8250A Optical Power Meter Operation Manual
4.4 Measured Data Output Format
4-9
2. Mantissa and Exponent
Unit display
Range
Mantissa
Number of
characters
Exponent
Number of
characters
W
20 nW
dd.dddd
8
E-09
4
200 nW
ddd.ddd
E-09
2000 nW
dddd.dd
E-09
20
W
dd.dddd
E-06
200
W
ddd.ddd
E-06
2000
W
dddd.dd
E-06
20 mW
dd.dddd
E-03
200 mW
ddd.ddd
E-03
RATIO(W)
00d.ddd
E
00 to 09
dBm(dBr)
2,000 counts or more when W is
displayed.
ddd.ddd
E-00
Between 500 and 1,999 counts
when W is displayed.
0ddd.dd
E-00
Between 50 and 499 counts when
W is displayed.
00ddd.d
E-00
Less than 50 counts when W is
displayed.
000ddd.
E-00