HP 8340A Operating Manual page 76

Model 8340A
DESCRIPTION
This display shows the active function and its present value, and contains the OVERMOD,
REMOTE, SRQ, FAULT, OVEN, EXT REF, and UNLK indicators.
PANEL LAYOUT
FUNCTIONS
The most recently activated function and its present value is shown in this display. In local
ope t i o n , the most recently pressed function key is the active function and will remain
ra
active until superseded by the pressing of another function key. The HP 8340A will
remember (for approximately one year) the activated function even when the power is
disconnected, and will display that function in the ENTRY DISPLAY when the power is
turned on. The HP-IB address ("HP-IB ADRS=
followed by a display of the active function.
In local operation, the active function can be changed by the rotary [KNOB], the [STEP]
keys, or the numerical keypad. First:, press one of the function keys to make that function
active and display its present value in the ENTRY DISPLAY. Then, change the value of that
function by using either the [KNOB], the [STEP] keys, or the numerical keys (with a
terminator key).
In remote operation, the ENTRY DISPLAY will show the last function programmed.
ENTRY DISPLAY can be blanked (turned off) by pressing [ENTRY OFF]; the d i
remain blanked until one of the function keys is pressed.
ENTRY DISPLAY can also be blanked by pressing [SHIFn [CONn, which turns off all of
the displays. The displays will remain hlanked even when the function keys are pressed
(although the annunciators will change). To regain a live display, press [SHIFn [CONl]
again.
INDICATORS
ENTRY DISPLAY contains two ty' p es of indicators:
and red warning annunciators.
REMOTE (amber) annunciator lights when the HP 8340A is being remotely controlled by a
computer. When REMOTE is lighted, all front panel operations are disabled with three
exceptions: The POWER switch can only be locally operated, the rotary [KNOB] can be
enabled by using the EK programming code, and the [LOCAL] key will override the
computer and restore local control
command to the HP 8340A, which disables the [LOCAL] key).
OVERMOO REMOTE SRO
FAULT
ENTRY DISPLAY
H P I B AD R S
-
( n l e
u s
Figure 3-6. Entry Display (1 of 2)
Scans by HB9HCA and HB9FSX
EXT REF UNLK
OVEN
19
:
is displayed momentarily at power-on,
19")
amber identification annunciators,
s the computer sent a LOCAL LOCKOUT
Operating Information
p la y will
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