Tektronix 321 Series Calibration Procedure

C A L I B R A T I O N
Quick check for long ends, unsoldered joints, wire dress, etc.
and trimmers to mid-range.
1. CHECK POWER SUPPLY RESISTANCES TO GROUND
Primary of Power Transformer - - Infinite
10 Volts. Regulated to Converter - - Infinite
The following readings taken with Com. Lead of Ohmmeter on ground:
*NOTE: These readings will vary depending on range used.
possible range.
1A. CHECK RESISTANCE ACROSS BATTERY TERMINALS
With common lead of ohmmeter on Neg. terminal read 300 Q, reverse leads
and read infinite.
2. CHECK VOLTAGES AND REGULATION
Adjust 10 Volts regulated , (Check D.C. regulation.) 105-125.
voltages from converter.
+45
+45 Dec.
+10
+6.3
+6.3 Dec.
-1 0
-10 Dec.
-45
-7 2 0
January i 960
TYPE 321 OSCILLOSCOPE
F A C T O R Y
P R O C E D U R E
Check front panel controls for position and operation.
+45
+45 Dec.
+10
+6.3
+6.3 Dec.
-10
-10 Dec.
-45
-7 2 0
Power switch off.
TYPICAL MEASUREMENTS
45.5
47
9.5
6.3
6.3
-1 0
-1 1
-44
-7 2 0
Preset all pots
200
Q
600
Q
80 Q
8
Q
8
Q
1000
Q
1400 Q
4000 Q
5 Meg Q
Use lowest
Measure
Ripple
5 mv
2 mv
3 mv
150 mv
100 mv
3 mv
2 mv
5 mv
750 mv
321-1