Tektronix Type 82 PLUG-IN Instruction Manual page 14

-_ + +
C e u t e u n e o u w e t
T e r r r t
+ > + +
4 T
4
T
n T
(a) System: Type 110/502 Term./P6008/82/585.
Reflection (no extension cable)
4
4
p e p e y a y
T O O T t -
n
t
ia
t
Reflection (2-nsec delay cable added
moves reflection 4 nsec to
the right.)
HHH +++ AN ++H4 t +++
RG-58A/U_ (extension) cable/50 0 Term./82/585,
+ +
Fig. 2-7. Waveforms obtained when a pulse from the Type 110
is applied to each of the above series-connected systems. Applied
pulse duration is 22 nsec and risetime is 0.25 nsec; Type 82/585
vertical deflection factor; 2 volts/cm, sweep rate: 10 nsec/cm.
frequency distortion of signals with components below this
frequency can be expected when using the AC position. For
example, low-frequency distortion can be seen when display-
ing the 1-kc calibrator waveform. By using the P6008 priobe
in conjunction with the Type 82, you can extend the low-
frequency response to about .5cps in the AC position.
Deflection Factor
The amount of vertical deflection produced by a signal is
determined by the signal amplitude, the attenuation factor
(if any) of the probe, setting of the V/CM switch, and the
flection factors indicated by the settings of the V/CM switch
Operating Instructions—Type 82
apply only when the VARIABLE VOLTS/CM control is set
fully clockwise to the CAL. position. Errors in display
measurements may result if the setting of this control is un-
intentionally moved away from its CAL. position.
The range of the VARIABLE VOLTS/CM control is ap-
proximately 2 to 1 to provide variable (uncalibrated) verti-
cal-deflection factors between calibrated settings of the
V/CM switch. Since the maximum attenuation ratio of the
VARIABLE VOLTS/CM control is approximately 2 to 1, the
control does not provide continuously variable (uncalibrated)
vertical deflection factors between the 2-5 steps of the V/CM
switch. For example, if the V/CM switch is set to .2 and
the GAIN switch is set to X1, the range of the VARIABLE
VOLTS/CM contro! will be from 0.2 to about 0.4 volt per
centimeter. However, the control does provide nearly full
coverage between the 1-2 steps of the V/CM switch. For ex-
ample, if the V/CM switch is set to .1 and the GAIN switch
is set to X1, the range of the VARIABLE VOLTS/CM control
will be from 0.1 fo about 0.2 volt per centimeter.
The VARIABLE VOLTS/CM control extends the basic verti-
100 volts per centimeter when the GAIN switch is set to X1
and the V/CM switch is set to 50. If the GAIN switch is set to
particularly when using the dual-trace feature of the Type
82. The A POLARITY and B POLARITY switches have two
will have the same polarity as the input signal. In the
effect of the VERTICAL POSITION control.
Mode Switch
switch to the corresponding position—A ONLY or B ONLY.
ONLY to display the channel A input signal; B ONLY to
display the channel B input signal.
To display two signals simultaneously (dual-trace opera-
tion), connect a signal to each input connector and set the
MODE switch to the ALTER. or CHOP. position. In general,
2-7