Check Delay Time Accuracy; Delayed Sweep Display With Respect To; Left Vertical Compartment Of The Oscilloscope Mainframe; The Oscilloscope Mainframe - Tektronix 7B15 Instruction Manual

JU TM N N
ADJUSTMENT AND PERFORMANCE
CHECK INDEX
A. TRIGGERING SYSTEM
1 . Check External Trigger Input Resistance . . . 5-24
2. Adjust External Trigger
Compensation (C117) . . . . . . . . . . . . . . . . . . . . . . . . . 5-24
3. Adjust Trigger Sensitivity (13147) . . . . . . . . . . . 5-25
4. Check Triggering Modes . . . . . . . . . . . . . . . . . . . 5-25
5. Check External Level Range . . . . . . . . . . . . . . . 5-26
6. Check External Triggering Sensitivity . . . . . . . 5-26
7. Check Internal Triggering Sensitivity . . . . . . . 5-27
8. Check Internal Trigger Jitter . . . . . . . . . . . . . . . 5-28
9. Check Line Triggering . . . . . . . . . . . . . . . . . . . . . 5-28
B . HORIZONTAL SYSTEM
1 . Set Basic Sweep Calibration . . . . . . . . . . . . . ., 5-29
2. Check Sweep Length and
Positioning Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-30
3. Check/Adjust Magnifier Gain and
Registration (13460, 13470) . . . . . . . . . . . . . . . . . . . . 5-30
4. Check Variable Time/Division and
Variable Hold Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-31
5. Adjust Sweep Timing (C361, 13305
13310, 13480) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-31
6. Check Delay Modes . . . . . . . . . . . . . . . . . . . . . . . 5-32
7. Adjust Delay Offset and Delay
Gain (13555, 13510) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-32
8. Adjust DVM Zero (13625) . . . . . . . . . . . . . . . . . . 5-33
9 . Adjust DVM Gain (13620) . . . . . . . . . . . . . . . . . . 5-34
10 . Adjust Delay Start and Pickoff
Bias (13335, 13535) . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-34
11 . Check Delay Time, A Time, and Trace
Separation Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35
12 . Adjust 10 Ns and 10 ms Delay Timing
(13305, 8310) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35
13 . Check A Time Accuracy . . . . . . . . . . . . . . . . . . 5-36
14 . Check A Time Linearity . . . . . . . . . . . . . . ., . . 5-37
15 . Check Delay Time Accuracy (Start of
Delayed Sweep Display with Respect to
Delaying Sweep Display) . . . . . . . . . . . . . . . . . . . . . 5-38
16 . Check Delay Time Jitter . . . . . . . . . . . . . . . . . . 5-38
17 . Check Sweep Timing . . . . . . . . . . . . . . . . . . . . . 5-39
18 . Check Magnified Sweep Timing . . . . . . . . . . 5-40
PAGE
Calibration Part II-71315
Adjustment and Performance Check
MANCE CHECK
The following procedure (Part IkAdjustment and Performance Check) provides the information necessary to : (1) verify
that the instrument meets the electrical specifications . (2) verify that all controls function properly, and (3) perform all
internal adjustments.
Part I-Performance Check verifies electrical specifications without removing instrument covers or making internal
adjustments. All tolerances given are as specified in the Specification tables (section 1) in this manual .
A separate Operators Checkout Procedure is provided in the Operators Manual for familiarization with the instrument
and also to verify that all controls and connectors function properly .
ADJUSTMENT AND PERFORMANCE
CHECK POWER-UP SEQUENCE
NOTE
The performance of this instrument can be
checked at any ambient temperature within
the 0°C to +50°C range unless stated
otherwise . Adjustment between 20° and 30°
C ambient is required to maintain stated
accuracy.
1 . Install a high impedance amplifier plug-in unit in the
left vertical compartment of the oscilloscope mainframe .
2. Install the 71315 in the A horizontal compartment of
the oscilloscope mainframe.
3. Set the mainframe vertical mode switch to display the
left vertical unit and the horizontal mode switch to
display the A horizontal unit . Set the mainframe intensity
controls fully counterclockwise and set the trigger source
switches to vertical mode .
4. Turn on the mainframe and allow at least 20 minutes
warmup before beginning the procedure.