Tektronix 1A1, Инструкция по эксплуатации, Страница: 5 / 137

SECTION 1
CHARACTERISTICS
Type 1A1
Change information, if any, affecting this section will be found at the
rear of the manual.
Introduction
The Type 1A1 Dual-Trace Plug-In Unit contains two iden­
tical high-gain fast-rise calibrated preamplifier channels.
Either channel can be used independently to produce a
single display or electronically switched to produce dual­
trace displays. In addition, both channels can be com­
bined at the output, adding or subtracting according to
the settings of the polarity switches.
For single- or dual-trace operation, each channel has its
own input selector, attenuator, gain, polarity and position
controls so the display can be adjusted for optimum view­
ing and information.
In dual-trace operation there are two operating modes,
chopped or alternate. In the chopped mode, an internal mul­
tivibrator switches the channels at a free-running rate of
about 1 MHz. In the alternate mode, the oscilloscope time-
base generator internally switches the channel at the end
of each sweep during the retrace interval.
Each channel has a basic deflection factor of 0.005 volt/
cm. Channel 1 can be used as a 10X (uncalibrated) AC-
coupled preamplifier for Channel 2, thus extending the de­
flection factor of Channel 1 to 500/x.V/cm.
The Type 1A1 can be used with any of the Tektronix
530-, 540-, or 550-Series oscilloscopes. It can also be used
with the 580-Series oscilloscopes in conjunction with the Type
81 or 81A Plug-In Adapter. The Type 1A1 can also be used
with other oscilloscopes and devices through the use of the
Types 127, 132, or 133 Plug-In Power Supplies.
CALIBRATED PREAMPLIFIER
Characteristic
Performance Requirement Supplemental Information
Deflection Factor
5mV/cm to 20 volts/cm in 12 calibrated steps for
each channel.
Steps in 1-2-5 sequence.
Deflection Accuracy
Within ± 3 % of indicated deflection with VARIABLE
VOLTS/CM control set to the CALIB position. With gain correct at 50 mV/cm.
Variable Deflection Factor
Uncalibrated deflection factor at least 2.5 times the
VOLTS/CM indication. This provides a maximum
uncalibrated deflection factor of 50 volts/cm in the
20 volts/cm position.
Frequency Response (not more
than —3 dB): Type 1A1 with
Tektronix oscilloscopes;
~ 5 0 0 /x.V/cm
Channels 1 and
and 2
cascad­
ed.
5 mV/cm 50 mV/cm
With VARIABLE VOLTS/CM con­
trol set to CALIB.
544, 546, 547, 556, 581, 58lA,
585, or 585A
2 Hz to 15 MHz DC to 28 MHz DC to 50 MHz
Using a Type 81A Plug-In Adapt­
er with Type 580-Series Oscillo­
scope.
581, 581 A, 585 or 585A
2 Hz to 14 MHz DC to 23 MHz DC to 33 MHz
Type 81 Plug-In Adapter must be
used.
541, 541 A, 543, 543A, 543B,
545, 545A, or 545B
2 Hz to 14 MHz DC to 23 MHz DC to 33 MHz
551 or 555
2 Hz to 13 MHz DC to 21 MHz DC to 27 MHz
531, 531 A, 533, 533A, 535, or
535A
2 Hz to 10 MHz DC to 14 MHz DC to 15 MHz
536 2 Hz to 8 MHz
DC to 10.5 MHz DC to 11 MHz
1Risetime (calculated minimum):
Type 1A1 with Tektronix oscillo­
scopes;
Using a Type 81A Plug-In Adapt­
er with Type 580-Series Oscillo­
scope.
544, 546, 547, 556, 581, 581 A,
585, or 585A
24 ns 13 ns 7 ns
’Calculated using this formula
• 35
Risetime = — --------------
’ Frequency
’ Use the upper bandwidth limit stated for the system.
1-1