Cubic Communications CDR-3250 User manual

TECHNICAL MANUAL
OPERATION AND MAINTENANCE INSTRUCTIONS
OPERATIONAL LEVEL
RECEIVER,
DIGITAL SIGNAL PROCESSING,
SINGLE,
VLF - HF
CDR-3250
&
CDR-3280
Cubic Communications, Inc.
9535 Waples Street
San Diego, California 92121-2953
Telephone: [phone] Telefax: [phone]
Manual Part No. 2600-1021-1
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TECHNICAL MANUAL
OPERATION AND MAINTENANCE INSTRUCTIONS
OPERATIONAL LEVEL
RECEIVER,
DIGITAL SIGNAL PROCESSING,
SINGLE,
VLF - HF
CDR-3250
&
CDR-3280
Cubic Communications, Inc.
9535 Waples Street
San Diego, California 92121-2953
Telephone: [phone] Telefax: [phone]
Manual Part No. 2600-1021-1
Issue 2.2 24 December 1998
Change 2 2 March 2001
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.1
RECORD OF CHANGES
CHANGE DATE TITLE OF BRIEF DESCRIPTIONS ENTERED BY
1
2
12 Aug 99
2 March 01
Engineering update. Page changes are as follows:
Title Page, Record of Changes, ii & 3-1.
DCR 730428: Update Generated Spurious data in
Specification table. Pages changed are as follows: Title Page,
Record of Changes & 1-5.
CCI Eng. Dept.
CCI Eng. Dept.
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 i
FOREWORD
SCOPE
This manual contains information to obtain best performance from the CDR-3250 and CDR-3280 receivers. The information
includes:ageneraldescriptionoftheequipment,preparationforuseandinstallationinstructions,operatinginstructions,general
theory of operation, maintenance instructions, preparation for reshipment, storage, and parts list.
PROPRIETARY DATA
Information contained in this document is the property of Cubic Communications,Inc. This information may not be disclosed
to a third party, either wholly or in part, without the written consent of Cubic Communications, Inc.
CORRECTION NOTICE
Information contained in this document is believed to be correct as of the publication date. If a variation is noted between the
information in this manual and the equipment in your possession, contact the factory for clarification. Future issues will be
updated if necessary.
RIGHTS RESERVED
Cubic Communications, Inc. reserves the right to change the specifications, design details, and method of fabrication of the
equipment at any time without notice.
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CDR-3250/80 TECHNICAL MANUAL
ii Change 1 Issue 2.2
TABLE OF CONTENTS
Chapter Page Chapter Page
1 GENERALDESCRIPTION..... 1-1
1-1 INTRODUCTION. .................... 1-1
1-2 EQUIPMENTDESCRIPTION........... 1-1
1-3 SPECIFICATIONS.................... 1-1
1-4 EQUIPMENTFURNISHED ............ 1-1
1-5 STORAGEDATA .................... 1-1
1-6 TOOLS AND TEST EQUIPMENT ....... 1-1
1-7 SAFETYPRECAUTIONS.............. 1-1
2 PREPARATION FOR USE AND
INSTALLATION INSTRUCTIONS 2-1
2-1 INTRODUCTION .................... 2-1
2-2 UNPACKING AND INSPECTION ....... 2-1
2-3 INSTALLATION ..................... 2-1
2-4 CONNECTIONS ..................... 2-1
3 OPERATING INSTRUCTIONS . 3-1
SectionI. LOCALCONTROL........ 3-1
3-1 INTRODUCTION. .................... 3-1
3-2 LOCALOPERATION ................. 3-1
3-2.1 Controls and Display .......... 3-1
3-2.2 Parameter Entry ............. 3-1
3-2.2.1 Vacuum Fluorescent Displays. .. 3-1
3-2.2.1.1 Normal Display .............. 3-1
3-2.2.1.2 Data Entry Display ........... 3-1
3-2.2.1.3 Meter Display ............... 3-1
3-2.2.1.4 ISB Monitor Mode ............ 3-1
3-2.2.2 Controls .................... 3-1
3-3 POWER ON AND INITIAL SET UP ...... 3-5
3-4 EMERGENCYOPERATION ............ 3-5
3-5 INITIAL ADJUSTMENTS AND CONTROL
SETTINGS ........................... 3-5
3-6 NORMALOPERATION ................ 3-5
3-7 SETTING OR CHANGING RECEIVER
PARAMETERS ....................... 3-5
3-7.1 Basic Soft Key Menus ......... 3-9
3-7.2 Primary Soft Key Menu .......3-10
3-7.2.1 Frequency. .................3-10
3-7.2.2 Mode .....................3-10
3-7.2.3 Bandwidth .................3-12
3-7.2.3.1 Assigning Bandwidths to Soft Key
Labels ....................3-13
3-7.2.3.2 Assigning Default Bandwidths To
Receive Modes .............. 3-14
3-7.2.4 Squelch ...................3-14
3-7.2.5 Gain ......................3-15
3-7.2.5.1 Assigning AGC Decay Time
ValuestoSoftKeyLabels .....3-17
3-7.2.5.2 Assigning Default AGC Values
To Receive Modes ...........3-18
3-7.3 Secondary Soft Key Menu .....3-18
3-7.3.1 BFO ......................3-18
3-7.3.2 IF Shift ....................3-19
3-7.3.3 Skip ......................3-19
3-7.3.4 Store ......................3-19
3-7.3.5 Recall .....................3-20
3-7.4 Scan/Sweep Soft Key Menu ....3-21
3-7.4.1 Scan ......................3-21
3-7.4.2 Sweep .....................3-24
3-7.4.3 Step ......................3-28
3-7.4.4 Dwell .....................3-29
3-7.4.5 Bridge ....................3-31
3-7.5 Utility Soft Key Menu .........3-31
3-7.5.1 Test ......................3-31
3-7.5.2 Configuration...............3-32
3-7.5.2.1 Clearing Non-Volatile Memory . 3-32
3-7.5.2.2 Configuring Receiver Remote
Control Operation ........... 3-35
3-7.5.2.2.1 Serial Bus ..................3-35
3-7.5.2.2.2 IEEE-488 Bus .............. 3-39
3-7.5.2.3 Configuring Receiver Default
Settings ...................3-39
3-7.5.3 Faults.....................3-41
3-7.5.4 System ....................3-42
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 iii
TABLE OF CONTENTS - Cont.
Chapter Page Chapter Page
SectionII. REMOTECONTROL...... 3-46
3-8 REMOTE OPERATION USING
SERIALBUS. ...................... 3-46
3-8.1 Serial Bus Description ....... 3-46
3-8.2 Serial Bus Message Format ... 3-46
3-8.3 Serial Bus Message Types .... 3-46
3-8.3.1 Serial Bus Command Messages 3-46
3-8.3.1.1 Serial Bus Radio Command
Messages ................. 3-46
3-8.3.1.2 Serial Bus Interface Command
Messages .................
3-46
3-8.3.2 Serial Bus Status Messages ... 3-46
3-8.3.2.1 Serial Bus Radio Status
Messages .................
3-46
3-8.3.2.2 Serial Bus Interface Status
Messages ................. 3-48
3-8.4 Serial Bus Message Protocol .. 3-48
3-8.4.1 Serial Bus Normal Mode ..... 3-48
3-8.4.2 Serial Bus Acknowledge Mode 3-48
3-8.4.3 Serial Bus Independent Mode .3-48
3-8.5 Line Driver Operation ....... 3-48
3-8.6 Broadcast Address .......... 3-48
3-8.7 Serial Bus Message Definition .3-48
3-9 REMOTE OPERATION USING
IEEE-488 BUS. ......................
3-68
3-9.1 IEEE-488 Bus Description .... 3-68
3-9.2 Device Capabilities ......... 3-68
3-9.3 Talking and Listening ....... 3-68
3-9.4 SRQ and Serial Poll Response .3-70
3-9.5 Device Clear And Selected
Device Clear Response ...... 3-70
3-10 POWER UP AND TESTING
CONSIDERATIONS .................
3-70
3-11 EEPROMCLEARING................ 3-71
4 GENERAL THEORY OF
OPERATION................... 4-1
4-1 INTRODUCTION ..................... 4-1
4-2 BLOCKDIAGRAMDISCUSSION. ....... 4-1
4-2.1 AC Receptacle /RFI Filter ...... 4-1
4-2.2 AC Line Filter ............... 4-1
4-2.3 Power Supply Module ......... 4-1
4-2.4 RF Analog Module ............ 4-1
4-2.4.1 Preselector .................. 4-1
4-2.4.2 First Mixer .................. 4-1
4-2.4.3 First IF Gain Control ......... 4-1
4-2.4.4 First LO Driver .............. 4-1
4-2.4.5 Second Mixer ................ 4-2
4-2.4.6 Second LO .................. 4-2
4-2.4.7 Third Mixer ................. 4-2
4-2.4.8 Third LO ................... 4-2
4-2.5 Synthesizer Module ........... 4-2
4-2.5.1 Control ..................... 4-2
4-2.5.2 Reference Frequency .......... 4-2
4-2.5.3 1st LO Generation ............ 4-2
4-2.5.4 2nd/3rd LO REF Generation .... 4-3
4-2.5.5 Audio ...................... 4-3
4-2.6 Digital Module. .............. 4-3
4-2.6.1 Control Section .............. 4-3
4-2.6.2 DSP Section ................. 4-4
4-2.7 Serial Bus (Optional) .......... 4-5
4-2.7.1 Serial Bus Remote Interface Board 4-5
4-2.7.2 Serial Bus Cable Assembly ..... 4-5
4-2.8 IEEE-488 Bus (Optional) ....... 4-5
4-2.8.1 IEEE-488 Remote Interface Board 4-5
4-2.8.2 IEEE-488 Cable Assembly ...... 4-5
4-2.9 Front Panel ................. 4-5
4-2.10 Main Adjustment Knob ........ 4-6
4-2.11 Keypad Board ............... 4-6
4-2.12 Display Module .............. 4-6
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CDR-3250/80 TECHNICAL MANUAL
iv Issue 2.2
TABLE OF CONTENTS - Cont.
Chapter Page Chapter Page
5 MAINTENANCE INSTRUCTIONS 5-1
Section I. PREVENTIVE
MAINTENANCE .......... 5-1
5-1 INTRODUCTION .................... 5-1
5-2 CLEANING AND LUBRICATION ...... 5-1
5-3 INSPECTION........................ 5-1
5-3.1 External Inspection ............. 5-1
5-3.2 Internal Inspection ............. 5-1
5-4 PERFORMANCEVERIFICATION ...... 5-1
5-4.1 Receiver Sensitivity ............. 5-2
5-4.2 Line Audio ................... 5-2
5-4.3 Reference Frequency ........... 5-2
5-4.3.1 Receiver Check ................ 5-3
5-4.3.2 TCXO Check .................. 5-3
Section II. CORRECTIVE
MAINTENANCE ........ 5-4
5-5 TROUBLESHOOTING ................ 5-4
5-5.1 Troubleshooting Philosophy ... 5-4
5-5.2 Built-In Tests. ............... 5-4
5-5.2.1 POST ..................... 5-4
5-5.2.2 BITE ...................... 5-4
5-5.2.3 BIT ....................... 5-5
5-5.3 Troubleshooting Procedure .... 5-5
5-5.3.1 Fault Identification .......... 5-5
5-5.3.2 Initial Checks ............... 5-5
5-5.3.3 Front Panel Display
Interpretation ............... 5-5
5-5.3.4 Signal Tracing .............. 5-5
5-6 SUBASSEMBLY REMOVAL AND
REPLACEMENT..................... 5-8
5-6.1 Synthesizer Module. ........... 5-8
5-6.2 RF Analog Module ............ 5-8
5-6.3 Power Supply Module ......... 5-8
5-6.4 AC Line Filter Board .......... 5-8
5-6.5 Digital Module ............... 5-8
5-6.6 Remote Control Board (optional) 5-9
5-6.7 Keypad Board ............... 5-9
5-6.8 Keypad. .................... 5-9
5-6.9 Display Module .............. 5-9
5-6.10 Power/VolumeKnob .......... 5-9
5-6.11 MainAdjustmentKnob ........ 5-9
5-6.12 OpticalShaftEncoder ........5-10
5-6.13 FanAssembly............... 5-10
5-6.14 Support Handles ............5-10
5-7 SOFTWARE UPLOADING .............5-10
6 PREPARATION FOR
RESHIPMENT ................. 6-1
6-1 INTRODUCTION. .................... 6-1
6-2 DISASSEMBLY AND REMOVAL ...... 6-1
6-3 PACKAGING ........................ 6-1
6-4 SHIPPING .......................... 6-1
7 STORAGE..................... 7-1
7-1 INTRODUCTION .................... 7-1
7-2 STORAGEENVIRONMENT ........... 7-1
7-3 PRESERVATION .................... 7-1
8 PARTSLIST ................... 8-1
8-1 INTRODUCTION. .................... 8-1
8-2 REPLACEABLEPARTSLISTING....... 8-1
ANNEX
A REMOTE CONTROL ONLY OPTION . . AN-1A
B DCPOWERSUPPLYOPTION ....... AN-1B
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 v
LIST OF ILLUSTRATIONS
Figure Page
1-1A CDR-3250 Front View ................................................... 1-0
1-1B CDR-3280 Front View ................................................... 1-0
2-1A CDR-3250 Rear View .................................................... 2-2
2-1B CDR-3280 Rear View .................................................... 2-2
2-2 PowerConnector(J1)PinDescriptions ...................................... 2-3
2-3 DigitalDataConnectorSignals............................................. 2-7
3-1 FrontPanelControlsandDisplay........................................... 3-2
3-2 ParameterEntryControlsandDisplay........................................ 3-3
3-3 NormalDisplay. ........................................................ 3-4
3-4 DataEntryDisplay....................................................... 3-4
3-5 MeterDisplay........................................................... 3-4
3-6 Meter/ISBDisplay. ...................................................... 3-4
3-7 SoftKeyMenusOverallFlowDiagram ...................................... 3-6
3-8 DwellTime/BridgeTimeRelationship...................................... 3-30
3-9 SerialBusMessageFormat............................................... 3-47
3-10 SerialBusCharacterFormat ............................................. 3-47
3-11 IEEE-488 Serial Poll Response Byte ....................................... 3-71
4-1 Digital Module DSP Firmware Functions ................................... 4-7
5-1 SignalTracingFlowChart ............................................... 5-7
FO-1A CDR-3250 Outline and Mounting Drawing .................................. FP-1
FO-1B CDR-3280 Outline and Mounting Drawing .................................. FP-3
FO-2 CDR-3250/80 Block Diagram ............................................. FP-5
FO-3 CDR-3250/80 Interconnect Diagram ....................................... FP-7
FO3.1 CDR-3250/80 DC Interconnect Diagram ............................. SeeAnnexB
FO-4 CDR-3250/80 Motherboard Schematic ..................................... FP-9
FO-5A CDR-3250 Replaceable Parts Locator Diagram .............................. FP-13
FO-5B CDR-3280 Replaceable Parts Locator Diagram .............................. FP-17
Annex Illustrations
AN-1 DIPCircuit-SwitchSettings ........................................... AN-1A
FO 3.1 CDR-3250/80 DC Interconnect Diagram .................................. AN-2B
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CDR-3250/80 TECHNICAL MANUAL
vi Issue 2.2
LIST OF TABLES
Table Page
1-1 CDR-3250/80 Specifications .............................................. 1-2
1-2 ItemsFurnished......................................................... 1-7
1-3 RecommendedToolsandTestEquipment(OrEquivalent)....................... 1-7
2-1 RearPanelConnections .................................................. 2-3
2-2 SerialRemoteControlBusConnector(J4)PinDescriptions...................... 2-4
2-3 IEEE-488 Remote Control Bus Connector (J4) Pin Descriptions .................. 2-6
2-4 DIGITALDATAConnector(J7)PinDescription .............................. 2-7
2-5 AUDIO Connector (J8) Pin Descriptions ..................................... 2-8
3-1 FrontPanelControlsAndDisplay .......................................... 3-2
3-2 ParameterEntryControls ................................................. 3-3
3-3 Serial Bus Interface Command Messages .................................... 3-50
3-4 Serial Bus Interface Status Messages ....................................... 3-50
3-5 RadioCommandandStatusMessages ...................................... 3-51
3-6 IEEE-488 Bus Management Signals ........................................ 3-69
3-7 IEEE-488 Bus Handshake Lines ........................................... 3-69
3-8 IEEE-488 Implemented Interface Capabilities ................................ 3-69
5-1 FaultDetectors ......................................................... 5-5
5-2 FrontPanelFaultMessages ............................................... 5-6
8-1 Replaceable Parts. ....................................................... 8-1
AN-1 RemoteControlOption-Differences..................................... AN-1A
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CDR-3250/80 TECHNICAL MANUAL
(blank)/1-0 Issue 2.2
Figure 1-1A CDR-3250 Front View.
Figure 1-1B CDR-3280 Front View.
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 1-1
CHAPTER 1
GENERAL DESCRIPTION
1-1 INTRODUCTION.
This chaptercontainsanequipmentdescription,equipment
supplied and required, storage data, tools and test
equipment, and a summary of safety precautions.
1-2 EQUIPMENT DESCRIPTION.
The CDR-3250 and CDR-3280 (figure 1-1) are multi-mode
digital signal processing (DSP) receivers with a frequency
range from 10 kHz to 30 MHz.
Thereceiversareoperationallysimilar,butpackaged in two
differentconfigurations. Thereceiverscontainindividually
shielded modules mounted in a 19 by 3½-inch rack-mount
chassis (CDR-3250), or 8½ by 3½-inch desktop chassis
(CDR-3280). Two CDR-3280 receivers may be fastened
together (using an optional dual rack-mount kit) to
construct a standard 19-inch rack-mount configuration.
The receivers are controlled by a 19-button keypad and
main adjustment knob used to select the receiver
parameters. Five "soft keys" work in conjunction with the
vacuumfluorescent digital display immediately above the
soft keys.
In addition to soft key selections, the vacuum fluorescent
digitaldisplayprovidesavarietyofdataincludingchannel,
mode, BFO setting, frequency, bandwidth, gain,
local/remote control, an RF level meter, an AF level meter,
and a FREQ meter. Additional information is displayed
depending on soft key selections.
By proper selection of parameters, the receivers can detect
awide variety of signals. These include: amplitude
modulation (AM), on/off keyed (CW), upper sideband
(USB), lower sideband (LSB), independent sideband (ISB)
(suppressed carrier and independent), and frequency
modulation (FM). Frequencyshiftkeyed(FSK)signalscan
be demodulated as single sideband suppressed carrier
signals or as true FM signals.
The selected detector audio output is available on the
NORM 600-ohm balanced line, rear panel speaker
connection, or front panel PHONES jack. In all modes
except ISB, the FM detector output is available as a DC-
coupled video signal on a single-ended line. In ISB mode
the USB signal appears on the NORM audio output, while
the LSB signal appears on the ALT audio 600-ohm line. In
all other demodulation modes, the AM detector output
appears attheALTaudio output. Thisoutputmaybeused
for multiplexed direction-finding (DF) signal processors.
APHONESjackonthe front panel providesforconnection
of an external speaker, or headphones. The audio level is
controlled by the front panel power/volume control. The
correct audio is automatically selected depending on the
receive mode. However, when the ISB receive mode is
selected, the operatormust select either the normal (USB)
or alternate (LSB) audio for application to the jack.
Either an internal or external reference frequency may be
used. The external reference frequency is automatically
sensed and used when connected to the rear panel.
The receivers may be remotely controlled (optional) by a
companion RCU-3100 remote control unit (optional with
serial bus only) or by any suitable bus controller using
eitheran RS-232, or RS-422 serial interface bus, or an IEEE-
488 parallel interface bus.
1-3 SPECIFICATIONS.
Refer to table 1-1 for specifications of the equipment.
1-4 EQUIPMENT FURNISHED.
Table 1-2 lists the items furnished, and optional items.
1-5 STORAGE DATA.
Refer to Chapter 7 for storage data.
1-6 TOOLS AND TEST EQUIPMENT.
Table 1-3 lists recommended tools and test equipment for
operational level maintenance. There are no special tools
or test equipment required.
1-7 SAFETY PRECAUTIONS.
Safety precautions are presented in this manual preceded
by the word WARNING or CAUTION just prior to the
point where the hazard is likely to be encountered.
Warnings and cautions are defined as follows:
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CDR-3250/80 TECHNICAL MANUAL
1-2 Issue 2.2
WARNING CAUTION
Refers to a procedure or practice that, if not
correctly followed,couldresultininjury,death,
or long term health hazard.
Refers to a procedure or practice that, if not
correctly followed, could result in equipment
damage or destruction.
Table 1-1 CDR-3250/80 Specifications.
Item Specification
FREQUENCY
Tuning Range 10 kHz - 30 MHz
Resolution 1 Hz
Tuning Steps Adjustable 1 Hz through 10 MHz
Internal Reference
Frequency Stability 1 ppm over temperature (standard TCXO). 0.1 ppm over temperature (optional high-performance OCXO).
External Reference Frequency 10 MHz (Automatically switches to external reference when external reference
signal is applied)
Synthesizer Lock Time 3 ms typical, 6 msec maximum
DETECTION MODES LSB, USB, ISB, CW, AM, FM, FSK
DISPLAY Full graphics vacuum fluorescent display
SCAN & SWEEP
Channels 250 programmable channels stored in nonvolatile memory
Scan Up to 250 channels
Sweep f1 to f2 at selected steps. Up to 125 frequency bands programmable
Rate 1 - 100 channels/second
Adjustable Threshold -112 to 0 dBm in 1/2 dB increments
RF SECTION
Antenna Impedance 50 ohms
Antenna VSWR Less than 3:1
Sensitivity for 10 dB
SINAD (above 1.6 MHz). AM (6 kHz BW 50% modulation): min. -105 dBm. FM (16 kHz BW 5 kHz dev. 400 Hz modulation, 20 dB sinad): -98 dBm.
CW (500 Hz BW): min. -122 dBm.
SSB (3 kHz BW): min. -113 dBm.
Protection 50 dB reflective attenuation. Activates at signal levels between +10 dBm and +20
dBm. Protects from input signals of levels up to 10 Watts.
Preselection Eight suboctave bandpass preselector filters used from 1.6 to 30 MHz.
Frequencies below 1.6 MHz are selected by two lowpass filters. Filter selection is
automatic with tuned frequency selection.
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 1-3
Table 1-1 CDR-3250/80 Specifications-Cont.
Item Specification
GAIN CONTROL Automatic (AGC) or Manual (MGC)
AGC
Dynamic Range Output held within 1 dB over a 110 dB range
AGC Threshold -112 dBm (Output level -3 dB with respect to a -60 dBm signal)
AGC Attack Time
(SSB & CW) Automatically selected
Fast < 2 ms for 50 dB change (sweep/scan only)
Normal < 10 ms for 50 dB change (product detector modes)
AGC Decay Time 20 ms to 4 seconds nominal for 50 dB change
AGC for AM or FM mode Carrier derived average detection with 50 ms response time for 50 dB change
MGC
Control Range 0 to 127.5 dB (nominal) gain reduction in 0.5 dB steps.
IF SECTION
1st IF 40.456 MHz. Standard Filter BW = 22.5 kHz
2nd IF 456 kHz. Standard Filter BW = 30 kHz
3rd IF
(cont)
24 kHz, Lowpass filter @ 80 kHz
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CDR-3250/80 TECHNICAL MANUAL
Table 1-1 CDR-3250/80 Specifications-Cont.
Item Specification
1-4 Issue 2.2
4th IF (DSP) 51 selectable bandwidths (100 Hz to 16 kHz).
Bandwidths are effective bandpass filter bandwidths at the 3 dB down points.
Shape factor is 3 dB to 60 dB (Better than 2:1, 400 Hz and above). Inband ripple is
1 dB max.
Standard selectable bandwidths are as follows:
No. BW (Hz) No. BW (Hz)
0 100 26 2100
1 150 27 2200
2 200 28 2300
3 250 29 2400
4 300 30 2500
5 350 31 2600
6 400 32 2700
7 450 33 28001
8 500 34 2900
9 550 35 3000
10 600 36 3100
11 650 37 3200
12 700 38 3300
13 800 39 3400
14 900 40 3500
15 1000 41 4000
16 1100 42 5000
17 1200 43 6000
18 1300 44 70002
19 1400 45 80002
20 1500 46 90002
21 1600 47 100002
22 1700 48 120002
23 1800 49 140002
24 1900 50 160002
25 2000
1ISB mode restricted to 2800 Hz BW only.
2Bandwidths from 7 kHz to 16 kHz are available in AM or FM only.
INTERFERENCE IMMUNITY
IF Rejection 100 dB minimum
Image Rejection 100 dB minimum
Cross Modulation Unmodulated wanted signal of -60 dBm together with a modulated (30% AM at 1
kHz) unwanted signal of -10 dBm spaced 100 kHz apart will produce less than 10%
cross modulation of wanted signal.
Blocking Attenuation of a wanted RF signal of -60 dBm and caused by an unmodulated
signal of +10 dBm spaced 100 kHz away is less than 3 dB.
Oscillator Reradiation -110 dBm, up to 1 GHz from receiver antenna connector into 50 ohms.
Spurious Responses -120 dBm equivalent or less for -50 dBm input signals
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CDR-3250/80 TECHNICAL MANUAL
Table 1-1 CDR-3250/80 Specifications-Cont.
Item Specification
Issue 2.2 Change 2 1-5
Generated Spurious Above 0.14 MHz, two at no more than -110 dBm. All others less than -120 dBm
Intermodulation Distortion:
2nd-order Input intercept point of +40 dBm (+55 dBm above 1.6 MHz with 2600-1107-2 RF
Analog module )
3rd-order Input intercept point of +30 dBm
OUTPUTS
WBIF Wideband IF, 456 kHz, 20 kHz min. BW
NBIF (analog) Narrowband IF reconstructed from I & Q equal to selected bandwidth,
455 kHz, -10 dBm ± 3 dB over dynamic range
Third IF (digital) I & Q outputs from DSP
Video Demodulated FM, 500mV peak to peak into 75 ohms (deviation equal to 30% of
selected bandwidth)
FSK Provides RS232 compatible output
C.O.R. NORM and ALT Carrier Operated Relay signals
Audio Line Output
(Normal) 600 ohms balanced pair on audio connector short circuit protected, less than 3% distortion at rated output, (FM mode only with de-emphasis on).
AM, CW, LSB, USB, ISB: 0 dBm ±3 dB (Normal audio is the USB when ISB mode
is selected).
FM: 0.5 V/kHz AC coupled (4V p-p max.)
Audio Line Output
(Alternate) 600 ohms balanced pair on audio connector short circuit protected, less than 3% distortion at rated output, (FM mode only with de-emphasis on). 0 dBm ±3 dB.
(Alternate audio is the LSB when ISB mode is selected)
PHONES 0 to 2V p-p, 8 ohm load impedance to front panel phone jack. Short circuit
protected. Speaker output in parallel to rear panel audio connector.
Reference 10 MHz , 0 dBm, 50 ohms nominal.
INPUTS
Synthesizer Reference 10 MHz external standard, 0 dBm, 50 ohms
Antenna 50 ohms nominal
GENERAL DATA
Power Requirements 90 - 260 VAC 47 - 440 Hz, 60 watts, switching mode power supply
Dimensions CDR-3250 - 19" (48.2 cm) wide, 3.5" (8.9 cm) high, 22.03 (55.95 cm) deep
CDR-3280 - 8.45" (2.17 cm) wide, 3.5" (8.9 cm) high, 22.25" (57.05 cm) deep
Weight CDR-3250 - Approx 21.8 lbs. (9.9 kg) (Unpackaged)
CDR-3280 - Approx 16.0 lbs. (7.25 kg) (Unpackaged)
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CDR-3250/80 TECHNICAL MANUAL
Table 1-1 CDR-3250/80 Specifications-Cont.
Item Specification
1-6 Issue 2.2
ENVIRONMENTAL DATA
Temperature Range 0 to +50°C Operating, -40 to +85°C Storage.
OPTIONS
RCU-3100 Remote Controller (Serial bus option must be installed). Controls up to 10 receivers, expandable to
100 receivers. Line audio handling up to 10 receivers.
High-performance reference
oscillator OCXO, 0.1 ppm of tuned frequency
Serial Data Bus RS-232 or RS-422
Parallel Data Bus IEEE-488
Rack-Mount Slides Slides for CDR-3250 for installation into 19-inch rack.
Dual Rack Mount Kit Hardware and slides to fasten two CDR-3280 receivers together for installation in
standard 19-inch rack
DC Power 20-32 VDC. 3A maximum
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 1-7/(1-8 blank)
Table 1-2 Items Furnished.
Part No. Nomenclature Furn./Optl.
260001-XX1CDR-3250 or CDR-3280 VLF - HF Digital Receiver Furn.
696-012 AC power cord Furn.
2600-1021-1 Technical manual Furn.
2600-1009-1 Rack Mount Kit, Dual (for CDR-3280 only) Optl. Not furnished
222-088 Mounting slides for rack mount (for CDR-3250 only) Optl. Not furnished
222-026 Mounting brackets for slides Optl. Not furnished
324-009/324-010 Audio Connector/Hood (cable end) Optl. Not furnished
324-070/324-010 Digital Data Connector/Hood (cable end) Optl. Not furnished
1XX indicates model number and factory installed options. Refer to identification plate on equipment.
Table 1-3 Recommended Tools and Test Equipment (Or Equivalent).
Part No. Nomenclature Manufacturer
-Screwdriver, Phillips 6 inch, No. 1 Any
-Screwdriver, Phillips 6 inch, No. 2 Any
-Driver, nut, 1/4 inch Any
-Wrench, open end, 3/16 inch Any
-Wrench, Allen, .050 inch Any
-Wrench, Allen, 1/16 inch Any
-Wrench, Allen, 7/64 inch Any
HP8642B RF signal generator Hewlett Packard
465B Oscilloscope Tektronix
8050A Digital multimeter (true RMS) Fluke
HP5381A Frequency counter1Hewlett Packard
HP8568B Spectrum analyzer1Hewlett Packard
1Optional
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 2-1
WARNING
CAUTION
CHAPTER 2
PREPARATION FOR USE AND INSTALLATION INSTRUCTIONS
2-1 INTRODUCTION.
This chapter contains unpacking, inspection, installation,
connections, and initial alignment procedures.
2-2 UNPACKING AND INSPECTION.
Tounpackandinspectthereceiverfordamage,performthe
following procedures:
Do not drop the equipment when lifting or
carrying. Personnel injury or equipment
damage may occur.
1. Inspect the shipping carton for damage before
unpacking the receiver.
NOTE
If the carton is damaged, open the carton in
the presence of a shipping carrier agent if
possible. If damage is found after the
receiver is unpacked, retain the carton and
packing materials for inspection.
2. Open the carton and remove the foam packing
material on top of the receiver.
3. Lift the receiver from the carton.
NOTE
Save carton for possible reshipment.
4. Inspectthereceiverforexternaldamageincluding
dents and scratches.
Do not attempt to operate the receiver if
major damage is found.
2-3 INSTALLATION.
The receiver is designed for 19-inch rack mount (CDR-
3250)ordesktop (CDR-3280) operationinarelativelydust
free environment with an ambient temperature range
between 0and+50oC. Optional slides maybeprovidedfor
the CDR-3250. Follow the instructions provided with the
slides for installation. An optional dual rack mount kit is
available for the CDR-3280 to mount two units into a
standard 19-inch rack. No special tools or additional
materials are required for installation.
NOTE
See figure FO-1A (CDR-3250) and FO-
1B (CDR-3280) for clearance re-
quirements and mounting details.
2-4 CONNECTIONS.
Refer to table 2-1 and connect the antenna, power cable,
andoptionalequipmenttotheunit.(Seefigure2-1A(CDR-
3250) and 2-1B (CDR-3280)).
NOTE
Refer to the RCU-3100 Technical Manual
if the RCU-3100 remote controller is used.
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CDR-3250/80 TECHNICAL MANUAL
2-2 Issue 2.2
Figure 2-1A CDR-3250 Rear View.
Figure 2-1B CDR-3280 Rear View.
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CDR-3250/80 TECHNICAL MANUAL
Issue 2.2 2-3
GROUND
(GREEN)
NEUTRAL
(WHITE)
HOT
(BLACK)
Table 2-1 Rear Panel Connections.
Name Connector
On Unit Recommended Mating Type Description
POWER (J1) IEC 320-C-13
(343-002) NEMA 5-15P (696-012, Power Cord) 90 to 260 VAC, 47 to 440 Hz, single phase 60 watts max. Figure 2-2 shows the pin descriptions.
REF IN (J2) BNC Jack
(344-246) BNC Plug (Customer Option) Reference frequency in. Used to connect 10 MHz external frequency standard. 50 ohms, 0 dBm.
REF OUT (J3) BNC Jack
(344-246) BNC Plug (Customer Option) Reference frequency out. Used to connect to other receivers or equipment using the same reference frequency standard.
If external reference is used, this signal is the same as
applied to the REF IN connector. 50 ohms, 0 dBm.
SERIAL REMOTE
CONTROL (J4)
(Opt)
25-pin female D sub-
miniature connector. 25-pin male D subminiature connector.
(Customer Option)
(Optional daughter board in Digital module, and cable
assembly must be installed). For external RS-232C or RS-
422 remote control bus operation. Table 2-2 lists the pin
descriptions. Refer to para 3-7.5.2.2.1 to set the serial bus
configuration.
IEEE-488 REMOTE
CONTROL (J4)
(Opt)
IEEE-488 24-pin
"blue ribbon"
connector assy.
Standard IEEE-488 24-pin
connector.
(Customer Option)
(Optional daughter board in Digital module, and cable
assembly must be installed). For external remote control bus
operation. Table 2-3 lists the pin descriptions. Refer to para
3-7.5.2.2.2 to set the IEEE-488 bus address.
ANTENNA (J5) BNC Jack
(344-246) BNC Plug (Customer Option) Coaxial antenna connection. Impedance is approximately 50 ohms with a VSWR less than 3 to 1 at the receiver tuned
frequency.
NBIF (J6) BNC Jack
(344-246) BNC Plug (Customer Option) Narrowband IF output signal. Centered at 455 kHz with a bandwidth equal to the selected bandwidth. This output may
be connected to a spectrum analyzer or other equipment.
The signal level is -10 dBm.
DIGITAL DATA (J7) 15-pin "D"
subminiature male
(324-009)
15-pin "D" subminiature
female (324-070) Used to connect I & Q outputs to external digital signal processing equipment. Table 2-4 lists the pin descriptions.
Figure 2-3 shows the timing relationship.
AUDIO (J8) 15-pin "D"
subminiature female
(324-070)
15-pin "D" subminiature
male
(324-009)
Used to connect audio to optional RCU-3100 remote
controller or other equipment. Table 2-5 lists the pin
descriptions.
WBIF (J9) BNC Jack
(344-246) BNC Plug (Customer Option) Wideband IF (WBIF) output signal. Centered at 456 kHz (with a bandwidth of 30 kHz). This output may be connected
to a spectrum analyzer or other equipment. For input signal
levels between 0 and -60 dBm, the WBIF signal level is -30
dBm. For input signal levels below -60 dBm, the gain at the
WBIF output is approximately 30 dB.
NOTE: Part numbers in parenthesis (000-000) indicate CCI part number if applicable.
Figure 2-2 Power Connector (J1) Pin Descriptions.
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