Symmetricom Z3801A, User Manual

Page: 35 / 98

Chapter 2 Features and Functions
Inputs
User Guide 2-5
Antenna Cable Length Delay
The RG 213 propagation delay is 1.54 nanoseconds per foot
(5.05 ns/meter). The LMR 400 propagation delay is 1.2 nanoseconds
per foot (3.93 µs/meter). Given these delay values per foot you can
calculate the delay for your cable length.
Tables 2-1A and 2-1B list the delay values that you need to use with
the
:GPSYSTEM:REFERENCE:ADELAY <seconds>
command for the
available the cable assemblies.
The nominal delay value is labeled on the cables. Refer to the
Designing Your GPS Antenna System Configuration Guide
(P/N 5964-9068E for more information.)
Table 2-1A. Delay Values for the 58518A/519A and 58518AA/519AA
RG-213 Antenna Cables
Cable Option Length RG 213 or Belden 8267
Antenna Delay Value
001 3.3 ft (1m) 5.0 nanoseconds
002 6.7 ft (2 m) 10.3 nanoseconds
005 16.4 ft (5 m) 25.2 nanoseconds
010 32.8 ft (10 m) 50.5 nanoseconds
015 49.2 ft (15 m) 75.7 nanoseconds
030 98.4 ft (30 m) 151.5 nanoseconds
050 164.0 ft (50 m) 252.5 nanoseconds