The Xicom XTRD-400C is a highly efficient rack
mountable traveling wave tube amplifier (TWTA)
designed for fixed and mobile uplink applications.
The unit includes RF gain control, a solid
state pre-amplifier, RF filters, cooling, and
monitoring and control (M&C) systems.
Rack space is conserved because the
amplifier occupies only 3 rack units (5¼
inches) of a standard 19-inch rack cabinet.
Nominal weight is 56 pounds.
Power Factor Correction
Digital Display & Control Interface
The unit features a menu driven front
panel display and RS-232/422/485 serial port
interfaces for complete computer control. RF,
traveling wave tube, and default parameters
are easily monitored on the four line front
Gain control is provided via the front panel
or through the serial interface.
The XTRD-400C incorporates high
efficiency, dual stage collector TWTs.
Reliability is enhanced because both prime
power consumption and internal operating
temperatures are reduced for both the linear
and saturated modes of operation.
Power factor correction circuitry is also
included which minimizes line current
distortion and reduces the required Volt-
The automatic features of the high
frequency resonant conversion power supply
include quick recovery from prime power
outages and mulitiple helix fault resets (three
Depending upon user requirements these
amplifiers can be configured for either single
thread or redundant system operation.
5.850 to 6.425 GHz
(5.85 to 6.650 GHz)(option)
Traveling Wave Tube
Rated Power @ Amplifier Flange
Large Signal, minimum
Small Signal, minimum
Attenuator Range (continuous)
Maximum SSG Variation Over:
Any narrow band
1.0 dB per 40 MHz
2.5 dB/575 MHz
± 0.04 dB/MHz
Stability, 24 Hr maximum
± 0.25 dB
± 1.0 dB maximum over temperature range at any frequency
with two equal signals
- 18 dBc maximum with two equal carriers at
4 dB total power backoff from rated output
Harmonic Output, maximum
- 60 dBc
AM/PM Conversion, maximum
2.5°/dB at 6 dB below rated power
Noise Power, maximum
- 70 dBW/4 kHz
- 150 dBW/4 kHz
3.7 to 4.2 GHz
Group Delay Max over any 40 MHz Bandwidth