Fluke 8842a instruction manual SRQ Mask, Set

8842A

Instruction Manual

BIT: 8

0

DECIMAL

VALUE:

7

RQS

64

6

ANY

ERROR

32

5

DATA

AVAILIBLE

16

4	3
CAL STEP	FRONT
COMPLETE	PANEL SRQ
8	4

2

0

2

1

OVER-

RANGE

1

Bit

1

2

3

4

5

6

7

8

Name

Overrange

Not used

Front panel SRQ

Cal Step Complete

Data Availible

Any Error

RQS

Not used

Set

An overrange condition occurs

Never

Front panel SRQ button pressed

Completion of store command (C0)

Output buffer loaded with any data (Readings, Error Messages. Get Responses)

An error condition occurs. At the same time the output buffer is loaded with an error message. This sets bit 5.

Any SRQ mask-enabled bit is set.

Never

Figure 3-8. Serial Poll Register

Cleared

Device command received, or Bus or Rear Panel Trigger, or Output buffer is read

Always

Device command received

Device command received

Device command received, or Bus or Rear Panel Trigger, or Output buffer is read

Device command received, or Output buffer is read

All SRQ mask-enabled bits are cleared

Always

For example, the serial poll register reads 00010000 (binary) when data is available. This value is read in binary by the controller, which might numerically reformat the value to 16 (decimal) or 10 (hexadecimal).

The serial poll register is cleared whenever the 8842A receives a new input command string.

3-51. The SRQ Mask

The SRQ mask is a two-digit integer that specifies which conditions will generate a service request. The SRQ mask is entered using the P1 command and can be read with the G1 command. The conditions corresponding to each SRQ mask value are listed under G1 in Table 3-1.

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