Vertex LT-3000 SERIES Manual

CG-1294
(previously
TM-LT3000)
OPERATION & MAINTENANCE
MANUAL
UP/DN CONVERTER
L-BAND
LT-3000 SERIES
1915 Harrison Road
Longview, Texas 75604 USA
Tel. [phone]
Fax. [phone]

Integrated L-Band Up/Dn Converter CG-1294
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WARRANTY
VertexRSI warrants its products for a period of two (2) years from the date of
shipment to be free from defects caused by faulty materials or poor workmanship.
The terms and conditions of this warranty are as follows
• The purchaser must notify VertexRSI promptly upon discovery of such defect.
• The purchaser must return the defective product, postpaid, to:
VertexRSI
1915 Harrison Road
Longview, Texas 75604 USA
• Evaluation of the defective product at VertexRSI shall disclose that such
defects exist and have not been caused by misuse, neglect, improper handling,
alteration or accident.
VertexRSI reserves the right to make product improvements and/or design
changes in any of its products without incurring any obligation or liability to
make the same changes in units previously shipped.
Copyright © 2003 by VertexRSI
All rights reserved
Printed in the United States of America
Contents of the manual are subject to change.
No part may be reproduced or transmitted in any form
or by any means without the written permission of
VertexRSI, a TriPoint Global Company
1915 Harrison Road
Longview, Texas 75604 USA

Integrated L-Band Up/Dn Converter CG-1294
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TABLE OF CONTENTS
Section 1 General Information................................................................................................. 5
1.0 Introduction ............................................................................................................................. 5
1.1 Safety Information................................................................................................................... 5
1.2 General Introduction ............................................................................................................... 5
1.3 Purpose of Equipment ............................................................................................................. 5
1.4 Specifications .......................................................................................................................... 6
1.5 Front Panel .............................................................................................................................. 6
1.6 Rear Panel ............................................................................................................................... 6
1.7 Cooling.................................................................................................................................... 6
1.8 Part Number Selection ............................................................................................................ 7
Section 2 Installation............................................................................................................... 11
2.0 Introduction ............................................................................................................................ 11
2.1 Unpacking and Inspection...................................................................................................... 12
2.2 Installation Requirements....................................................................................................... 11
2.3 Mechanical Installation .......................................................................................................... 11
2.4 Electrical Connections............................................................................................................ 11
2.4.1 Power Input ................................................................................................................ 11
2.4.2 Tx L-Band Output (J1)............................................................................................... 11
2.4.3 Tx IF Input (J2) .......................................................................................................... 11
2.4.4 Rx IF Output (J3) ....................................................................................................... 11
2.4.5 Rx L-Band Input (J4) ................................................................................................. 11
2.4.6 External 10 MHz Input (J5) ....................................................................................... 12
2.4.7 Serial SSPB Interface (J6).......................................................................................... 12
2.4.8 Remote Serial I/O Interface (J7) ................................................................................ 12
2.4.9 High Stability 10 MHz Reference (J9) (Optional Connector) ................................... 12
2.5 Operational Check.................................................................................................................. 12
2.5.1 Setup........................................................................................................................... 12
Section 3 Operation................................................................................................................. 13
3.0 Introduction ............................................................................................................................ 13
Section 4 Serial Command Set............................................................................................... 16
4.0 General ................................................................................................................................... 16
4.1 LT-3000 Serial Interface ......................................................................................................... 16
4.2 Communication Protocol......................................................................................................... 16
4.2.1 General Data Format …………………………………………………………………16
4.3 Commands................................................................................................................................... 16
4.3.1 Set Transmitter Frequency ......................................................................................... 16
4.3.2 Set Receiver Frequency.............................................................................................. 16

Integrated L-Band Up/Dn Converter CG-1294
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4.3.3 Set Transmitter Gain ................................................................................................. . 17
4.3.4 Set Receiver Gain....................................................................................................... 17
4.3.5 Set Internal 10 MHz Reference Oscillator Offset ...................................................... 17
4.3.6 Enable SSPB .............................................................................................................. 18
4.3.7 Receiver (LNB) Spectrum Control ............................................................................ 17
4.3.8 SSPB Band Control.................................................................................................... 17
4.3.9 Set SSPB Gain (Attenuation) ..................................................................................... 17
4.3.10 Enable Transmitter ..................................................................................................... 17
4.3.11 Enable Receiver.......................................................................................................... 17
4.3.12 Satellite Memory Store............................................................................................... 17
4.3.13 Satellite Memory Recall............................................................................................. 18
4.4 Status Requests.......................................................................................................................... 18
4.4.1 Command Status ........................................................................................................ 18
4.4.2 Level Status................................................................................................................ 18
4.4.3 L-Band Status............................................................................................................. 19
4.4.4 Set Cable Slope Factor ............................................................................................... 19
4.4.5 Query Cable Slope Factor .......................................................................................... 19
4.4.6 Serial Number Read ................................................................................................... 19
4.4.7 Query Software Version............................................................................................. 19
4.4.8 Query Card Type........................................................................................................ 20
4.4.9 Satellite Memory Status Query .................................................................................. 20
APPENDICES
A Technical Manual Revision History....................................................................................... 21
B GUI Software Revision History ............................................................................................. 21
C CCA Software Revision History............................................................................................ 21
D Display Panel Software Revision History.............................................................................. 21
LIST OF ILLUSTRATIONS
Figure 1-1 Front Panel with Keypad and LCD Display................................................................ 6
Figure 1-2 Rear Panel ................................................................................................................... 7
Figure 3-1 Front Panel Controls and Indicators........................................................................... 13
Figure 3-2 Menu Listing .............................................................................................................. 14
Figure 3-3 Satellite Memory ........................................................................................................ 15
LIST OF TABLES
Table 1-1 Integrated L-Band Specifications................................................................................ 7

Integrated L-Band Up/Dn Converter CG-1294
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SECTION 1 General Information
1.0 INTRODUCTION
This manual contains installation, operation,
and maintenance information for the Integrated
L-Band Up/Dn Converter manufactured by
VertexRSI, Longview, Tx. Information is
organized according to section. Within each
section the pages, figures and tables are
numbered by section and by order of appear-
ance within the section. Unless otherwise
noted, any information about the unit applies
to the LT-3000, Model 201539-100.
1.1 SAFETY INFORMATION
This equipment has been designed to minimize
exposure of personnel to hazards.
W WA AR RN NI IN NG G
A continuous safety earth ground must be
provided from the main power source
through the main power cord. This is
provided in the power cable shipped with
the unit. If this power cord is damaged, it
should be replaced with cord of equal or
better specifications. This cord can be
obtained from VertexRSI.
Servicing instructions are for use by trained
personnel only. To avoid dangerous electric
shock, do not perform any servicing unless
qualified to do so. Do not replace components
with the power cord connected to the
equipment.
W WA AR RN NI IN NG G
Some of the adjustments described in this
manual are performed with power applied
while protective covers are removed.
Always be careful not to come on contact
with dangerous voltages while performing
these procedures, and never work alone.
With power applied to the unit and the
cover removed, be aware that a rotating fan
is operating.
1.2 GENERAL INTRODUCTION
This manual provides operation and service
instructions for the Integrated L-Band Up/Dn
Converter. The unit consists of a power supply,
forced-air cooling system, microprocessor-
based CCA (circuit card assembly) and control
circuitry and the modules required for up and
down conversion. It incorporates extensive
monitor and control functions that are
accessible from the front panel as well as
through a remote serial bus. A general
description of the front and rear panels is given
in Sections 1.5 and 1.6. A description of the
Keypad and Display option can be found in
Appendix A.
The Integrated L-Band Up/Dn Converter is
housed in an enclosure destined for mounting
in a standard EIA 19-inch rack, requiring a
1.75-inch high vertical space.
1.3 PURPOSE OF EQUIPMENT
The Integrated L-Band Up/Dn Converter is a
fully synthesized up and down converter
covering full 575 MHz bandwidth receiving RF
frequencies in up to 1 MHz steps. The unit
incorporates extensive monitor and control
functions that are accessible from the front
panel as well as through a remote RS-
232/422/485 bus.
The LT-3000 can be configured to
accommodate various requirements involving
an IF of 70 or 140 MHz, non-inverted or
inverted spectrum, with standard or high-
stability 10 MHz reference oscillator or any
combination the user desires. Combined with
jumper selectable and user programmable
options, the LT-3000 is flexible to user
requirements.

Integrated L-Band Up/Dn Converter CG-1294
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1.4 SPECIFICATIONS
The specifications for the Integrated L-Band
Up/Dn Converter are listed in Table 1-1, along
with the mechanical dimensions.
1.5 FRONT PANEL
All the operating controls and indicators for the
Integrated L-Band Up/Dn Converter are
located on the front panel. The front panel is
depicted in Figure 1-1. Alarm and level
monitoring of the L-Band Up/Dn Converter
CCA, an external LNB, and SSPB modules is
accomplished through the front panel display
and keboard interface.
1.6 REAR PANEL
The rear panel is depicted in Figure 1-2. It
incorporates, from left to right, Power On/Off
Switch, Power Connector, Grounding Lug
(GND), optional SSPB current (J8), On/Off
Switch for Dc output on J4 (S1), On/Off
Switch for Dc output on J4 (S2), L-Band Out
(J1), IF In (J2), IF Out (J3), L-Band Out (J4),
10 MHz reference (J5), high stability 10 MHz
reference output (J9), SSPB monitor and
control (J6), remote serial interface (J7).
1.7 COOLING
Cooling of the equipment is achieved by
pulling in cool air through the two side inlet
grills. The heated air exits the equipment
through the two rear panel mounted exhaust
fans.
Figure 1-1 Front Panel w/Keypad and LCD Display
Figure 1-2 Rear Panel

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1.8 Part Number Configuration
The Part Number Selection Chart shows configuration options that are set at the factory prior to
shipment. The voltage output to J1 and J4 may be changed as required by the customer, however this
requires removal of the cover and resetting internal jumper connections. This should be performed by
qualified personnel.
1st Digit 2nd Digit 3rd Digit 4th DigitBase
Number
Dash
Frequency Power Output CE Compliance Ref. Oscillator
201539 - 1 70 MHZ 0 J1 22VDC 2A
J4 22VDC 0.5 A
0 No Blank – Standard
Internal 10 MHz
2 140 MHz 1 J1 15VDC 2A
J4 15VDC 0.5A
1 Yes 1 Hi Accuracy
10 MHz
3 70MHz
Inv. Tx
2 J1 22VDC 2A
J4 15VDC 0.5A
4 140MHz
Inv. Tx
3 J1 15VDC 2A
J4 22 VDC 0.5A
4 No Power
Output
5 J1 22VDC 2A
J4 None
6 J1 None
J4 22VDC 0.5A
7 J1 15VDC 2A
J4 None
8 J1 None
J4 15VDC 0.5A

Integrated L-Band Up/Dn Converter CG-1294
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Table 1-1 Integrated L-Band Specifications
UPCONVERTER
Input Frequency Range 50 to 90 MHz
Input Impedance 75 Ohms
Input Level Range -20 to -40 dBm
Output Frequency Range 950 to 1525 MHz
Output Impedance 75 Ohms
VSWR (In and Out) 1.5 : 1
Conversion Gain 10 to 30 dB (0.5 dB steps)
Gain Linearity (over 10 dB)
+0.5 dB
Gain Linearity (over 20 dB) +1.0 dB
Gain Stability (0 to +50 °C) +0.5 dB
Frequency Response (over any 36 MHz) +0.75 dB
Frequency Response (over 575 MHz) +1.0 dB
Output Power (1 dB GCP) +6 dBm (minimum)
3rd Order Intermodulation (for 2 car. each at -5 dBm o/p)
-40 dBc
Spurious (at 0 dBm output) -55 dBc
Transmit Spectrum Sense Non-Inverting (Inverting option)
DOWNCONVERTER
Input Frequency Range 950 to 1525 MHz
Input Impedance 75 Ohms
Input Level Range -75 to -35 dBm
Output Frequency Range 50 to 90 MHz
Output Impedance 75 Ohms
VSWR (In and Out) 1.5 : 1
Conversion Gain 30 to 50 dB (0.5dB steps)
Gain Linearity (over 10 dB) +0.5 dB
Gain Linearity (over 20 dB) +1 dB
Gain Stability (0 to +50 °C)
+1 dB
Frequency Response (over 36 MHz) +0.75 dB
Frequency Response (over 575 MHz) +1 dB
Output Power (1 dB GCP) +6 dBm
Spurious Over 52 to 88 MHz (at -5 dBm output) -50 dBc
Receive Spectrum Sense Inverting or Non-Inverting
Noise Figure 15 dB max

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Table 1-1 Integrated L-Band Specifications
OPTIONAL INTERNAL REFERENCE
Reference Frequency 10.000 MHz
Stability (0 to +50 °C)
+2 x 10-8
Aging per Day + 1 x 10-9
Output Level (rear panel) + 12 dBm +2 dB
Phase Noise @ 10 Hz -115 dBc/Hz
100 Hz -135 dBc/Hz
1 kHz -145 dBc/Hz
10 kHz < -150 dBc/Hz
UPCONVERTER and DOWNCONVERTER
Synthesizer Configuration Dual Tx and Rx with
Independent Programmability
Tx Synthesizer and Rx Synthesizer Step Size 1 MHz
Parameter Memory Storage Non-Volatile EEPROM
L-Band Output Phase Noise:
at 100 Hz Offset -65 dBc/Hz
at 1 kHz Offset -75 dBc/Hz
at 10 kHz Offset -80 dBc/Hz
at 100 kHz Offset -90 dBc/Hz
INTERNAL REFERENCE
Reference Frequency 10.000 MHz
Stability (0 to+50 °C)
+1 PPM
Reference Output Calibration
+10 Hz
Reference Programmable Control
+20 Hz
Output Level (10 MHz on LB IN J4 coax) -2 dBm +2 dB
Output Level (10 MHz on LB OUT J1coax) -2 dBm +2 dB
Optional Output Level (50 MHz on LB OUT J1 coax) -10 dBm +2 dB
Output 2nd Harmonic
-40 dBc
EXTERNAL REFERENCE INPUT
Input Frequency 10.000 MHz
Input Level 0 to +13 dBm
Frequency Stability As Required
CHASSIS PHYSICAL SIZE
Height 1.75 inches
Depth 18 inches
Width 19 inches
Weight 10 lbs. max.

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Table 1-1 Integrated L-Band Specifications
INTERFACE AND CONNECTORS
Voltage (auto-ranging) 115/230 VAC +15%
Internal Electronics (Power) 25 watts
Input & Output Coaxial Connectors
Remote Serial Interface:
Standard: RS-232/RS-422/RS-485 (J7)
DB-9 (Male)
External SSPB Monitor and Control (J6) DB-9 (Female)
DC Output to LNB on J4 (coaxial) 22 or 15VDC @ 0.5 amps (max)
DC Output to SSPB on J1 (coaxial) 22 or 15VDC @ 2.0 amps (max)
Operational Temperature Range 0 to 50 °C

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SECTION 2 Installation
2.0 INTRODUCTION
This section defines the installation require-
ments by which the Integrated L-Band Up/Dn
Converter will meet the published
specifications.
2.1 UNPACKING AND INSPECTION
Remove the unit from its shipping container
and inspect for any damage sustained during
shipment. Save the packing material for
reshipment back to the factory or to another
site. Report any damage to the shipping
forwarder in accordance with required
procedures.
2.2 INSTALLATION REQUIREMENTS
The LT-3000 is designed for mounting in a
standard EIA 19-inch rack. The unit must be
supported on the sides and space must be
allowed at the side of the unit to permit the
flow of cooling air. The unit should be installed
in an environment that is within the environ-
mental envelope described in Table 1-1.
Primary power must be made available that is
within the specified limits.
2.3 MECHANICAL INSTALLATION
The mechanical configuration of the unit is
shown in Figure 2-1. It is equipped with
threaded inserts on either side for the installa-
tion of slides. Slides are not provided with the
unit. The front panel is equipped with slots to
accommodate user-supplied retaining screws.
C CA AU UT TI IO ON N
MOUNTING THE UNIT BY ONLY THE
FRONT PANEL WILL CAUSE EXTENSIVE
DAMAGE.
2.4 ELECTRICAL CONNECTIONS
All electrical connections are made to the rear
panel of the unit. The following describes the
rear panel connectors and its interface
requirements. The chassis ground is a #10-32
lug on the back panel.
2.4.1 Power Input
This connector is an IEC 320-C14 male and
will accept any compatible mating connector.
The power cord supplied as standard with the
unit is equipped with a NEMA 5-15P male
plug at the opposite end and is compatible with
most 115 VAC supplies. The unit is manufact-
ured with a Universal Input Power supply that
will accept voltages in the range of 115 to 230
VAC.
C CA AU UT TI IO ON N
DAMAGE MAY RESULT IF THE INCORRECT
VOLTAGE IS APPLIED TO THE UNIT.
2.4.2 Tx L-Band Output (J1)
This connector is an F-Connector female. The
mate (not supplied) should be compatible with
the 75-ohm coax used to connect to the system.
C CA AU UT TI IO ON N
DC OUTPUT CURRENT MAY BE PRESENT
ON J1 AND J4 DEPENDING ON POWER
OPTIONS SUPPLIED FOR THE SSPB AND
LNB.
2.4.3 Tx IF Input (J2)
This connector is a BNC female. The male
mate (not supplied) should be compatible with
the 75-ohm coax used to connect to the system.
2.4.4 Rx IF Output (J3)
This connector is a BNC female. The male
mate (not supplied) should be compatible with
the 75-ohm coax used to connect to the system.
2.4.5 Rx L-Band Input (J4)
This connector is an F-Connector female. The
male mate (not supplied) should be compatible
with the 75-ohm coax used to connect to the
system.

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2.4.6 External 10 MHz Input (J5)
This connector is a BNC female. The male
mate (not supplied) should be compatible with
the 75-ohm coax used to connect to the system.
2.4.7 Serial SSPB Interface (J6)
This connector is a 9-pin female miniature type
“D” connector with standard #4-40 female
screw-lock hardware mounting. The mating
shell, pins, and strain relief are not supplied.
The electrical interface to this connector is for
a standard RS-422/485/232 bus. For bus
protocol requirements, refer to Section 3-3. The
convention used for the signals is a logic Hi for
Mark (Rest) and a logic Lo for Space. The pin-
out is as follows:
Pin 1 SSPB Band Control Output
Pin 2 Amplifier Fault
Pin 3 Thermal Alarm Input
Pin 4 Lock Alarm Input
Pin 5 Up/Dn Converter Ground
Pin 6 SSPB Attenuator/Enable Control
Pin 7 Not Used
Pin 8 SSPB Detector Input +
Pin 9 SSPB Detector Input –
2.4.8 Remote Serial I/O Interface (J7)
This connector is a 9-pin male miniature type
“D” connector with standard #4-40 female
screw-lock hardware mounting. The mating
shell, pins, and strain relief are not supplied.
The electrical interface to this connector is for
a standard RS-422/485/232 bus. For bus
protocol requirements, refer to Section 3-3. The
convention used for the signals is a logic Hi for
Mark (Rest) and a logic Lo for Space. The pin-
out is as follows:
Pin 1 Rx -
Pin 2 Rx +
Pin 3 Tx +
Pin 4 Tx -
Pin 5 Ground
Pin 6 Alarm Relay: Common
Pin 7 Alarm Relay: Normally Closed
Pin 8 Not Used
Pin 9 Alarm Relay: Normally Open
2.4.9 High Stability 10 MHz Reference
Output (J9) (Optional Connector)
This connector is a BNC female. BNC jumper
cable is supplied with this option for
connection to J5.
2.5 OPERATIONAL CHECK
To verify that the basic functions of the unit are
operational, it is recommended that the
following check-out procedure be followed
prior to final system integration. If there are
any questions regarding performing the
indicated operations, refer to Section 3-3.
2.5.1 Setup
Connect the unit to a primary power source and
turn on the power switch at the front of the
unit. Verify that the power led is illuminated. If
the power led is not illuminated, check the
power cord and fuse. A spare 3.15 A fuse is
provided inside the power connector.
Switch the primary power off and connect the
Tx LB, Tx IF, Rx IF and the Rx LB at the rear
of the chassis to J1, J2, J3 and J4 respectively.
Re-establish the primary source of power. The
Front display will light and status will be
displayed.

Integrated L-Band Up/Dn Converter CG-1294
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SECTION 3 Operation
3.0 INTRODUCTION
The Up/Down Converter can be controlled
from the front panel or remotely via a serial
bus located on the rear panel of the converter.
Various menus are available for EDIT and
DISPLAY purposes.
See Figure A-2 for a listing of the menus.
Section 5 gives a complete description of the
bus commands and conventions for operating
the converter remotely.
ENT
PRESSING THIS BUTTON
CHANGES THE PARAMETERS
ENTERED WHEN IN ANY OF THE
EDIT MENUS. IF THE
PARAMETERS ARE CHANGED
WITH THE NUMERICAL KEYPAD,
BUT IF THIS BUTTON IS NOT
PRESSED, THE PARAMETER
UNDERLINED WILL NOT CHANGE.
USED FOR ENTERING NUMERICAL
DATA FOR VARIOUS PARAMETER
SETTINGS. THE APPLICABLE
NUMBER IS ENTERED AT THE
CURSER UNDERLINE AND THEN
IS PRESSED TO ACCEPT THE CHANGE.
THE DISPLAY WINDOW SHOWS THE
VARIOUS SETTINGS FOR THE UNIT.
CONTROL AND STATUS MENUS
CAN BE VIEWED BY USING THE UP
A
ND DOWN MENUS KEYS.
USED TO MAKE FUNCTIONAL
SELECTIONS WHEN IN ANY OF
THE SET MENUS. THESE KEYS
MOVE A CURSER UNDERLINE
LEFT OR RIGHT TO ENTER
NUMERICAL DATA FROM THE
0-9 KEYS.
6
2 43 5 LCL
8 97 0
ENT MENU
MENU
UC 1200 MHz 25.0 dB
DC 1300 MHz 35.0 dB
A
LARM
IF RF
MONITOR
UC 1200 MHz 25.0 dB
DC 1300 MHz 35.0 dB
PRESSING THIS BUTTON
TOGGLES BETWEEN EDIT
A
ND DISPLAY MODE.
USED TO SCROLL THE
MENU DISPLAY UP
A
ND DOWN.
1
0
ENT
9
LCL
MENU
MENU
ENT
Figure 3-1 Front Panel Controls and Indicators
Red LED illuminates when any of the monitor
functions in the converter are not within pre-defined
parameters. PLUGGED; NOT USED

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Page 14
Figure 3-2 Menu Listing
RefOsc: OK Ofst: 127
Slope Factor: 0dB
Unit Address: xx
Set in: SW
Brd SN 1234 02/12/15
S/W: v5.00 Temp: 32 C
Front Panel SW v2.03
FP Alarm Tone: On
UC 1200 MHz 25.0 dB
DC 1300 MHz 35.0 dB
UC: Ovr State: On
DC: Low State: Muted
UC Lvl: +1 dBm
DC Lvl: -25 dBm
SSPB: Muted Lck: Bad
Amp: OK Therm: N/A
LNB: OK Lvl: 000mA
Spectrum: Non-Invert
MENU
LCL
BOARD STATUS
RefOsc: OK Ofst: 127
Slope Factor: 0dB
REFERENCE STATUS
AND CONTROL/
SLOPE FACTOR SET
LCL RS 485 ADDRESS
AND STATUS
Unit Address: xx
Set in: SW
Front Panel SW v2.03
FP Alarm Tone: On
UC 1000 MHz 15.0 dB
DC 1500 MHz 30.0 dB
SOFTWARE VERSION
AND ALARM CONTROL
DEFAULT MENU
LCL
LCL FREQUENCY AND
GAIN SETTINGS
UC: Ovr State: On
DC: Low State: Muted
LCL
UP/DN CONVERTER
STATUS AND MUTE
CONTROL
DETECTOR LEVELS
SSPB: Muted Lck: Bad
Amp: OK Therm: Act
LNB: OK Lvl: 000mA
Spectrum: Non-Invert
LCL
LCL
SSPB STATUS AND
ALARM MASK
CONTROL
LNB AND DOWN
CONVERTER STATUS
MENU
DISPLAY EDIT
SSPB: Muted Lck: Bad
Amp: OK Therm: Act
MENU BUTTONS TOGGLE
ALARMS FROM ACTIVE TO
MUTED STATES WHEN IN
EDIT MODE
MENU
MENU

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Page 15
Figure 3-3 Satellite Memory
UC0 1200 MHz 20.0 dB
DC0 1200 MHz 30.0 dB
ENT
UC1 _ _ _ _ _ _ _ _
DC1 _ _ _ _ _ _ _ _
EDIT
UC 0950 MHz 10.0 dB
DC 1525 MHz 30.0 dB
ENT1
UC1 1000 MHz 30.0 dB
DC1 1500 MHz 50.0 dB
HIT ANY KEY (0-9)
Example (KEY 0)
0
LCL
CONFIRM AND STORE
CHANGE TO EACH
FIELD AND LEAVE
EDIT MODE AFTER
LAST FIELD
ENTER KEY RECALLS
MEMORY TO ACTIVE
MENU
HIT ANY KEY (0-9)
Example (KEY 0)
MENU
UC1 1000 MHz 30.0 dB
DC1 1500 MHz 50.0 dB

Integrated L-Band Up/Dn Converter CG-1294
Page 16
SECTION 4 Serial Command Set
4.0 GENERAL
The standard Up/Dn Converter is controlled via a rear panel serial link (RS232/422/485). With the
front panel control option, a user can operate the L-Band Up/Dn Converter from its front panel as well
as from the serial link. This section describes the format for the ASCII serial control as well as front
panel operation.
4.1 LT-3000 SERIAL INTERFACE
The serial interface format to the Up/Dn Converter for RS-232/422 is identical to the RS-485 format
except that under RS-485, the format includes an address field (aa in the format below).
4.2 COMMUNICATION PROTOCOL
Baud Rate: 9600
Parity: None
Data Bits: Eight
Start Bits: One
Stop Bits: One
4.2.1 General Data Format
{aaCND…}
Where:
{ = Start byte
aa = 2 character address (00 to 50, remote interface only)
C = 1 character, either C (Command) or S (Status)
N = 1 number 0 to 9, A,B,C Command or Status Number
D = 1 or more Data characters (depending on command)
} = Stop byte
Note: The address is only used in the RS-485 mode when having several addressable units
communicating with one station.
4.3 COMMANDS
4.3.1 Set Transmitter Frequency
{aaC1xxxx} Where xxxx = 4 numeric data characters
Range: 0950 to 1525 (MHz) for Low Band units
Range: 1450 to 1750 (MHz) for High Band units
4.3.2 Set Receiver Frequency
{aaC2xxxx} Where xxxx = 4 numeric data characters
Range: 0950 to 1525 (MHz) for Low Band units
Range: 1450 to 1750 (MHz) for High Band units

Integrated L-Band Up/Dn Converter CG-1294
Page 17
4.3.3 Set Transmitter Gain
{aaC3xxx} Where xxx = 3 numeric data characters
Range: 100 to 300 (10.0 dB to 30.0 dB)
in 0.5 dB steps)
4.3.4 Set Receiver Gain
{aaC4xxx} Where xxx = 3 numeric data characters
Range: 300 to 500 (30.0 dB to 50.0 dB)
in 0.5 dB steps)
4.3.5 Set Internal 10 MHz Ref Oscillator Offset
{aaC5xxx} Where xxx = 3 numeric data characters
Range: 000 to 255 (0 through 10 volts)
4.3.6 Enable SSPB
{aaC6x} Where x = 0 to disable SSPB control
and x = 1 to enable SSPB control
4.3.7 Receiver (LNB) Spectrum Control
{aaC7x} Where x = 0 for Non-Inverting spectrum
and x = 1 for Inverting spectrum
4.3.8 SSPB Band Control
{aaC8x} Where x = 0 for SSPB Low Band control
and x = 1 for SSPB High Band control
4.3.9 Set SSPB Gain (Attenuation)
{aaC9xx) Where xx = 2 data characters (sign and number)
Range: –8 to –0 (-8 to 0 dB) or ++ for full on.
4.3.10 Enable Transmitter
{aaCAx} Where x = 0 to disable or mute the transmitter
and x = 1 to enable or un-mute the transmitter
4.3.11 Enable Receiver
{aaCBx} Where x = 0 to disable or mute the receiver
and x = 1 to enable or un-mute the receiver
4.3.12 Satellite Memory Store
{aaCSSxyyyyyyyyyy} Where x = Number from 0 to 9 (memory position)
y = ASCII character making up to a 10 character name for the satellite
Stores current Tx and Rx Frequencies and Gains to
storage position specified along with a Text name
for that satellite is so desired.

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4.3.13 Satellite Memory Recall
{aaCSRx} Where x = Number from 0 to 9 (memory position)
Recalls saved satellite settings of Frequencies and
Gains to the current set-up.
4.4 STATUS REQUESTS
4.4.1 Command Status
{aaS1}
Returns: {aaS1bbbbccccdddeeefffNL}
Where bbbb = Tx Frequency (as above)
cccc = Rx Frequency (as above)
ddd = Tx Gain
eee = Rx Gain
fff = Ref. Osc. Offset
N = 0 for SSPB disable, 1 for SSPB enable
L = 0 for non-Inverting LNB, 1 for inverting
4.4.2 Level Status
{aaS2}
Returns: {S2MLffppeett}
Where: M = ASCII-hex Char. MSN of bitmapped status
F indicates no alarm in group
D7 – Low = SSPB Lock Alarm
D6 – Low = SSPB Thermal Alarm
D5 – Low = SSPB Amp Alarm
D4 – Low = LNB Alarm
Where: L = ASCII-hex Char. LSN of bitmapped status
F indicates no alarm in group
D3 – Low = Ext. 10 MHz Ref. Osc. Alarm
D2 – Low = Rx Synthesizer Alarm
D1 – Low = Tx Synthesizer Alarm
D0–Low=SummaryAlarm
Where: ff = 2 Chars., Forward SSPB Power Detection
Range: 00 or 16 to 40 (dBm) (00 = No SSPB)
Where: pp = 2 Chars., L-Band Tx Output Level Detection
Range: 25 to +5 (-25 to +5 dBm)
Where: rr = 2 Chars., L-Band Rx Input Level Detection
Range: 25 to +5 (-25 to +5 dBm)
Where: tt = 2 Chars., on board Temperature Monitor
Range: 00 to 70 (0 to 70°C)

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4.4.3 L-Band Status
{aaS3}
Returns: {S3bbCddTRee}
Where: bb = 2 Chars., LNB current Detection
Range: 00 to 55 ( 0 – 550 mA) or
00 to 99 ( 0 - 990 mA) for high current units
C = 1 Character, SSPB Band Control
Range: 0 = low band, 1 = high band
dd = 2 Characters, SSPB Gain
Range: –8 to –0 or ++ (dB) ++ = Full On
T=1Character,Txenable
Range: 0 = disable, 1 = enable
R = 1 Character, Rx enable
Range: 0 = disable, 1 = enable
ee = 2 Character, SSPB current detection
Range: 00 to 30 (0 – 3.0 A)
4.4.4 Set Cable Slope Factor
{aaFx} Where x = numeric character
Range: 0 to 5 (dB/100 MHz)
4.4.5 Query Cable Slope Factor
{aaF}
Returns: {F = x}
Where:x = numeric character
Range: 0 to 5 (dB/100 MHz)
4.4.6 Serial Number Read
{aaID}
Returns: {aaIDyymmddxxxx}
Where : yy = last 2 digits of year
mm=month
dd = day
xxxx = 4 digit sequence number
4.4.7 Query Software Version
{aaV}
Returns: {aaVr.ii}
Where: r = Software Release number (1 – 9)
ii = Software Issue number (00 – 99)

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4.4.8 Query Card Type
{aaZ}
Returns: {aaZx}
Where: x = L-Band Card Type (1 – 8)
1 = 70 MHz IF, Low Band Unit (LBU)
2 = 140 MHz IF, LBU
3 = 70 MHz IF, High Band Unit (HBU)
4 = 140 MHz IF, HBU
5 = 70 MHz IF, LBU with Inv. Tx Spectrum
6 = 140 MHz IF, LBU with Inv. Tx Spectrum
7 = 70 MHz IF, HBU with Inv. Tx Spectrum
8 = 140 MHz IF, HBU with Inv. Tx Spectrum
4.4.9 Satellite Memory Status Query
{aaSSx}
Where x = Number from 0 to 9 (memory position)
Returns: {aaSSxbbbbccccdddeee}{yyyyyyyyyy}
Where: x = The number of the Satellite Memory location
bbbb = Frequency for the Transmitter
cccc = Frequency for the Receiver
ddd = Gain for the Transmitter
eee = Gain for the Receiver
y = ASCII character making up to a 10 character
name for the satellite