Information
The 788T function is triggered when a low voltage
This can be used to initiate an external recording or logging device,
Logic Output Voltage in Record Mode
(DC potential at Pin-8 of DB 15 connector referenced to Chassis Ground)
Indeterminate
4.5 – 5.5 Volts
< 0.5 Volts
)
See CL-1
See Keyboard Assign-
89