Operating instructions

Internal Acquire (AQS) Clock Frequency
Accuracy (INTERNAL
and
- INT

1 -
000)
Range
INTERNAL (X1 MAG)
INTERNAL (X10 MAG)
INT
_
1000 (X1
MAG)
TNT
_
1000 (X10 MAG)
External
_

_

_
Clock Input (EXT/AQR)
Maximum~lnput Voltage
Input Characteristic
Maximum
Input Frequency
BNC to
Interface Delay
- Acquire Stop Delay
Range
Jitter
(5
s/div
to 10 Ns/div)
Delay Accuracy
(+15° C to +35° C)
Mainframe
7844
1844
Option 21
Threshold Voltage
When
Characteristic
0 .5 s/Div
to 10 ,us/Div
TABLE 2-2
Mainframe Horizontal
Compatibility
g________ ._ .
Operatin
Conditions
the B Horizontal
compartment is displayed
by both Beam 1 and
Beam 2, a 71387 in the
A Horizontal compartment
will terminate the
B sweep display
at the
end of the A sweep .
TABLE 2-1 (CONT)
Electrical Characteristics
PR TRIGGER
ACQUIRE CLOCK
20 .48 mHz (millihertz)
to 20 .48 MHz as determined
by
the
TIME/DIV X10 MAG, and INT
_
1000 switches .
18 steps in a 1-2-5
sequence from 20 .48 Hz to 10 .24 MHz .
X10 magnifier increases frequency
by a factor of 10 to
a maximum of 20 .48 MHz
(16 steps to 50 /is/Div setting) .
18 steps
in a 1-2-5 sequence from 20 .48 mHz
(millihertz)
to 10 .24 kHz .
X10 magnifier
increases frequency by a
factor of 10 to
a maximum
of 20 .48 kHz (16
steps to 50 Ns/Div setting) .
Front-panel -
b~nc connector .
. . ._ .__
._~-~~_
-1
W%_____
00 kf2
within5
.
fTL compatible
.
~_
10 MHz .
0 .5 Ns~or less
.-_ . . . _ .
0 .2 or less to
at least 9 .9 times TIME/DIV setting .
0 .02% of TIME/DIV
setting or less .
Within 0 .5% of measurement
plus 5% of TIME/DIV setting .
Symptom
The B sweep display may
be shortened or disappear
as determined by the 71387
ACQUIRE-STOP DELAY
control .
Fully
~ Compatible
PerformanceRequirement
Cause
7000-SeriesMainframes with
four plug-in compartments have
interface connection A16 HI
in the A Horizontal compartment
and A16 LO in the B Horizontal
compartment . In the 7844, the
state of A16 is switchable
as determined by the
selection
of Beam 1 or Beam 2 display .
Specification--71387