Tektronix 3A9 Instruction Manual page 5

SECTION I
SPECIFICATION
Change information, if any, affecting this section will be found at the
rear of the manual.
Introduction
The Type 3A9 Vertical Plug-in is a DC coupled differential
amplifier with excellent common-mode rejection and high
gain characteristics for low level applications.
The DC Offset capability of the Type 3A9 allows the dis-
play of very small AC signals, containing a large DC com-
ponent at deflection factors not possible with AC coupling.
The vertical deflection factor of the Type 3A9 is variable
from 10 pV/Div through 10 V/Div. The high and low —3 dB
frequencies which can be selected at the front panel, set the
bandwidth. Thus, for low frequency applications the signal-
to-noise ratio can be improved by restricting the bandwidth of
the Type 3A9.
The Type 3A9 is designed for use in Tektronix Types 561A,
561B, 564, 564B, 565, and without digital readout in the Type
567/6RTA and 568/230. Used with the Type 129 Power Sup-
ply, the Type 3A9 can drive recorders, X-Y Plotters, oscillo-
scopes and other indicators.
The instrument will perform as stated under the Perform-
ance heading, within an ambient temperature range of 0° C
to +50° C (after a 1 minute warmup) provided that the
instrument has been calibrated within an ambient temperature
range of +20°C to +30° C. Warmup time for given ac-
curacy is 5 minutes.
ELECTRICAL CHARACTERISTICS
Characteristic Performance Requirement
Deflection Factor
Calibrated Range 10 pV/DIV to 10V/DIV; 19 steps
in a 1-2-5 sequence, or 1 mA/DIV
Accuracy
Voltage Within 2%
Current Within 3%
Uncalibrated Continuously variable; extends de-
(Variable) flection factor to at least 25 V/DIV.
Differential Dynamic
10 pV/DIV to 10mV/ | TV
20mV/DIV to .1V/ | 10V
.2V/DIV to 1V/DIV} +100V
2V/DIV to 10V/DIV | +1000 V (500 V maximum, each
input}
Characteristic Performance Requirement
Frequency Response (Full
Graticule Reference with
voltage input)
Overall Response DC
(Direct) Coupled Input
AC (Capacitive)
Coupled Input, Lower
Bandwidth Frequency
DC to 1 MHz, —0%, +30%
1.6Hz within 5%
Bandwidth Limit (—3 dB
points) Accuracy
High
300 kHz to 100 Hz
Low
0.1 Hz to 10 kHz
Within 12% of value indicated
by UPPER —3dB FREQUENCY
setting. 9 steps in a 10-3-1 se-
quence
Within 12% of value indicated
by LOWER —3dB FREQUENCY
setting. 6 steps in a 100-10-1 se-
quence
Current Probe Frequency At least 10Hz to 1 MHz (—0%,
Overdrive Recovery 10 ys or less to recover to within
0.5% of zero level after removal
of a + or — test input applied
for at least 1 second. Test signal
not to exceed differential dynamic
Common Mode Dynamic
Range
+100 V
£500 V
Input Overdrive Light
over-
Ratio
AC (Capacitive)
Coupled
See Graph, Fig. 1-2
See Graph, Fig. 1-2
10 A, peak to peak