Tektronix T912 - Page 9

Section
1—T912
SPECIFICATIONS
The
T912 is a 10
MHz,
dual
trace,
portable
os-
cilloscope.
The T91 2
bistable
storage system has
a
writing
speed of up to
250 cm/ms in
the
ENHANCED
mode.
The
Vertical
AMPLIFIER provides
calibrated
deflection
factors
from 2
mV to 10
V/div.
The
TIME
BASE
provides
stable
triggering
over
the
full
bandwidth
of
the
Vertical
AMPLIFIER,
Calibrated
sweep
rates
are
from
0.5 s to
0.5/L/s/div,
A variable
XI to
X10
magnifier
extends the
maximum sweep
rate of
50
ns/div.
The
following
instrument
specifications
apply
over an
ambient
temperature
range
of 0°C to
+45°C unless
otherwise
indicated.
The
Adjustment Procedure in
Sec-
tion
4,
when
performed
completely,
allows the
T912 to
meet
the
Electrical
Specifications
listed in
Table
1-1.
Items
listed
in the
Performance
Requirements
column are
verified by
completing the
Performance
Check in
Section
5
of
this
manual.
Table
1-1
ELECTRICAL
Characteristic
Performance
Requirement
A.
DISPLAY
Probe
Adjust
Output
Voltage (0°C
to
+40°
C)
Approximately
0.5 V.
Repetition
Rate
Approximately
1
kHz.
Z-Axis Input
Sensitivity
5
volt signal
causes
a
noticeable
decrease
in
intensity.
Signal
Polarity
Positive
going
from
ground.
Usable
Frequency
Range
Dc to
5 MHz.
Maximum
Input
Voltage
30
V (dc
+
peak ac) 30
V
p-p
at
1
kHz
or
less.
Input
Impedance
Approximately 10
kQ.
Power Source
Line Voltage
Ranges (ac,
rms)
120
V Range HI—
108 to 132
V.
LO--90
to
110 V.
240 V Range
HI—216 to
250 V,
LO—
198 to
242
V.
Table
1-1
(cont)
Characteristic
Performance
Requirement
A.
DISPLAY (cont)
Line
Frequency
50 to
60 Hz.
Maximum
Power
Consumption
80
watts.
100
VA,
at 60
Hz.
CRT
Display
Display
Area
8X10 cm.
Trace
Rotation
Range
Adequate
to
align
trace
with
horizontal
center line.
Standard
Phosphor
P1
Nominal
Accel-
erating
Potential
2,760
V,
Storage
Display
Writing
Rate
At
least 25
cm/ms.
Enhanced
Writing
Rate
At
least
250
cm/ms.
Storage
Viewing
Time
One
hour
or
less.
(Storage
time
longer
than
1 hour
will
make
erasure
difficult.)
B.
VERTICAL
AMPLIFIER
Deflection
Factor
Range
2
mV/div
to
10
V/div;
12
steps
in a
1-2-5
sequence.
Accuracy
l-20°G to
+30°
C
Within 3%
0°Cto
+45°
C
Within
4%.
Uncalibrated
Continuously
variable
between
(VAR)
Range
settings.
Extends
deflection
factor
to at
least 25
V/div
(at
least
2.5:1).
Frequency
Response
Bandwidth
Dc
to
at
least 10
MHz (5
division
reference
signal
centered
verti-
cally
from a
25
Q
source
with
VOLTS/DIV
VAR
control
in
cali-
brated
detent).
Risetime
35 ns
or
less.
BEV
B,
DEC 1978
1-1