Tabor Electronics Ltd. - OED

Table 3-1. Default State After Front Panel Reset.
3-10. Front Panel Error Indication
In general, whenever a front panel or GPIB programming
attempts to place the 8024 in an error condition,
the Model 8024 responds by front panel error indication
or by addressing the IEEE-488.2 service request register.
Errors are categorized in four main groups:
1. General errors
2. Limit errors
3. IEEE errors
3-10-1. General Errors
Errors in this group are caused by improper usage of
the instrument. Such errors occur while attempting to
place the instrument in an illegal mode. For example,
depressing simultaneously two buttons (except [1st
MENU]) has no valid definition or by depressing the
MANUAL button while the instrument is in its continuous
operating mode. In such cases, the instrument
simply ignores this error and continues with its normal
operation.
3-10-2. Limit Errors
Errors in this group are caused by an attempt to program
values outside the legal limits of the instrument. For
example, trying to program frequency value of 50 MHz
for the standard triangle waveform. In this case, the
LED above the OUTPUT connector starts blinking, indicating
that the output waveform may not look as
expected. Table 3-2 summarizes all front panel entry
limits.
3-10-3. IEEE-488.2 Errors
Operating Instructions
FUNCTION DESCRIPTION DEFAULT STATE
FREQ Frequency 100.0KHz
AMPL Amplitude 1.00V
OFFS Offset +000mV
FILTER Analog filter Auto (sine filter)
TRIG_COUN Trigger counts (Burst) 00001
INT_PER Internal trigger period 1.00s
SOURCE Trigger source External
SCLK Sampling clock 10.00Msps
Reference Clock Arbitrary clock source Internal
SEG01= Segment size 0
STEP01= Segment size SEG01*0
General Status
DISPLAY Main menu parameters FREQ
MODE Operating mode selection Continuous
STATE GPIB status Local state
WAVEFORM Output waveform Sinewave (standard)
ST-BY Output stand-by mode Off
In general, whenever a GPIB programming attempts
to put the Model 8024 into an error condition, the function
generator responds in two ways. First by displaying
a front panel message and than, if programmed so, by
raising an SRQ flag in its Status Byte Register. Using
the Serial Poll command, the controller may then address
the generator and request its status byte.
The generator incorporates a number of display messages
which are associated with errors involving GPIB
interface programming. These messages are discussed
in detail in Section 4 of this manual.
There is one message however, which should be
explained at this point because it may interfere with
front panel operation. A remote enable or a device
dependent command, sent to the instrument through
the bus, turns the REMOTE light on. In this case, all
front panel buttons except [LOCAL] are disabled. Pressing
any button generates the following message:
3-5