Technical Description

0310-EX-CN-2016 Text Documents

Liquid Robotics Inc.

2016-12-20ELS_185767

Why an Experimental License is Necessary:
The purpose of this application is to support temporary integration testing in preparation of a
government/DoD sponsored exercises and demonstrations.

Operation Description:
The system receives the GPS signals from a roof top antenna and re-transmits the signals inside the
facility to allow production and flight test personnel to perform installation, testing and troubleshooting
of GPS receive systems.

Technical Description
This technical description shows compliance with all NTIA items in Chapter 8.3.28.

1. Individual authorization is for indoor use only, and is required for each device at a specific site.
Operation will be conducted indoors. The device information is provided in application and specific
site information provided below.

2. Applications for frequency assignment should be applied for as an XT station class with a note
indicating the device is to be used as an "Experimental RNSS Test Equipment for the purpose of
testing GPS receivers" and describing how the device will be used. Description of operation provided
in technical description and Liquid Robotics Inc. concurs to the XT station class.

3. Approved applications for frequency assignment will be entered in the GMF. Liquid Robotics Inc.
concurs.

4. The maximum length of the assignment will be two years, with possible renewal. Liquid Robotics Inc.
concurs.

5. The area of potential interference to GPS reception (e.g., military or contractor facility) has to be
under the control of the user. The site is under Liquid Robotics Inc. ’s control.

6. The maximum equivalent isotropically radiated power (EIRP) must be such that the calculated
emissions are no greater than -140 dBm/24 MHz as received by an isotropic antenna at a distance of
100 feet (30 meters) from the building where the test is being conducted. The calculations showing
compliance with this requirement must be provided with the application for frequency assignment and
should be based on free space propagation with no allowance for additional attenuation (e.g., building
attenuation.) Link budgets provided below and meet specified levels. Calculations do not allow for
building attenuation.

7. GPS users in the area of potential interference to GPS reception must be notified that GPS
information may be impacted for periods of time. GPS users in area will be notified.

8. The use is limited to activity for the purpose of testing RNSS equipment/systems. Use will be
limited to testing RNSS equipment.

9. A "Stop Buzzer" point of contact for the authorized device must be identified and available at all
times during GPS re-radiation operation of the device under any condition. Stop Buzzer information
provided below.

Technical Description
System: GPS Source GPSRKL12

Frequency: L1 1575.42 MHz Emission: 24M0G1D
Effective Radiate Power: Maximum -76.88 dBm or 20.51162 Pico watts

Frequency: L2 1227.60 MHz Emission: 24M0G1D
Effective Radiate Power: Maximum -79.68 dBm or 10.7646 Pico watts

L1 Link Budget - L1 (1575.4 MHz)
Link Budget Parameter Value Units Comment
Receive Power on Earth -130.00 dBm
Rx Antenna Gain 32.00 dB Antcom G5Ant-2AT1
Cable Loss -1.30 dB
Lightning Protector -1.00 dB Estimate
Connector Loss -4.00 dB
Amplifier Gain 30.00 dB GPS Source A11-M-V-P110/5-NF-NM
Cable Loss -1.58 dB
Connector Loss -4.00 dB
Tx Antenna Gain 3.00 dB GPS Source L1/L2-2GP
Free Space Loss -68.74 dB 136 Ft.
EIRP @ 100 FT -145.62 dBm EIRP @ 100 FT from Building ( < -140 dBm)
Output PWR at -76.88 dBm 0.0205 Nano-Watts or 20.51162 Pico-Watts
Antenna

L2 Link Budget – L2 (1227.6 MHz)
Link Budget Parameter Value Unit Comment
Receive Power on Earth -136.00 dBm ~ 6 dB less than L1
Rx Antenna Gain 35.00 dB Antcom G5Ant-2AT1
Cable Loss -1.30 dB
Lightning Protector -1.00 dB Estimate
Connector Loss -4.00 dB
Amplifier Gain 30.00 dB GPS Source A11-M-V-P110/5-NF-NM
Cable loss -1.38 dB
Connector Loss -4.00 dB
Tx Antenna Gain 3.00 dB GPS Source L1/L2-2GP Antenna
Free Space Loss -66.57 dB 136 Ft.
EIRP @ 100 FT -146.25 dB EIRP @ 100 FT from Building ( < -140 dBm)
Output PWR at -79.68 dBm 0.01076 Nano-Watts or 10.7646 Pico-Watts
Antenna

Table (2) lists the locations/areas of operations, as well as the station class of the
operation.

City State Latitude Longitude Radius Station Type
(KM)

Sunnyvale CA 37-24-38N 122-00-15W 1 Fixed

Table 2 – Location Data

Operation Period:

This testing will occur over a two year period beginning in February 2017.

Stop Buzzer POC:

The “Stop Buzzer” point of contact is:
John Brennan
Office: 408-636-4273

Document Created: 2016-12-20 09:58:14
Document Modified: 2016-12-20 09:58:14

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