10. Move the cursor to within 100KHz of the R450 DC's receive
frequency.
11. Calculate VSWR using the new return loss value.
12. Record both values. They must be less than 1.5.1 for the antenna
and feed line to pass the test.
General Installation Guidelines
Unpacking
As with all precision electronic instruments, the RF 450 MHz antenna
should be handled with care; however, no additional special handling
is required.
After unpacking the RF 450 MHz antenna, inspect it for damage. If
any parts of the R450 MHz antenna appear to be damaged or prove to
be defective upon installation, notify your Neptune sales
representative. If the unit or item requires reshipment, use the original
cardboard box and packing material.
In particular, check to be sure that the N connector at the base of the
antenna is not damaged. This is much easier to check while the
antenna is on the ground than after it is installed.
RF Antenna Installation Kit
The RF 450 MHz antenna and the basic accessories are included with
the R450 DC. The mounting brackets that are included are designed to
mount on the top of a mast or similar structure. If the installation
requires offsetting the antenna from the supporting structure, this must
be ordered separately. Neptune does not sell it.
Figure 72 – RF 450 MHz Antenna
R450 Data Collector Installation and Maintenance Guide
97
Appendix A: RF Antenna Installation
Summary of Contents for R450
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