Sony VTX-D800U - 3 Entering the TT Command Number; Cancelling a Command Entry; Example

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Service Manual
3 Entering the TT command number
The TT number is entered using the standard digit keys using the category defined for the STB type. Category
codes for equipment types other than this STB’s type must be rejected.
Depending on the type of equipment the number of digits available for commands will vary. Leading zero can
be omitted. If the full compliment of digits is not entered a 3 second time -out period will be required to elapse
before the command is activated. Automated entry mechanisms such as those used during manufacturing
should enter the full compliment of digits in order to avoid the STB and controller getting out of sync.
The following are defined digit lengths for current planned models…
Model Number of digits
VTX-D800U 3
VTX-D800E 3
VTX-D800N 3
3.1 Cancelling a command entry
Entering a ‘0’ digit after any other digit entry (thus making the command a multiple of 10) will immediately
reset the display and perform no action.
3.2 Example
VTX-D800U requires 3 digits. Therefore the following sequences would be valid to issue a test command…
Sequence Result
0 ⇒ 1 ⇒ 4
Executes command 14
1 ⇒ 4 ⇒ Timeout after 3 seconds
Executes command 14
1 ⇒ 0
Does not execute any command (cancels input)
0 ⇒ Timeout after 3 seconds
Cancels TT mode
0 ⇒ 0 ⇒ 0
Cancels TT mode