Tektronix 7B15 Instruction Manual page 71

Characteristic
Operating in HF SYNC
MODE
AC, AC LF REJ,
or DC
External Trigger Input
LEVEL Range
Maximum Safe
Input
1-Megohm
Input
50-Ohm Input
Input R and C
1-Megohm
Input
50-Ohm
Input
Trigger Holdoff Time
Minimum Holdoff
Setting
0.2 s/div to 50
ms/div
20 ms/div to
2 ps/div
1 ps/div to 2 ns/div
Maximum Holdoff
Setting
0.2 s/div to 50
ms/div
20 ms/div to 2
ps/div
1 ps/div to 0.5
ps/div
0.2 ps/div to 2
ns/div
REV JUN 1981
Performance Requirement
250 MHz to 1 GHz - 0.3 div Internal
75 mV External
At least + and -3 .5 V (checked with
1 kHz sine wave).
250 V (dc plus peak ac).
1 Watt average .
1 Mfg within 5%, 20 pf within 10%.
50 0 within 2% .
40 ms .
2 times TIME/DIV setting .
2.0 ps .
400 ms .
20 .0 ps .
6.0 /is.
TABLE 5-1 (CONT.)
Performance Check Summary
20 times TIME/DIV setting.
Performance
Check Step
A5 . Check Internal
Triggering Sensitivity .
A4 . Check External
Triggering Sensitivity .
A3 . Check External
Level Range .
Specification applicable under fault conditions ;
therefore this is not a procedural check .
Customer verification normally not required .
Input resistance and capacitance can be
determined with appropriate testing bridge if
necessary.
A1 . Check External
Trigger Input Resist-
ance .
Customer verification normally not required .
Satisfactory operation is substantiated by
other tests in the procedures .
Calibration----7B15
Adjustment and
Performance Step
A3 . Adjust Sensi-
tivity (R147) .
A2 . Adjust External
Trigger Compensa-
tion C117 .
A5 . Check External
Level Range.
A1 . Check External
Trigger Input
Resistance .
5-5