Xicom XT-50 User manual

OPERATION AND INSTALLATION MANUAL
XT-50, XT-80 AND XT-100
ANTENNA MOUNT TWT POWER AMPLIFIERS

OPERATION & INSTALLATION MANUAL
XT-50, XT-80, AND XT-100
ANTENNA-MOUNT TWT POWER AMPLIFIERS
Document No. 802-0111-001
Revision E
September 2001
3550 Bassett Street
Santa Clara, CA 95054
Phone [phone] ·Fax [phone]

Notice
Copyright 2001
This document contains propriety information which is protected by copyright. All rights are
reserved.
The information in this document is subject to change without notice.
Xicom Technology reserves the right to revise this publication and to make changes from time
to time in the content hereof without obligation of Xicom Technology to notify any person of
such revision or changes.
Xicom Technology makes no warranty of any kind with regard to this material, including, but
not limited to, the implied warranties of fitness for a particular purpose. Xicom Technology
shall not be liable for errors contained herein or for incidental consequential damages in
connection with the furnishing, performance, or use of this material.
Printing History
EDITION DATE ECO DOCUMENT NUMBER
Edition 5 09/07/01 8861 802-0111-001 Rev. E
Edition4 05/05/01 8374 802-0111-001 Rev. D
Edition 3 02/20/98 802-0000-000 Rev. C
Edition 2 10/97 802-0000-000 Rev. B
Edition 1 07/97 802-0000-000 Rev. A

XT-50, XT-80, and XT-100 Amplifiers iii
TABLE OF CONTENTS
1. General Description............................................................................................ 1-1
Overview ............................................................................................................... 1-1
Control and Status Interface................................................................................ 1-2
Performance Specifications.................................................................................. 1-2
2. Installation............................................................................................................ 2-1
Introduction........................................................................................................... 2-1
Unpacking and Inspection................................................................................... 2-1
Mechanical Installation........................................................................................ 2-1
Waveguide Connection.............................................................................. 2-2
Air Ducting.................................................................................................. 2-3
Prime Power Connections ................................................................................... 2-3
AC Prime Power, 100 to 260 VAC, Single Phase.............................................. 2-3
Fuses ...................................................................................................................... 2-4
Controller Connections........................................................................................ 2-4
Control and Monitor Interfaces........................................................................... 2-5
Control Interfaces.................................................................................................. 2-6
Digital Status Circuits........................................................................................... 2-9
Analog Status Circuits........................................................................................ 2-11
Output Voltage Circuits..................................................................................... 2-11
Detected Power Calibration .............................................................................. 2-13
Standard Interconnect Cable............................................................................. 2-13
RF Connectors..................................................................................................... 2-16
3. Operation .............................................................................................................. 3-1
General ............................................................................................................. 3-1
Operating Modes.................................................................................................. 3-1
Heater Delay Mode............................................................................................... 3-1
Heater Standby Mode.......................................................................................... 3-1
Standby Mode....................................................................................................... 3-2
High Voltage ON Mode....................................................................................... 3-2
Fault Mode............................................................................................................. 3-2
Clearing Faults...................................................................................................... 3-3
Control and Status Signals................................................................................... 3-3
Control Signals...................................................................................................... 3-3
Status, Digital........................................................................................................ 3-3
Status, Analog ....................................................................................................... 3-4
Initial Turn-On...................................................................................................... 3-5
Pre-Power Check................................................................................................... 3-5
Turn-On Sequence................................................................................................ 3-5
Turn-Off ............................................................................................................. 3-6

iv XT-50, XT-80, and XT-100 Amplifiers
4. Maintenance and Service................................................................................... 4-1
Preventative Maintenance ................................................................................... 4-1
Remove Lower Deck Cover.................................................................................4-1
Service and Repair................................................................................................ 4-1
Return Authorization........................................................................................... 4-2
Re-Shipment .......................................................................................................... 4-2
List of Figures
1-1 TWT Block Diagram...................................................................................1-1
2-1 Amplifier Outline Drawing.......................................................................2-1
2-2 “Output End”.............................................................................................. 2-2
2-3 Typical Tightening Pattern........................................................................ 2-3
2-4 Location of Prime Power Connector ........................................................2-3
2-5 Connector J2 AC Pinouts ........................................................................... 2-3
2-6 Location of Fuses.........................................................................................2-4
2-7 Location of Controller Interface Connector J1.........................................2-4
2-8 Interface Connector Pinouts...................................................................... 2-5
2-9 Internal Supply Control Circuits...............................................................2-7
2-10 External Supply Control Circuits.............................................................. 2-8
2-11 Digital Status Circuit Isolation.................................................................. 2-9
2-12 TWT Temperature: Temperature vs. Voltage......................................2-12
2-13 Detected Power Calibration.....................................................................2-13
2-13 Interconnect Cable.................................................................................... 2-14
2-14 Interface Cable “D” Connector Pinouts................................................. 2-15
List of Tables
1-1 Models Available........................................................................................1-1
1-2 C-Band Performance Specifications .........................................................1-3
1-3 X-Band Performance Specifications.......................................................... 1-4
1-4 Ku-Band Performance Specifications.......................................................1-5
1-5 Environmental Specifications, All Models...............................................1-6
1-6 Interface Specifications, All Models......................................................... 1-6

XT-50, XT-80, and XT-100 Amplifiers v
High Voltage Hazards
This amplifier utilizes high voltage that can be lethal if contacted. The amplifier should not be
operated without its cover unless you are thoroughly familiar with its operation and are experienced
with high voltage.
RF Radiation Hazards
Prior to operation of the TWTA, ensure that all microwave connections are securely fastened. Check
that there is no microwave leakage from them. Never operate the amplifier with an open waveguide.
This amplifier is capable of generating high power microwave radiation, which can cause bodily
harm.
Safety Summary
Equipment of this nature has inherent hazards. Operator or service technicians should have training
on the XT-50, XT-80, or XT-100 power amplifiers. When the amplifier’s cover is removed, the high
voltage power supply for the TWT has multiple exposed high voltage points. Use extreme care when
operating the amplifier with its cover removed.

XT-50, XT-80, and XT-100 Amplifiers General Description 1-1
CHAPTER 1: GENERAL DESCRIPTION
Overview
This operation manual discusses Xicom Technology antenna-mount power amplifiers with power
levels ranging from 50 Watts to 170 Watts. These antenna-mount units are designed for outdoor
mounting directly to an antenna structure. The standard components of each amplifier include: a
Traveling Wave Tube (TWT), an integral high voltage power supply, and a forced air cooling system.
For a brief product description and typical block diagram, see the table and figure below.
Model Name Frequency Range Band Rated Power @ HPA Flange
XT-50C 5.85 to 6.425 GHz C-Band 50 Watts
XT-100C 5.85 to 6.425 GHz C-Band 140 Watts
XT-50X 7.9 to 8.4 GHz X-Band 50 Watts
XT-100X 7.9 to 8.4 GHz X-Band 125 Watts
XT-50K 14.0 to 14.5 GHz Ku-Band 50 Watts
XT-80K 14.0 to 14.5 GHz Ku-Band 70 Watts
XT-100K 13.75 to 14.5 GHz Ku-Band 100 Watts
Table 1-1 Models Available
Figure 1-1 TWT Block Diagram

1-2General Description XT-50, XT-80, and XT-100 Amplifiers
Control and Status Interface
The XT-50, XT-80, and XT-100 amplifiers are externally controlled. These amplifiers do not include any
control switches or status indicators for operator use. The external control and status indicator
interfaces are detailed in Chapter 2 of this manual.
Performance Specifications
The performance specifications of the C-Band, X-Band, and Ku-Band models are shown in Tables 1-2, 1-
3, and 1-4 respectively. Environmental specifications for all models are summarized in Table 1-5.
Interface specifications are shown in Table 1-6.

XT-50, XT-80, and XT-100 Amplifiers General Description 1-3
Table 1-2 C-Band Performance Specifications
Parameter XT-50C Specifications XT-100C Specifications
FREQUENCY RANGE 5.850 GHz to 6.425 GHz 5.850 GHz to 6.425 GHz
OUTPUT POWER TWT
@ Amplifier Flange 55 Watts 50 Watts 170 Watts 140 Watts
GAIN, Small Signal, Minimum 45 dB 46 dB
GAIN, Large Signal, Minimum 40 dB 40 dB
GAIN VARIATION, SSG
Narrow Band, Maximum
Full Band, Maximum 1.5 dB over any 40 MHz band 2.5 dB 1.0 dB over any 40 MHz band 2.5 dB
GAIN SLOPE, Maximum ±0.04 dB/MHz ±0.04 dB/MHz
GAIN STABILITY IN ANY 24
HOUR PERIOD, Maximum ±0.25 dB ±0.25 dB
GAIN STABILITY OVER
TEMPERATURE ±1.0 dB maximum over operating
temperature range at any frequency ±1.0 dB maximum over operating temperature range at any frequency
INTERMODULATION WITH
TWO EQUAL SIGNALS -18 dBc maximum with two equal carriers at 4 dB total output backoff -18 dBc maximum with two equal carriers at 4 dB total output backoff
HARMONIC OUTPUT,
Maximum -60 dBc -60 dBc
AM TO PM CONVERSION,
Maximum 2.5°/dB at 6 dB below rated power 2.5°/dB at 6 dB below rated power
NOISE POWER
Transmit Band, Maximum
Receive Band, Maximum -70 dBw/4 KHz -150 dBw/4 KHz
3.7 GHz to 4.2 GHz
-80 dBw/4 KHz
-160 dBw/4 KHz
3.7 GHz to 4.2 GHz
GROUP DELAY, Maximum
Bandwidth
Linear
Parabolic
Ripple
Any 40 MHz
0.01 nS/MHz
0.005 nS/MHz2
0.5 nS/Pk-Pk
Any 40 MHz
0.01 nS/MHz
0.005 nS/MHz2
0.5 nS/Pk-Pk
RESIDUAL AM NOISE,
Maximum -50 dBc to 10 KHz -20 (1.5+logf) dBc 10 to 500 KHz
-85 dBc above 500 KHz
-50 dBc to 10 KHz
-20 (1.5+logf) dBc 10 to 500 KHz
-85 dBc above 500 KHz
PHASE NOISE, Maximum 10 dB below IESS phase noise profile
AC fundamental -50 dBc
Sum of all spurs -47 dBc
10 dB below IESS phase noise profile
AC fundamental -50 dBc
Sum of all spurs -47 dBc
VSWR, Maximum
Input
Output 1.3:1 2.2:1 1.3:1 2.2:1

1-4General Description XT-50, XT-80, and XT-100 Amplifiers
Table 1-3 X-Band Performance Specifications
Parameter XT-50X Specifications XT-100X Specifications
FREQUENCY RANGE 7.90 GHz to 8.40 GHz 7.90 GHz to 8.40 GHz
OUTPUT POWER, TWT
@ Amplifier Flange 55 Watts 50 Watts 140 Watts 125 Watts
GAIN, Small Signal, Minimum 53 dB 46 dB
GAIN, Large Signal, Minimum 49 dB 40 dB
GAIN VARIATION, SSG
Narrow Band, Maximum
Full Band, Maximum 1.3 dB over any 40 MHz band 2.5 dB 1.0 dB over any 40 MHz band 2.5 dB
GAIN SLOPE, Maximum ±0.04 dB/MHz ±0.04 dB/MHz
GAIN STABILITY IN ANY 24
HOUR PERIOD, Maximum ±0.25 dB ±0.25 dB
GAIN STABILITY OVER
TEMPERATURE ±1.0 dB maximum over operating
temperature range at any frequency ±1.0 dB maximum over operating temperature range at any frequency
INTERMODULATION WITH
TWO EQUAL SIGNALS -18 dBc maximum with two equal carriers at 4 dB total output backoff -18 dBc maximum with two equal carriers at 4 dB total output backoff
HARMONIC OUTPUT,
Maximum -60 dBc -60 dBc
AM TO PM CONVERSION,
Maximum 2.5°/dB at 6 dB below rated power 2.5°/dB at 6 dB below rated power
NOISE POWER
Transmit Band, Maximum
Receive Band, Maximum -70 dBw/4 KHz -70 dBw/4 KHz
7.25 - 7.75 GHz
-80 dBw/4 KHz
-80 dBw/4 KHz
7.25 - 7.75 GHz
GROUP DELAY, Maximum
Bandwidth
Linear
Parabolic
Ripple
Any 40 MHz
0.01 nS/MHz
0.005 nS/MHz2
0.5 nS/Pk-Pk
Any 40 MHz
0.01 nS/MHz
0.005 nS/MHz2
0.5 nS/Pk-Pk
RESIDUAL AM NOISE,
Maximum -50 dBc to 10 KHz -20 (1.5+logf) dBc 10 to 500 KHz
-85 dBc above 500 KHz
-50 dBc to 10 KHz
-20 (1.5+logf) dBc 10 to 500 KHz
-85 dBc above 500 KHz
PHASE NOISE, Maximum 10 dB below IESS phase noise profile
AC fundamental -50 dBc
Sum of all spurs -47 dBc
10 dB below IESS phase noise profile
AC fundamental -50 dBc
Sum of all spurs -47 dBc
VSWR, Maximum
Input
Output 1.3:1 2.2:1 1.3:1 2.2:1