Performance: Correct - Tektronix 7B51 Instruction Manual

Performance Check/Calibration-Type 7B51
Requirement: Accurate within 1 minor division at each
major dial division between 1.00 and 9.00.
Performance: Correct
; Incorrect
21. Check Delay Time Accuracy Page 5-13
Requirement: The delay time accuracy over the center
eight divisions is within 1% between 1 ).ls/Div and .5 s/Div;
within 2% between 1 s/Div and 5 s/Div.
Performance: Correct
discrepancies)
22. Check Delay Time Jitter
; Incorrect
(list any
Page 5-13
Requirement: Jitter does not exceed 1 part in 50,000 of
10 times the TIME/DIV setting.
Performance: Correct ; Incorrect
23. Check Line Trigger Source Page 5-14
Requirement: Stable triggering of the proper polarity
with the LEVEL/SLOPE control at 0/+ and 0/-.
Performance: Correct ; Incorrect
PERFORMANCE CHECK/CALIBRATION
PROCEDURE
General
The following procedure is arranged so the Type 7B51
can be calibrated with the least interaction of adjustments
and reconnection of equipment. A picture of the test equip-
ment required for each group of steps is given to aid in
identification of the necessary equipment. The control
settings continue from the preceding step(s) unless noted
otherwise.
The following procedure uses the equipment listed under
Test Equipment Required. If other equipment is substi-
tuted, control settings or calibration setup may need to be
altered to meet the requirements of the equipment used.
Detailed operating instructions for the test equipment are
not given in this procedure. Refer to the instruction manual
for the test equipment if more information is required.
NOTE
This instrument should be calibrated to an ambient
temperature of +2fJ
C
± 10°
C
for best overall
accuracy.
If
the temperature is outside the given
range, see Section 1 for the applicable tolerances.
5-4
Preliminary Control Settings
Test Time-Base
(A horizontal plug-in compartment)
Level/Slope 0/+
Triggering
Mode
Coupling
Source
Position
Magnifier
B Delay Mode
Time/div
Variable
Type 7B51
P-P Auto
AC
Int
Midrange
Xl
Independent
.1 ms
Cal In
(B horizontal plug-in compartment)
LEVEL/SLOPE 0/+
TRIGGERING
MODE
COUPLING
SOURCE
POSITION
MAGNIFIER
B DELAY MODE
TIME/DIV
VARIABLE
AC-GND-DC
Volts/div
Position
Polarity
Type 7A16
NORM
AC
EXT
MIDRANGE
Xl
INDEPENDENT
20 ).ls
CAL IN
DC
.5V
Midrange
+
UP
Type 7504 Indicator Oscilloscope
A Intensity
B Intensity
Vertical Mode
Horizontal Mode
A Trigger Source
B Trigger Source
CCW
CCW
Left
A
Left Vert
Left Vert
Turn the indicator oscilloscope power on and advance
the A I ntensity until a free-running trace is observed.
Center the trace on the CRT with the horizontal and verti-
cal POSITION controls and allow several minutes warmup
before proceeding with calibration.
CALIBRATION PROCEDURE
1. Check/Adjust Level Center (R385)
a. Test equipment required is shown in Fig. 5-1.
b. Connect a BNC
"Tn
connector to the output of the
low-frequency sine-wave generator. Using two 50
st
BNC