Anadex DP-9000 Operator's Manual page 27

EMPTY
OUTPUT
PE
OUTPUT
SELECT
OUTPUT
FAULT
OUTPUT
BIAS
OUTPUT
SIGNAL
LEVELS
BUFFER EMPTY - This is an active low signal
which indicates that the FIFO buffer is ready
to accept a data dump of its maximum capacity.
This· signal is particularly useful in graphics
and CRT dumps. The signal goes high coinci-
dentally with BUSY going high, but remains high
until the FIFO buffer becomes empty.
- PAPER ERROR - This is an active high signal
indicating an Out-of-Paper condition.
~en
an
Out-of-Paper condition is sensed, this signal
goes high, and after the next
DSfR
the BUSY
signal goes high. SELECT and FAULT both go low
immediately, and the ON LINE indicator light
extinguishes. ACK and IBZ remain high. When
the paper has been replenished, PE goes low,
and when the ON/OFF LINE front panel switch is
momentarily depressed, SELECT and FAULT return
to their normal high condition. ACK and IBZ go
low at their proper times, and the printer con-
tinues to process the data.
- (ON LINE) - This signal is active high.and
ind~cates that the printer is ON LINE (Selected)
and available for printing. SELECT goes low
when a paper error is sensed, and INPUT PRIME
signal is received, or the front panel ON/OFF
LINE switch is depressed, causing the printer
to go OFF LINE. If the cause of the OFF LINE
was "receipt of an INPUT PRIME signal, then
return to the ON LINE (SELECT) condition is
automatic after reinitialization. For all other
conditions, return to the ON LINE condition
requires that the operator press the ON/OFF LINE
switch.
- This signal is identical with SELECT, as des-
cribed above.
- This is a 5 Vdc voltage source available for
test purposes. It is current limited by a 2.7
ohm series resistor.
- All Logic 1 (High) signals are
+
2.4 Vdc to
+
5.0 Vdc. Logic
0
(Low) signals are specified
as less than
+
0.8 Vdc. Current sinking capa-
bilities are as specified below:
2-13