Tektronix TYPE R Use and care manual

NOTE REGARDING FACTORY CALIBRATION PROCEDURES
AND TEST SPECIFICATIONS
Factory Calibration Proce ures an Test Specifications are
inten e for use at the factory as a general gui e for calibrators
an quality control men. Most of the tolerances liste in these
sheets are closer than a vertise specifications. This is one pur
posely in or er to insure that the instrument will meet or excee
a vertise specifications when it reaches the customer.
These calibration proce ures an test specifications shoul
be use , therefore, as a gui e only.
Some of the test equipment referre to in the calibration
proce ures is not available commercially; the Tektronix fiel engi
neer will be gla to suggest alternate approaches.
1/16/61
C/S Copy

TYPE R PLUG-IN UNIT
FACTORY CALIBRATION PROCEDURE
The following inst uments and equipment a e needled:
1 TYPE 5>iiO-Se ies Oscilloscope
1 Test Scope (calib ated ve tical)
1 Special Scope Input Adapte
1 $22 TERMINATING RESISTOR (B$2-R)
1 $2-2 cable
1 $-2 Test Load
1 2$-2 Test Load
1 Flexible plug-in extension
1 Sho t plug-in extension
1 G ounded Emitte T ansisto Boa d
The 5^0-Se ies oscilloscope should be set up as follows unless othe wise stated:
HORIZONTAL DISPLAY
TRIGGERING MODE
TRIGGER SLOPE
STABILITY
TIME/CM
MULTIPLIER
TYPE 107
INTERNAL SWEEP (Type 5'Ul)
MAIN SWEEP NORMAL (Type $k$)
AC SLOW
-INT
full ight (cw)
1 pSEC
1
Use a $2-2 cable, te minated with a
TERMINATING RESISTOR (B$2-R)
The "Ve tical-System Elect ical Cente " of the 5^0-oe ies oscilloscope should,
be dete mined in the following manne :
Using a TEST LOAD UNIT, dep ess the PRESS TO SHORT INPUT button and
obse ve the ve tical level of the t ace. If you use a Type $3/^1’
Plug-in unit, jumpe between pins 1 and 3 on the 16-pin connecto
and obse ve the ve tical level of the t ace. This level will be
efe ed to late in the calib ation p ocedu e.
Janua y, 1959 R-l

PRECHECK
Make a careful visual inspection of the unit for proper wire ress an
check controls for smooth mechanical operations. Make the following
resistance to groun ohecks on the amphenol 16-pin connector*
AMPHENOL CONNECTOR
PIN NUMBER RESISTANCE TO GROUND IN Q
1
2
5
k
5
9 K
0
9 K
Infinite
ft
6
ft
7
tt
8
It
9
10
11
12
13
5 K
1.9 K
6.5 K
Infinite
tt
Ik
ft
15
16 75 a
Infinite
Bri ge out the resistors on the SERIES RESISTOR switch an the COLLECTOR
CURRENT MA/CM switch to insure that they are within ±2$ of their rate
values.
PRESET CONTROLS
COLLECTOR SOURCE VOLTS NPN+,
COLLECTOR CURRENT MA/CM .5 (200 q)
POSITION mi -range
PULSE VOLTS + . 10
PULSE VOLTS VARIABLE full right (cw)
TRIGGER SINGLE
BIAS VOLTS 0, XI
SERIES RESISTOR 50
GAIN ADJ. R5885 mi -range
PULSE VOLTS ADJ. R6859 full right (cw)
January, 1959 R-2

POSITION RANGE ADJ. R5870 mi -range
LR5804 slug above win ing
LR5812 slug above win ing
HP PEAKING mi -scale
Plug R unit into the oscilloscope through flexible plug-in extension an
quickly check the transistorize supplies. (Typical rea ings)
Check points Knobs at preset location
unless otherwise speoifie
Collector of V6837
to groun COLLECTOR SOURCE VOLTS
full left (ccw) full right (ow)
-22 v -8.8 v
Floating chassis to
collector of V6857 PULSE VOLTS VARIABLE
full left (ocw) full right (cw)
-4.2 v -10.8 v
Floating chassis to
collector of V6877 -10.4 v
1. CHECK DC OUTPUT LEVEL
Measure between, pin 1 an groun , then between pin 3 an groun of the
16-pin amphenol plug (65-70 v).
2. CHECK MICROPHONICS
Rap lightly with the palm of the han on top of the plug-in to check
microphonics.
3. ADJUST POSITION RANGE ADJ. (R5807)
With the front panel POSITION control centere , a just R5807 to
position the trace on the "Vertical-System Electrical Center".
4. SET GAIN ADJUST (R5885)
Connect 200 mv of CALIBRATOR signal to SCOPE INPUT. Depress PUSH TO
CONNECT SCOPE INPUT TO THIS TERMINAL an a just R5885 for 2 cm of
vertical eflection.
5. CHECK COLLECTOR SOURCE VOLTS FOR TRACKING
Connect voltmeter from C_ to groun an check COLLECTOR SOURCE VOLTS
control for tracking with front panel in ication from 1_ to 1£ volts
on both -PNP an +NPN.
6. SET PULSE VOLTS ADJ. (R6859)
Connect vertically-calibrate test scope to JB an observe amplitu e
of pulses generate by the mercury pulser. A just R6859 for 10 volts
of signal output. Notes BIAS VOLTS must be set for 0 volts across
C5802 to insure accuracy of this a justment.
R-3
Janua y, 195>9

7. CHECK PULSE VOLTS SWITCH STEPS
Switch PULSE VOLTS switch to 5 and check fo 5 volts of signal
amplitude. Check each step of this switch fo indicated output
within ±2$. Check VARIABLE PULSE VOLTS cont ol to be smooth in
ope ation and. tvpve a ange f om 1 to 2,5! times attenuation,
8. CHECK USAS VOLTS
Connect mete ac oss C58Q2 and position BIAS VOLTS cont ol to obtain
0 volts eading. Index knob to 0 and tighten set sc ew. Check con
t ol fo t acking with f ont panel indication th oughout its ange,
on both XI and X10,
9. CHECK REGULATION OF ALL POWER SUPPLIES
Set BIAS VOLTS at 0 an XI, Attach test probe an voltmeter to the
output of the bias power supply. Connect the 5-8 test loa across
C5>802. Turn BIAS VOLTS slowly to the right (cw) an observe the volt
age at which the power supply goes out of regulation (typically 3»3 v).
Turn VOLTS VARIABLE full left (ccw). Attach test probe to the
output of the floating power supply. Connect the voltmeter an the
5-8 test loa across C5801. Turn PULSE VOLTS VARIABLE slowly to the
right (cw) an observe the v oltage at which the power supply goes out
of regulation (typically ij. v ) ,
Turn COLLECTOR SOURCE VOLTS full left (ccw). Attach test p obe and
mete to the output of the collecto powe supply. Connect 5 and 25-8
test loads in se ies ac oss C68U7. Tu n COLLECTOR SOURCE VOLTS slowly
to the ight (cw) and check to see that powe supply voltage emains the
same and stays in egulation as COLLECTOR SOURCE VOLTS is va ied
th oughout its ange with load and without load,
10. ADJUST HF PEAKING (R6808)
Install TYPE R unit in plug-in compa tment. Tu n TRIGGER SLOPE to
+INT. Apply squa e wave f om 107 to SCOPE INPUT th ough special
scope input adapte . Dep ess PUSH TO CONNECT SCOPE INPUT TO THIS
TERMINAL. With TIME/CM at 1 pSEC X2, obtain a stable display th ough
adjustment of TRIGGER LEVEL and STABILITY cont ols. Obtain app oxi
mately 3 cm of ve tical deflection and adjust R6808 fo optimum
leading edge.
11. ADJUST PULSER HF COMPENSATIONS (L$80)4 an L5812)
Remove TYPE R plug-in f om plug-in box and inse t sho t extension.
Re-install plug-in. Connect ^TRIGGER cable to TRIGGER IN and tu n
TRIGGER SLOPE to +EXT. Tu n COLLECTOR SOURCE VOLTS to PNP. Tu n
PULSE VOLTS to - , T v o l t s and CALIBRATED. Tu n BIAS VOLTS full
ight TcwF*and IloT Tu n COLLECTOR CURRENT MA/CM to .5 and SERIES
RESISTOR to 50. Tu n TIME7cFTto 7 1 pSEC/CM and STABILITY full ight
Tcw7. Install g ounded emitte t ansisto boa d using 2iJjpldi t ansisto
on the f ont of the R unit. Tu n BIAS VOLTS slowly to the left (ccw)
until app oximately 3 cm of ve tical deflection a e obtained. Adjust
STABILITY and TRIGGER LEVEL to obtain a stable display. Then adjust
158011 and L5812 fo optimum squa e-wave p esentation.
January, \9%9 R-U

12. CHECK VERTICAL RISETIME
Remove plug-in extension. Re-install plug-in unit. Remove
g ounded emitte t ansisto boa d and junipe B to C. Connect
+TRIGGER cable to TRIGGER IN and t igge as above. Tu n PULSE
VOLT'S switch and VARIABLE PULSE VOLTS to obtain 2.5 cm of
ve tical deflection. Position this signal ove lapping the two
cente ho izontal g aticule lines. Tu n TIME/CM switch to
.1 M-SEC X5. Measu e the distance between whe e the wavefo m
inte sects these g aticule lines and conve t to mpsec. This
checks the isetime of the enti e system; i.e., pulse , R unit
ve tical amplifie and the 5itO-Se ies oscilloscope, (App oxi
mately 12 mpsec) Note: Fo accu ate isetime measu ements,
check timing on the po tion of the sweep used fo these
measu ements with 50 me sine waves f om an accu ate sou ce.
13. CHECK SINGLE AND DOUBLE TRIGGER
Switch TRIGGER to double and obse ve both leading and falling
po tions of the pulse wavefo m. Note: It may be necessa y to
slightly eadjust STABILITY and TRIGGERING LEVEL cont ols to
obtain double t igge ing.
R-5
Janua y, I959