Tektronix 213 DMM Instruction Manual page 106

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213 Service
VOLTAGE AND WAVEFORM CONDITIONS
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WARNING
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Dangerous potentials exist at several points throughout this instrument. Do not
touch connections or components when the instrument is operated with the ca-
binet halves removed. Some transistors have voltages present on their cases or
tabs. Disconnect the power cord plug from the power line, and the batteries be-
fore cleaning the instrument or replacing parts.
The voltages and waveforms shown on the diagrams can be obtained by using the recommended test equipment and
test set-ups listed below. Where test set-ups have special conditions, the waveform or voltage is annotated with a
number in parenthesis, (e.g. (3) ), and explained in SPECIAL CONDITIONS on the schematic page.
RECOMMENDED TEST EQUIPMENT
Item
Specification
Recommended Type
Oscilloscope Bandwidth DC to 1 MHz a. Tektronix 213 (also provides
Digital Multimeter listed below)
Minimum Deflection 20 mV/div b. Tektronix 221
Factor
Minimum Time Base 10 µs/div
Digital Multimeter (for Input Impedance 10 Mn a. Tektronix DM501 (requires
voltages up to 1 kV)
TM500 Power Module)
Range 0 to 1 kV b. (DMM portion from 213 above,
useable to 800 Vdc)
DC Voltmeter (for Input Impedance 20,000
n;v
Triplett Model 630NA (also used
voltages above 1 kV) above 800 Vdc when 213 is used)
Range 0 to at least 1.5
kV
.
Pulse Generator Output Frequency 1 kHz Tektronix FG501 (requires TM500
Power Module)
Output Voltage 4 V p-p
Duty Factor 20%
Sinewave Generator Output Frequency
1 kHz Tektronix FG501 (Requires TM500
Power Module)
Output Voltage 5 V p-p
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VOL TS-mA/D IV
SEC/DIV
RMS
VOLTS
INPUT COUPLING
POWER
213 Control Settings
1 (black scale)
.2
m
Button out
Button in
GND
ON
INTL AC AUTO TRIGGER
LEVEL/SLOPE
Midpoint of one of the slopes (adjust for a stable pattern
when an input signal is applied)
INTENSITY
VOLTS-mA/DIV VAR
HORIZ MGF VAR
POS
(vertical)
POS (horizontal)
DMM
Minimum for a visible display
CAL detent
CAL
detent
Set trace on center horizontal graticule line.
Set for trace to end at right vertical graticule line.
Set for mode of operation during which circuit under
test is used. Circuits serving both modes of operation
are identified with a special condition annotation to
show the mode of operation.
Measurement Conditions
All measurements are made as follows, unless otherwise noted by SPECIAL CONDITIONS
on each diagram pullout page:
1. Between the point under test and instrument common.
2. With the 213 controls set as shown in 213 CONTROL SETTINGS.
3. With the 213 operating on batteries only.
4. The test oscilloscope is internally triggered and ac coupled unless otherwise indi-
cated by a reference voltage shown on the waveform pattern.
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