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Cubic Communications CDR-3250 Technical Manual

Operational level, receiver, digital signal processing, single, vlf-hf
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OPERATION AND MAINTENANCE INSTRUCTIONS
DIGITAL SIGNAL PROCESSING,
Courtesy of http://BlackRadios.terryo.org
TECHNICAL MANUAL
OPERATIONAL LEVEL
RECEIVER,
SINGLE,
VLF - HF
CDR-3250
&
CDR-3280
Cubic Communications, Inc.
9535 Waples Street
San Diego, California 92121-2953
Telephone: (858) 643-5800
Manual Part No. 2600-1021-1
Telefax: (858) 643-5803

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  • Page 1 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: (858) 643-5800 Telefax: (858) 643-5803 Manual Part No. 2600-1021-1 Courtesy of http://BlackRadios.terryo.org...
  • Page 2 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: (858) 643-5800 Telefax: (858) 643-5803 Manual Part No. 2600-1021-1 Issue 2.2 24 December 1998 Change 2 2 March 2001 Courtesy of http://BlackRadios.terryo.org...
  • Page 3 CDR-3250/80 TECHNICAL MANUAL RECORD OF CHANGES CHANGE DATE TITLE OF BRIEF DESCRIPTIONS ENTERED BY 12 Aug 99 Engineering update. Page changes are as follows: CCI Eng. Dept. Title Page, Record of Changes, ii & 3-1. 2 March 01 DCR 730428: Update Generated Spurious data in CCI Eng.
  • Page 4 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.

  • Page 5: Table Of Contents

    CDR-3250/80 TECHNICAL MANUAL TABLE OF CONTENTS Chapter Page Chapter Page SETTING OR CHANGING RECEIVER GENERAL DESCRIPTION ..PARAMETERS ..... . .
  • Page 6 CDR-3250/80 TECHNICAL MANUAL TABLE OF CONTENTS - Cont. Chapter Page Chapter Page Section II. REMOTE CONTROL ..3-46 4 GENERAL THEORY OF OPERATION ....
  • Page 7 CDR-3250/80 TECHNICAL MANUAL TABLE OF CONTENTS - Cont. Chapter Page Chapter Page SUBASSEMBLY REMOVAL AND 5 MAINTENANCE INSTRUCTIONS REPLACEMENT .....
  • Page 8 CDR-3250 Outline and Mounting Drawing ........FP-1...
  • Page 9 CDR-3250/80 Specifications ........
  • Page 10 CDR-3250/80 TECHNICAL MANUAL Courtesy of http://BlackRadios.terryo.org (blank)/1-0 Issue 2.2...

  • Page 11: General Description

    However, when the ISB receive mode is selected, the operator must select either the normal (USB) The CDR-3250 and CDR-3280 (figure 1-1) are multi-mode or alternate (LSB) audio for application to the jack. digital signal processing (DSP) receivers with a frequency range from 10 kHz to 30 MHz.
  • Page 12 Refers to a procedure or practice that, if not correctly followed, could result in injury, death, correctly followed, could result in equipment or long term health hazard. damage or destruction. Table 1-1 CDR-3250/80 Specifications. Item Specification FREQUENCY Tuning Range 10 kHz - 30 MHz...
  • Page 13 CDR-3250/80 TECHNICAL MANUAL Table 1-1 CDR-3250/80 Specifications-Cont. Item Specification GAIN CONTROL Automatic (AGC) or Manual (MGC) 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)
  • Page 14 CDR-3250/80 TECHNICAL MANUAL Table 1-1 CDR-3250/80 Specifications-Cont. Item Specification 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.
  • Page 15 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.
  • Page 16 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.
  • Page 17 CDR-3250/80 TECHNICAL MANUAL Table 1-2 Items Furnished. Part No. Nomenclature Furn./Optl. 260001-XX CDR-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...

  • Page 18: Preparation For Use And Installation Instructions

    0 and +50 C. Optional slides may be provided for 2-2 UNPACKING AND INSPECTION. the CDR-3250. Follow the instructions provided with the slides for installation. An optional dual rack mount kit is To unpack and inspect the receiver for damage, perform the...
  • Page 19 CDR-3250/80 TECHNICAL MANUAL Courtesy of http://BlackRadios.terryo.org Issue 2.2...
  • Page 20 CDR-3250/80 TECHNICAL MANUAL Table 2-1 Rear Panel Connections. Name Connector Recommended Description On Unit Mating Type POWER (J1) IEC 320-C-13 NEMA 5-15P 90 to 260 VAC, 47 to 440 Hz, single phase 60 watts max. (343-002) (696-012, Power Cord) Figure 2-2 shows the pin descriptions.
  • Page 21 CDR-3250/80 TECHNICAL MANUAL Table 2-2 Serial Remote Control Bus Connector (J4) Pin Descriptions. Signal Remarks Transmitted Data RS-232 Received Data RS-232 Request to Send RS-232 Clear to Send RS-232 Signal Ground RS-232 Request to Send A RS-422 Request to Send B...
  • Page 22 30 receivers for RS-422 operation. Dual chassis models count as two receivers. The input resistance of the RS-232 line receivers is approximately 5000 Ohms. The CDR-3250/80 receiver contains no termination resistors for the RS-422 bus. If connected directly to a computer interface also configured as DTE, a reversal of transmit and receive data (TXD and RXD or SD and RD) and request to send and clear to send (RTS and CTS or RS and CS) lines may be necessary.
  • Page 23 CDR-3250/80 TECHNICAL MANUAL Table 2-3 IEEE-488 Remote Control Bus Connector (J4) Pin Descriptions. Signal Remarks Data Bit 1 Data Bit 2 Data Bit 3 Data Bit 4 End Or Identify (Bus management) Data Valid (Handshake) NRFD Not Ready For Data (Handshake)
  • Page 24 CDR-3250/80 TECHNICAL MANUAL Table 2-4 DIGITAL DATA Connector (J7) Pin Description. Signal Remarks SERCLK (-) Serial clock inverted (0 to +5V) SERCLK (+) Serial clock (0 to +5V) Ground FRSYNC (-) Frame sync inverted (0 to +5V) FRSYNC (+) Frame sync (0 to +5V)
  • Page 25 CDR-3250/80 TECHNICAL MANUAL Table 2-5 AUDIO Connector (J8) Pin Descriptions. Signal Remarks NORM BAL AUDIO 600 ohms balanced pair NORM BAL RTN ALT BAL AUDIO 600 ohms balanced pair ALT BAL RTN VIDEO RTN (GND) SPKR AUDIO 4 ohms or greater SPKR RTN (GND) NORM C.O.R.

  • Page 26: Operating Instructions

    CDR-3250/80 TECHNICAL MANUAL CHAPTER 3 OPERATING INSTRUCTIONS Section I. LOCAL CONTROL approximate reading on the meter while the center of the 3-1 INTRODUCTION. meter shows a numeric reading. Each meter is described This chapter contains both local (manual) and remote below.
  • Page 27 CDR-3250/80 TECHNICAL MANUAL Figure 3-1 Front Panel Controls and Display. Table 3-1 Front Panel Controls And Display. Control Function Vacuum Fluorescent Display Provides display of receiver parameters and other data to the operator. Main Adjustment Knob Provides analog adjustment of parameters using optical digital encoder on shaft of knob.
  • Page 28 CDR-3250/80 TECHNICAL MANUAL Figure 3-2 Parameter Entry Controls and Display. Table 3-2 Parameter Entry Controls. Control Function LOC/REM Key Pressing the LOC/REM key selects either local (manual) or remote control of the receiver. When the desired control mode is selected CTRL:LOCAL or CTRL:REMOTE is displayed in the lower center of the vacuum fluorescent display.
  • Page 29 CDR-3250/80 TECHNICAL MANUAL Figure 3-3 Normal Display. Figure 3-4 Data Entry Display. Figure 3-5 Meter Display. Figure 3-6 Meter/ISB Display. Courtesy of http://BlackRadios.terryo.org Issue 2.2...

  • Page 30: Power On And Initial Set Up

    CDR-3250/80 TECHNICAL MANUAL 3-3 POWER ON AND INITIAL SET UP. 3-6 NORMAL OPERATION. To turn on and initially set up the receiver do the Receiver functions are set or changed by watching the front following: panel display, while using the keypad (and/or main adjustment knob) to select and enter the parameters.
  • Page 31 CDR-3250/80 TECHNICAL MANUAL Figure 3-7 Soft Key Menus Overall Flow Diagram (Sheet 1 of 3). Courtesy of http://BlackRadios.terryo.org Issue 2.2...
  • Page 32 CDR-3250/80 TECHNICAL MANUAL SCAN/SWEEP SOFT KEY MENU SCAN SWEEP STEP DWELL BRIDGE ENTER CANCEL RATE RATE BKSP ENTER CANCEL FROM OFFSET SWEEP DONE STOP CONT SKIP RETURN BKSP ENTER RETURN BKSP ENTER RETURN NEXT RATE SWEEP DONE BKSP ENTER RETURN...
  • Page 33 CDR-3250/80 TECHNICAL MANUAL UTILITY SOFT KEY MENU TEST CONFIG FAULTS SYSTEM ABOUT INTENS SOUND MENUS CANCEL MENUS METERS CANCEL CLICK BEEP DONE RETURN 62.5% 87.5% 100% DONE NEXT 12.5% DONE NEXT MEMORY ADDRS DONE ENTER CANCEL NEXT ENTER CANCEL CURNT...

  • Page 34: 3-7.1 Basic Soft Key Menus

    CDR-3250/80 TECHNICAL MANUAL 3-7.1 Basic Soft Key Menus. Four basic soft key menus can be displayed; primary, secondary, scan/sweep, and utility. Each menu is described below. Primary Soft Key Menu. This menu is displayed after power up and completion of POST testing.
  • Page 35 CDR-3250/80 TECHNICAL MANUAL 3-7.2 Primary Soft Key Menu. The following paragraphs detail the primary soft key menu parameter entries. 3-7.2.1 Frequency. This function sets or changes the receiver frequency. Primary Soft Key Menu. FREQ MODE SQELCH GAIN NEXT Press the FREQ key to adjust the receive frequency. The following menu appears.
  • Page 36 CDR-3250/80 TECHNICAL MANUAL MODE Soft Key Menu. CANCEL NEXT Press the desired receive mode, or press the NEXT key and the following menu appears. MODE - NEXT Soft Key Menu. CANCEL NEXT Press the desired receive mode, or press the NEXT key to show the previous menu.
  • Page 37 CDR-3250/80 TECHNICAL MANUAL MODE - NEXT Soft Key Menu. CANCEL NEXT When FSK is selected, the following menu appears. MODE - NEXT - FSK Soft Key Menu. VNAR WIDE CANCEL NEXT Press the desired FSK shift value where VNAR = 50 Hz, NAR = 85 Hz, MED = 170 Hz, and WIDE = 850 Hz.
  • Page 38 CDR-3250/80 TECHNICAL MANUAL BW - NEXT - TABLE Soft Key Menu. ASSIGN DEFLT ENTER CANCEL NEXT When the TABLE key is pressed BW: XXX is shown in the display. Rotate the main adjustment knob to select and change one of fifty-one bandwidths from 100 Hz to 16.0 kHz (or 6.0 kHz) depending on receive mode. After the desired bandwidth is displayed, press the ENTER key to enter the receiver bandwidth and exit the Bandwidth menu.
  • Page 39 CDR-3250/80 TECHNICAL MANUAL 3-7.2.3.2 Assigning Default Bandwidths To Receive Modes. Bandwidths may be assigned to receive modes as default settings using the DEFLT function. To assign the bandwidths select the BW - NEXT - TABLE soft key menu as shown below. Rotate the main adjustment knob to select the desired bandwidth as shown in the display.
  • Page 40 CDR-3250/80 TECHNICAL MANUAL 3-7.2.5 Gain. This function sets or changes the receiver gain control mode or selects the AGC decay time. NOTE Gain soft key selections are different depending on receive mode selected. AGC decay time is fixed in both AM and FM modes at 0.05 seconds.
  • Page 41 CDR-3250/80 TECHNICAL MANUAL GAIN Soft Key Menu. 0.02* 0.20* 3.00* CANCEL NEXT Press the desired AGC decay setting, or press the NEXT key for more settings. GAIN - NEXT Soft Key Menu. 0.10* 0.60* 1.00* TABLE CANCEL NEXT Press the desired AGC decay setting, or press the TABLE key for more settings.
  • Page 42 CDR-3250/80 TECHNICAL MANUAL 3-7.2.5.1 Assigning AGC Decay Time Values to Soft Key Labels. The AGC soft key labels may be assigned different values from the AGC table using the ASSIGN function. To assign the AGC labels, select the GAIN - NEXT - TABLE soft key menu as shown below.
  • Page 43 CDR-3250/80 TECHNICAL MANUAL 3-7.2.5.2 Assigning Default AGC Values To Receive Modes. AGC values may be assigned to receive modes as default settings using the DEFLT function. To assign the AGC values, select the GAIN - NEXT - TABLE soft key menu as shown below.
  • Page 44 CDR-3250/80 TECHNICAL MANUAL 3-7.3.2 IF Shift. This function can only be set in the CW reception mode and is used to shift the bandpass up or down from the displayed frequency. This function helps reduce reception of unwanted adjacent signals.
  • Page 45 CDR-3250/80 TECHNICAL MANUAL STORE Soft Key Menu. BKSP ENTER CANCEL NEXT Select a memory channel to store current parameters using the numeric keys or main adjustment knob. Press the ENTER key when the desired channel is displayed. Range = 000 to 249.

  • Page 46: 3-7.4 Scan/Sweep Soft Key Menu

    CDR-3250/80 TECHNICAL MANUAL 3-7.4 Scan/Sweep Soft Key Menu. The following paragraphs detail parameter entry from the sweep/scan soft key menu. To display the sweep/scan soft key menu, press the NEXT key from the secondary soft key menu. 3-7.4.1 Scan. NOTE...
  • Page 47 CDR-3250/80 TECHNICAL MANUAL Scan/Sweep - SCAN Soft Key Menu. FROM OFFSET SCAN DONE NEXT Press the TO key and the following menu appears. Scan/Sweep - SCAN - TO Soft Key Menu. BKSP ENTER RETURN NEXT Select the desired ending channel using the keypad or main adjustment knob, and press ENTER. The menu will switch back to the Scan/Sweep - SCAN menu as shown below.
  • Page 48 CDR-3250/80 TECHNICAL MANUAL Scan/Sweep - SCAN - NEXT Soft Key Menu. RATE SCAN DONE NEXT Press the RATE key to change the scan rate, and the following menu appears. Scan/Sweep - SCAN - NEXT - RATE Soft Key Menu. BKSP...
  • Page 49 CDR-3250/80 TECHNICAL MANUAL 3-7.4.2 Sweep. NOTE Before performing a sweep function, frequencies and other parameters to be sampled should be determined and set into designated memory channels. Sweep is the sequential stepping of the receiver frequency between a designated frequency in a FROM memory channel to the designated frequency in a TO memory channel.
  • Page 50 CDR-3250/80 TECHNICAL MANUAL Multi-Band Sweep. In a multi-band sweep the TO channel is higher than the next higher numerical channel above the FROM channel. Frequencies between the FROM channel and the next higher odd channel will be swept like the single-band sweep.
  • Page 51 CDR-3250/80 TECHNICAL MANUAL To start and stop the sweep function, do the following: Scan/Sweep Soft Key Menu. SCAN SWEEP STEP DWELL BRIDGE NEXT Press the SWEEP key and the following menu appears. Scan/Sweep - SWEEP Soft Key Menu. FROM OFFSET...

  • Page 52: Sweep

    CDR-3250/80 TECHNICAL MANUAL Scan/Sweep - SWEEP Soft Key Menu. FROM OFFSET SWEEP DONE NEXT Press OFFSET (if desired) to offset the sweep squelch level during the sweep. The receiver adds the offset value to the squelch level setting for each even channel in the sweep. The following menu appears if OFFSET is selected.
  • Page 53 CDR-3250/80 TECHNICAL MANUAL Scan/Sweep - SWEEP Soft Key Menu. FROM OFFSET SWEEP DONE NEXT Press the SWEEP key to start the sweep. The receiver will sweep the band or bands of frequencies between the FROM and TO channel frequencies using the parameters set in the FROM channel. The following menu appears.

  • Page 54: Step

    CDR-3250/80 TECHNICAL MANUAL 3-7.4.4 Dwell. The dwell time setting is the time duration (in seconds) the receiver remains on a channel or frequency that has exceeded the squelch level. This function is only used in the scan or sweep function. If the dwell time is set to zero, and the signal exceeds the squelch level, the receiver will stay on this channel or frequency until the signal falls below the squelch level.
  • Page 55 CDR-3250/80 TECHNICAL MANUAL DWELL = 0 SEC. BRIDGE = 0 SEC. SIGNAL RECEIVER CONTINUES SWEEP OR SCAN DWELL = 0 SEC. BRIDGE = 2 SEC. SIGNAL BRIDGE TIME RECEIVER CONTINUES SWEEP OR SCAN DWELL = 2 SEC. BRIDGE = 0 SEC.

  • Page 56: 3-7.4.5 Bridge

    CDR-3250/80 TECHNICAL MANUAL 3-7.4.5 Bridge. (See figure 3-8.) The bridge time function may be used to monitor intermittent signals. This function supplements the dwell time function by causing the receiver to stay on frequency longer than the preset dwell time during sweep or scan.

  • Page 57: 3-7.5.2 Configuration

    CDR-3250/80 TECHNICAL MANUAL Utility - TEST Soft Key Menu. BITE DSPLY CANCEL NEXT Press the DSPLY soft key to select the front panel display test. After the test is complete, press any soft key when prompted. The normal display will be shown with the primary soft key menus.
  • Page 58 CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG - INIT Soft Key Menu. CHNL SKIP MDFLTS SFLBLS CANCEL NEXT Press CHNL to initialize (clear) the memory channels and change them to factory default settings. The following menu appears. Utility - CONFIG - INIT - CHNL Soft Key Menu.
  • Page 59 CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG - INIT Soft Key Menu. CHNL SKIP MDFLTS SFLBLS CANCEL NEXT Press MDFLTS to reset the mode default setting for BW and AGC to initial values. The following menu appears. Utility - CONFIG - INIT - MDFLTS Soft Key Menu.

  • Page 60: Configuring Receiver Remote Control Operation

    CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG - INIT - NEXT Soft Key Menu. MGC MD CANCEL NEXT Press the ALL key to reset all non-volatile memory values to default settings. Utility - CONFIG - INIT - NEXT - ALL Soft Key Menu.
  • Page 61 CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG Soft Key Menu. INIT REMOTE PWRDWN ROLOFF CANCEL NEXT Press REMOTE to change the remote control bus configuration. The following menu appears. Utility - CONFIG - REMOTE Soft Key Menu. ADDRS TYPE RATE BITS...
  • Page 62 CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG - REMOTE Soft Key Menu. ADDRS TYPE RATE BITS DONE NEXT Press the RATE key to change the serial bus rate. The following menu appears. Utility - CONFIG - REMOTE - RATE Soft Key Menu.
  • Page 63 CDR-3250/80 TECHNICAL MANUAL DATA BITS STOP BIT PARITY EVEN EVEN EVEN EVEN Utility - CONFIG - REMOTE Soft Key Menu. ADDRS TYPE RATE BITS DONE NEXT Press the DONE key to return to the primary soft key menu, press the NEXT key and the following menu appears.

  • Page 64: 3-7.5.2.2.2 Ieee-488 Bus

    CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG - REMOTE - NEXT Soft Key Menu. SHARE IDENT DONE NEXT Press the IDENT key to send the identification message out over the bus. The message identifies the manufacturer, the equipment name, the firmware version number, and date, and copyright notice. This message is less than 125 characters long.
  • Page 65 CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG - MEMORY Soft Key Menu. CANCEL NEXT Press NO or YES as desired, and the display goes back to the primary menu. Utility - CONFIG Soft Key Menu. INIT REMOTE PWRDWN ROLOFF CANCEL NEXT Press ROLOFF to set the low frequency -3 dB corner in Hertz for the SSB modes.

  • Page 66: Faults

    CDR-3250/80 TECHNICAL MANUAL Utility - CONFIG - NEXT MDFLTS Soft Key Menu. CANCEL NEXT Press the ON or OFF key to select whether default values for BW and AGC are selected when the receive mode is changed. The display returns to the Primary Menu.
  • Page 67 CDR-3250/80 TECHNICAL MANUAL Utility - FAULTS Soft Key Menu. CURNT CUMUL CANCEL NEXT The initial display shows the current fault status. Press CUMUL to switch to display of cumulative faults since power was turned on. Press CURNT to switch back to display of current faults. When pressed, the 8 9 keys allow scrolling through multiple faults.
  • Page 68 CDR-3250/80 TECHNICAL MANUAL Utility - INTENS Soft Key Menu. 62.5% 87.5% 100% DONE NEXT Select the desired display intensity, and press DONE; or press the NEXT key and the following menu appears. NOTE Display may not be visible in bright ambient light if 5% intensity is selected.
  • Page 69 CDR-3250/80 TECHNICAL MANUAL Utility - SYSTEM - SOUND Soft Key Menu. CLICK BEEP DONE NEXT Press BEEP to enable warning beeps. The following menus appears. Utility - SYSTEM - SOUND - BEEP Soft Key Menu. RETURN NEXT Select ON or OFF. Press RETURN to return to the previous menu.
  • Page 70 CDR-3250/80 TECHNICAL MANUAL Utility - SYSTEM - NEXT Soft Key Menu. MEMORY NEXT Press the MEMORY key to observe the HEX/ASCII display of memory (factory use only). The following menu appears. Utility - SYSTEM - NEXT - MEMORY Soft Key Menu.

  • Page 71: Section Ii. Remote Control

    3-8.1 Serial Bus Description. Two different interface standards are available for the The serial interface CDR-3250/80 receiver: Serial and IEEE-488. The serial includes both unbalanced (RS-232) and balanced (RS-422) interface includes both unbalanced (RS-232) and balanced line interfaces. The control firmware is designed to detect (RS-422) line interfaces.
  • Page 72 CDR-3250/80 TECHNICAL MANUAL |STX|1 2 3|F 2 3 9 8 7 6 0 0 0 SP M C|CR| |---|-Adr-|--------Data Field-/------|--| Start ASCII Carriage of Text Space Character Return NOTES: The first character of a transmission will always be STX (start of text, ASCII code 02).

  • Page 73: Serial Bus Interface Command Messages

    CDR-3250/80 TECHNICAL MANUAL 3-8.3.2.2 Serial Bus Interface Status Messages. Interface message (R?) to be sent, and Independent Mode 3 which status messages contain error status information caused by causes a signal strength report (SS?) to be sent. These a previous command message or other source. When the...
  • Page 74 CDR-3250/80 TECHNICAL MANUAL Most Radio Status Messages use the same format as the All Radio Status Messages (except the reply to the TB? Radio Command Message for that parameter (except for the command) are made up of fixed length strings so that X? command.).
  • Page 75 CDR-3250/80 TECHNICAL MANUAL Table 3-3 Serial Bus Interface Command Messages. Message Definition :NORM Set NORMAL interface mode :ACKN Set ACKNOWLEDGE interface mode :IND1 Set INDEPENDENT mode 1 :IND2 Set INDEPENDENT mode 2 :IND3 Set INDEPENDENT mode 3 Request Interface Status Message Table 3-4 Serial Bus Interface Status Messages.
  • Page 76 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description Continue operation from a wait condition caused by power on self test (POST) failure. This is the remote control equivalent of "press any key to continue". Enable or disable Automatic Gain Control (AGC) operation. Replace the * with 1 to enable AGC operation or 0 to disable AGC operation.
  • Page 77 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description BInnnnnnnnnn BIte Status: Each of the n characters represents one of the tests performed when the BITE sequence is performed and is replaced with a 1 to indicate that the test failed or a 0 to indicate that the test passed.
  • Page 78 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description CN123 CN--- Request the current channel number: The characters 123 represent the three digits of the current channel number. If the radio parameters have been changed since the last channel was recalled the reply message will take the second form with dashes in place of the digits.
  • Page 79 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description EEPCLR Clear the entire contents of the receiver's non-volatile memory. All user selected configuration items will be set to the original factory values. These values are: All 250 memory channels to default parameters.
  • Page 80 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description FAnnnnnnnnnnnnnnn Request the Faults, Accumulated: The 16 n characters indicate the accumulated status of the fault conditions with each n replaced with a 1 to indicate the fault is true or a 0 to indicate that the fault is not true.
  • Page 81 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description FAQ# Turn Fast Acquisition mode on/off. # represents a one character number to turn the Fast Acquisition mode on or off. Where 0 = off, and 1 = on.
  • Page 82 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description FAQ? FAQ# Request current Fast Acquisition mode. FAQ1=on, FAQ0=off FCnnnnnnnnnnnnnnn Request Faults, Current: Indicates current fault status (Refer to FA? above). Request Fault Status: The character * will be replaced with a 0 if no faults are currently detected, or by 1 if one or more faults are currently detected.
  • Page 83 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description I±1234 Change IF Shift setting. The ± character represents the sign of the desired value, and is replaced with either - or +. The digits 1 through 4 represent the value of the IF Shift in Hertz with the character 1 representing the 1 kilohertz digit and the 4 representing the Hertz digit.
  • Page 84 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description NBIFsnnn Narrow Band IF output frequency setting allows adjustment of the NBIF output center frequency over a limited range of frequencies, depending on the hardware option installed. The 's' character is replaced with a '+' character to select a normal non-inverted output spectrum, or a '-' to select an inverted output spectrum.
  • Page 85 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description RC### ReCall operating parameters from memory channel. ### represents the three digits of the memory channel from which to recall the parameters. Recalled data is entered immediately. This command is also used to set the starting channel for a scan or sweep operation in which case it is followed by a Scan or Sweep command.
  • Page 86 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description Controls the receiver Skip parameter. The * is replaced with a 1 to set or enable the skip function, and a 0 to clear the skip function. The actual action depends on the current state of the receiver.
  • Page 87 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description SS±123 Request signal strength: The ± character represents the sign of the value and will be either + or -. Digits 1 through 3 represent the significant digits...
  • Page 88 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description Set the Special Step Mode. This command is used to change the operation of the receiver when sweeping. The receiver outputs signal strength data characterizing the sweep. The manner in which the...
  • Page 89 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description (Refer to Request the Block signal strength: The reply to this command is a description) specially formatted block of data created by the receiver when sweeping in one of the Pan Sweep data collection modes (T2, T3, and T4). If Special Step Mode T4 is set, and more than one block of data is available in the output queue, a separate TB? command must be sent for each one.
  • Page 90 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description TGnnn Total Gain Reduction report, requests the amount of total gain reduction currently in effect. The reply is in the format 'TGnnn' with the characters nnn replaced with the actual total gain reduction in units of 1/2 dB. This command is only available over the remote control bus.
  • Page 91 In ISB mode the bandwidth is fixed and need not be sent. For all other modes other than AM and FM, the maximum bandwidth is limited to 6 kHz. The following is a list of bandwidths available in the CDR-3250 receiver (all bandwidths are in Hertz): 2100...
  • Page 92 CDR-3250/80 TECHNICAL MANUAL Table 3-5 Radio Command and Status Messages. Syntax Reply Description Y123 Change receiver AGC decay time. Digits 1 through 3 represent the significant digits of the AGC decay time in units of 10 ms. With the 1 representing the units of seconds digit, 2 the 100s of milliseconds, and the 3 the 10s of milliseconds.

  • Page 93: Remote Operation Using

    (Each CDR-3250/80 chassis is is in the remote or local mode. counted as one device.) Each receiver must have a unique address set on the front panel.
  • Page 94 CDR-3250/80 TECHNICAL MANUAL Table 3-6 IEEE-488 Bus Management Signals. Name (Mnemonic) Description Attention (ATN) Causes all devices to interpret data on the bus as a controller command. When ATN is true, the bus is placed in the "Command Mode". All devices on the bus interpret data on the eight data lines as commands.

  • Page 95: Device Clear And Selected

    CDR-3250/80 TECHNICAL MANUAL 3-9.4 SRQ and Serial Poll Response. The receiver will 3-10 POWER UP AND TESTING assert the Service Request uniline message (SRQ) when CONSIDERATIONS. any of several conditions occur. The status of each of these conditions is given in the Serial Poll response byte.

  • Page 96: Eeprom Clearing

    CDR-3250/80 TECHNICAL MANUAL 3-11 EEPROM CLEARING. The factory default remote interface parameters for the serial interface are as follows: If a POST failure was caused by a corrupted EEPROM (Interface Status TE:EEPR), send the ! command to clear Address the entire EEPROM to default values. This will cause the...

  • Page 97: General Theory Of Operation

    This chapter contains a block diagram description of the control DATA from the Control Section is clocked into the CDR-3250/80. Each of the boards/modules are discussed in shift register circuit. At the proper time, the DATA is the paragraphs below: (See figure FO-2.) latched into the shift register by the RF ENABLE signal.
  • Page 98 CDR-3250/80 TECHNICAL MANUAL sends the RF FAULT signal to the CPU if the 1ST LO 4-2.5.1 Control. The serial control DATA from the digital signal level falls below a preset level. module is clocked through a buffer into the fine phase-locked loop (PLL) circuits and through a shift 4-2.4.5 Second Mixer.
  • Page 99 CDR-3250/80 TECHNICAL MANUAL The signal leaves the module as the 1ST LO at 40.456 - operating parameters, such as frequency, mode, IF 70.456 MHz in 1 kHz steps at a level of +10 dBm. bandwidth, and gain are directly controlled by the Control Section.
  • Page 100 CDR-3250/80 TECHNICAL MANUAL STATUS MSG Receiver status information (current internal signals to be phase locked to the reference signal strength, audio output level, frequency standard. etc.) from the DSP Section. The broadband digitized 3RD IF signal from the A/D STATUS RDY...

  • Page 101: Rf Analog Module

    CDR-3250/80 TECHNICAL MANUAL demodulation using an independent BFO input. USB is FM VIDEO FM output to rear panel (except in ISB provided by the normal channel during ISB operation. mode). DC coupled. FM demodulation is accomplished with FIR differentiator NBIF...
  • Page 102 CDR-3250/80 TECHNICAL MANUAL provide a variable control voltage to the audio board in the Synthesizer module. Each of the other assemblies are described below. 4-2.10 Main Adjustment Knob. The Main Adjustment Knob allows receiver parameter entry using a knob, instead of a keypad.
  • Page 103 CDR-3250/80 TECHNICAL MANUAL Courtesy of http://BlackRadios.terryo.org Issue 2.2 4-7/(4-8 blank)

  • Page 104: Maintenance Instructions

    2. Remove the top and bottom covers of the unit as 5-3.1 External Inspection. follows: CDR-3250: Using a no. 2 Phillips screwdriver, 1. Check front panel for physical damage. push down and turn all captive fasteners on the 2. Check external case for physical damage.

  • Page 105: 5-4.2 Line Audio

    If incorrect results are correct reading is obtained. (See figure FO-5A obtained, perform corrective maintenance in Section II of (CDR-3250) or FO-5B (CDR-3280) ). this Chapter. Connect voltmeter to the 600 ohm ALTN audio output, J8 pins 4 and 5 on the rear panel.

  • Page 106: 5-4.3.1 Receiver Check

    INT REF standard. ADJ potentiometer until correct reading is 4. Set receiver to AM, 100 Hz BW, with AGC on. obtained. (See figure FO-5A (CDR-3250) or 5. Select METERS display on the front panel FO-5B (CDR-3280).) display.

  • Page 107: Section Ii. Corrective

    (Section I). threshold. Tune receiver to 2.624 MHz and check for 5-5.2 Built-In Tests. The CDR-3250/80 provides three USB audio (/DET AUDIO) signal. types of testing: power-on self test (POST), built-in test Set bite control to produce a test frequency equipment (BITE), and built-in test (BIT).

  • Page 108: 5-5.3 Troubleshooting Procedure

    CDR-3250/80 TECHNICAL MANUAL Tune receiver to 11.251 MHz and check for 5-5.3.2 Initial Checks. Before detailed troubleshooting, LSB audio (/DET AUDIO) signal. perform the following: Set bite control to produce a test frequency of 0.750 MHz and set gain to 6 1.
  • Page 109 CDR-3250/80 TECHNICAL MANUAL Message Meaning Action To Take Software Error Interrupt has Program failure 1. Recycle power occurred 2. Replace Digital Module Fault Detected in RF Module 1st LO signal not detected in RF 1. Check 2ND/3RD LO REF signal Analog Module, or 3rd LO PLL 2.
  • Page 110 CDR-3250/80 TECHNICAL MANUAL Message Meaning Action To Take GPIB: Ready to Talk But Not IEEE-488 external remote 1. Check remote controller Addressed controller did not send address 2. Replace Digital Module. within allotted time. 3. Replace Remote Connector board. GPIB: Got Talk Addr But No IEEE-488 external remote 1.

  • Page 111: Subassembly Removal And Replacement

    3. Lift module from unit to disengage connector. CDR-3250: Using a no. 2 Phillips screwdriver, push down 4. To replace, reverse removal procedures. and turn all captive fasteners on the cover 1/4 turn counter- clockwise, and remove the cover.

  • Page 112: 5-6.7 Keypad Board

    11. To replace, reverse removal procedures. 5. Using no. 2 Phillips screwdriver, remove screws on each side of chassis securing front panel to chassis. On CDR-3250, also remove 2 CAUTION screws from center of front panel near main adjustment knob.

  • Page 113: 5-6.12 Optical Shaft Encoder

    4. To replace, reverse removal procedures. 5-6.14 Support Handles NOTE To remove front handles on the CDR-3250, start at step 4. 1. Remove top and bottom cover. NOTE To replace either front panel handle, remove front panel. To remove either rear panel handle, remove rear panel.

  • Page 114: Preparation For Reshipment

    CDR-3250/80 TECHNICAL MANUAL CHAPTER 6 PREPARATION FOR RESHIPMENT 2. Cover the unit with foam or bubble-type packing 6-1 INTRODUCTION. material. 3. Place the unit in the center of the shipping This chapter contains information to prepare the unit for container.

  • Page 115: Storage

    CDR-3250/80 TECHNICAL MANUAL CHAPTER 7 STORAGE 7-1 INTRODUCTION. CAUTION This chapter contains information for storage of the Unit contains parts and assemblies equipment including environmental conditions and any sensitive to damage by electrostatic special preservation requirements. discharge (ESD). Do not ship or store near strong electrostatic, electromag- 7-2 STORAGE ENVIRONMENT.

  • Page 116: Parts List

    REPLACEABLE PARTS LISTING. Table 8-1 lists replaceable modules and chassis-mounted This chapter contains the parts list for replaceable modules components for the unit. (See figure FO-5A (CDR-3250) or and chassis-mounted components at the operational FO-5B (CDR-3280) for locations.) maintenance level.
  • Page 117 CDR-3250/80 TECHNICAL MANUAL FO-1A. CDR-3250 Outline and Mounting Drawing. Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-1/(FP-2 blank)
  • Page 118 CDR-3250/80 TECHNICAL MANUAL FO-1B. CDR-3280 Outline and Mounting Drawing. Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-3 /(FP-4 blank)
  • Page 119 CDR-3250/80 TECHNICAL MANUAL FO-2. CDR-3250/80 Block Diagram. Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-5/(FP-6 blank)
  • Page 120 CDR-3250/80 TECHNICAL MANUAL FO-3. CDR-3250/80 Interconnect Diagram. Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-7/(FP-8 blank)
  • Page 121 CDR-3250/80 TECHNICAL MANUAL FO-4. CDR-3250/80 Motherboard Schematic (Sheet 1 of 2). Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-9/(FP-10 blank)
  • Page 122 CDR-3250/80 TECHNICAL MANUAL FO-4. CDR-3250/80 Motherboard Schematic (Sheet 2 of 2). Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-11/(FP-12 blank)
  • Page 123 CDR-3250/80 TECHNICAL MANUAL FO-5A. CDR-3250 Replaceable Parts Locator Diagram (Sheet 1 of 2). Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-13/(FP-14 blank)
  • Page 124 CDR-3250/80 TECHNICAL MANUAL FO-5A. CDR-3250 Replaceable Parts Locator Diagram (Sheet 2 of 2). Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-15/(FP-16 blank)
  • Page 125 CDR-3250/80 TECHNICAL MANUAL FO-5B. CDR-3280 Replaceable Parts Locator Diagram.. Courtesy of http://BlackRadios.terryo.org Issue 2.2 FP-17/(FP-18 blank)

  • Page 126: Remote Control Only Option

    TECHNICAL MANUAL ANNEX OPERATION AND MAINTENANCE INSTRUCTIONS OPERATIONAL LEVEL REMOTE CONTROL ONLY OPTION NOTICE: This annex is incomplete without the associated technical manual Cubic Communications Inc. 9535 Waples Street San Diego, California 92121-2953 Telephone: (858) 643-5800 Telefax: (858) 643-5803 Rev. A 20 May 1997 Courtesy of http://BlackRadios.terryo.org...
  • Page 127 REMOTE CONTROL ONLY OPTION REMOTE CONTROL ONLY OPTION DESCRIPTION This annex supplements the technical manual and contains difference data for certain units that can only be operated remotely. The units are identified by the substitution of the standard front panel with a special front panel containing a removable plate that exposes two 8-switch DIP circuits.
  • Page 128 REMOTE CONTROL ONLY OPTION DIP-SWITCH FRONT PANEL DOWN LOAD PROCEDURES To down load the software via the DIP switch, follow the procedure as outlined below. Turn the power off to the unit. Set DIP Switch 1 on S1 to ON. Set address on S2 to 3 for the Control Program, 1 for DSP1, or 2 for DSP2.

  • Page 129: Dc Power Supply Option

    CDR-3250/80 TECHNICAL MANUAL ANNEX B TECHNICAL MANUAL ANNEX OPERATION AND MAINTENANCE INSTRUCTIONS OPERATIONAL LEVEL DC POWER SUPPLY OPTION CDR-3250/80 RECEIVER NOTICE: This annex is incomplete without the associated technical manual Cubic Communications Inc. 9535 Waples Street San Diego, California 92121-2953...
  • Page 130 +VDC IN +20 to +32 VDC, 3A maximum SHIELD GROUND Except for input power, the receiver functions identically to the AC powered CDR-3250/80 unit. Refer to Foldout 3.1 (FO-3.1), on page AN-2B for the DC Interconnect drawing option. Courtesy of http://BlackRadios.terryo.org Issue 2.1 Change 2...
  • Page 131 CDR-3250/80 TECHNICAL MANUAL FO-3.1 CDR-3250/80 DC Interconnect Diagram AN-2B Courtesy of http://BlackRadios.terryo.org Issue 2.1 Change 2...
  • Page 132 Courtesy of http://BlackRadios.terryo.org...

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Cdr-3280

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