Comtech EF Data HPCST-5000 - Manual (Page 39)

High-Power TWTA Satellite Terminals Introduction
Rev. 1 1-23
Table 1-15. HPKST-12000 Transmit Characteristics
Transmit Characteristics
Frequency Range, RFT-1200 14.0 to 14.5 GHz
(2.5 MHz step size, 1.0 MHz option)
Output Power at Saturation:
125W TWT
350W TWT 100W
300W
TX IF Input Level Range -35 to -25 dBm
System Gain:
100W System:
at 6 dB backoff, small signal
at saturated pwr, large signal
300W System:
at 6 dB backoff, small signal
at saturated pwr, large signal
72 dB min
77 dB min
78 dB min
82 dB min
TX IF Input Bandwidth at -1 dB 70 ± 18 MHz
Gain Stability (over temp):
Flatness
Variation
± 1.5 dB (matched RFT with TWTA)
± 1.5 dB/36 MHz
± 2.0 dB max
Group Delay (any 36 MHz):
Linear
Parabolic
Ripple
IESS-309, Figure 3, < 10 ns
0.28 ns/MHz
0.15 ns/MHz
≤ 5 ns p-p
TX Frequency Stability ± 1 x 10 -8
TX Synthesizer Lock-up Time <
1 second
Spurious (not inter-mods):
at 6 dB backoff
with carrier off
IESS-309, Paragraph 3.2.1
-40 dBc min (
≤ 2.048 MHz inform rate)
-50 dBc min (> 2.048 MHz inform rate)
-24 dBm/0.4 kHz max (anywhere in satellite band)
Intermod Spurious:
with two equal carriers
Harmonic (out of band)
-22 dBc at 6 dB backoff
-60 dBc at 6 dB backoff
TX Phase Noise (SSB) at:
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
Maximum
-30 dBc/Hz
-60 dBc/Hz
-70 dBc/Hz
-75 dBc/Hz
-80 dBc/Hz