Tektronix Type Z Instruction Manual page 5

General nformation
The Type Z Plug-In Unit is a calibrated differential com ­
parator preamplifier designed for use in all Tektronix
Type 530-, 540-, 550-, or 580- eries Oscilloscopes.
unit may be used for three different modes of operation:
(I) as a conventional plug-in preamplifier, (2) as a differential
input preamplifier, or (3) as a calibrated differential com ­
parator.
As a conventional preamplifier, the Z Unit alone has a
risetime of 24 nanoseconds and a maximum sensitivity of
0.05 volt per centimeter of deflection. Table 1 - 1 summar ­
izes the risetimes and bandwidths available when the Z
Unit is used in combination with various types of Tektronix
oscilloscopes.
TABLE l-l
Z Unit and Rise t ime in
Type: Nanoseconds* Megacycles/ econd*
532 70
531 or 535 39
536 40
531 A, 533, or 535A 35
27
541, 543, 545,
541 A, 545A,
551, or 555
581 or 585** 27
*For signals which do not overscan the graticule.
**Type 81 Adapter must be used.
In differential input mode of operation, the dynamic
range of ± 1 00 volts allows the application of common ­
mode signals up to 1 00 volts to be applied to the unit with ­
out attenuation. The common-mode
40,000 to 1 at d c or low frequencies allows measurement
of differential signals less than 50 mv in amplitude on
±100- volt common-mode signals.
As a calibrated differential comparator, the Z Unit has
an effective screen height of it 2000 cm at maximum sensi ­
tivity. Within the dynamic range of ±100 volts, calibra t ed
±DC comparison voltages can be added differentially to
the input waveform to permit a maximum of 0.005% or
5 mv per mm to be accurately resolved.
SPEC F CAT ON S
Vertical Deflection Factors
also continuously variable (uncalibr a ted) between steps and
up to 60 volts per centimeter.
The
nput mpedance
Maximum Allowable Combined DC and Peak AC
nput
Bandwidth, — 3 d B ,
Maximum Common-Mode Signal
5
9
are permissible with larger vertical deflection factors.
9
10
Common-Mode Rejection Ratio
13
wave, lower at other sensitivities and higher frequencies.
13
mode signal produces less than 1 mm of vertical deflection.
Comparison Voltages Available
rejection ratio of
± 10 volts, and 0 to ±1 00 volts.
potentiometer is used to select the comparison voltages
over these ranges.
Comparison Voltage Regulator
sentially constant and independent of normal power supply
voltages supplied by the oscilloscope.
0.05 to 25 volts per centimeter in nine calibrated steps;
1 megohm ±1 % paralleled by 24 pf.
600 volts, ac-coupled.
±100 volts at 0.05 volt per centimeter. Higher voltages
40,000 to 1 at 0.05 volt per centimeter with a 1 -kc sine
At 0.05 volt per centimeter, a 200-volt (p-p) 1 -kc common ­
Three voltage ranges are provided: 0 to ± 1 volt, 0 to
A regulator circuit maintains comparison voltages es ­
ON 1
An accurate 10-turn
1-1