Sound-devices 722 User Manual Page 23
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722 User Guide and Technical Information
21
C. Link – Multi-Unit Linking
The proprietary C. Link (control link) connection allows multiple 702, 702T, 722, and 744T record-
ers to be connected and clocked together. C. Link also enables connection to external keyboards and
switch contacts using the CL-1 Remote Control and Keyboard Interface.
When linked, 7-Series recorders have a master/slave relationship. The master recorder and the slave
unit will share sample accurate start and stop record times. Multiple units can be daisy-chained
together to record many tracks. The C. Link protocol links carries the following data:
• word clock
• time code information (702T and 744T only)
• RS-232 machine transport data
master
unit
slave
unit
slave
unit
To link units:
1. Connect multiple units as shown in the illustration.
2. Set all linked recorders to the same sample rate, bit depth, file format, and time code frame rate (for
702T and 744T recorders). This will ensure that all files generated are compatible.
3. Set scene and take numbers on all linked recorders to the same starting file name. There is no file name
synchronization with multiple unit linking.
When linked, record start and stop on slave units will not affect units “above” it in the linked chain.
This makes it possible for units to get out of synchronization if a unit other than the master is set to
record or stop. Using the master unit will assure that all machines begin and end recording together.
Master/Slave relationships between C.Linked recorders is established immediately after the C.Link
Out to C.Link In connection is made. To reverse the Master/Slave relationship, power down all
recorders, establish the new Master/Slave relationships by reconnecting the C.Link Out to C.Link In
connectors in the desired sequence, then power on all units in order of their Master/Slave relation-
ships
The master recorder in a C.Link connection can not receive wordclock sync from anywhere else. It must
be the master wordclock source for all C.Link slaves.
The C. Link jack is a proprietary RS-232 port. Under no circumstances should analog or digital telephone
lines be connected to either jack. Serious damage could result.
- firmware rev. 2.67 1
- Table of Contents 3
- Welcome 4
- 722 Firmware Known Issues 4
- Copyright Notice and Release 4
- Quick Start Guide 5
- Routing Inputs to Tracks 6
- Recording Parameter Setup 6
- FireWire File Transfer 7
- Front Panel Descriptions 8
- Panel Lock 10
- LCD Display Descriptions 11
- -), pin-4 14
- -) and pin-3 (+) are 14
- Back Panel Descriptions 15
- Input Setup and Control 16
- -6 dBFS 17
- Input Delay 18
- Digital Input – AES3 18
- Input-to-Track Routing 19
- Selective Input Muting 20
- Sampling Rate and Bit Depth 21
- Word Clock 22
- C. Link – Multi-Unit Linking 23
- Outputs – Analog and Digital 24
- Headphone Output 25
- MS Stereo Monitoring 26
- Rotary Switch Behavior 26
- Metering and Display 27
- Meter Ballistics 28
- Peak LEDs 29
- Tone Oscillator 29
- 24-Hour Time Counter 30
- Recording 31
- Pre-Record Buffer 32
- Failure During Recording 32
- Front Panel Lockout 32
- Record Pause 32
- Playback 33
- Audio File Formats 34
- Recording Time Calculation 36
- File Naming / Numbering 37
- Scene Name/Number 38
- Take Numbers 38
- Wave Agent Beta 39
- File Management 40
- File Viewer Navigation 41
- File Viewer Screen 41
- File Time and Date 42
- File Size Maximum 42
- Setting/Clearing Flag Bits 43
- Automatic Flag Clearing 43
- File Deletion 44
- False Take Control 44
- Take Number Incrementing 45
- Take List 45
- Take Status 45
- Formatting 47
- Drive Type 47
- Drive Replacement 48
- Drive Failure 48
- When to Use CF 49
- Testing 49
- Qualified CF Cards 50
- FireWire Bus Powering 51
- Qualified Drives 51
- DVD-RAM Drives 51
- File Transfer – FireWire 52
- Powering 53
- Time of Day Battery 54
- Power-up Messages 55
- Power Consumption Variables 55
- Firmware Upgrades 56
- Connecting the CL-1 57
- Keyboard Assignments 57
- Logic Inputs and Outputs 59
- Setup Menu Presets 60
- User Setups 62
- Setup Menu 63
- • VU only 66
- • Peak only 66
- • Peak-hold only 66
- • Peak+VU 66
- • Peak-hold + VU 66
- Setup Menu Shortcuts 68
- Front Panel Button Shortcuts 69
- Connector Pin Assignments 70
- Specications 71
- Accessories 73
- CE Declaration of Conformity 75
- Software License 76
- Limitation of Liability 77
- Warranty & Service 78
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