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Test 2-8: Duty Cycle (cont’d)
Test Procedure
(cont’d)
4. Set the AFG frequency range as specified in Table 2-8:
FREQ:RANG MAX Enable doubling
or
FREQ:RANG MIN Disable doubling
5.
Set AFG output frequency:
FREQ <frequency> Set frequency
where <frequency> is the value specified in Table 2-8.
6. Initiate the waveform:
INIT:IMM
7.
Measure positive pulse width (average at least 10 periods) with the
Counter and record the reading in Table 2-11.
NOTE
If a percentage result is desired, measure the period (average at least 10
periods. Duty Cycle (%) = 100 x (Positive Pulse Width/Period)
Table 2-8. Duty Cycle Test Points
Frequency
(Hz)
Frequency
Range
Test Limits
(sec)
1.0 E3
2.0 E3
2.5 E5
5.0 E5
MIN
MAX
MIN
MAX
5.0E-3 ± 1.0E-6
2.5E-4 ± 3.0E-5
2.0E-7 ± 3.4E-9
1.0E-7 ± 1.5E-8
Agilent E1445A Service Manual Verification Tests 61