Miteq DNB-2B User manual

100 Davids Drive
Hauppauge, New York 11788-2034
Tel: [phone]
Fax: [phone]
www.miteq.com
OPERATION AND
MAINTENANCE MANUAL
MULTIBAND BLOCK DOWNCONVERTERS
The model number supplied is:
______ DNB-2B
______ DNB-3B
______ DNB-3B-1
The MITEQ reference number is:
Revision B
5/04

2
MANUAL REVISIONS
5/7/04: REV.A TO REV.B
ADDED SECTION 3.7 AND SUBSECTIONS 3.7.1, 3.7.2, 3.7.3, 3.7.4, APPENDICES
AND GLOSSARY - ETHERNET INTERFACE INSTALLATION AND
OPERATION
UPDATED SECTION 3.2.1 TO INCLUDE ETHERNET INFORMATION
REVISED TABLE OF CONTENTS TO INCLUDE AFFORMENTION CHANGES

3
TABLE OF CONTENTS
SECTION 1
INTRODUCTION
Paragraph Page
1.1 GENERAL DESCRIPTION................................................................................ 7
1.1.1 PHYSICAL.............................................................................................. 7
1.1.2 FUNCTIONAL ........................................................................................ 8
1.1.3 MODEL NUMBERS............................................................................... 8
Converter Model Numbers..................................................................... 8
1.2 EQUIPMENT CHARACTERISTICS.................................................................. 9
1.2.1 PHYSICAL.............................................................................................. 9
Connector Wiring Information................................................................ 9
1.2.2 FUNCTIONAL ........................................................................................ 10
SECTION 2
INSTALLATION
2.1 UNPACKING, STORAGE, RESHIPMENT........................................................ 13
2.2 MOUNTING ...................................................................................................... 13
2.3 TURN-ON PROCEDURE.................................................................................. 13
SECTION 3
OPERATION
3.1 CONTROLS....................................................................................................... 15
3.1.1 EXTERNAL CONTROLS....................................................................... 15
AC Power............................................................................................... 15
Fuse ...................................................................................................... 15
3.1.2 INTERNAL CONTROLS........................................................................ 15
Power Supply Output Voltage Adjustment............................................ 15

4
TABLE OF CONTENTS (Cont.)
SECTION 3
OPERATION
Paragraph Page
3.2 FRONT PANEL OPERATIONS......................................................................... 15
3.2.1 KEYPAD OPERATION.......................................................................... 16
Menu Key............................................................................................... 16
Cursor Key............................................................................................. 16
Data Entry Keys..................................................................................... 16
3.2.2 MAIN MENU........................................................................................... 17
3.2.3 ALARM MENU....................................................................................... 19
3.2.4 REMOTE OPERATION MENU.............................................................. 21
3.2.5 AUXILIARY MENU................................................................................. 23
3.2.6 UTILITY MENU...................................................................................... 23
3.2.7 UNIT TITLE MENU................................................................................ 24
3.3 REMOTE OPERATION...................................................................................... 25
3.4 SERIAL REMOTE PROTOCOL (RS485/RS422/RS232)................................. 25
3.4.1 SERIAL MESSAGE FORMAT............................................................... 25
3.5 IEEE-488 MESSAGE PROTOCOL................................................................... 27
3.5.1 IEEE-488 MESSAGE FORMAT ............................................................ 27
3.6 COMMAND CODE SUMMARY......................................................................... 28
3.6.1 COMMAND CODES.............................................................................. 28
3.6.2 ERROR CODES (SERIAL PROTOCOL ONLY) ................................... 28
3.6.3 SYSTEM FAULT STATUS = ALR......................................................... 29
3.6.4 UNIT ATTENUATION = ATT................................................................. 29
3.6.5 FREQUENCY BAND INFORMATION = BND....................................... 30
3.6.6 INTERNAL CALENDAR/CLOCK = CLK ............................................... 30
3.6.7 UNIT COMBINATION COMMAND = COM........................................... 31
3.6.8 EXTERNAL ALARM CONFIGURATION = EAC................................... 31
3.6.9 LO FREQUENCY = FRQ....................................................................... 32
3.6.10 ALARM LOG = LOG.............................................................................. 32
3.6.11 UNIT MEMORY REGISTER STORE/RECALL = MEM........................ 33
3.6.12 UNIT MUTE COMMAND = MUT ........................................................... 34
3.6.13 UNIT NAME = NAM............................................................................... 34
3.6.14 REFERENCE FREQUENCY ADJUSTMENT = REF............................ 34
3.6.15 FIRMWARE TITLE AND REVISION = REV.......................................... 35
3.6.16 UNIT MEMORY REGISTER STORE/RECALL AND SET = SET........ 35
3.6.17 UNIT STATUS = STA (SERIAL PROTOCOL ONLY)........................... 36
3.6.18 USER TITLE = USR............................................................................... 37
3.6.19 SYSTEM VOLTAGES = VLT................................................................. 37
3.6.20 EXAMPLES............................................................................................ 37
3.6.21 IEEE-488 SERVICE REQUEST............................................................ 38

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TABLE OF CONTENTS (Cont.)
SECTION 3
OPERATION
Paragraph Page
3.7 ETHERNET INTERFACE INSTALLATION AND OPERATION........................ 39
3.7.1 FUNCTIONAL DESCRIPTION.............................................................. 39
3.7.2 INSTALLATION...................................................................................... 39
3.7.3 ACCESSING THE SYSTEM.................................................................. 40
3.7.4 FIRMWARE UPGRADE......................................................................... 43
SECTION 4
PRINCIPLES OF OPERATION
4.1 INTRODUCTION................................................................................................ 47
4.2 FUNCTIONAL DESCRIPTION.......................................................................... 47
4.2.1 DOWNCONVERTER FUNCTIONAL DESCRIPTION........................... 47
4.2.2 BLOCKDIAGRAMS............................................................................... 48
4.2.3 FREQUENCY PLANS............................................................................ 48
4.3 MAJOR SUBASSEMBLIES FUNCTIONAL DESCRIPTION............................. 49
4.3.1 DOWNCONVERTER RF MODULE (A2A1).......................................... 49
4.3.2 OUTPUT MODULE (A2A3).................................................................... 49
4.3.3 CRYSTAL OSCILLATOR (A3A1).......................................................... 50
4.3.4 LOCAL OSCILLATOR (A3A2)............................................................... 50
4.3.5 POWER SUPPLY (A1A1)...................................................................... 51
4.3.6 CONTROL BOARD/FIRMWARE KIT (A4A1)........................................ 51
4.3.7 FAN (A1A2)............................................................................................ 51

6
TABLE OF CONTENTS (Cont.)
SECTION 5
MAINTENANCE
Paragraph Page
5.1 PREVENTIVE MAINTENANCE......................................................................... 52
5.1.1 DC VOLTAGE........................................................................................ 52
5.1.2 GAIN OF THE CONVERTER................................................................ 52
5.1.3 FREQUENCY MEASUREMENT ........................................................... 52
5.2 CORRECTIVE MAINTENANCE........................................................................ 52
5.3 CHANGING THE REMOTE INTERFACE FROM RS485/422 TO RS232 OR
FROM RS232 TO RS485/422........................................................................... 53
5.3.1 INSTALLING A NEW CONTROL BOARD/FIRMWARE KIT (A4A1).... 54
LIST OF DIAGRAMS
Figure 1-1 Front Panel, Frequency Converter.............................................................. 7
Figure 1-2 Real Panel, Frequency Converter............................................................... 7
Figure 3-1 Internal Power Supply Adjustment.............................................................. 15
Figure 4-1 Downconverter Functional Block Diagram.................................................. 48

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SECTION 1
INTRODUCTION
1.1 GENERAL DESCRIPTION
1.1.1 PHYSICAL
Figure 1-1. Front Panel, Frequency Converter
Figure 1-2. Rear Panel, Frequency Converter
RFIF
REMOTE (J6)
ALARM (J3)
0I

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1.1.2 FUNCTIONAL
The MITEQ Multi-band Block Converters are designed for advanced satellite communications
systems. Both upconverters and downconverters are available for a wide variety of frequency
conversion scenarios. Phase noise, amplitude flatness, group delay and spurious outputs have
been optimized to provide the user with a transparent frequency conversion for all video and
data applications.
A strong feature set of monitor and control functions supports powerful local and remote control.
Among the features are control of frequency, attenuation, and 64 memory locations for each
converter where various setups can be stored and recalled easily. Also, a log is continuously
updated with time stamped records of activity for each converter. The equipment can operate
stand-alone or can be arranged in a redundancy configuration without the need for a dedicated
switch control unit.
1.1.3 MODEL NUMBERS
Converter Model Numbers
Multi-band Block Downconverters
Model Number Band Input band Output band
DNB-3B Band 1 10.7-11.45 GHz 0.95-1.7 GHz
Band 2 11.45-12.2 GHz 0.95-1.7 GHz
Band 3 12.2-12.75 GHz 0.95-1.5 GHz
DNB-3B-1 Band 1 10.95-11.7 GHz 0.95-1.7 GHz
Band 2 11.7-12.2 GHz 0.95-1.45 GHz
Band 3 12.2-12.75 GHz 0.95-1.5 GHz
DNB-2B Band 1 10.7-11.75 GHz 0.95-2.0 GHz
Band 2 11.7-12.75 GHz 0.95-2.0 GHz

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1.2 EQUIPMENT CHARACTERISTICS
1.2.1 PHYSICAL
Weight.................................................................................................................18 pounds nominal
Chassis Dimensions..........................................................................19” x 20” x 1.75” panel height
RF connectors................................................................................................................SMA female
RF Monitor connector....................................................................................................SMA female
IF Connectors......................................................................................................................N female
IF Monitor connector..................................................................................................... SMA female
LO Monitor connectors..................................................................................................SMA female
Alarm connector......................................................................................................................DE-9P
Remote interface connector
RS485, RS422, RS232......................................................................................................DE-9S
IEEE-488.....................................................................................................IEEE-488 receptacle
Primary power input connector..............................................................................................IEC320
Connector Wiring Information
Alarm Connector (J3)
Function Pins Normal Fault
Summary Alarm 4,5 Open Closed
Summary Alarm 5,6 Closed Open
Redundancy Alarm 1,2 Open Closed
Redundancy Alarm 2,3 Closed Open
External Alarm Input 7,8 User defined
Remote Interface Connector (J6)
RS485 and RS422 RS232
Pin Designation Pin Designation
1Ground 2RCV Data
3Data Out - 3Tx Data
5Data In - 5Ground
7Data Out + 7RTS
9Data In + 8CTS

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1.2.2 FUNCTIONAL
Converter Performance Specifications
Type Single conversion
Frequency step size See Model Number Table
Frequency sense No inversion
Model Number Band Input band Output band
DNB-3B Band 1 10.7-11.45 GHz 0.95-1.7 GHz
Band 2 11.45-12.2 GHz 0.95-1.7 GHz
Band 3 12.2-12.75 GHz 0.95-1.5 GHz
DNB-3B-1 Band 1 10.95-11.7 GHz 0.95-1.7 GHz
Band 2 11.7-12.2 GHz 0.95-1.45 GHz
Band 3 12.2-12.75 GHz 0.95-1.5 GHz
DNB-2B Band 1 10.7-11.75 GHz 0.95-2.0 GHz
Band 2 11.7-12.75 GHz 0.95-2.0 GHz
Input characteristics
Frequency See Above Table
Impedance 50 Ohms
Return loss 20 dB minimum
Signal monitor -20 dBc nominal
LO Leakage -80 dBm maximum
Input level (non-damage) +20 dBm maximum
Output characteristics
Frequency See Above Table
Impedance 50 Ohms
Return loss 18 dB minimum
Signal monitor N/A
Power output at 1 dB
compression point +10 dBm minimum
Transfer characteristics
Gain +30 dB minimum
Noise Figure 15 dB
Image rejection 80 dB minimum
Level stability ±0.25 dB/day at constant temperature
Amplitude response ±0.5 dB/80 MHz
±1.0 dB over any band
Group delay 1 ns over any band typical
Intermodulation distortion
(third order) With two 0 dBm output signals, 40 dBc minimum
AM/PM conversion 0.1°/dB maximum up to 0 dBm output
Spurious outputs
Signal related 60 dBc up to 0 dBm output
Signal independent -75 dBm maximum
Gain adjustment 30 dB in 0.2 dB steps
Frequency stability
Standard ±2 x 10-8, 0 to 50°C
±5 x 10-9/day typical (fixed temperature after 24 hours on time)
Option 10B ±5 x 10-9, 0 to 50°C
1 x 10-9/day typical (fixed temperature after 24 hours on time)
Option 10C ±2 x 10-9, 0 to 50°C
1 x 10-9/day typical (fixed temperature after 24 hours on time)