Chapter 1 – Product Overview
Multi-Tech Systems, Inc. MultiModem rCell User Guide
17
GSM Antenna Requirements/Specifications
Frequency Range
824 – 960 MHz / 1710 – 1990 MHz
Impedance
50 Ohms
VSWR
VSWR shall not exceed 2.0:1 at any point across the bands of operation
Typical Radiated Gain
3 dBi on azimuth plane
Radiation
Omni-directional
Polarization
Vertical
Antenna Loss
Free space not to exceed -3db
TRP/TIS
Including cable loss the total radiated power (TRP) at the antenna shall be no less
than +22/24.5 dBm for 850/1900 MHz respectively, and the total isotropic
sensitivity (TIS) at the antenna shall be no less than -99/101.5 dBm for 850/1900
MHz respectively.
GPS (Global Positioning) RF Specifications
GPS L1
Frequency RX
1575.42
LNA Bias Voltage
5V
LNA Current Consumption
40mA Max
GPS Antenna Requirements/Specifications
Frequency
1575MHz
Impedance
50 Ohms
VSWR
1.5db
Input voltage
3.0V +/- 0.3V
GPS TIS
The total isotropic sensitivity (TIS) at the antenna shall be no less than
47 dBm
Global Positioning System (GPS)
Point the GPS toward the sky, as the GPS antenna needs to find the satellites that provide location information.
Technical Specifications
Receiver Type
L1 Frequency, GPS C/A code, SBAS Capable, 51 Channel Acquisitions,
14 Channel Tracking
Accuracy
Position 2.5m CEP, Velocity 0.1m/sec
Open Sky TTFF
Hot start 1 second, Cold start 29 seconds average, Reacquisition <1s
Sensitivity Tracking
-161dBm
Update Rate
1 Hz standard
Dynamics
4G
Operational Limits
Altitude <18,000m or Velocity < 515m/s
Datum
Default WGS-84
Interface
UART
Protocol
NMEA-0183, V3.01, GGA, GLL, GSA, GSV, RMC, VTG