Installation Instructions
Document Name: WAPS BEACON Installation Manual
Version No: 1.4
Company Name: NextNav, LLC.
Confidential Page 19 11-Sep-12
Page 19 of 30
3.4 TX Antenna mounting
Omni antenna to be installed on tower or roof top construction as defined in site specific
construction drawing. As a general rule on any monopole installations the TX antenna shall be
attached to a 6 foot side arm mount, minimum distance away from the monopole unless the
antenna extends above the monopole in its entirety. Likewise the antenna shall be kept a
minimum distance of 6 feet from any other vertical structures on other types of towers. For roof
tip installations, the TX antenna must extend above all parapet walls and penthouses on the
roof top.
This radio transmitter may only operate using a vertically polarized antenna with maximum gain
of +8 dBi. To reduce potential radio interference to other users, the antenna gain should be so
chosen that the equivalent effective radiated power (ERP) does not exceed 30 Watts.
Antenna Type: Monopole
Polarization: Vertical
Maximum Gain: +8 dBi (maximum gain of antenna + cable loss is 3dBd)
A CSV file (configuration file) per transmitter is created by the NOC engineer, based on the
installation parameters such as line lengths, antenna type etc.
The TX output power level setting is contained in the CSV file.
The output power is adjusted by the “attenuation” setting. This value in the CSV file is
calculated by a formula to set the output power (not to exceed 30W EIRP). The variables used in
the calculation include PA Gain (Gpa), TX Antenna Gain (Gant), TX filter insertion loss (ILflt),
internal cable loss (ILint), external cable loss (ILext), and transceiver output power (PTCVR).
EIRP (W) = 10^((PTCVR •] ILint + Gpa •] ILflt •] ILext + Gant) / 10) / 1000
This radio transmitter (FCC ID: A4P-100-0007-01) has been approved by FCC to operate with
the antenna types listed below with the maximum permissible gain and required antenna
impedance for each antenna type indicated. Antenna types not included in this list, having a
gain greater than the maximum gain indicated for that type, are strictly prohibited for use with
this device.