HP 5344S User Manual

Operating Information
Model 8756A
4. Self Test failed.
5. Any front panel key pressed.
6. Numeric Entry completed (HP-IB or front panel).
7. Soft key only pressed.
8. Battery voltage low (for nonvolatile memory).
The actual condition may be determined by executing a Serial Poll and
then reading the Status Byte. A Serial Poll operation consists of
sending the HP 8756A its Talk address, sending the SPE (Serial Poll
Enable) message, reading the Status Byte on the bus, and sending the
SPD (Serial Poll Disable) message.
Both the Status Byte and Extended Status Byte are obtained by sending
the Output Status "OS" command and by immediately reading the two
byte values, respectively. The Status Bytes of the HP 8756A are
described in Table 3-6. The SRQ is cleared only by executing a
Serial Poll, Device Clear (DCL), Selective Device Clear (SDC),
PRESET, or sending the CS or OS commands.
The Request Mask function "RM" can be used to select a particular set
of condition(s) for initiating a Service Request (SRQ). The mask
value is determined by summing the decimal values of each selected
condition that needs to be determined. The default Request Mask is
zero (no SRQ's are initiated), which is reset to this value at power
on.
PRESET
A self test is first performed when the "IP" command is received by
the HP 8756A, followed by presetting conditions as described under
INSTRUMENT STATE, PRESET in Figure 3-1.
Figure 3-4. HP-/B Operating Features (7 of 7)
3-32

HP 5344S Specifications

General

Brand	HP
Model	5344S
Category	Measuring Instruments
Language	English