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4-3DVS 150 Serial Communication
DVS error response
When the scaler receives an SIS command and determines that it is valid, it
performs the command and sends a response back to the host device. If the scaler
is unable to perform the command because the command is invalid or contains
invalid parameters, the scaler returns an error response to the host. The error
response codes are:
E01 — Invalid input channel number (too large)
E09 — Invalid function number (too large)
E10 — Invalid command
E13 — Invalid value (out of range)
Using the command/response table
The command/response table is shown on the next page. Lower case characters
are acceptable in the command field only where indicated. Symbols are used
throughout the table to represent variables in the command/response fields.
Symbol definitions are shown at the beginning of the table, as is an ASCII-to-
hexadecimal (HEX) conversion table. Command and response examples are shown
throughout the table.
Screen adjustment commands are not available if input 4 is selected.
Remote Contact Closure Operation
The RS-232 connector provides a way to control the scaler from a remote contact
closure device. This is made possible by using pins that are not normally used by
the RS-232 interface. The contact closure pin assignments are shown in the table on
page 4-2.
To select a different input number through the RS-232 connector, momentarily short
the pin for the desired input number (#) to the signal ground (pin 5). To force one
of the inputs to be selected continuously, leave the short to signal ground in place.
This will override any front panel input selection.