Orbit OCEANTRX4-500 - Page 49

Pre-Installation Requirements Verify Tx/Rx Path Gain Budgets
OceanTRx
TM
4-500 Installation and Operations Manual 3-21
Figure 3-18: Calculations for Example of Dual OceanTRx4-500 L-Band Tx Path
Parameter Unit Value
System1 Type N/A OTRx4
System1 Band N/A Ku
System2 Type N/A OTRx4
System2 Band N/A Ku
POINT
G BUC Power Watts 16.0
G BUC Power (P1dB) dBm 42.0
BUC Gain (Nominal) dB 70.0
BUC Internal Attenuation dB 0.0
F Derived Input power to BUC for P1dB dBm -28.0
C to D, E to F Total Pedestal Attenuations: Cables (L-Band cables and Mux cable) + Rotary Joint dB -7.8
C Derived Input power to Pedestal for BUC P1dB (Mux) dBm -20.2
A Tx L Band Frequency from MODEM MHz 1200
C MUX Band - Tx Frequency (@ Multiplexed highest frequency) MHz 4500
Which LMR Cable Type ? (400 or 600) 600
B to C ADE to BDE LMR Cable length Meter 50.0
B to C Derived Cable Attenuation (according to length and LMR Type 400 or 600) dB -11.4
CCU1U BDMx Tx Attenuation Selector (0dB or -15dB) dB 0
CCU1U ADMx/BDMx Total Gain (Tx path) dB 19
CCU1U Standard CCU Losses dB -4.0
DSS Standard Dual System Selector Switch Box Losses dB -5.0
Derived Total ADE to BDE LMR Cable Gain/loss (according to length) with Standard CCU and DSS dB -9.2
A Derived L-Band (Tx) Output from Modem for BUC P1dB (System1) dBm -18.7
g BUC Power Watts 20.0
g BUC Power (P1dB) dBm 43.0
BUC Gain (Nominal) dB 70.0
BUC Internal Attenuation dB 0.0
f Derived Input power to BUC for P1dB dBm -27.0
c to d, e to f Total Pedestal Attenuations: Cables (L-Band cables and Mux cable) + Rotary Joint dB -7.8
c Derived Input power to Pedestal for BUC P1dB (Mux) dBm -19.2
A Tx L Band Frequency from MODEM MHz 1200
c MUX Band - Tx Frequency (@ Multiplexed highest frequency) MHz 4500
Which LMR Cable Type ? (400 or 600) 600
b to c ADE to BDE LMR Cable length Meter 100.0
b to c Derived Cable Attenuation (according to length and LMR Type 400 or 600) dB -21.7
DSS BDMx Tx Attenuation Selector (0dB or -15dB) dB 0
DSS ADMx/BDMx Total Gain (Tx path) dB 19
DSS DSS Standard CCU Losses dB -4.0
DSS Standard Dual System Selector Switch Box Losses dB -5.0
Derived Total ADE to BDE LMR Cable Gain/loss (according to length) with Standard CCU and DSS dB -19.5
A Derived L-Band (Tx) Output from Modem for BUC P1dB (System2) dBm -7.5
Dual OceanTRx4-Total Tx level Budget (L-Band from Modem)