Equipment Required - Tektronix 1S1 Instruction Manual

Maintenance – Type 1S1
General Information
A complete calibration and verification procedure for
the Type 1S1 is provided in this section. This procedure
checks the instrument to the performance characteristics
given in Section 1. A calibration outline is included at
the beginning of the procedure for use as a guide for
quick calibration by an experienced calibrator, or as a
checklist to verify correct calibration and operation of the
Type 1S1.
The Type 1S1 should be checked and recalibrated after
each 500 hours of operation, and at least once every 6
months, to insure that it is operating properly and accurate-
ly. In addition, portions of the instrument will require re-
calibration if components have been replaced or other elec-
trical repairs have been made in the circuitry.
The step-by-step instructions in the calibration procedure
furnish an orderly approach to the isolation of possible
malfunctions, and thus serve as an aid in troubleshboting
and repairing the instrument. Any maintenance that is known
to be needed should
the calibration procedure. If any troubles become appar-
ent during calibration, these should also be corrected be-
fore proceeding. Repair and servicing information is given
in Section 4 of this manual.
Specialized calibration equipment is used wherever ap-
plicable to provide the quickest and most accurate calibra-
tion. If this equipment is,not available, substitute equip-
ment must equal or exceed the requirements listed below
under "Equipment Required." If the equipment does not
meet these requirements, the Type 1S1 may not be calibrat-
ed to the given accuracy. In such a case, the difference
between the specified equipment accuracy and the accu-
racy of the equipment used must be added to the toler-
ance stated in the calibration step.

EQUIPMENT REQUIRED

The following (or equivalent) items of equipment are
required for a complete calibration of the Type 1S1. The
equipment is illustrated in Figs. 5-1 and 5-2.
1. Calibrated indicator oscilloscope, Tektronix Type 545B.
Alternate equipment requirements: Compatible with Tek-
tronix 1-series plug-in units; external horizontal input with
deflection factor adjustable to 1 volt/cm; amplitude cali-
brator output waveform (approximately 1 kc); 6-cm by 10-
cm crt screen desirable.
2. Calibrated test oscilloscope, Tektronix Type 545B with
Type W Differential Comparator Plug-In Unit. Minimum
alternate requirements: Bandpass from dc to 15Mc; sweep
rates from 10msec/cm to 0.2µsec/cm; vertical input de-
flection factors from 500mv/cm to 1mv/cm; voltage and
timing accuracy of display within 3%; internal comparison
voltage with Vc accuracy within 0.5%; ac and dc vertical
input coupling; internal and external triggering capability.
A single vertical input channel is used.
be performed before starting
3. Time-mark generator, Tektronix Type 180A. Minimum
alternate requirements: Marker outputs from 1 µsec to 50
µsec; sine-wave outputs of 5Mc, 10Mc and 50Mc; fre-
quency accuracy within 0.25%; marker and sine-wave am-
plitudes at least 400mv into 50 ohms.
4. Pretrigger pulse generator, Tektronix Type 111. Mini-
mum alternate requirements: Output pulse risetime less
than 1 nsec; output pulse amplitude at least 2 volts into
50 ohms; output pulse duration 2nsec and 9nsec (with
charge line); pretrigger pulse amplitude at least 100mv
into 50 ohms; pretrigger to output pulse time delay vari-
able from 30nsec to 250nsec; repetition rate variable from
10cps to 100kc.
5. Tunnel diode pulse generator, Tektronix 067-0513-00.
Minimum alternate requirements: Pulse risetime 30psec or
less; pulse amplitude at least 400mv into 50 ohms; pulse
duration approximately 40nsec; repetition rate approxi-
mately 70 kc.
6. 50 Amplitude calibrator, Tektronix 067-0508-00. Mini-
mum alternate requirements: Output amplitude from 12 mv
to 2.0 volts into 50 ohms; amplitude accuracy within 0.5%;
output frequency approximately 20kc.
7. Square-wave generator, Tektronix Type 105. Minimum
alternate requirements: Output frequency adjustable to
150kc; risetime approximately 20nsec; aberrations after rise
less than 1%; output amplitude adjustable to 1 volt into
50 ohms, using attenuators if necessary.
8. 1-Gc sine-wave generator (e.g. General Radio Type
1218-A Oscillator with Type 1201-B or Type 1203-B Power
Supply). Minimum requirements: Output frequency 1 Gc;
frequency accuracy within 1% at 1 Gc; peak-to-peak out-
put amplitude at least 800mv into 50ohms,
9. 100-kc Audio generator (e.g. Heathkit Model IG-72).
Minimum requirements: Output frequency 100kc; peak-to-
peak output amplitude at least 300mv into 50 ohms.
10. Variable autotransformer (e.g. General Radio, Variac
Type W10MT3W). Required only for checking voltage reg-
ulation. Minimum requirements: Output voltage variable
over regulation range of indicator oscilloscope (e.g. 105
volts to 125 volts ac rms for nominal 117-volt operation);
output power rating at least 0.6kva. If autotransformer
does not include ac voltmeter for monitoring output volt-
age, separate ac voltmeter is required. Accuracy of meter
must be within 3% over the required range.
11. Resistance bridge (e.g. Electro-Scientific Industries 250-
DA Impedance Bridge). Required only for checking input dc
resistance. Accuracy within at least 0.5% at 49 ohms.
12. 10X Attenuator probe for test oscilloscope, Tektronix
P6006. Tektronix part number 010-0127-00 (BNC connector).
13. 1X probe for test oscilloscope, Tektronix P6028. Re-
quired for measuring dc voltages and power supply ripple.
5-1