Racal Instruments 1994 Service Manual page 69

Table
3.1
-
Front Panel Controls,
Indicators,
and Connectors
(Cont'd)
Reference
Item
Function/Description
RECALL
Key
Recalls constants
for
math
functions,
gate time, time-interval
delay, special
functions,
and peak
A
and B
levels.
Used
with
MEMORY
key
to recall
complete
measurement
(i.e.,
machine)
setups
(IjiP)
MEMORY
Key
Stores and
recalls
complete measure-
ment
setups
(SHIFT
STORE/RECALL
MEMORY<N>where<N>=
0 to
9).
At-
tempted
store or recall of
an out-of-
range
setup
number
produces "Op
Er" as
error
message
GATE
Key
Stores and
recalls
gate time
using cor-
responding key sequences
<
value)
SHIFT
STORE GATE
or
SHIFT
RECALL
GATE.
The programmable
gate time
range
is
200 ns to 99.9
s.
Gate times are
rounded
off to the
nearest
25.6
jus
for
display, but
can be entered
in
any
valid
step
size
(1SB)
ADDR
Key
Used
to display the counter's
GPIB
address
using
key sequence SHIFT
RECALL
ADDR.
See Subsection
4.3 for
the address setting procedure
X/Y/Z
Keys
Store and
recall of
Math
computation
constants X, Y, and Z
INPUT A
and
B
Keys/LEDs
Toggle
the counter
in
and out
of the
Auto-Trig mode
for Inputs
A
and
B.
The
AUTO-TRIG LED
lights in
the Auto-Trig
mode.
Press the
TRIG-LEVEL
key
to
display the trigger level
@
AUTO-TRIG
Keys/LEDs*
(16B)
TRIG-LEVEL
Keys/LEDs*
Successive operations display
Input
A
or
B
trigger levels or store the displayed
trigger
levels,
returning the counter
to
its
main
function.
The
TRIG-LEVEL
LED
flashes
when
the trigger
level
is
being
displayed.
The
displayed
trigger
level
can
be
changed
using either the
LEVEL
keys
or via
the
front
panel
keyboard.
3-13