
TH I S DO C UM EN T I S TH E PR O P ER TY O F X IC O M TE C HN OL O G Y. RE PR O D UC TI O N OR R E L EA SE W I TH O UT E X PR ESS PER M IS S IO N I S S TR IC TL Y PR OH IB I TE D .
XTRD-400K, 400W, SNG
Document No. 305-0062-301
REV C
Page 2 of 10
1.0
SCOPE.
This specification is for a traveling wave tube amplifier (TWTA) to be used in a
satellite ground station. The TWTA is designed to operate indoors.
2.0
APPLICABLE DOCUMENTS
3.0
SPECIFICATION.
The TWTA shall be designed to the requirements of this specification
per the performance specifications of section 3.0 and tested to the ATP requirements of
section 5.1 of this document
3.1
ELECTRICAL
3.1.1
Frequency
13.75– 14.5 GHz
3.1.2
Power
3.1.2.1
RF Output Power (P
Rated
)
350 W
(55.4 dBm) min
Reference: TWT power of
400 W
(56.0 dBm) min
3.1.2.2
Reflected Power Protection
P
rated
–7 ± 0.5 dB
3.1.3
Gain, Large Signal
70
dB min
3.1.4
Gain, Small Signal
75
dB min
3.1.5
Gain variation, SSG
3.1.5.1
Over any 750 MHz band
2.5
dB/750 MHz max
3.1.5.2
Over any 80 MHz band
1.0
dB/80 MHz
3.1.5.3
Gain slope
± 0.04
dB/MHz
3.1.5.4
Gain stability over temperature
± 1.0
dB@any frequency
3.1.5.5
Gain stability over Time
± 0.25
dB/24 hrs
3.1.6
Gain Control
25
dB min
3.1.7
Intermodulation with 2
equal carriers at TOPBO = -4 dB
-18
dBc max
3.1.8
Harmonic Output
-60
dBc max
3.1.9
AM to PM conversion
2.5
deg/dB at 6 dB below
rated power max
EAR EXPORT CONTROLLED: The information contained in this Manual refers or relates to a product that is subject
to the U.S. Export Administration Regulations (EAR). Transfer of data herein by any means to a Foreign Person,
whether in the U.S. or abroad, may require an export license from the U.S. Department of Commerce.