Specifications; Electrical - Tektronix T921 Instruction Manual

This manual includes instructions for the T921, T922
and T922R portable oscilloscopes . The T922 is a 15 MHz,
dual trace, oscilloscope and the T921 is a 15 MHz, single
trace oscilloscope . The Vertical Amplifier, either single
trace or dual trace, 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(s) and provides calibrated sweep rates from
0.5 s/div to 0.2 Ns/div . A variable X1 to X10 magnifier
extends the maximum sweep rate to 20 ns/div .
The T992R is a rackmount verison of the T922 os-
cilloscope which takes 5-1/4 inches of rack space.
Characterist ic
Probe Adjust Output
Voltage (0°Cto
+40° C)
Repetition Rate
Z-Axis Input
Sensitivity
Signal Polarity
T921 and T922
T922R
REV. C APR 1977
Performance Requirement
A. DISPLAY
Approximately 0.5 V.
Approximately 1 kHz.
5 volt signal causes a noticeable
decrease in intensity.
Positive going from ground .
Either polarity of signal can be
applied, depending upon internal
jumper connections .
SPECIFICATIONS
TABLE 1-1
Electrical
Features added to the rackmount version include: single
sweep; rear panel outputs for Sweep Gate, Sweep Ramp,
and Vertical Signal ; internally selectable Z Axis polarity ;
user selection of the CHOP or ALT dual trace modes ; and
switch-selectable front-panel or rear-panel inputs for
CH 1, CH 2, and EXT TRIG signals.
The following instrument specifications apply over an
ambient temperature range of 0°C to +45°C unless
otherwise specified . The Adjustment Procedure in Section
4, when performed completely, allows the T921/T922/
T922R to meet the electrical specifications listed in Table
1-1 .
Characteristic
Line Frequency
1 50 to 60 Hz .
Maximum Power
Consumption
CRT Display
Display Area
Trace Rotation
Range
Standard
Phosphor
Nominal Accel-
erating Potential
Section 1-T921/T922/T922R
36 W, 0.35 A at 60 Hz, 120 V line .
8 x 10 cm .
Adequate to
align trace with
horizontal center line .
P31 .
Performance Requirement
12,400 V.
B. VERTICAL AMPLIFIER
Usable Frequency
Range
Dc to 5 MHz.
Deflection Factor
Maximum Input
30 V (dc + peak ac) 30 V p-p at
Range
2 mV/div to 10 V/div;12 steps in a 1-
Voltage 1 kHz or less .
2-5 sequence .
Input Impedance Approximately 10 kit.
Accuracy
Power Source
(T922R 120 V-240 V Range and
Line Voltage
HI-LO adjustments are not exter-
+20° C to Within 3% .
Ranges (ac,rms)
nally accessible) .
+30° C
120 V Range HI-108 to 132 V.
O' C to +451 C Within 4% .
LO-90 to 110 V.
Uncalibrated Continuously variable between
240 V Range HI-216 to 250 V. (VAR) Range
settings . Extends deflection factor
LO-198 to 242 V.
to at least 25 V/div (at least 2.5 :1) .