E Tx Evm; Tx Spectral Regrowth; G Intermodulation Products In The Tx-Band; Spurious And Noise In The Tx-Band - Honeywell ASPIRE-400 System Description, Installation And Maintenance Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
(f)
E. Tx EVM
(1) When conditioned by 2 continuous carriers, each with 64-QAM modulation
characteristics yet of independent test sequences and each of 1/2 of the HPA maximum
rated average power, the mean squared EVM of the test carrier as measured at the Tx
output port is less than 0.002.
F.

Tx Spectral Regrowth

(1) For two (2) modulated carriers of the same type but of independent test sequences and
each of carrier-rated power, the spectral regrowth as assessed by one of the carriers is
simultaneously less than the limits defined by breakpoints for "Case I" and "Case E" as
expressed in each corresponding table for the modulation type under the following
conditions:
(a)
(b)
(c)
(d)
(e)
(f)
G. Intermodulation Products in the Tx-band
(1) Tx output port referenced two tone IM, or optionally modulated carrier power spectral
density in 3 kHz two carrier IM, in the Tx-band of 1626.5 MHz to 1660.5 MHz achieves IM
performance of:
(a)
(b)
(2) Under conditions of:
(a)
(b)
(c)
H.

Spurious and Noise in the Tx-band

(1) Tx output port referenced spurious and noise in the Tx-band, 1626.5 MHz to 1662.5 MHz,
is less than -44.5 dBm/3 kHz outside and offset from the nominated bandwidth by 1500
kHz under conditions of:
(a)
(b)
EFFECTIVITY
ALL
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ASPIRE-400
Minimum of 1000 bursts.
Carrier separation exceeding at least twice that of the assessed spectrum
bandwidth
Both carriers are contained to 1626.5 MHz to 1660.5 MHz
Signal source purity better than measurement limits by at least 20 dB
A carrier signal(s) of carrier-rated power and a system applicable modulation
Limit assessment at frequency offset greater than -70 dBc intercept relaxed to
-70 dBc
dBe limits expressed in relative power with respect to the carrier power
measured in the same bandwidth.
NOTE: Allocation Case I is 2.5 dB more stringent than Inmarsat system
specification.
Less than -30.5 dBc for 3rd and 5th order IM
Less than -36 dBc for 7th and 9th order IM.
Carrier signals of maximum carrier-rated power and a system applicable
modulation (optionally)
Carrier separation of at least 200 kHz
Carriers confined to 1626.5 MHz to 1660.5 MHz.
A carrier signal of 5 dB less than maximum carrier-rated power and a system
applicable modulation
17 dBi antenna gain
23-15-49
3rd rvw Draft as of:
29 January, 2020
Page 2-7
22 Apr 2019