User's Manual

Document Name: MBS Leopard Transmitter Usert NOC Operating Manual
Version No: 1.5
Company Name: NextNav, LLC.
Confidential Page 13 9/17/2014
Page 13 of 13
levels between 2 MHz, 5 MHz and IDB modes are compensated using internal RF
attenuation that can be set remotely by NOSS engineers to ensure that 30 Watts ERP is
met in both cases.
3 Technical Specifications
Parameter
Value/Description
Modulation
BPSK modulation with CDMA spreading
Maximum ON time
200ms/1second
Duration of a single burst
100ms
Center Frequencies
From 920.773 to 926.227 MHz for 2 MHz
signal
From 922.308 to 924.692 MHz for 5 MHz
signal
IDB modes are combination of 2 and 5 MHz
signals transmitted in different time frames
(1sec apart)
Necessary Signal Bandwidth
2.046MHz for single band,
5.115MHz for IDB band Type A & B
Frequency Stability
<10ppb
EIRP
30W ERP `
Data Rate
99 bits in a 100ms slot
Power Supply
Nominal: 110 VAC (primary means)
48 VDC (secondary means – battery backup)
Power Consumption
330 W max, 140 W average, 7.5A
Operating Conditions
-40°C to +50°C, plus solar radiation
0 to 95% humidity, non-condensing
Remote Monitoring
Via SNMP protocol
Environmental Standard
IP66