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HP 5384A and HP 5385A
Operation and Programming
most character is CHARACTER 1 and the rightmost is
CHARACTER 12. The scale or units designation will
normally be shown in character positions 10, 11, and
12. If positions 10 and 11 are required to display a high
resolution measurement, only character position 12
will be used to designate the scale or units.
3-18.
Annunciation for all operating modes is also
indicated by the display. When a mode is selected, an
arrow appears at the bottom of the display just above
the name of the mode label on the front panel.
3-19.
Keyboard
3-20.
The keyboard, located on the front panel, is a
14-position pushbutton assembly which is connected
to a port on the microcomputer. The keyboard is
divided into several groups, according to the purpose
of the keys. From the left after the power switch, we
have A, B, A&B, GATE, and DISPLAY DIGITS keys.
3-21.
A blue RESET /lOCAl key and the CHECK key
complete the keyboard assembly of the counter.
3-22.
INPUTS
3-23.
Immediately to the right of the keyboard is the
INPUTS section. There are two BNC inputs (Channels
A and B) and a control for either adjusting the trigger
level of Channel A or attenuating the input signal to
Channel B.
3-24.
Power-Up/Self-Check
I
WARNING
I
BEFORE
USING
THE
INSTRUMENT,
ALL
PROTECTIVE EARTH TERMINALS, EXTENTION
CORDS, AUTOTRANSFORMERS AND DEVICES
CONNECTED TO IT SHOULD BE CONNECTED
TO A PROTECTIVE EARTH GROUNDED SOCKET.
ANY INTERRUPTION OF THE PROTECTIVE
EARTH GROUND WILL CAUSE A POTENTIAL
SHOCK HAZARD THAT COULD RESULT IN
PERSONAL INJURY.
Before energizing the counter, the instrument
must be set to the voltage of the power source or
damage to the instrument may result. See
Section II.
3-25.
When you power-up the counter, an internal
check is automatically made of several major com-
3-2
ponents in its circuitry. During this cycle, all12liquid
Crystal Display (LCD) digits will be momentarily
activated in a starburst pattern. Also activated are the
colons and annunciators. The address of the interface
will briefly be displayed.
3-26.
After the power-up sequence, the counter ini-
tializes itself. That is, Frequency A mode is selected for
display and the preset trigger level mode is selected.
The ATTN and lPF modes are disabled, and the gate
time is set to 0.1 s. If no input signal is present after the
Power-Up cycle, 00000000 will appear on the display.
The power-up initialize state is listed in Table 3-1.
Table 3-1. Power-Up Initialize States
FUNCTION
STATE
REMOTE/LOCAL
LOCAL
GATE TIME
0.1
s
MANUAL LEVEL
OFF
WAIT-TO-SEND
OFF
DISPLAY DIGITS
NORMAL
FUNCTION
FREQ A
X20 ATTN
X1
FILTER
OFF
REMOTE DISPLAY
OFF
3-27.
Any failure during the power-up cycle will
cause an error message to be displayed momentarily.
After the error is displayed, the counter will attempt
to operate normally.
3-28.
Error Messages
3-29.
The counter will display error messages when-
ever the instrument enters an error state. Errors can
occur either during self-test or after an improper
operation has been attempted through the interface.
3-30.
If an error occurs during power-up self-test,
error messages will appear on the display. The mes-
sage will be displayed for approximately one second
to give the operator sufficient time to read the
message. One second after the error is displayed, the
counter will attempt to operate normally.
3-31.
If an error occurs during the power-up self-
test, the ERROR annunciator will be turned on. This
annunciator will stay on as long as the instrument
does not enter the diagnostic mode to warn the
operator of potentially inaccurate results.
3-32.
Several types of errors can occur when an
improper operation is attempted through the inter-
face. Whenever an error message is generated be-
cause of an illegal operation, the error message will
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Table of Contents
Troubleshooting
