Introduction - Tektronix 7A19 Instruction Manual

Introduction
The 7A19 Amplifier plug-in unit is a wide band amplifier
designed for use with TEKTRONIX 7000-Series oscillo-
scopes . Readout encoding circuitry is provided in the 7A19
to allow probe coding, deflection factor readout, and
IDENTIFY functions. The 7A19 can be operated in any
compartment of the 7000-Series oscilloscopes, but is pri-
marily intended for use in the vertical plug-in compartments.
Characteristic
Deflection Factor °
Calibrated Range
Gain Ratio Accuracy
Frequency Response (8 divi-
sion reference, mainframe
dependent)
Upper Bandwidth AC or
DC coupled 10 mV/div
to 1 V/div
Lower Bandwidth
AC Coupled
Maximum Input Power
DC or AC coupled
Voltage (AC coupled)
Input Impedance
Resistance (DC or
DC GND)
Reflection Coefficient
(Time Domain)
Maximum Input Current
REV . B, SEPT . 197 7
1 kHz or less
50 ohms ±1 ohm
Less than 0.2 mA
TABLE 1-1
ELECTRICAL
Performance Requirement
Less than 0.1 peak to peak
Option 4
10 mV/div to 1 V/div, 7 steps in a 1, 2, 5
sequence
Within 3% with GAIN adjusted at 10
mV/div when driven from 50 ohm source .
With 7400, 65 MHz ; With 7500, 100
MHz ; With 7700, 175 MHz ; With 7900,
500 MHz
2 watts average or 50 divisions peak
deflection .
100 volts (DC + peak AC) not to . exceed
2 watts average or 50 divisions peak .
Section 1-7A19
The following electrical characteristics are valid over the
stated environmental range for instruments calibrated at an
ambient temperature of +20° C to +30° C, and after a five
minute warmup unless otherwise noted .
An optional VARIABLE DELAY may be ordered with
the 7A19 to provide a signal delay of up to ±500 ps .
Supplemental Information
Pre-Charge circuit may be used as a
calibrated 100X attenuator
Front panel GAIN control allows calibra-
tion to mainframe.
CA U °77ON
Pre-charge circuit must be used for both
charging and discharging AC coupling
capacitor to potentials greater than 50
divisions equivalent voltage.
VSWR is typically less than 1 .25 @ 500
MHz