TB 9-6625-2084-35
Calibration
Time base
Test instrument adjustments
Pulse area
fixture REP
sweep rate
Tektronix, types 7613/R7613,
Tektronix type
affected
RATE switch
TIME/DIV or
SN B150000 and above,
7623 and 7613/R7613,
(ns)
76232A/R7623A and 7633/R7633
SN B149999 and
settings
DLY TIME
switch settings
0.5 s
100 kHz
R2509
---
500
0.1 s
1 MHz
R2511
---
120
C2511
---
5 ns1 (.05 s X10
R2411
---
30
1 MHz
MAG)
1 MHz
50 ns (.05)
---
C420
50
---
R421
---
20 ns1 2 3 (0.05 s
---
C425
20
1 MHz
---
R421
---
X10 MAG)
C2416
---
10
R2416
---
---
R2519
---
---
---
C427
5
---
R427
---
5 ns1 3 (.05 s
C2418
---
5
R2418
---
---
X10 MAG)
C2456
---
2
1For
models without ns switch positions, use corresponding fast sweep ranges.
2Adjust
C2469 (fig. 1A) for minimum overall aberrations (R).
3Adjust for best compromise.
NOTE
Adjustments listed in table 3 interact and may be necessary to
repeat various steps to obtain optimum response with
minimum aberrations.
(6) Remove calibration fixture from right vertical compartment and install in left
vertical compartment.
(7) Press VERT MODE LEFT pushbutton and TRIG SOURCE LEFT pushbutton
and repeat technique of (1) through (5) above for left vertical compartment.
b. Adjustments.
Adjust R2409 (fig. 1A) for Types 7613/R7613, SN
B150000 and
above, 7623A/R7623A and 7633/R7633. Adjust R455 and R465 (fig. 1B) for 7623 and
7613/R7613, SN B149999 and below for flat top and minimum aberrations (R).
10. Horizontal Gain and Linearity
a. Performance Check
(1) Install time base in left vertical compartment and calibration fixture in
horizontal compartment.
(2) Set calibration fixture TEST switch to VERT or HORIZ GAIN and REP RATE
100 kHz pushbutton pressed.
(3) Set time base TIME/DIV OR DLY TIME switch to 10 s.