Tektronix 184, Instruction Manual

Page: 23 / 95

Type
184
SECTION 5
PERfORMANCE CHECK
Introduction
This performance check procedure is provided to check
the operation of the Type 1 84 without removing the cover.
This procedure may be used for incoming inspection, instru­
ment familiarization, reliabi lity testing, ca libration verifica­
tion, etc.
Failure to meet the characteristics given in this procedure
indicates that the instrument requires internal checks and/or
adjustments. See the Calibration section.
Recommended Equipment
The following equipment is recommended for a complete
performance check. Specifications given are the minimum
necessary to perform this procedure. All equipment is
assumed to be ca librated and operating within the orignal
specifications. If equipment is substituted, it must meet or
exceed the specifications of the recommended equipment.
For the most accurate and convenient performance check,
special calibration fixtures are used in this procedure. These
fixtures are available from Tektronix, Inc. Order by part
number through your local Tektronix Field Office or repre­
sentative.
1 . Test oscilloscope. Bandpass dc to 30 MHz; 0.05 volts/
div deflection factor. Tektronix 540-Series osci lloscope with
Type L Plug-In Preampl ifier recommended.
2. 1
X
probe with BNC connector. Tektronix P6028 Probe
recommended.
3.
lOX
probe with BNC connector. Tektronix P6006 Probe
recommended.
4. Test oscilloscope with sampling system. Input im­
pedance 50
n,
risetime, 0.4 ns maximum. Tektronix 560-
Series with Types 3S76 and 3T77 or Tektronix 540-Series
with Type 1 Sl Plug-In Unit recommended.
5. Electronic Digital Freq uency Counter. Frequency mea­
surement dc to 20 MHz. Example: Hewlett Packard 5244L
Electronic Counter or equivalent.
6. Termination (one). Impedance 50
n;
BNC connectors,
Tektronix Part No. 01 1 -0049-00.
7. 5X attenuator. Impedance 50
n;
GR connectors. Tek­
tronix Part No. 01 7-0079-00.
8. Adapters, GR to BNC, female. Tektronix Part No. 01 7-
0063-00.
9. Adapter, clip lead to BNC. Tektronix Part No. 01 3-
0076-00.
1 0. Adapter, BNC to dual binding post. Tektronix Part
No. 1 03-0035-00.
1 1 . Cable (two). Impedance 50
n;
type RG58/ AU, length
42 inches, BNC connectors. Tektronix Part No. 01 2-0057-00.
1 2. Resistor. 1
kn, 1/2
watt, 1 % tolerance.
®
General Information
In the fol lowing procedure, test equipment connections or
control settings should not be changed except when noted.
If only a partial check is desired, refer to the preceding
step(s) for setup information.
The following procedure uses the recommended equipment.
If substitute equipment is used, the user m ust determine the
settings or setup to meet the requirements of the check.
Preliminary Procedure
1 . Check fuses for correct value. 1 1 5 volt operation: 0.6
amp, slow blow, 3AG. 230 volt operation: 0.3 amp, slow
blow, 3AG. Check Line Voltage switch on the back panel
for correct operating position (1 1 5 or 230 V).
2. Connect the Type 1 84 to a line voltage within the
regulating range of the power supplies. Allow a minimum
of 2 hours after the Type 1 84 is connected to a power
source for the crystal to stabilize at 25°C ±5° or room
ambient temperature. Turn the Type 1 84 on by depressing
any of the MARKER SELECTOR push buttons. Allow 5 minutes
warm-up time, if the crystal oven has stabilized, before
checking the instrument to a given accuracy.
PERFORMANCE CHECK
1 . Check Oven light
Requirement-Oven light should cycle on and off after
approximately 5 minutes warm-up time.
Check-Oven light operation.
2.
Check Crystal Oscillator Frequency
a. Requirement-Frequency 1 0 MHz ± 1 00 Hz at ambient
room temperature. Crystal oven stabil ized. (Two hours
warm-up time after power is appl ied before crystal oven is
stabilized.)
b. Apply the .1 p.S marker from the MARKER OUTPUT
connector through a 50
n
coaxial cable and 50
n
termina­
tion resistor to the Input connector of a digita l frequency
counter or equivalent frequency measuring device.
c. Check accuracy of the .1 p.S markers (1 0 MHz crystal
osci llator frequency).
d. Remove the coaxial cable and 50
n
termination from
the freq uency measuring device.
3.
Check
.1
""S to
5
""S Marker Timing
a. Requirement-Marker accuracy dependent on crystal
osci llator.
b. Connect the TRIGGER OUTPUT of the Type 1 84 through
a 50
n
coaxial cable to the external Trigger Input connector
of the test osci lloscope (Type 545B).
5-1