Safran SecureSync 2400 User Manual page 254

3.3 Managing References
1. Navigate to
2. Click on the GEAR button next to the GNSS Reference. The
3. Locate the
4. Click Submit.
Calculating cable delay
The following formula can be used to calculate antenna cable delay:
D
Where:
D = Cable delay in nanoseconds
L = Cable length in feet
C = Constant derived from velocity of light: 1.016
V = Nominal velocity of propagation expressed as decimal, i.e. %66 = 0.66 Value is
provided by cable manufacturer.
When using Safran LMR-400 or equivalent coaxial cable, this formula equates to
approximately 1.2 nanoseconds of delay per every foot of cable. To calculate the
Offset value (cable delay), multiply the length of the entire cable run by "1.2" and
then enter this value into the Offset field.
E x a m p l e s
c a b l e
100 feet of cable = 120 nanoseconds of cable delay
200 feet of cable = 240 nanoseconds of cable delay
300 feet of cable = 360 nanoseconds of cable delay
238
Interfaces > References: GNSS Reference
dow will open:
Offset field, and enter the desired value.
= ( L * C ) / V
o f L M R - 4 0 0
d e l a y s :
( o r e q u i v a l e n t )
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3 SecureSync 2400 User Manual Rev. 5.2
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