Tektronix 1A5 Instruction Manual page 16

Operating Instructions — Type 1A5
switching occurs between the 20 mV and 50 mV positions
(from ×1 to × 10); between the
(from ×1 0 to ×1 00); and between the 2 V and 5 V posi ­
tions (from ×1 00 to ×1 000).
Three differently shaded green arcs are printed adjacent
to the attenuator switching flange.
bracketed by the two black radial lines (range indicators)
on the range indicator flange indicates the attenuator in
use, the Input Signal Range, the Equivalent Comparison
Voltage Range and the maximum input voltage range in
effect at any instant. The color translation is given in
Table 2-1.
For convenient reference, the Input Signal Range and the
Equivalent Comparison Voltage
printed on the green arcs and on the separate color cod ­
ing explanation near the top right of the Type 1A5 front
panel.
CAUTION
The difference between the voltages into the A
and В INPUT connectors must never exceed the
Maximum Input Voltage Range given in table 2-1.
Outer
Ring
Dial
Red
(A) Comparison Voltage Control Unit
( C) Vc setting 2-6-0.
at 1 V/CM.)
actual Vc and 260 V Equivalent
Comparison Voltage.
2- 8
. 2 V and .5 V positions
The specific shade
Range translations are
Stationary
Indicator
Section
Knob
(VOLTS /СМ set
Represents 2.60 V
Fig. 2-8. Comparison Voltage IVc) control.
Fig. 2-7. Circuit connections for the slide-b a ck technique described
in the text.
Block
( B) Vc setting 2-3-7.
at 5 mV/ cm) .
actual Vc a nd
Comparison Voltage.
(D) Vc setting 3-4-0.
at 10 V/cm.) Represents 0.34 V
actual Vc and 340 V Equivalent
Comparison Voltage.
Black
( VO L TS/CM set
Represents 2.37 V
2.37 V Equivalent
Black
( VOLTS/CM set