Operation, cont’d
SIS | SW USB Function | SW USB Response to Host | |
Command | |||
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! | Performed and passed through | Chn X!] | |
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^ | Performed, not passed through | USB X!] | |
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E (any) | Performed, not passed through | See the SIS command table. | |
X | Performed, not passed through | Exe X#] | |
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N | Performed, not passed through | ||
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Q | Performed, not passed through | n.nn | |
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*Q | Performed, not passed through | n.nn.nnnn | |
I | Performed, not passed through | ChnX!•InACT X$OutACTX$] | |
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0V – 100V | Passed through, not performed* | CMD ] | |
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& | Passed through, not performed* | CMD ] | |
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% | Passed through, not performed* | CMD ] | |
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1B, 0B | Passed through, not performed* | CMD ] | |
1M, 0M | Passed through, not performed* | CMD ] | |
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1Z, 0Z | Passed through, not performed* | CMD ] | |
$ | Passed through, not performed* | CMD ] | |
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*For explanations of commands that are passed through to the A/V switcher and not performed by the SW USB, refer to your A/V switcher’s user’s manual.
Example: When a control system issues an SIS input selection command of 1! (Select input 1), 2! (Select input 2), 3! (Select input 3), or 4! (Select input 4), the SW USB switches to the corresponding input. In addition, the SW USB passes the SIS input selection command through the
The following SIS commands can not be passed through to the A/V switcher:
•Information requests: View part number (N) and Request information (I)
•Change loop mode: EnLOOP
•Upload firmware: EUpload
See the SIS Command/Response table in chapter 4, “SIS Configuration and Control,” for explanations of SIS commands that are performed by the SW USB.
Sending commands to an A/V switcher using contact closure
In Loop 0 mode, you can select an input on the SW USB by shorting the equivalent pin on the Contact port to ground (either by pressing a button on a connected contact closure device or by connecting a jumper between pin 1, 2, 3, or 4 and _[ground]). Shorting the pin to ground issues an input selection command to the SW USB, which passes the SIS command through its
For example, if you wanted to select input 1 on the A/V switcher, you would short pin 1 to ground on the
SW USB Contact port. The SW USB switches to input 1 and, simultaneously, the
The following table shows the SIS commands that are issued when inputs are selected by contact closure:
Contact closure | SIS command sent | Function on the |
selection | via | A/V Switcher |
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Pin 1 to _ | 1! | Select input 1 |
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Pin 2 to _ | 2! | Select input 2 |
Pin 3 to _ | 3! | Select input 3 |
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Pin 4 to _ | 4! | Select input 4 |
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NWhen the SW USB is operating in Loop 0 mode,
pressing one of its front panel input buttons or issuing the SIS command X!! also selects the same input on the A/V switcher.
Enabling front panel lockout (executive mode)
Executive mode disables all front panel controls, locking out the user from those functions. Putting the switcher in this mode enhances security by protecting against inappropriate or accidental changes to settings. When the SW USB is in executive mode,
To lock the front panel, press and hold Input buttons 1 and
2 simultaneously for 5 seconds, then release them. The red Exec Mode LED on the front panel lights, indicating that executive mode is enabled.
SW USB Series • Operation | SW USB Series • Operation |
