Specifications

Operating Manual SEFRAM 4451
M4451 A00
68
The following tests are intended to verify that the SEFRAM 4451 operates properly and meets its
specifications. Perform the tests after a warm-up period of 30 minutes, at 25°C +
5°C ambient temperature.
These tests may be used for periodic inspection and after repair. If the instrument does not meet its
specification, please contact the SEFRAM service center.
Period Accuracy Test
SPECIFICATION - ± 0.01%.
PROCEDURE - Connect the instrument SYNC OUT to the
counter input, set to measure period.
CHECK - The period measured by the counter is within
specification.
Width Accuracy Test
SPECIFICATION - ±(0.5% of setting +500ps)
PROCEDURE - Connect the instrument OUTPUT to the
counter input. Select output levels of 2.5V
and -2.5V and set the counter to Width,
50Ω termination, + slope and Auto trigger
mode.
CHECK - The width measured by the counter is within
specification.
Delay Accuracy Test
SPECIFICATION - ±(0.5% of setting +500 ps)
PROCEDURE - Connect the instrument SYNC OUT to input A
of the counter and the OUTPUT to input B.
Set the counter to TIME A-B mode, 50Ω
termination, + slope and 0V trigger level.
Select delay times on the SEFRAM 4451.
CHECK - The delay time measured by the counter is
within specification.
Transition Times Accuracy Test
SPECIFICATION - ±5% of setting +2ns from 5ns to 100ms
PROCEDURE - Connect the instrument OUTPUT to the oscilloscope