Tx Rf Modes Of Operation; General - Honeywell ASPIRE-400 System Description, Installation And Maintenance Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
4.

Tx RF Modes of Operation

A.

General

Tx Type
Tx RF Input VSWR
Tx RF Input Dynamic
Range
Tx RF Input
Instantaneous Dynamic
Range
Tx RF Input Damage
Level
Tx RF Load VSWR
Capability
EFFECTIVITY
ALL
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ASPIRE-400
Table 2-1. Tx RF Input/Output
Description
The VSWR looking into the Tx RF interface does not exceed
1.5:1 when measured with respect to a characteristic
impedance of 50 ohms anywhere within the L-band Tx
frequency range.
The HPA meets transmit performance requirements for per
carrier input levels
After system calibration and the setting
of the input attenuator value the
instantaneous dynamic range of carriers
post the input attenuator is 20 dB.
Instantaneous per carrier dynamic range
accounts for:
The HPA meets the transmit performance requirements after
exposure to a total average input power of:
The HPA does not sustain permanent damage if operated
continuously at full output into an infinite VSWR load at any
phase angle.
During steady state operation, the HPA does not exhibit
oscillations for any combination of input and output load
impedance within the 2:1 VSWR circle.
The VSWR looking into the RF output port does not exceed
1.5:1 when measured with respect to a characteristic
impedance of 50 ohm anywhere within the L-band Tx
frequency range.
Under conditions of a single modulated carrier, at rated output
power, the measured power with respect to that measured
into a matched resistive load when measured into any load
within the 2:1 VSWR circle is:
Inmarsat System
per carrier gain
adjustment
Antenna reporting
gain range
AES system gain
adjustments to
overcome gain
tolerance
23-15-49
3rd rvw Draft as of:
29 January, 2020
dB(s)
N/A
+10 dBm to -33
dBm
10 dB
8 dB
±2 dB
+20 dBm
>=0.9 dBr
Page 2-4
22 Apr 2019