NTRansition sets the negative transition. For each bit unmasked, a 1-to-0 transition of that bit in the Condition register sets the associated bit in the Event register.

PTRansition sets the positive transition. For each bit unmasked, a 0-to-1 transition of that bit in the Condition register sets the associated bit in the Event register.

<unmask > is the decimal, hexadecimal (#H), octal (#Q), or binary (#B) value of the Condition register bit to be unmasked. (The decimal values of bits 0, 2, and 8 are 1, 4, and 256.)

The Event Register The Event register latches transition events from the Condition register as specified by the Transition Filter. Bits in the Event register are latched and remain set until the register is cleared by one of the following commands:

STATus:QUEStionable[:EVENt]?

*CLS

The Enable Register

The Operation Status Group

The Enable register specifies which bits in the Event register can generate a summary bit which is subsequently used to generate a service request. The digitizer logically ANDs the bits in the Event register with bits in the Enable register, and ORs the results to obtain a summary bit.

The bits in the Enable register that are to be ANDed with bits in the Event register are specified (unmasked) with the command:

STATus:QUEStionable:ENABle <unmask >

<unmask > is the decimal, hexadecimal (#H), octal (#Q), or binary (#B) value of the Enable register bit to be unmasked. (The decimal values of bits 0, 2, and 8 are 1, 4, and 256.)

The Enable register is cleared at power-on, by specifying an <unmask > value of 0, or by executing the STATus:PRESet command.

The Operation status group monitors current operating conditions within the digitizer. The specific conditions include: CALibrating, MEASuring, entering the wait-for-arm state, and execution of the INITiate[:IMMediate] command.

168 Understanding the HP E1429 Digitizer

Chapter 3

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HP E1429A manual Operation Status Group, Enable Register