Symmetricom 58503B, Руководство по началу работы

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Chapter 2 Features and Functions
Inputs
Getting Started Guide 2-5
• Less than 53 meters), no line amplifier is necessary.
• More than 53 meters and less than 105 meters, you need 1 line
amplifier.
• More than 105 meters and less than 158 meters, you need 2 line
amplifiers.
• More than 158 meters, contact sales for assistance.
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
µ
s/meter). Given these delay values per foot you can calculate the
delay for your cable length.
Tables 2-1 and 2-2 list the delay values that you need to use with the
:GPS:REFERENCE:ADELAY <seconds>
command for the available
cable assemblies.
Table 2-1. Delay Values for the 58518A/519A and 58518AA/519AA
RG-213 Antenna Cables
The nominal delay value is labeled on the cables. Refer to the
Designing Your GPS Antenna System Configuration Guide for more
information.
Cable Option Length RG 213 or Belden 8267
Antenna Delay
Value
001 1m 5.0 nanoseconds
002 2 m 10.3 nanoseconds
005 5 m 25.2 nanoseconds
010 10 m 50.5 nanoseconds
015 15 m 75.7 nanoseconds
030 30 m 151.5 nanoseconds
050 50 m 252.5 nanoseconds