Comtech EF Data SDM-300L3 Installation And Operation Manual Download Page 126

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SDM-300L3 Satellite Modem

Revision 1

Front Panel Operation

MN/SDM300L3.IOM

4–58

FUNCTION SELECT: CONFIGURATION: FLEX MUX:

RX CHAN #3 DATA RATE

RX CHAN #3 DR

64.0 Kbps

RECEIVE CHANNEL 3 DATA RATE: SYNC RS422: 0.6 to 4000.0 kbps
All

other

modes:

0.6

64.0

kbps

Note

: DR command is not displayed if AUPC or DISABLED were selected for MODE.

FUNCTION SELECT: CONFIGURATION: FLEX MUX:

RX CHAN #3 PHASE

RX CHAN #3 PHASE
CLK:NRM DATA:NRM

RECEIVE CHANNEL 3 PHASE:

NRM or INV (for both clock and data phase)

Note

: PHASE is not displayed if AUPC or DISABLED were selected for MODE.

FUNCTION SELECT: CONFIGURATION: FLEX MUX:

RX CHAN #4 MODE

ASYNC RS485

RECEIVE CHANNEL 4 MODE:

ASYNC RS232, SYNC RS232, ASYNC RS485,

AUPC,

DISABLED

Summary of Contents for SDM-300L3

Page 1: ...s document supersedes all previously published information regarding this product Product specifications are subject to change without prior notice Part Number MN SDM300L3 IOM Revision 1 SDM 300L3 Sat...

Page 2: ......

Page 3: ...the USA Comtech EF Data 2114 West 7th Street Tempe Arizona 85281 USA 480 333 2200 FAX 480 333 2161 SDM 300L3 Satellite Modem Installation and Operation Manual Part Number MN SDM300L3 IOM Revision 1 J...

Page 4: ...Support Department at service comtechefdata com Contact us via the web at www comtechefdata com 1 To return a Comtech EF Data product in warranty and out of warranty for repair or replacement 2 Reque...

Page 5: ...lator 1 6 1 6 1 Overview 1 6 1 6 2 Description 1 6 1 6 3 Description of Modulation Types 1 7 1 6 4 BPSK Encoding 1 8 1 6 5 QPSK Encoding 1 8 1 6 6 OQPSK Encoding 1 9 1 6 7 8 PSK Encoding 1 9 1 7 Descr...

Page 6: ...h Upgrading 2 16 CHAPTER 3 CONNECTOR PINOUTS 3 1 3 1 Connector Overview 3 1 3 2 Connector Description 3 3 3 2 1 Remote Connector and Pinouts J6 3 3 3 2 2 Fault Connector and Pinouts J7 3 4 3 2 3 Data...

Page 7: ...2 IDR Operation 5 2 5 3 IBS Operation 5 3 5 3 1 309 IBS Operation 5 3 5 3 2 VSAT IBS Operation 5 3 5 4 D I Operation 5 4 5 5 ASYNC AUPC Operation 5 5 5 6 Closed Network Operation Comtech EF Data 5 6 5...

Page 8: ...l TPC Modes 7 4 7 4 Uncoded Operation No FEC 7 5 CHAPTER 8 SYSTEM CHECKOUT 8 1 8 1 System Checkout 8 1 8 1 1 Interface Checkout 8 2 8 1 2 Modulator Checkout 8 3 8 1 3 Demodulator Checkout 8 5 CHAPTER...

Page 9: ...11 3 5 Buffer Operation 11 8 11 3 6 Loop Timing Operation 11 9 11 3 7 Baseband Loopback Operation 11 9 11 3 8 Non ASYNC Operation 11 10 11 4 ASYNC Channel EIA 485 2 and 4 Wire Operation 11 10 11 4 1 V...

Page 10: ...14 12 14 5 20 Modulator Output Return Loss 14 12 14 5 21 L Band ODU Reference Signal 14 12 14 5 22 L Band ODU Control and Monitor 14 12 14 5 23 Modulator Transmit IF Test Modes 14 12 14 5 24 L Band OD...

Page 11: ...ment 14 27 14 10 3 TX Data Phase Adjustment 14 27 14 10 4 Transmit Clock Source 14 27 14 10 5 Send Clock Timing Source 14 27 14 10 6 Doppler Plesiochronous Buffer Clock Source 14 28 14 10 7 RX Clock S...

Page 12: ...ming 14 39 14 16 3 IDR Engineering Service Channel 14 39 14 16 4 Optional Dual 32 Kpps ADPCM 2XASPCM Audio 14 39 14 17 System Specifications 14 40 14 17 1 Loopback Modes 14 40 14 17 2 Test Modes 14 40...

Page 13: ...re 6 4 IDR IBS G 703 Master Slave Clocking Diagram 6 7 Figure 6 5 D I G 703 Master Master Clocking Diagram 6 8 Figure 6 6 Clock Slip 6 10 Figure 6 7 Doppler Shift 6 11 Figure 6 8 Transmit Section of t...

Page 14: ...bo Product Coding processing delay comparison 7 3 Table 8 1 Conversion to S N and Eb N0 Chart 8 4 Table 10 1 IBS Modem Defaults 10 4 Table 10 2 IDR Modem Defaults 10 8 Table 10 3 D I Modem Faults 10 1...

Page 15: ...g documents are referenced in this manual Comtech EF Data UB 530 Universal Breakout Panel Installation and Operation Manual Conventions and References Cautions and Warnings CAUTION CAUTION indicates a...

Page 16: ...thru out the manual Trademarks Windows is a trademark of the Microsoft Corporation Other product names mentioned in this manual may be trademarks or registered trademarks of their respective companie...

Page 17: ...or line and neutral connections These are contained within the body of the IEC power connector behind a small plastic flap Use T3 15A 20mm fuses IMPORTANT For continued operator safety always replace...

Page 18: ...ble for use in the country of operation If it is necessary to replace this cable ensure the replacement has an equivalent specification Examples of acceptable ratings for the cable include HAR BASEC a...

Page 19: ...5 Surge Immunity EN 61000 4 6 RF Conducted Immunity EN 61000 4 8 Power frequency Magnetic Field Immunity EN 61000 4 9 Pulse Magnetic Field Immunity EN 61000 4 11 Voltage Dips Interruptions and Variat...

Page 20: ...EF Data No other warranty is expressed or implied Comtech EF Data specifically disclaims the implied warranties of merchantability and fitness for particular purpose Exclusive Remedies The remedies p...

Page 21: ...n Closed Network modes It offers variable data rates from 2 4 kbps to 5 0 Mbps in BPSK QPSK Offset QPSK and 8 PSK Viterbi Sequential concatenated Reed Solomon R S Trellis Coded Modulation TCM and Turb...

Page 22: ...ipment LNB LNB SDM 300L Satellite Modem Optional Breakout Panel UB 530 J8 User Data AUX 1 OC TTL Faults Form C Contacts Remote Port AC Or Optional DC Prime Power Note 1 Notes 1 Tx IF L Band only Outpu...

Page 23: ...kbps Yes FAST Full Rate Variable 5 0 Mbps Yes FAST OQPSK Yes FAST 8 PSK Requires Viterbi Reed Solomon Codec Overhead card required for Open Network Yes User TX RX L Band 0 02 ppm L Band Modem with hi...

Page 24: ...ing AC 85 to 264 VAC Yes Factory Primary Power 48 VDC Modem only No BUC Yes Factory ODU DC Power 24V or 48V Primary input AC Only 100W 24V 150W 48V Yes Factory 1 3 Comtech EF Data Part Numbers Part No...

Page 25: ...ed Table 1 1 FAST Options and Required Configurations Notes 1 The basic modem is shipped with either Sequential or Viterbi decoder 2 Requires G 703 Interface module and Overhead card 3 Either IBS Opti...

Page 26: ...1750 MHz range The types of modulation that encode the transmitted baseband data from the interface PCB are BPSK QPSK OQPSK 8 PSK 1 6 2 Description The modulator is composed of eight basic subsections...

Page 27: ...ive the I and Q channels of the modulator The baseband processing for the SDM 300L3 is the same as for the SDM 300L1 and SDM 300A modulator except that the digital modulation is not used Instead the b...

Page 28: ...he convolutional encoder provides two symbols output for every bit input Uncoded 1 1 rate BPSK operation also is allowed from 4 8 kbps to 2 5 Mbps Code Rate Symbols Bit Bits Hz 1 2 2 0 5 1 1 1 1 1 6 5...

Page 29: ...e High Power Amplifier HPA system The 1 1 1 2 3 4 and 7 8 rates encoded at the convolutional encoder provide the desired input output bit rates Code Rate Symbols Bit Bits Hz 1 1 1 2 1 2 2 1 3 4 1 333...

Page 30: ...K The demodulator then performs FEC decoding on the data stream to produce the error corrected data output to the data interface Figure 1 2 Demodulator Block Diagram DIGITAL SIGNAL PROCESSING DIGITAL...

Page 31: ...p control ensures that the digital representation of the I and Q channels is optimized for the Costas and Clock loops as well as the soft decision mapping circuitry When the active decoder determines...

Page 32: ...optional Sequential decoder The output is then sent to the optional Reed Solomon or Overhead PCB With the Turbo coding hardware option the vector rotation circuit output is sent to the optional Turbo...

Page 33: ...l Asynchronous Receiver Transmitter UART Digital to Analog Converter DAC Read Only Memory ROM Analog to Digital Converter ADC Read Access Memory RAM Universal ASYNC User Interface Fault and Alarm Rela...

Page 34: ...troller checks the non volatile memory to see if valid data has been retained If valid data has been retained the modem is reconfigured to the parameters maintained by the RAM 2 If the non volatile me...

Page 35: ...Introduction MN SDM300L3 IOM 1 15 1 9 Dimensional Envelope Refer to Figure 1 2 for the unit s dimensional envelope drawing Note Dimensions are listed in inches and centimeters are in parentheses Figu...

Page 36: ...SDM 300L3 Satellite Modem Revision 1 Introduction MN SDM300L3 IOM 1 16 This page is intentionally left blank...

Page 37: ...odem Unpack the modem 1 Cut the tape at the top of the carton indicated by OPEN THIS END 2 Remove the cardboard foam space covering the modem and caddypacks 3 Remove the modem caddypacks manual and po...

Page 38: ...10 32x1 2RK Bolt 10 Rack 2 HW 10 32X1 4 SHC Screw Socket 10 32 x 1 4inch Tools Required Screw Driver Phillips 5 32 inch SAE Allen Wrench 1 Install the IDU rear support brackets as follows a Install pr...

Page 39: ...Installation Upgrades MN SDM300L3 IOM 2 3 Equipment Rack Mounting Rail 10 Socket head screw BRACKET BOLTS Support Bracket IDU Note Components of mounting kit KT 6228 1 Figure 2 1 Installation of the...

Page 40: ...procedures when touching removing or inserting PCBs The following tool is required to install the overhead interface PCB Description Application Phillips Screwdriver To remove and replace cross point...

Page 41: ...nting hardware must be installed to provide proper grounding between the overhead interface PCB and the main PCB 5 After completing the installation procedure turn on the modem Select the desired mode...

Page 42: ...he shipment is complete 3 Inspect the Reed Solomon PCB for any shipping damage 2 3 2 2 Installation The following tool is required to install the overhead interface PCB Description Application Phillip...

Page 43: ...procedure turn on the modem If the Reed Solomon PCB was installed properly the Utility Modem Type Card 2 Type or Card 3 Type Menu will show Reed Solomon 02 or 03 or Reed Solomon Duplex Reed Solomon d...

Page 44: ...he shipment is complete 3 Inspect the Turbo PCBs for any shipping damage 2 3 3 2 Installation The following tool is required to install the overhead interface PCB Description Application Phillips Scre...

Page 45: ...on Align the Turbo board with either of the SIMM sockets while holding it vertically with components toward Rear panel Seat the connector into the socket and tilt the board toward the Front Panel unti...

Page 46: ...SDM 300L3 Satellite Modem Revision 1 Installation Upgrades MN SDM300L3 IOM 2 10 Figure 2 4 Turbo Codec Installation Turbo Codec Installed Either Slot...

Page 47: ...A 422 EIA449 V 35 Overhead 25 pin Connector X X X 34 pin Connector X 37 pin Connector X 50 pin Connector X X X X To remove Data I O Connector J8 as follows 1 For Ribbon Configured Connector PL 6031 Re...

Page 48: ...esult b Connect connector J8 to the PCB c Secure connector J8 to the rear panel with four screws d Position the rear panel to mate with the chassis and secure with four screws 2 Install 50 pin Data I...

Page 49: ...3 Satellite Modem Revision 1 Installation Upgrades MN SDM300L3 IOM 2 13 For Ribbon Configured Connector For 50 Pin Connector with Overhead Interface Board Figure 2 5 Data I O Connector J8 Removal Inst...

Page 50: ...chips The bulk firmware for the FPGA downloads is stored in a non replaceable flash memory device Bulk firmware can be upgraded by reflashing the device through the remote control port as described i...

Page 51: ...lite Modem Revision 1 Installation Upgrades MN SDM300L3 IOM 2 15 Figure 2 6 Overhead Board with Field Changeable Chips Figure 2 7 Main Board Field Changeable Chips Shown with Overhead Card Removed U68...

Page 52: ...mple process and users can obtain updates by any of the following means Download from the Comtech EF Data website http www comtechefdata com Request as E mail attachments Request shipment on diskettes...

Page 53: ...new folder on the PC This folder will be the destination folder for any flash upgrade files downloaded 2 On the Comtech EF Data web site http www comtechefdata com click the downloads link 3 Click the...

Page 54: ...SDM 300L3 Satellite Modem Revision 1 Installation Upgrades MN SDM300L3 IOM 2 18 This page is intentionally left blank...

Page 55: ...odem and other equipment Table 3 1 lists these connectors and Figure 3 1 show their locations Notes 1 Refer to the Comtech EF Data UB 530 Universal Breakout Panel Installation and Operation Manual for...

Page 56: ...G 703 ASYNC Closed Network REMOTE J6 9 pin D Female Remote Interface FAULT J7 9 pin D Female FORM C Fault Relay Contacts DATA I O Customer select J8 25 pin D Female 34 pin Female 37 pin D Female 50 pi...

Page 57: ...or mechanical security of the mating connector The remote connector interfaces the M C functions to a remote location The remote location can be an M C computer located away from the modem but attache...

Page 58: ...pin subminiature female D connector J7 located on the rear panel of the modem Screw locks are provided for mechanical security on the mating connector Refer to Table 3 3 for pinout information Table...

Page 59: ...the field 50 pin D that can be ordered with the basic modem but it does not include the Overhead Card This is used with breakout panels and switches 37 pin D is an alternate connector available upon...

Page 60: ...E B 12 ST B SCT B 13 CS B 14 SD B SD B 15 ST A ST SCT A 16 RD B RD B 17 RT A RXC SCR A 18 LL LL LL 19 RS B 20 MC A MC MC A 21 DF DF DF 22 DM B 23 MC B MC B 24 TT A TXC SCTE A 25 MF MF MF Note Use the...

Page 61: ...J k KK l LL have no connection The modem is available with a Winchester V 35 as the data I O connector PL 6032 There is a jumper on the unit that either opens or closes the CC line The interface is sh...

Page 62: ...21 DF 22 SD B 23 ST B 24 RD B 25 RS B 26 RT B 27 CS B 29 DM B 31 RR B 34 MC B 35 TT B There are jumpers on the PL 6031 EIA 422 interface Place the jumpers on the center pin and the pin towards the Ma...

Page 63: ...V 35 EIA 422 RT A Out 24 EIA 422 8k RClkB Out V 35 EIA 422 RT B Out V 35 EIA 422 RT B Out 25 BWO1_NC ESC TCLK Out EIA 232 26 BWO2_NC ESC RCLK Out EIA 232 27 BWO3_NC PRIMARY_NC PRIMARY_NC 28 BWO4_NC SE...

Page 64: ...the modem is used in a redundant system d Relay contacts DF C and DF NO are named for faulted condition DF C connected to DF NO unless demodulator Demod fault 2 D I ASYNC interface connector pinouts...

Page 65: ...r MC J4 supports the 75 unbalanced Master Clock interface The 15 pin D connector J5 supports the G 703 balanced TX and RX data balanced Master Clock Open Collector mod and demod fault and ASYNC overhe...

Page 66: ...GC_OUT is a programmable voltage 0 to 10V for a receive signal level between 25 and 60 dBm AUX 1 connection is a 9 pin female D connector J9 located on the rear panel of the modem Screw locks are prov...

Page 67: ...1 is faulted NO 2 COM 3 Alarm 1 is not faulted NC 4 Alarm 2 is faulted NO 5 COM 6 Alarm 2 is not faulted NC 7 Alarm 3 is faulted NO 8 COM 9 Alarm 3 is not faulted NC Alarm 1 Not used Alarm 2 TX Alarm...

Page 68: ...he following Input Power 55W maximum 40W typical without BUC power supply Input Voltage 90 to 132 or 175 to 264 VAC Unit switches ranges automatically Connector Type I E C Fuse Protection T3 15A 20mm...

Page 69: ...Front Panel View The front panel features include 32 character 2 line LCD display 6 button keypad for local control 10 LEDs to provide overall status at a glance All functions are accessible at the f...

Page 70: ...eceive chain Common Red A common equipment fault condition exists Stored Yellow A fault has been logged and stored The fault may or may not be active Status Power On Green Power is applied to the mode...

Page 71: ...using ENTER Pressing CLEAR generally returns the display to the previous selection Left and Right Diamond Keys These keys are used to move to the next selection or to move the cursor for certain funct...

Page 72: ...e sign on message press the or keys From the Function Select menu select one of the functional categories Configuration Monitor Faults Alarms Stored Faults Alarms Remote AUPC ASYNC mode only Utility P...

Page 73: ...enus or commands that are specific to certain modem configurations are only accessible after selecting the appropriate modem configuration This prevents incompatible parameters from accidentally being...

Page 74: ...BUFFER CENTER LOOP TIMING TX DATA FAULT RX DATA FAULT TX 2047 PATTERN RX 2047 PATTERN TX CODING FORMAT RX CODING FORMAT SERVICE CHANNEL ADJUST DROP FORMAT INSERT FORMAT DROP CHANNEL ASSIGNMENTS INSERT...

Page 75: ...URATION Press key to go to any of the following sub menus Press ENTER to review or edit the menu CONFIGURATION MODULATOR Permits the user to configure the modulator portion of the modem CONFIGURATION...

Page 76: ...ODULATOR TX X CODE DATA RATE TX A QPSK 1 2 64 000 Kbps TX B QPSK 1 2 128 000 Kbps TX C QPSK 1 2 256 000 Kbps TX D QPSK 1 2 512 000 Kbps TX V QPSK 1 2 38 400 Kbps Upon entry the current transmitter rat...

Page 77: ...atible with a combination of a CSC Closed Modulator Type and Sequential Encoder Code Rate Data Rate Range Non Turbo Requirements BPSK 1 2 2 4 to 1250 kbps O QPSK 1 2 4 8 to 2500 kbps O QPSK 3 4 7 2 to...

Page 78: ...nt the digit at the flashing cursor Press ENTER to execute the change Note When the transmitter frequency is changed the transmitter is automatically turned off to prevent the possible swamping of oth...

Page 79: ...ed with the flashing cursor on the first character Press or to increase or decrease the output power level in 0 1 dBm steps Press ENTER to execute the change TX POWER LEVEL 10 0 dBm ADJ This menu appe...

Page 80: ...or Off Upon entry the current status of the scrambler is displayed Press or to make the selection Press ENTER to execute the change FUNCTION SELECT CONFIGURATION MODULATOR DIFF ENCODER DIFF ENCODER ON...

Page 81: ...ressed carrier signal The upper side band is at one quarter of the symbol rate from the carrier When inverted spectrum is selected this generates a single lower side band suppressed carrier Upon entry...

Page 82: ...Class for BUCs that support these parameters If communications are not established then all of the following are indicated as faults under the Faults Alarms Outdoor Unit menu Temperature PLL Lock and...

Page 83: ...Normally when using this feature the ODU 10MHz reference is On and the ODU Power Supply is On This allows the ODU or BUC time to warm up before the carrier is transmitted Upon entry the current status...

Page 84: ...he Reed Solomon Encoder On or Off Upon entry the current status of the Reed Solomon encoder is displayed Press or to make the selection Press ENTER to execute the change 4 6 1 2 FUNCTION SELECT CONFIG...

Page 85: ...press ENTER twice To change the rate using the variable rate selection press ENTER when RX V is displayed A flashing cursor is displayed on the first character of the coding type on line 1 Press or t...

Page 86: ...SK 1 2 4 8 to 2386 363 kbps 8 PSK 3 4 384 to 5000 kbps Notes 1 Max Symbol Rate 2500 ksps 2 Max Data Rate for Low Var Rate 512 kbps 3 OQPSK Option only OQPSK 1 2 3 4 and 7 8 FUNCTION SELECT CONFIGURATI...

Page 87: ...menu The reminder of the functions is the same as RX IF Frequency Note This permits programming of the RX frequency of the satellite terminal including the modem and LNB When properly setup it indicat...

Page 88: ...300L3 IOM 4 20 FUNCTION SELECT CONFIGURATION DEMODULATOR DIFF DECODER DIFF DECODER ON Programs the differential decoder On or Off Upon entry the current status of the differential decoder is displayed...

Page 89: ...s or to make the selection Press ENTER to execute the change Figure 4 4 RF Loopback Note When RF loopback is turned on the demodulator receive frequency is programmed to be the same frequency as the m...

Page 90: ...and is reconnected to the IF input Refer to Figure 4 5 for a block diagram of IF loopback operation Note IF loopback nullifies RF loopback CUSTOMER DATA IBS IDR or 308 2 INTERFACE ENCODER MODULATOR T...

Page 91: ...may be disabled by specifying NONE Upon entry the current setting of the BER threshold is displayed Press or to select the desired setting Press ENTER to execute the change FUNCTION SELECT CONFIGURAT...

Page 92: ...o move the flashing cursor Press or to increment or decrement the digit at the flashing cursor Press ENTER to execute the change FUNCTION SELECT CONFIGURATION DEMODULATOR REACQUISITION REACQUISITION 0...

Page 93: ...ange FUNCTION SELECT CONFIGURATION DEMODULATOR LNB VOLTAGE LNB VOLTAGE 13 VDC Programs the LNB Power at 13 18 or 24 VDC Upon entry the current status of the descrambler is displayed Press or to make t...

Page 94: ...Reed Solomon decoder data error correction circuitry Data flow is then routed through normal data paths without error corrections This is a Test Mode OFF The RS decoder is normally disabled off positi...

Page 95: ...e TX clock to recover timing from the incoming clock data SCT INTERNAL Sets the TX clock to operate from the modem internal clock this is also the fallback clock Note When loop timing is enabled SCT L...

Page 96: ...rams the EXT REF clock input frequency between 8 000 kHz and 10000 000 kHz Notes 1 When an ODU or BUC is operated with an EXT REF 10 MHz is required 2 The clock rate shall be equal to the data rate un...

Page 97: ...his clock source to the external clock TX TERRESTRIAL Sets the buffer output clock to recover timing from the incoming TX data clock INSERT CLOCK Selects the recovered clock from the insert send data...

Page 98: ...mer side of the interface This is a bi directional loopback of the baseband data Refer to Figure 4 6 for a block diagram of baseband loopback operation CUSTOMER DATA IBS OR IDR INTERFACE ENCODER MODUL...

Page 99: ...rectional loop back of the data after the base band data has had the overhead added Refer to Figure 4 7 for the interface loopback block diagram Upon entry the current status is displayed or to make t...

Page 100: ...in seconds or bits Enter the Utility Interface menu to change the buffer units to seconds or bits If selecting seconds choose from 1 to 99 ms in increments of 1 ms 2 6 Mbps or 0 Bypass If selecting b...

Page 101: ...option is enabled SCT is phase locked to the RX Satellite clock FUNCTION SELECT CONFIGURATION INTERFACE TX DATA FAULT CONDITIONAL TX DATA FAULT NONE IMPORTANT Conditional This menu is only available...

Page 102: ...AIS or DATA The data monitored for RX data is coming from the satellite Refer to TX DATA FAULT for a description of function choices Upon entry the current monitored RX DATA FAULT is displayed Press...

Page 103: ...monitor to work on that 2047 pattern Upon entry the current status is displayed Press or to select on or off Press ENTER to execute the change FUNCTION SELECT CONFIGURATION INTERFACE TX CODING FORMAT...

Page 104: ...splayed Press or to make the selection Press ENTER to execute the change FUNCTION SELECT CONFIGURATION INTERFACE SERVICE CHANNEL ADJUST CONDITIONAL SERVICE CHANNEL ADJUST IMPORTANT Conditional This me...

Page 105: ...SDM 300L3 Satellite Modem Revision 1 Front Panel Operation MN SDM300L3 IOM 4 37 CHANNEL TX 1 LEVEL 5 dBm CHANNEL TX 2 LEVEL 5 dBm CHANNEL RX 1 LEVEL 5 dBm CHANNEL RX 2 LEVEL 5 dBm...

Page 106: ...Upon entry the current drop data channel signal is displayed Press or to make the selection Press ENTER to execute the change This configuration is used to select the desired drop data channel signali...

Page 107: ...een selected for Modem Type in the Utility menu and the Overhead Card is installed Selects the desired insert data channel signaling The choices are E1_CCS E1 Common Channel Signaling E1 CAS E1 Channe...

Page 108: ...ats Note Dropping time slot 0 is not permitted for E1_CLS T1_CAS or E1_31_TS Use time slot 16 only in E1_31_TS The number of drop channels is data rate dependent The number of drop channels is DR 64 k...

Page 109: ...ther formats Note The number of satellite channels inserted is data rate independent The number of channels is DR 64 kbps When the data rate is 64 kbps only one channel is inserted When the data rate...

Page 110: ...ayed Press or to select one of the following baud rates bps 110 150 300 600 1200 2400 4800 9600 and 19200 Press ENTER to execute the change FUNCTION SELECT CONFIGURATION INTERFACE ASYNC RX BAUD CONDIT...

Page 111: ...bits Upon entry the current status of the ASYNC TX word length is displayed Press or to make the selection Press ENTER to execute the change FUNCTION SELECT CONFIGURATION INTERFACE ASYNX RX LENGTH CON...

Page 112: ...op bits for 1 or 2 Upon entry the current status of the ASYNC TX stop bits is displayed Press or to make the selection Press ENTER to execute the change FUNCTION SELECT CONFIGURATION INTERFACE ASYNC R...

Page 113: ...ires that the Overhead Card is installed Programs the ASYNC overhead transmit parity for Even Odd or None Upon entry the current status of the ASYNC TX parity is displayed Press or to make the selecti...

Page 114: ...odems The optional Overhead card is installed and the Modem Type is ASYNC located under the Utility Modem Type menu In this mode ASYNC is available or The optional Reed Solomon cards are installed and...

Page 115: ...inal power value can range from 0 to 40 dBm in 0 5 dBm steps Upon entry the current nominal power value is displayed Press or to increment or decrement the digit at the flashing cursor Press ENTER to...

Page 116: ...Programs the maximum power level of the AUPC The maximum power level can range from 0 to 40 dBm in 0 5 dBm steps FUNCTION SELECT CONFIGURATION LOCAL AUPC TARGET EB NO CONDITIONAL TARGET EB NO 6 0 dB...

Page 117: ...AUPC LOCAL CL ACTION CONDITIONAL LOCAL CL ACTION HOLD IMPORTANT Conditional This menu is displayed when Local Modem AUPC ON located under the Utility Modem Type menu Programs the Local Carrier Loss ac...

Page 118: ...on CL for HOLD NOMINAL or MAXIMUM The modulator carrier at the local end moves to this value upon carrier loss at the remote end This only applies to remote AUPC between two carriers HOLD Upon Carrier...

Page 119: ...stalled CONFIGURATION MUX The multiplexer MUX system provides for 1 to 8 tributary channels to be multiplexed onto a single aggregate carrier Independent tributary data rates from 600 bps to 4000 kbps...

Page 120: ...te 0 6 to 4000 kbps and interface type RS 232 or RS 422 Repeat these selections for up to 8 tributaries FUNCTION SELECT CONFIGURATION MUX TRIBUTARY N TRIBUTARY N CLK NRM DATA NRM N 1 through 8 NRM or...

Page 121: ...led interface Simultaneous operation of a main data channel and three overhead channels are supported The main data channel is a G 703 type electrical interface at E1 2048 kbps or T1 1544 kbps terrest...

Page 122: ...3 menus are operational FUNCTION SELECT CONFIGURATION FLEX MUX TX CHAN 1 DATA RATE TX CHAN 1 DR 64 0 Kbps TX CHANNEL 1 DATA RATES 1544 0 Kbps or 2048 0 Kbps for bypass N 64 0 Kbps for D I Note DR comm...

Page 123: ...butary 4 The AUPC channel operates at 600 bps FUNCTION SELECT CONFIGURATION FLEX MUX TX CHAN 3 DATA RATE TX CHAN 3 DR 64 0 Kbps SYNC RS422 0 6 to 4000 0 kbps All other modes 0 6 to 64 0 kbps Channels...

Page 124: ...or Tributary 4 The AUPC channel operates at 600 bps FUNCTION SELECT CONFIGURATION FLEX MUX TX CHAN 4 DATA RATE TX CHAN 4 DR 9 6 Kbps TX CHANNEL 4 DATA RATE 0 6 to 64 0 kbps Channels 3 and 4 data rate...

Page 125: ...RATE RX CHAN 1 DR 64 0 Kbps RECEIVE CHANNEL 1 DATA RATE 1544 0 Kbps or 2048 0 Kbps for bypass N 64 0 Kbps for D I Note DR command is not displayed if DISABLED was selected for MODE FUNCTION SELECT CON...

Page 126: ...ote DR command is not displayed if AUPC or DISABLED were selected for MODE FUNCTION SELECT CONFIGURATION FLEX MUX RX CHAN 3 PHASE RX CHAN 3 PHASE CLK NRM DATA NRM RECEIVE CHANNEL 3 PHASE NRM or INV fo...

Page 127: ...DR 9 6 Kbps RECEIVE CHANNEL 4 DATA RATE 0 6 to 64 0 kbps Note DR is not displayed if AUPC or DISABLED were selected for MODE FUNCTION SELECT CONFIGURATION FLEX MUX RX CHAN 4 PHASE RX CHAN 4 PHASE CLK...

Page 128: ...sed to store specific configuration setups that are used frequently After changing the configuration parameters to the desired settings enter the Configuration Save menu and select memory location 1 t...

Page 129: ...mit is based on performance 2 High limit is based on data code rate Press or to move the flashing cursor and or to increment or decrement the selected kbps Press ENTER to execute the change FUNCTION S...

Page 130: ...to execute the change FUNCTION SELECT MONITOR RECEIVE SIGNAL RECEIVE SIGNAL 45 0dBm Displays the current receive signal level Range 135 dBm 10 log SR to 85 dBm 10log SR Press or to move the flashing c...

Page 131: ...RTANT Conditional This menu available only when the optional Overhead Card is installed Displays the current framing pattern bit error rate or No Data if carrier is not locked Monitors the currently s...

Page 132: ...POWER OFF Current displayed is 0 to 500 mA in 1 mA increments FUNCTION SELECT MONITOR LNB VOLTAGE LNB VOLTAGE XX VOLTS Monitors the LNB voltage or LNB VOLTAGE OFF Voltage displayed is 0 to 24 VDC in 1...

Page 133: ...ed when the FSK and ODU POWER SUPPLY are On under the Configuration Modulator menu Displays ODU output power as reported by an FSK capable BUC FUNCTION SELECT MONITOR ODU OUTPUT LEVEL OPTIONAL CONDITI...

Page 134: ...r the Configuration Modulator menu Displays ODU BUC temperature of 00 99 C of an FSK capable BUC FUNCTION SELECT MONITOR ODU PLL LOCK CONDITIONAL ODU PLL LOCK OK UNLOCKED IMPORTANT Conditional This me...

Page 135: ...TION SELECT MONITOR ODU POWER CLASS CONDITIONAL ODU POWER CLASS XX WATTS IMPORTANT Conditional This menu is displayed when FSK and ODU POWER SUPPLY are ON under the Configuration Modulator menu Displa...

Page 136: ...he following sub menus Line 2 of the display shows the current Faults Alarms status in real time For each parameter monitored fault status is displayed as one of the following indicates that no fault...

Page 137: ...dulator module fault CONFIGURATION Modulator configuration fault FUNCTION SELECT FAULTS ALARMS DEMODULATOR DEMODULATOR CARRIER DETECT Carrier detect fault Indicates the decoder is not locked IF SYNTHE...

Page 138: ...tomer data input to the modem When None is selected in the Interface Configuration menu the TX Data AIS Fault Alarm is not activated Overhead Card only Note AIS is an alarm not a switching fault TX CL...

Page 139: ...ult Indicates that the frame BER exceeds 1 3 BACKWARD ALARM Backward alarms BUFFER CLK PLL Buffer clock phase locked loop fault Indicates the buffer clock PLL is not locked BUFFER CLK ACT Activity det...

Page 140: ...e fault Typically indicates that the interface module is missing or will not program FUNCTION SELECT FAULTS ALARMS BACKWARD ALARMS CONDITIONAL BACKWARD ALARMS IMPORTANT Only available with IDR selecte...

Page 141: ...rrent Displays a current fault ODU BUC Power is On and Low or High Current Alarm set Voltage Displays a voltage fault ODU BUC Power is On and ODU Voltage deviates more than 20 from nominal Temperature...

Page 142: ...logged Flt0 with that last known time and date Also on power up an additional common equipment fault is logged Flt1 to indicate the power up time and date The power down and power up times are logged...

Page 143: ...time of a fault or alarm such as IF SYNTHESIZER DATA CLOCK SYN I CHANNEL Q CHANNEL AGC LEVEL MODEM REF ACT MODEM REF PLL MODULE CONFIGURATION ODU FUNCTION SELECT STORED FLTS ALMS DEMODULATOR DEMODULAT...

Page 144: ...DROP TX DATA AIS TX CLK PLL TX CLK ACTIVITY TX AUDIO 1 CLIP TX ADUIO 2 CLIP CONFIGURATION FUNCTION SELECT STORED FLTS ALMS RX INTERFACE RX INTERFACE X STORED TIME DATE Displays the stored date and ti...

Page 145: ...LOCK 12 VOLT SUPPLY 12 VOLT SUPPLY 5 VOLT SUPPLY SELF TEST CONTROLLER INTERFACE MODULE FUNCTION SELECT STORED FLTS ALMS BACKWARD ALRMS CONDITIONAL BACKWARD ALRMS X STORED TIME DATE IMPORTANT Condition...

Page 146: ...LY CHECKSUM FSK ONLY FUNCTION SELECT STORED FLTS ALMS UNAVAILABLE SECONDS CONDITIONAL UNAVAL SECONDS X STORED TIME DATE IMPORTANT Conditional This is available only with the Reed Solomon option A faul...

Page 147: ...e the Remote AUPC functions enter the Remote AUPC menu from the Function Select menu on the front panel After entering the Remote AUPC menu press or to select the Configuration or Monitor menu Enter t...

Page 148: ...end of the link This requires that modems at both ends of the link are locked to function This program is for control or last known status FUNCTION SELECT REMOTE AUPC CONFIGURATION B BAND LOOP BACK C...

Page 149: ...C option or the Reed Solomon Card with AUPC option Programs the remote TX 2047 pattern On or Off at the far end of the link Modems at both ends of the link shall be locked Note This program is for con...

Page 150: ...e when either the ASYNC or AUPC selection is made from the Modem Type menu located under the Utility Modem Type menu Requires either the Overhead Card installed with the ASYNC AUPC option or the Reed...

Page 151: ...CTION SELECT UTLITY FIXED MODEM RATE UTILITY FIXED MODEM RATE FUNCTION SELECT UTLITY FIXED MODEM RATE CODE RATE DATA RATE CONDITIONAL CR _____________ DR ___________Kb IMPORTANT This menu is displayed...

Page 152: ...o view using the arrow keys then press ENTER FUNCTION SELECT UTLITY MODULATOR ASSIGN TRANSMIT FILTERS Note The setting in the following menus changes the settings in the menus that appear under the Co...

Page 153: ...Low Var Rate 512 kbps 3 OQPSK Option only OQPSK 1 2 3 4 and 7 8 Upon entry the current transmitter rate is displayed with the flashing cursor on the first character of the code rate on line 1 Line 2 d...

Page 154: ...Configuration Modulator Menu Effect On 0 or The TX IF Frequency menu appears and the modem is programmed over the L Band range of frequencies 3000 65000 The TX Terminal Frequency menu appears and the...

Page 155: ...dulator power offset range is 99 9 to 99 9 dB in 0 1 dB steps Note Anything except 0 0 dB will cause ADJ to be displayed in the TX Power Level menu FUNCTION SELECT UTILITY MODULATOR MODULATOR TYPE MOD...

Page 156: ...TILITY MODULATOR SCRAMBLER TYPE SCRAMBLER TYPE INTELSAT V 35 This menu is status only and displays With Overhead and IBS Scrambler ON IBS SYNC With RS Scrambler On EFD MOD V 35 or IBS SYNC With Turbo...

Page 157: ...D SPECTRUM MOD SPECTRUM NORMAL Programmable vector rotation allows the operator to select NORMAL or INVERT for spectrum reversal of the I and Q baseband channels FUNCTION SELECT UTILITY MODULATOR TX R...

Page 158: ...S option are installed and selected An On indication enables 8 PSK 2 3 with Reed Solomon FUNCTION SELECT UTILITY MODULATOR TX IESS 315 MODE CONDITIONAL TX IESS 315 MODE OFF IMPORTANT Conditional Only...

Page 159: ...programmed limit The low limit shall be less than the high limit FUNCTION SELECT UTILITY MODULATOR RF MODE CONTROL RF MODE CONTROL NORMAL This menu control several operational variations of the Trans...

Page 160: ...ing on the described conditions One application for command is the operation of demand network systems FUNCTION SELECT UTILITY MODULATOR TX SYMBOL RATE TX SYMBOL RATE 64 000 Ksps Status only 4 800 to...

Page 161: ...ITY DEMODULATOR ASSIGN RECEIVE FILTERS Note The setting in the following menus changes the settings in the menus that appear under the Configuration Demodulator menus RX A QPSK 1 2 64 000 Kbps RX B QP...

Page 162: ...000 kbps Upon entry the current receive rate is displayed with the flashing cursor on the first character of the code rate on line 1 Line 2 displays the data rate Press or to make the selection To sel...

Page 163: ...MIX Configuration Demodulator Menu Effect on 0 or The RX IF Frequency menu appears and the modem is programmed over the L Band range of frequencies 3000 65000 The RX Terminal Frequency menu appears a...

Page 164: ...network receive filtering FUNCTION SELECT UTILITY DEMODULATOR DECODER TYPE CONTIONAL DECODER TYPE VITERBI IMPORTANT Conditional Changes only when Modem Type under Utility Modem Type is in either EFD C...

Page 165: ...OFF Descrambling is disabled IBS SYNC Intelsat per IESS 309 EF MOD V 35 Comtech EFD proprietary descrambling for Closed Network with Reed Solomon On Turbo SYNC Turbo SYNC Descrambler FUNCTION SELECT U...

Page 166: ...tatus only Deep is interleaver depth and is programmable to a depth of 4 8 or 16 FUNCTION SELECT UTILITY DEMODULATOR RX IESS 310 MODE CONDITIONAL RX IESS 310 MODE OFF IMPORTANT Conditional Note Only a...

Page 167: ...UTILITY DEMODULATOR LNB ALARM HIGH LNB ALARM HIGH 500 mA Status Only Programmable within 0 to 500 mA in 1 mA steps An alarm is generated whenever the LNB current exceeds the programmed limit Note The...

Page 168: ...VERHEAD TYPE NONE Select None IDR IBS DROP INSERT AUPC IBS 309 or ASYNC for TX overhead type Note Overhead types are selectable only when Custom is selected for modem type in the Utility Modem Type me...

Page 169: ...nditional G 703 is available only when the overhead interface card is installed Displays the TX interface type EIA 232 EIA 422 V 35 or G 703 FUNCTION SELECT UTILITY INTERFACE RX TERR INTERFACE CONDITI...

Page 170: ...icates whether the Bits or Milliseconds menu is displayed under Configuration Interface Buffer Size FUNCTION SELECT UTILITY INTERFACE FRAMING STRUCTURE FRAMING STRUCTURE Displays the currently selecte...

Page 171: ...structure and type Press ENTER to execute the change FUNCTION SELECT UTILITY INTERFACE FRAMING STRUCTURE E1 FRAMING E1 FRAMING STRUCTURE G 704 Upon entry the framing type T1 or E1 is displayed on Line...

Page 172: ...data phase relationship Use this option to select Normal or Invert for the RX data relationship to the selected RX clock FUNCTION SELECT UTILITY INTERFACE E1 INSERT CRC CONDITIONAL E1 INSERT CRC ON IM...

Page 173: ...n Modem Type IDR is enabled and the Overhead card is installed Controls IDR monitor and alarm functions when not using a communications link Use this option to select ON or OFF for the RX and TX alarm...

Page 174: ...head type FUNCTION SELECT UTILITY INTERFACE ASYNC RX TYPE CONDITIONAL ASYNC RX TYPE RS232 IMPORTANT Conditional This menu is available only with Modem Type ASYNC is enabled and the Overhead card is in...

Page 175: ...s enabled and the Overhead card is installed Select 2 32K Audio or 64K Data for the IDR RX ESC type FUNCTION SELECT UTILITY INTERFACE IBS TX ESC TYPE CONDITIONAL IBS TX ESC TYPE 2 32K AUDIO IMPORTANT...

Page 176: ...s menu available only with optional Overhead card and Modem Type IBS Select 2 32K Audio or Off for IBS RX ESC type Selecting 2 32k audio will multiplex two 32 kbps ADPCM audio channels into 64 kbps pa...

Page 177: ...UTDOOR UNIT ODU FSK ADDRESS CONDITIONAL ODU FSK ADDRESS 1 IMPORTANT Conditional This menu is available only when ODU Power Supply FSK and TX IF Output are On Selects the address the modem will use to...

Page 178: ...NTER to execute the change FUNCTION SELECT UTILITY OUTDOOR UNIT ODU PWR LEVELING CONDITIONAL ODU PWR LEVELING OFF IMPORTANT Conditional This menu is available only when ODU Power Supply and TX IF Outp...

Page 179: ...or to position the cursor over the parameter to be changed Press or to change the parameter Once the parameters are displayed as desired press ENTER to set the time and date FUNCTION SELECT UTILITY SY...

Page 180: ...e selection Press ENTER to execute the change Note Address 0 is reserved has a Global Address FUNCTION SELECT UTILITY SYSTEM REMOTE TYPE REMOTE TYPE RS485 2 WIRE Select EIA 485 2 Wire EIA 485 4 Wire o...

Page 181: ...STEM TEST MODE STATUS TEST MODE STATUS _ _ _ _ _ _ _ _ Test mode status indicator The following modem test points are listed and display a when a test mode is active RS CORR OFF INTRFC LOOP BACK B BAN...

Page 182: ...when turning on modem RUN initializes self test FUNCTION SELECT UTILITY SYSTEM DISPLAY CONTRAST DISPLAY CONTRAST LEVEL 64 Sets the contrast setting of the Front Panel menu Press ENTER to begin Press...

Page 183: ...to display the month day and year BOOT FIRMWARE VER x x x Press ENTER to display the version number FUNCTION SELECT UTILITY SYSTEM FPGA FIRMWARE FPGA FIRMWARE FW NNNNNN DDR Displays the FPGA module f...

Page 184: ...PWR 0 0 Volts Sets the AGC voltage for a RX signal The voltage range is 0 0 to 10 0V in 0 5V steps Upon entry the current external AGC voltage level is displayed Press or to increment or decrement the...

Page 185: ...on settings from ROM Initiating a soft reset will reset the modem hardware but saves the current configuration settings Select ENTER once to access HARD or SOFT 1 Press or to make the selection 2 Pres...

Page 186: ...nt operation VSAT IBS VSAT IBS operation No Overhead Card with RS 201 219 AUPC AUPC The TX and RX Reed Solomon cards Provides AUPC operation only and No ASYNC channel ASYNC ASYNC AUPC requires the ins...

Page 187: ...Press the arrows to move from one symbol to the next The first line will display the option The second line will display the status Option Code Legend HIGH POWER see Note HIGH STABILITY ASLT VITERBI S...

Page 188: ...MODEM TYPE CARD 1 TYPE CARD 1 TYPE OVERHEAD 01 Status Only Displays one of the following OVERHEAD 01 NOT INSTALLED FUNCTION SELECT UTILITY MODEM TYPE CARD 2 TYPE CARD 2 TYPE REED SOLOMON 03 Status On...

Page 189: ...SOLOMON 02 Status Only Displays one of the following DUPLEX REED SOLOMON REED SOLOMON 02 REED SOLOMON 03 TURBO NOT INSTALLED FUNCTION SELECT UTILITY MODEM TYPE CARD 1 OPTIONS CONDITIONAL CARD 1 OPTIO...

Page 190: ...LECT UTILITY MODEM TYPE CARD 2 OPTIONS CONDITIONAL CARD 2 OPTIONS Status Only Menu appears only when Card 2 is installed Displays one of the following REED SOLOMON 02 LIST INTELSAT AUPC REED SOLOMON 0...

Page 191: ...PE LOCAL MODEM AUPC LOCAL MODEM AUPC OFF Selecting Local Modem AUPC ON enables the Configuration Local AUPC menu where programming for self monitoring AUPC with one modem or remote AUPC between two mo...

Page 192: ...with AUPC option is installed select AUPC from the Modem Type menu under Utility Modem Type menu when AUPC between two modems is needed 3 The Modem must be configured for Duplex operation and the dem...

Page 193: ...SERIAL 012345678 Status Only Displays the CARD 3 serial number FUNCTION SELECT UTILITY MODEM TYPE CONFIGURATION CODE MODEM CONFIGURATION CODE MODEM Comtech EF Data supplied code Press ENTER 1 AAAAAAAA...

Page 194: ...ta supplied code Press ENTER 1 AAAAAAAAAA 2 AAAAAAAAAA On entry the current configuration code is displayed with the flashing cursor on the first character Press or to move the flashing cursor Press o...

Page 195: ...Comtech EF Data marketing representative for more information FUNCTION SELECT MODEM TYPE CONFIGURATION CODE CARD 3 CONDITIONAL CONFIGURATION CODE CARD 3 Comtech EF Data supplied code Press ENTER IMPOR...

Page 196: ...l Operation MN SDM300L3 IOM 4 128 4 6 6 8 FUNCTION SELECT UTILITY FACTORY SET UP UTILITY FACTORY SET UP CAUTION This configuration is used for factory alignment Unauthorized persons should not change...

Page 197: ...ier Mode Normal Modulated BER Threshold None Modem Reference Internal Sweep Center 0 Hz FSK Output Off Sweep Range 60000 Hz ODU Power Supply Off Reacquisition 0 seconds ODU Output Delay 00 00 Min Sec...

Page 198: ...or Data Rate A Date Rate A TX Rate A 64 kbps QPSK 1 2 RX Rate A 64 kbps QPSK 1 2 TX Rate B 128 kbps QPSK 1 2 RX Rate B 128 kbps QPSK 1 2 TX Rate C 256 kbps QPSK 1 2 RX Rate C 256 kbps QPSK 1 2 TX Rate...

Page 199: ...IBS RX ESC Type Off RX Data Phase Normal CTS Delay 0 seconds Utility Outdoor Unit ODU FSK Address 1 ODU PWR Leveling Off ODU Output Power Off Utility System Time 12 00 00 AM Self Test Off Date 7 04 7...

Page 200: ...SDM 300L3 Satellite Modem Revision 1 Front Panel Operation MN SDM300L3 IOM 4 132 This page is intentionally left blank...

Page 201: ...eration Each type allows the user to operate the modem under the requirements of the configuration specifications listed below Table 5 1 Modem Type Selection Configuration Specification IDR Intermedia...

Page 202: ...y Modem Type TX Data Code Rate TX V QPSK 3 4 Configuration Modulator TX IF Output ON Configuration Demodulator RX Data Code Rate RX V QPSK 3 4 Configuration Demodulator TX Clock Source TX Terrestrial...

Page 203: ...n Modulator TX IF Output ON Configuration Demodulator RX Data Code Rate RX V QPSK 1 2 or 3 4 Configuration Demodulator TX Clock Source TX Terrestrial Internal Ext Reference Configuration Interface Buf...

Page 204: ...4 Table 5 3 Configuration Demodulator TX Clock Source TX Terrestrial Configuration Interface Buffer Clock Source Insert Clock Configuration Interface TX Coding Format HDB3 Configuration Interface RX C...

Page 205: ...Configuration Interface ASYNC TX Length 5 to 8 bits Configuration Interface ASYNC RX Length 5 to 8 bits Configuration Interface ASYNC TX Stop 1 or 2 bits Configuration Interface ASYNC TX Parity Even...

Page 206: ...cation The modem can be compatible with other closed network applications by selecting different modulator and demodulator types Fairchild and Comstream compatible closed network systems can be suppor...

Page 207: ...ion Interface Modulator Type EFD Closed All modulator types are accessible Utility Modulator Encoder Type Viterbi or Sequential Utility Modulator Demodulator type EFD Closed All modulator types are ac...

Page 208: ...open network application For example to use the modem in the IDR mode of operation with overhead IESS308 2 the following steps are taken 1 Select the IDR modem type so that the modem loads the IDR def...

Page 209: ...3 EFD CLOSED IES 310 OFF ASYNC Overhead EFD MOD V 35 225 205 10 8 ASYNC 8 PSK 2 3 EFD CLOSED IESS 310 ON ASYNC Overhead EFD MOD V 35 219 201 9 4 VSAT IBS QPSK BPSK Intelsat Open VSAT IBS Compliant No...

Page 210: ...lity Modem Type 2 For IESS 310 8PSK 2 3 compliant operation it is necessary to make the selections in the previous step and select TX IESS 310 Mode On under the Utility Modulator menu and select RX IE...

Page 211: ...he most common options and recommended configurations 6 1 1 EIA 232 EIA 422 or V 35 Master Master Refer to Figure 6 1 for Clocking block diagram Transmit clock options Buffer clock options V 35 timing...

Page 212: ...cks and the received data is to be clocked to the local network Refer to Figure 6 3 for Clocking block diagram Transmit clock options Buffer clock options The disadvantage of the master master applica...

Page 213: ...oppler shift The length of the buffer at the master end will need to be twice the length that is normally required compensating for the Doppler shift on the outward and return paths 6 2 2 D I G 703 Ma...

Page 214: ...GH STABILITY OSCILLATOR HIGH STABILITY OSCILLATOR SATELLITE SATELLITE CLOCK RECOVERY CLOCK RECOVERY BUFFER BUFFER RD RD RT RT BUFFER CLOCK TX TERRESTRIAL BUFFER CLOCK TX TERRESTRIAL MASTER BOP BOP DTS...

Page 215: ...HIGH STABILITY OSCILLATION HIGH STABILITY OSCILLATION SATELLITE SATELLITE CLOCK RECOVERY DATA CLOCK BUFFER BUFFER RD RD RT RT BUFFER CLOCK TX TERRESTRIAL BUFFER CLOCK RX SATELLITE CLOCK MASTER BOP BO...

Page 216: ...GH STABILITY OSCILLATOR SATELLITE SATELLITE CLOCK RECOVERY BUFFER DATA CLOCK RD BUFFER CLOCK TX TERRESTRIAL MASTER BUFFER CLOCK TX TERRESTRIAL CLOCK RECOVERY BUFFER HIGH STABILITY OSCILLATOR INTERNAL...

Page 217: ...GH STABILITY OSCILLATOR SATELLITE SATELLITE CLOCK RECOVERY CLOCK RECOVERY BUFFER RD RD BUFFER CLOCK TX TERRESTRIAL BUFFER CLOCK RX SATELLITE CLOCK MASTER BOP BOP DTS DTS NOTE TERRESTRIAL EQUIPMENT MUS...

Page 218: ...CLOCK INSERT RX CLO CK INSERT MASTER BOP DTS DTS NOTE FOR MASTER SLAVE OPERATION IN G 70 SELECT TERRESTRIAL EQUIPMENT SLAVE SIDE THE MODEM SETTINGS REMAIN AS MASTER MAST THE USER EQUIPMENT WIL NEED TO...

Page 219: ...ng traffic is too slow an occasional bit will be repeated Doppler buffer of the signal of the satellite The Doppler shift results from the figure 8 Figure 6 7 station keeping movement performed by the...

Page 220: ...T 5 BIT 6 BIT 7 BIT 1 BIT 2 BIT 3 BIT 5 BIT 6 BIT 7 ERROR INTERFACE 1 INCOMING TRAFFIC TOO FAST BIT 1 BIT 2 BIT 3 BIT 4 BIT 5 BIT 6 BIT 1 BIT 2 BIT 3 BIT 3 BIT 4 BIT 5 BIT 6 ERROR INTERFACE 2 INCOMING...

Page 221: ...ATION KEEPING IS LIMITED TO PRODUCE A MORE INCLINED ORBIT THUS PROLONGING THE LIFE OF THE SATELLITE A SATELLITE IS MAINTAINED AT AN ASSIGNED GEOSTATIONARY LOCATION THROUGH THE USE OF GROUND COMMAND AD...

Page 222: ...ding to a figure 8 as the angle of inclination increases The orbit of the satellite can result in a peak to peak altitude variation of 2 85 km while the station keeping of a newly launched satellite w...

Page 223: ...fer will fill up with data using the clock from the satellite and will empty using the local clock The object of the buffer is to ensure that the buffer overflows or underflows at regular determinable...

Page 224: ...he data rate in the basic modem The asymmetrical clock loop reference must be one of the following Transmit terrestrial clock External clock input Receive clock input Notes 1 The clock inputs are as f...

Page 225: ...INT TT INT SCT DDS INT ST SCT INT DDS EXT REF See Note 2 ST SCT LOOP DDS EXT REF See Note 2 ST INT LOOP See Note 1 RXC PLL ST EXT CLOCK MC PLL ST Notes 1 When CONFIGURATION INTERFACE LOOP TIMING is s...

Page 226: ...Timing Block Diagram Example Master Slave Clocking Setup 1 Master site has a 10 MHz clock that is needed as the clock source 2 Unequal data rates 4 096 Mbps and 2 152 Mbps numbers divisible by 8 Maste...

Page 227: ...le to all unframed data When the data is framed such as 2048 kbps G732 or 1544 kbps G733 it is desirable to provide slips in predefined locations The advantage of organized slip locations in relation...

Page 228: ...SDM 300L3 Satellite Modem Revision 1 Clocking Options MN SDM300L3 IOM 6 18 6 7 3 Converting Between Bits and Seconds Bits to Seconds 1 Data Rate x Bits Seconds Seconds to Bits Data Rate x Seconds Bit...

Page 229: ...Solomon Concatenated per Closed Network Trellis FAST option Turbo Codec Uncoded The constraint lengths and encoding polynomials are not only Open Network compatible but also are Closed Network compati...

Page 230: ...C Codec Turbo Product Coding is an entirely stand alone method It does not require the complex interleaving de interleaving of the RS approach and consequently decoding delays are significantly reduce...

Page 231: ...64 kbps data rate Mod Demod delay ms Viterbi Rate 1 2 12 Sequential Rate 1 2 74 Viterbi Rate 1 2 with Reed Solomon 266 Sequential Rate 1 2 with Reed Solomon 522 Turbo Product Coding Rate 3 4 O QPSK 79...

Page 232: ...4 3 dB 1 50 bps Hz 0 67 x bit rate 793 kHz 8PSK Rate 2 3 TCM and RS IESS 310 6 1 dB 6 6 dB 1 82 bps Hz 0 56 x bit rate 666 kHz 8PSK Rate 3 4 Turbo 7 0 dB 8 0 dB 2 25 bps Hz 0 44 x bit rate 529 kHz Th...

Page 233: ...lve two of the four ambiguities and the remaining two can be resolved using serial differential encoding decoding However when no FEC is being used an entirely different scheme must be used Therefore...

Page 234: ...QPSK uncoded is used the symbol rate will be half of this rate or 32 ksymbols second One quarter of this equals 8 kHz Therefore the absolute maximum acquisition sweep range which should be considered...

Page 235: ...Decoder BPSK OQPSK Viterbi Decoding 1 0E 09 1 0E 08 1 0E 07 1 0E 06 1 0E 05 1 0E 04 1 0E 03 1 0E 02 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 Eb No dB BER Specification Limit 8PSK Rate 2 3 Coding...

Page 236: ...and Reed Solomon BPSK OQPSK Viterbi Decoder Reed Solomon 1 0E 11 1 0E 10 1 0E 09 1 0E 08 1 0E 07 1 0E 06 1 0E 05 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 Eb No dB BER Specification Limit Rate 7...

Page 237: ...Correction Options MN SDM300L3 IOM 7 9 Figure 7 3 BPSK and O QPSK BER Performance UNCODED 1 1 BPSK OQPSK 1 0E 07 1 0E 06 1 0E 05 1 0E 04 1 0E 03 1 0E 02 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0...

Page 238: ...PSK 8PSK Turbo Product Codec 1 0E 10 1 0E 09 1 0E 08 1 0E 07 1 0E 06 1 0E 05 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 Eb No dB BER Specification Limit 8PSK Rate 3 4 Coding Specification Limit QP...

Page 239: ...ntial Decoder Reed Solomon and 1544 kbps Sequential Decoder Reed Solomon 1544 Kbps 1 0E 11 1 0E 10 1 0E 09 1 0E 08 1 0E 07 1 0E 06 1 0E 05 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 Eb No dB BER S...

Page 240: ...gure 7 6 Sequential Decoder and 56 kbps BPSK OQPSK Sequential Decoder 56 Kbps 1 0E 09 1 0E 08 1 0E 07 1 0E 06 1 0E 05 1 0E 04 1 0E 03 1 0E 02 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 Eb No dB BE...

Page 241: ...equential Decoder and 1544 kbps BPSK QPSK Sequential Decoder 1544 Kbps 1 0E 09 1 0E 08 1 0E 07 1 0E 06 1 0E 05 1 0E 04 1 0E 03 1 0E 02 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 10 0 11 0 12 0 Eb No dB BER Speci...

Page 242: ...SDM 300L3 Satellite Modem Revision 1 Forward Error Correction Options MN SDM300L3 IOM 7 14 This page is intentionally left blank...

Page 243: ...lling external equipment A 2047 pattern is generated by the modem and routed through all sections Placing the modem in IF and baseband loopbacks accomplish this Pseudo Gaussian noise is introduced to...

Page 244: ...8 1 Fault Isolation Test Setup 1 Connect a BER test set to the appropriate modem data connector 2 Set up the modem for baseband loopback operation by using the Configuration Interface front panel men...

Page 245: ...ate Once the demodulator has locked to the incoming signal the Monitor menu will display signal level raw BER corrected BER and Eb N0 5 Connect a spectrum analyzer to the modem Ensure the IF output me...

Page 246: ...0 6 6 10 0 9 5 9 5 9 5 7 8 9 5 7 1 10 5 10 1 10 1 10 1 8 3 10 1 7 7 11 0 10 6 10 6 10 6 8 9 10 6 8 2 11 5 11 2 11 2 11 2 9 4 11 2 8 8 12 0 11 7 11 7 11 7 10 0 11 7 9 3 12 5 12 2 12 2 12 2 10 5 12 2 9...

Page 247: ...al seconds When the green carrier detect LED is on and the DEMUX lock fault has been cleared where applicable the modem will run at the specified error rate Run the TX power level input amplitude over...

Page 248: ...SDM 300L3 Satellite Modem Revision 1 System Checkout MN SDM300L3 IOM 8 6 WITH NOISE WITHOUT NOISE Figure 8 3 Typical Eye Constellations...

Page 249: ...ulator Demodulator Transmit Interface Receive Interface Common Equipment Backward Alarms Note Each fault or alarm category includes possible problems and the appropriate action required to repair the...

Page 250: ...e fault clears If the fault clears the occurrence is also stored A total of 10 occurrences of any fault can be stored Each fault or stored fault indicated by a front panel LED could be one of many fau...

Page 251: ...R E L A Y S E C O N D A R Y A L A R M R E L A Y I B S B A C K W A R D A L A R M D E F E R R E D M A I N A L A R M T X A I S R X A I S D I T E R R B W A 1 2 3 4 5 6 7 8 MODULATOR FAULTS IF SYNTHESIZER...

Page 252: ...I M A R Y A L A R M R E L A Y S E C O N D A R Y A L A R M R E L A Y I B S B A C K W A R D A L A R M D E F E R R E D M A I N A L A R M T X A I S R X A I S D I T E R R B W A 1 2 3 4 5 6 7 8 COMMON EQUI...

Page 253: ...NC 4 TX ALARM 2 Pin 4 NO 5 COM 6 NC 5 RX ALARM 3 Pin 7 NO 8 COM 9 NC 6 PRIMARY ALARM Pin 43 NO 10 COM 27 NC 7 SECONDARY ALARM Pin 44 NO 11 COM 28 NC 8 DEF MAINT ALARM Pin 17 IDR only IBS only D I only...

Page 254: ...rogrammed to 1640 kbit s An IBS type would be programmed for the input data rate to the channel unit The modem accounts for the overhead because of the change in internal reference Use interface loopb...

Page 255: ...Contact the Adaptive Broadband Customer Support Department I CHANNEL Indicates a loss of activity in the I channel of the quadrature demodulator Typically indicates a problem in the modulator side of...

Page 256: ...tive when a modem has been hard reset or the firmware has been changed When a hard reset has been executed or the firmware has been changed this fault will typically be active when the modem is first...

Page 257: ...backward alarm 1 Refer to BW Alarm RX4 for details BW ALARM TX4 Transmit backward alarm 4 The modem is being instructed to send backward alarm 4 to the distant end of the link This alarm is controlle...

Page 258: ...SDM 300L3 Satellite Modem Revision 1 Fault Isolation MN SDM300L3 IOM 9 10 This page is intentionally left blank...

Page 259: ...format to Transistor Transistor Logic TTL The data is scrambled synchronously with the multiframe sync in the multiplexer The scrambler is enabled using the front panel External input and output for a...

Page 260: ...r clock selections clocking the data out of the buffer Internal Clock SCT RX Recovered Clock RXCLK External Reference Clock EXT High Stability Clock HI STAB TX Clock Dejittered TXCLK If either RXCLK o...

Page 261: ...SDM 300L3 Satellite Modem Revision 1 Open Network Operations MN SDM300L3 IOM 10 3 Figure 10 1 IBS Interface Block Diagram...

Page 262: ...FF Modulator Type INTELSAT Open Net RF Loopback OFF Encoder Type Viterbi Sweep Center Freq 0 Hz CW Mode Normal OFF Sweep Range 60000 Hz Mod Power Fixed 0 dB Sweep Reacquisition 0 seconds Mod Spectrum...

Page 263: ...dio channels are encoded according to CCITT G 721 The backward alarms are level translated to TTL by threshold comparators set to 2 5V A 1K pull up resistor to 5V is connected to each alarm input The...

Page 264: ...ard in a simple single destination link INTELSAT specifies that any major failure of the downlink chain is to generate a backward alarm The modem has a demodulator fault relay which de energizes in th...

Page 265: ...SDM 300L3 Satellite Modem Revision 1 Open Network Operations MN SDM300L3 IOM 10 7 Figure 10 2 IDR Interface Block Diagram...

Page 266: ...k OFF Modulator Type INTELSAT Open Net RF Loopback OFF Encoder Type Viterbi Sweep Center Freq 0 Hz CW Mode Normal OFF Sweep Range 60000 Hz Mod Power Fixed 0 dB Sweep Reacquisition 0 seconds Mod Spectr...

Page 267: ...IA 232 interface Selection of the transmit and receive data rates may be made in 64 kbps increments and may be independent of each other The actual satellite rates are 16 15 of the transmit or receive...

Page 268: ...SDM 300L3 Satellite Modem Revision 1 Open Network Operations MN SDM300L3 IOM 10 10 Figure 10 3 D I with Asynchronous Overhead Data Flow...

Page 269: ...the far end of any redundancy switching in order to allow transmit and receive chains to be switched independently The zero substitution codes Alternate Mark Inversion AMI B8ZS and HDB3 are user selec...

Page 270: ...the MUX system is locked MUXlock and passing data This is indicated by interrogating the modem a green LED on the interface and sending the signal into the receive fault tree in accordance with IESS 3...

Page 271: ...s are also allowed at a rate of 1 512 of the data rate of the modem The synchronous channel requires use of the TX clock provided by the modem for operation 10 4 1 6 Backward Alarm A backward alarm si...

Page 272: ...categories as follows T1_ESF T1 Extended Super Frame T1 T1 D4 Framing T1_ESF_S T1 Extended Super Frame Special T1_S T1 D4 Framing Special T1_IBS T1 IBS Non Fractional Full 1 544M E1_CCS E1 Common Cha...

Page 273: ...SDM 300L3 Satellite Modem Revision 1 Open Network Operations MN SDM300L3 IOM 10 15 Figure 10 4 E1 Framing Formats...

Page 274: ...SDM 300L3 Satellite Modem Revision 1 Open Network Operations MN SDM300L3 IOM 10 16 Figure 10 5 T1 Framing Formats...

Page 275: ...xed 0 dB Sweep Reacquisition 0 seconds Mod Spectrum Normal BER Threshold NONE Demod Spectrum Normal Interface TX Clock Source TX Terrestrial Buffer Size 1 mS Buffer Clock Source Insert Frame Structure...

Page 276: ...ice channels Adjustment of the voice channel levels is made the same as in IDR operation When this mode is active the two voice channels completely use the 64 kbps IBS channel and the only data channe...

Page 277: ...PC interface option G 703 EIA 422 or V 35 interfaces are available for terrestrial data input and output These interfaces can be selected via the front panel EIA 485 or EIA 232 interfaces are availabl...

Page 278: ...operator with the maximum rate available limited to 1 875 of the synchronous data rate Note The asynchronous overhead structure is an Comtech EF Data standard and is not compatible with IBS or IDR ove...

Page 279: ...DATA FROM M C TERR DATA TERR OVERHEAD CLOCK INTERFACE CNT SIGNALS ASYNC DATA ASYNC DATA UART M C CONTROL G 703 V 35 TERR DATA TERR CLOCK BUFFER AUPC DATA TO M C RX DATA RX CLK INTERFACE SIGNALS PLL U...

Page 280: ...tween two modems Table 11 1 Setting AUPC Parameters AUPC ENABLE Enables the AUPC to function locally Configuration Local AUPC menu NOMINAL POWER Output power level Can be used for problem conditions i...

Page 281: ...e receive noise is 16 dB or better 3 Modem A will be transmitting at the maximum output if the local carrier loss action is set to maximum 4 Caution shall be observed when setting the target Eb N0 abo...

Page 282: ...proceed 2047 Error This indicates the BER at the distant end measured from the 2047 pattern This requires that the 2047 pattern is tuned On at the near end 11 2 2 Self Monitoring Local Modem AUPC Cont...

Page 283: ...Data Interfaces Two I O interfaces are provided for the terrestrial data source EIA 422 and V 35 The operator must select the terrestrial interface type from the front panel under the Utility Interfac...

Page 284: ...he modulator card on the modem at the overhead rate 11 3 4 DEMUX Operation The DEMUX section functions in a reverse manner to the MUX side Data including overhead is received from the Demod card in th...

Page 285: ...the modem using the recovered clock from the demodulator IF input The SCT clock output will be phase locked to the RX Satellite clock when loop timing is selected The operator can use the clock devel...

Page 286: ...EIA 485 channel The 2 or 4 wire operation is selected via the front panel In the 2 wire mode the EIA 485 receivers are disabled whenever the data is to be transmitted down the 2 wire interface In the...

Page 287: ...s 19200 If DR 2048 999K Maximum baud rate is 38400 The following table lists examples If DR 8 000K Baud rate can be 150 or lower If DR 16 000K Baud rate can be 300 or lower If DR 32 000K Baud rate can...

Page 288: ...remote modems front panel configuration parameters must be set for each type of configuration Industry standard cables must be used at both modems To implement remote ASYNC operation use the configur...

Page 289: ...9 PIN TO 25 PIN EIA 485 25 PIN CONNECTOR TO 9 PIN CONNECTOR INDUSTRY STANDARD CA 4056 CA 4056 LOCAL END REMOTE END BENCH TEST 50 PIN 50 PIN Figure 11 2 Remote ASYNC Connection Diagram for Y Cable WYS...

Page 290: ...d RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects th...

Page 291: ...RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the...

Page 292: ...C TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable conn...

Page 293: ...Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25...

Page 294: ...ength 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects the 25 p...

Page 295: ...and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits Utility System Menu Remote Baud Rate Equal to ASYNC TX and RX baud rate Parity Even Address 1 to 255 The local end cable connects...

Page 296: ...Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 See A 4 6 ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits 7 Remote End Modem Settings for EIA 232 Uti...

Page 297: ...X 5 2 3 TX RX In addition the following table lists the pinout for the WYSE terminal cable using an EIA 232 to EIA 485 converter 7 Local End WYSE Cable With Converter 25 Pin Male Connector 9 Pin Male...

Page 298: ...Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 See A 4 6 ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits 8 Remote End Modem Settings for EIA 485 4 W...

Page 299: ...n addition the following table lists the pinout for the WYSE terminal cable using an EIA 232 to EIA 485 converter 8 Local End WYSE Cable With Converter 25 Pin Male Connector 9 Pin Male Connector TX RX...

Page 300: ...Mod Power Fixed 0 dB Demodulator Type EFD Closed Decoder Type Viterbi Demod Spectrum Normal Interface TX Clock Source TX Terrestrial Frame Structure E1 Data G 704 Buffer Clock Source RX Satellite Fram...

Page 301: ...ing in G 703 operation because the modem does not emit an ST signal for the Transmit Clock Source 12 1 1 G 703 Specifications Table 12 1 G 703 Specifications Parameter Specification Primary Data Circu...

Page 302: ...SDM 300L3 Satellite Modem Revision 1 G 703 MN SDM300L3 IOM 12 2 This page is intentionally left blank...

Page 303: ...ique access code to enable configuration of the available hardware The access code can be purchased at any time from Comtech EF Data Once obtained the access code is loaded into the unit through the f...

Page 304: ...to select Modem Options menu 2 Press ENTER 3 Scroll through the Modem Options and check off all features that display a sign as follows HIGH POWER SINGLE RATE HIGH STABILITY LOW RATE VOLTAGE ASLT FUL...

Page 305: ...Go to Utility Modem Type menu 5 Press ENTER 6 Go to Configuration Code Modem menu 7 Press ENTER 8 Menu should display as follows 1 AAAAAAAAAA 2 AAAAAAAAAA 9 To enter the code press ENTER and use the...

Page 306: ...boot up to the factory default settings Note If the unit is an SDR 54 54A the power should be cycled to re initialize the unit and enable the option s Verify Upgrade 1 Press CLEAR to return to the Mai...

Page 307: ...d into sections as follows Specifications Summary BER Specifications Modem Specifications Demodulator Specifications Interface Specifications Terrestrial Interface Types System Specifications BUC FSK...

Page 308: ...Modulator I Q Sat Clock AGC AUX 1 AUX 1 AUX 1 Control Status Tx IF Ext Ref Rx IF CP1 CP2 CP3 Ref Osc Ref Osc Power Supply Power Supply Transmit RF Equipment BUC LNB LNB SDM 300L3 Satellite Modem Opti...

Page 309: ...ON OFF External Reference Input 1 5 10 20 MHz 75 0 to 20 dBm on 50 BNC Female Note Only 10 MHz allowed when operating with BUC and LNB requiring 10 MHz reference from modem Open Collector Fault Repor...

Page 310: ...Noise On center conductor of L Band output connector 10 0 MHz 0 02 ppm Optional 1 0 ppm 0 0 dBm 3 dBm dB Hz Frequency Offset 110 10 Hz 135 100 kHz 140 1 kHz 150 10 kHz 150 100 kHz Outdoor Unit ODU Sup...

Page 311: ...cified is for IF loop back with added noise LNB 10 MHz Reference On center conductor of L band input connector selectable ON OFF Level 3 3 dBm Source 1 Internal High Stability Reference 2 REF EXT Supp...

Page 312: ...5 0 Mbps BPSK 1 2 QPSK 1 2 QPSK 3 4 QPSK 7 8 Sequential Sequential Sequential Sequential 2 4 kbps 4 8 kbps 7 2 kbps 8 4 kbps 1 25 Mbps 2 5 Mbps 3 75 Mbps 4 375 Mbps BPSK 1 2 O QPSK 1 2 O QPSK 3 4 O QP...

Page 313: ...nd Reed Solomon 2 4 kbps 64 kbps 64 kbps 4 8 kbps 7 2 kbps 8 4 kbps 1024 kbps 2048 kbps 1920 kbps 2048 kbps 2048 kbps 2048 kbps QPSK 3 4 QPSK 3 4 IDR T1 IDR E1 1544 kbps 2048 kbps Fixed Rate QPSK 3 4...

Page 314: ...erhead 219 201 4 VSAT IBS IBS IDR E1 126 112 4 IDR Small Carrier SDM 300 Legacy QPSK QPSK OQPSK QPSK QPSK PTCM RS EFD Compatible 2 3 225 205 Closed or IDR T1 126 112 IBS and D I 219 201 IDR E1 8 PSK P...

Page 315: ...DR with RS ITU V 35 Intelsat Modified Intelsat Open IBS D I IESS 310 2 15 1 Synchronous 14 5 4 Modulator Frequency Reference SCT RX Bit Clock and IF output are locked to the Frequency Reference Intern...

Page 316: ...spurious from 0 to 0 75 x symbol rate is 42 dBc or lower 14 5 7 Modulator IF Output Spectrum Shape The modem meets the following TX output spectral mask specifications The desired mask is selectable...

Page 317: ...PSK Depth 4 No Overhead IBS D I IESS 310 Depth 8 Closed Network Async 8 PSK Depth 8 IDR IESS 310 14 5 12 Modulator Transmit Frequency IF The range of the output IF the operator from 950 to 1750 MHz in...

Page 318: ...4dB at 50 950 to 1350 MHz Carrier Frequency 1350 MHz 14dB at 50 1350 to 1750 MHz 14 5 21 L Band ODU Reference Signal The IDU shall provide a synthesizer reference on the center conductor of the L Band...

Page 319: ...to the ODU and provide programmable minimum and maximum current thresholds An alarm is produced when the sensed current to the ODU either falls below the minimum programmed threshold or exceeds the m...

Page 320: ...tting the I and Q channel modulation signals This offset prevents the RF envelope from going through zero Under certain conditions this may allow less back off in the High Power Amplifier HPA system T...

Page 321: ...ps 5 0 Mbps BPSK 1 2 QPSK 1 2 QPSK 3 4 QPSK 7 8 Sequential Sequential Sequential Sequential 2 4 kbps 4 8 kbps 7 2 kbps 8 4 kbps 1 25 Mbps 2 5 Mbps 3 75 Mbps 4 375 Mbps BPSK 1 2 O QPSK 1 2 O QPSK 3 4 O...

Page 322: ...and Reed Solomon 2 4 kbps 64 kbps 64 kbps 4 8 kbps 7 2 kbps 8 4 kbps 1024 kbps 2048 kbps 1920 kbps 2048 kbps 2048 kbps 2048 kbps QPSK 3 4 QPSK 3 4 IDR T1 IDR E1 1544 kbps 2048 kbps Fixed Rate QPSK 3 4...

Page 323: ...No Overhead ASYNC Overhead 219 201 4 VSAT IBS IBS IDR E1 126 112 4 IDR Small Carrier SDM 300 Legacy QPSK OQPSK PTCM RS EFD Compatible 2 3 225 205 Closed or IDR T1 126 112 IBS and D I 219 201 IDR E1 8...

Page 324: ...ynchronous FDC Closed Sequential or Viterbi FDC Modified V 35 INTELSAT Open Viterbi IDR ITU V 35 INTELSAT Modified INTELSAT Open Viterbi IDR with RS ITU V 35 INTELSAT Modified INTELSAT Open IBS D I IE...

Page 325: ...t be damaged by a continuous receive input of 20 dBm 14 7 10 Demodulator Input Return Loss The demodulator input return loss shall be 10 dB into a 75 load 14 7 11 LNB Prime Power The DC input on the c...

Page 326: ...of all carriers within 10 MHz from the desired is 30 dBc The sum of all carriers is 40 dBc with respect to the desired carrier for symbol rates 64 Ks s The sum of all carriers is 50 dBc with respect t...

Page 327: ...vs Symbol Rate 14 7 17 Demodulator Channel Spacing Adjacent Carrier Performance The modem BER will be degraded less than 0 5 dB with the following receive signal Two like modulated carriers spaced 1...

Page 328: ...5 7 6 9 10 5 5 3 6 4 7 6 10 6 6 0 7 2 8 3 8 7 10 7 6 6 7 9 8 9 9 5 10 8 7 2 8 5 9 6 10 2 14 8 2 Performance with Noise Viterbi Decoder and Reed Solomon Optional Required Eb No BPSK and O QPSK BER 1 2...

Page 329: ...formance is virtually error free above 4dB Eb No performance below 4 0 dB Eb No is not guaranteed for 5 16 BPSK 14 8 5 Performance With Noise 1544 kbps Sequential Decoder and Reed Solomon Optional Req...

Page 330: ...7 8 Rate 10 3 4 8 5 2 6 0 10 4 5 2 5 7 6 4 10 5 5 6 6 1 6 9 10 6 5 9 6 5 7 4 10 7 6 3 7 0 7 9 10 8 6 7 7 4 8 4 Note OQPSK with Sequential is not available 14 8 8 BER Threshold 1 The modem will have a...

Page 331: ...ps 1 sec 95 Sequential 6 dB Eb N0 with 35 kHz Frequency Uncertainty Code Rate Data Rate Tacq P t Tacq 1 2 2 4 4 8 kbps 20 sec 95 1 2 4 8 9 6 kbps 10 sec 95 1 2 9 6 64 kbps 5 sec 95 1 2 64 190 kbps 1 s...

Page 332: ...level is available at the rear panel at 10 mA maximum 0 to 10V Default levels are 0V for minimum signal level and 10V for maximum signal level The low level 0V can be programmed from 0 to 10V in 0 5V...

Page 333: ...elected frequency reference 14 10 5 Send Clock Timing Source The send clock timing output can be generated from the Frequency Reference either via the front panel or remotely In this mode the send clo...

Page 334: ...ng Option it can be any multiple of 1 kHz as long as it is 64 kHz 5 MHz or any multiple of 600 Hz as long as it is 2 4 kHz 64 kHz SCT Internal 10 PPM or per high stability option 14 10 7 RX Clock Swit...

Page 335: ...nt sink fault is open circuit Demodulator Fault Open collector output 15V maximum 20 mA maximum current sink fault is open circuit 14 11 Decoding 14 11 1 BPSK Decoding Using vector analysis of the con...

Page 336: ...tting the I and Q channel modulation signals This offset prevents the RF envelope from going through zero Under certain conditions this may allow less back off in the High Power Amplifier HPA system T...

Page 337: ...tor Optional X X X G 703 BNC F and DB15 DB15 for ASYNC 14 12 1 EIA 232 Specification Circuit Supported TXD TXC ST RXD RXC DSR DCD CTS LL RTS MC Driver Amplitude RXD RXC ST CTS DM DSR 0 Space ON True 1...

Page 338: ...A positive with respect to B Polarity RTS CTS DSR RLSD 1 True when 0 2V with respect to ground 0 False when 0 2V with respect to ground Phasing SCTE SCR 0 to 1 False to True transition nominally in ce...

Page 339: ...ive Data RS A RS B Request to Send RT A RT B Receive Timing CS A CS B Clear to Send DM A DM B Data Mode RR A RR B Receiver Ready TT A TT B Terminal Timing MC A MC B Master Clock MF Mod Fault ttl DF De...

Page 340: ...Specification Circuits Supported SD RD RTS CTS connected by break out panel Amplitude RD CTS 0 Space ON True 10V 5V 1 Mark OFF False 10V 5V Amplitude SD RTS 0 Space ON True Minimum 1V 1 Mark OFF False...

Page 341: ...nal minimum and maximum transmit power levels Changes in the power level shall not interrupt the carrier AUPC Target Noise Level The operator can select the Eb N0 target setpoint from 3 2 to 16 0 dB i...

Page 342: ...Receive BWA Output Enabled onto terrestrial secondary alarm 14 14 1 IBS Primary Data Interfaces G 703 Accepts and outputs primary data through the 50 pin connector using G 703 The data rate must be at...

Page 343: ...N 1 2 4 6 8 12 16 24 30 E1_CAS Terrestrial Framing Supported G 732 G 733 G 704 Satellite Overhead Rate 16 15 of data rate per IESS 308 Rev 6 and IESS 309 Rev 3 or higher Timeslot Selection Range 1 to...

Page 344: ...ering Service Channel ESC Audio 2 duplex ADPCM channels Audio Encoding CCITT G 721 Audio Interface Type 600 transformer balanced 4 wire Audio Input Level 20 to 10 dBm for 0 dBm 1 dB steps Audio Output...

Page 345: ...rresponding demultiplexing of RX satellite data received from the demodulator portion of the modem Resulting G 703 data is optionally encoded AMI B8Z5 or HDB3 before being output on the 50 pin connect...

Page 346: ...m to lock BIST Built in Self Test The modem has the ability to generate 2 11 1 2047 PN data and pass the data through the Interface Modulator and Demodulator sections of the modem The modem can genera...

Page 347: ...Remote Address The modem will have the ability to be programmed for a remote address This will range from 0 to 255 All other addresses are unique and should not have more than one modem assigned on a...

Page 348: ...interoperability modes that allow end to end operation with other modems in Closed Network modes Mode P300 DMD 2400 CM 701 FDC 1 CDM 550 CDM 600 Sequential BPSK 1 2 X X X X X X 2 QPSK 1 2 7 8 X X X X...

Page 349: ...formation FSK Transmitter Frequency 650 kHz 5 FSK Deviation 60 kHz nominal 60 kHz mark Deviation Tolerance 50 kHz minimum 70 kHz maximum Output Level 5 to 15 dBm Start Tone Time 10 ms minimum Output I...

Page 350: ...nd AGC Refer to BUC manufacturer specifications for reported power accuracy 15 1 1 Transmission Interface Each transmitted data packet consists of 7 bytes of information The BUC only accepts a command...

Page 351: ...hecksum error Bit 3 TX Status Bits 4 thru 7 Power Class 1 OOR 0 Normal 1 OOL 0 Normal 1 error in command message 0 Normal 1 TX ON 0 TX Off 0x1 to 0xf 6 Status Byte 2 Bits 0 3 Not used Bits 4 7 Softwar...

Page 352: ...SDM 300L3 Satellite Modem Revision 1 BUC FSK Communications MN SDM300L3 IOM 15 4 This page is intentionally left blank...

Page 353: ...link menu selection Commands and data are transferred on the remote control communications link as US ASCII encoded character strings The remote control port baud rates can be selected from 110 to 19...

Page 354: ...of Message Character A 2 1 Start Character A single character precedes all messages transmitted on the remote link This character flags the start of a message This character is for commands for respo...

Page 355: ...r lf Error message for received parity errors add ER2_invalid parameter cr lf Error message for a recognized command which cannot be implemented or has parameters which are out of range add ER3_unreco...

Page 356: ...Revision 1 Remote Control Operation MN SDM300L3 IOM A 4 A 2 4 End Character Each message is ended with a single character which signals the end of the message cr Carriage return character for commands...

Page 357: ...8PSK 2 3 OQ12 OQPSK 1 2Turbo and non Turbo OQ34 OQPSK 3 4 Turbo and non Turbo OQ78 OQPSK 7 8 BPSK BPSK1 1 Turbo and non Turbo QPSK QPSK 1 1 Turbo and non Turbo OQSK OQPSK 1 1 Turbo and non Turbo 2144...

Page 358: ...ETWORK FDC FAIRCHILD CLOSED NETWORK SDM51 SDM51 COMPATIBLE Modulator Encoder Type Command Response Status Response add MET_xxx cr add MET_xxx cr lf add MET_ cr add MET_xxx cr lf Where xxx VIT K 7 VITE...

Page 359: ...A steps A 3 2 Demodulator Configuration Commands Set Demodulator Frequency Command Response Status Response add DF_nnnnn nnnn cr add DF_nnnnn nnnn cr lf add DF_ cr add DF_nnnnn nnnn cr lf Where nnnnn...

Page 360: ...SWR_nnnnnn cr lf add SWR_ cr add SWR_nnnnnn cr lf Where nnnnnn 0 to 150000 in 1 Hz steps Sweep Reacquisi tion Command Response Status Response add SR_xxx cr add SR_xxx cr lf add SR_ cr add SR_xxx cr l...

Page 361: ...ace Configuration Commands Interface Transmit Overhead Type Command Response Status Response add ITOT_xxxxx cr add ITOT_xxxxx cr lf add ITOT_ cr add ITOT_xxxxx cr lf Where xxxxx NONE IDR IBS DI ASYNC...

Page 362: ...ommand Response Status Response add IBS _nnnnnn cr add IBS _nnnnnn cr lf add IBS _ cr add IBS _nnnnnn cr lf Where nnnnnn 32 to 262144 in 16 bit increments Interface Buffer Size Milli second Format Com...

Page 363: ...W_xxx cr add BW_xxx_nnn cr lf Where xxx TX1 TX2 TX3 TX4 RX1 RX2 RX3 or RX4 backward alarm designator nnn ON or OFF Drop Data Format Command Response Status Response add DDF_xxxxxx cr add DDF_xxxxxx cr...

Page 364: ...or the specified insert channel Notes 1 Time slot 16 cc 16 may not be specified when the insert data format is specified to be E1CAS 2 This command is not valid when the insert data format is specifie...

Page 365: ...cr lf Where xxxx ODD EVEN or NONE Note RX ASYNC Overhead only ASYNC Transmit Communica tions Type Command Response Status Response add TCT_xxxxxxxx cr add TCT_xxxxxxxx cr lf add TCT_ cr add TCT_xxxxx...

Page 366: ...dd 1 to 31 day yyyy 00 to 99 year in 2 digit year mode and 1975 to 1999 and 2000 to 2075 in 4 digit mode Remote Command Response add REM_ cr add REM_ cr lf Configures the modem for remote operation T...

Page 367: ...ode PWR Turn RF off on power up COMM Turn RF off on power up and loss of remote communications after 10 seconds CD Turn RF ON when carrier is detected turn RF OFF when no carrier is detected For the R...

Page 368: ...CL_xxxx cr lf Where xxxx HOLD NOM or MAX power level setting when remote carrier loss Note ASYNC or AUPC Overhead only Remote Modem AUPC Commands Notes 1 Always wait 3 seconds between consecutive remo...

Page 369: ...se Command Response Status Response add MTCP_x_yyy cr add MTCP_x_yyy cr lf add MTCP_x cr add MTCP_x_yyy cr lf Where x 1 to 8 tributary number yyy NRM normal clock phasing INV inverted clock phasing Mu...

Page 370: ...hannel Enabled for ASYNC RS422 S422 Channel Enabled for SYNC RS422 Note This command enables channel 3 for SYNC ASYNC RS232 RS422 operation AUPC operation or can be disabled TX Channel 3 Data Rate Com...

Page 371: ...nd Response Status Response add RCEN_3_xxxx cr add RCEN_3_xxxx cr lf add RCEN_3 cr add RCEN_3_xxxx cr lf Where xxxx OFF Channel Disabled AUPC Channel Enabled for AUPC A232 Channel Enabled for ASYNC RS...

Page 372: ...cr COM_xxxxxx cr MRC_xxx cr MSR_xxx cr RSEN_xxx cr TDA_xxx cr TRSI_xx cr T310_xxx cr ODU_xxx cr Note 1 ODUR_xxx cr Note 1 ODUL_xxxx cr Note 1 ODUH_xxxx cr lf Note 1 RF Output Modulator Frequency Non...

Page 373: ...dulator Output Power Scrambler Enable Differential Encoder Interface Loop Timing External Reference Frequency Transmit Clock Source Transmit Clock Phase Baseband Loopback Interface Loopback Interface...

Page 374: ...nn_mmmm mmm cr ADRV_nnnn_mmmm mmm cr DE_xxx cr DDEC_xxx cr IFL_xxx cr Note 1 SCF_snnnnn cr SWR_nnnnnn cr SR_xxx cr ERT_xxxx cr DT_xxxx cr DDT_xxx cr DSR_xxx cr RSDE_xxx cr RDA_xxx cr RRSI_xx cr R310_x...

Page 375: ...p Width Range Sweep Reacquisition Interface Loop Timing External Reference Frequency Buffer Clock Receive Clock Phase Baseband Loopback Interface Loopback Interface Coding Format Receive Interface Rec...

Page 376: ...CT_xxxxx cr Note 6 LPC_xxx cr Note 5 NOMP_snn n cr Note 5 Transmit Clock Source External Reference Frequency Transmit Clock Phase Receive Clock Phase Baseband Loopback Interface Loopback Interface Loo...

Page 377: ...s a block of data to be returned by the addressed MODEM The block reflects the current configuration of the interface Additional configuration status of new options and features will always be appende...

Page 378: ...t OK FLT IF Synthesizer Lock OK FLT I Channel OK FLT Q Channel OK FLT BER Threshold OK FLT Configuration OK FLT LNB OK FLT Number of stored faults logged 0 to 10 Interface Transmit Side Status Command...

Page 379: ...2 FLT OK RX Backward Alarm 3 FLT OK RX Backward Alarm 4 FLT OK Number of stored faults logged 0 to 10 A 4 5 Error Performance Raw BER Command Response add RBER_ cr add RBER_xm mE ee cr lf Where x or d...

Page 380: ...y returned if the Eb N0 has exceeded the computational resolution of the system 2 No Data is returned if the Eb N0 cannot be calculated 3 Sampling is returned if not enough data is currently available...

Page 381: ...has exceeded the computational resolution of the system 2 No Data is returned if the level cannot be calculated 3 Sampling is returned if not enough data is currently available to calculate the level...

Page 382: ...esizer OK FLT Data Clock Synthesizer OK FLT I Channel OK FLT Q Channel OK FLT AGC Level OK FLT Modem Reference PLL Lock OK FLT Modem Reference Activity OK FLT Configuration OK FLT Demodulator Stored F...

Page 383: ...ss MM DD YYYY cr M C_xxx cr INT_xxx cr BAT_xxx cr 5_xxx cr 12_xxx cr 12_xxx cr ST_xxx cr lf Monitor Control Module OK FLT Data Interface Overhead Module OK FLT Battery Clock OK FLT 5V Power Supply OK...

Page 384: ...Command Reference Description 1 2 3 4 5 6 7 8 Receive Signal Level ref RSL_ command Raw BER ref RBER_ command Corrected BER ref CBER_ command Interface Read Error Status ref IRES_ command EB N0 ref E...

Page 385: ...rate ref MR_ command Modulator preset A assignment ref ARMA_ command Modulator preset B assignment ref ARMB_ command Modulator preset C assignment ref ARMC_ command Modulator preset D ref ARMD_ comman...

Page 386: ...and Sweep reacquisition ref SR_ command BER threshold ref BERT_ command Demodulator type ref DT_ command Demodulator decoder type ref DDT_ command Transmit clock source ref TC_ command External refere...

Page 387: ...Interface Buffer Programming ref IBP_ command Interface buffer size ref IBS _ command Interface transmit overhead type ref ITOT_ command Interface receive overhead type ref IROT_ command Interface sub...

Page 388: ...Bulk Insert Channels Assignment Insert E1 CRC Enable ref ICRC_ command Modem Reference Clock ref MRC_ command Modulator Spectrum Rotation ref MSR_ command p53 n where n is 0 NONE 1 DATA or 2 AIS p54 n...

Page 389: ...RX4 ref BW_RX4_ command TX Driver Type ref TXDR_ command RX Driver Type ref RXDR_ command reserved null field ASYNC TX Overhead Baud Rate ref TOBR_ command ASYNC RX Overhead Baud Rate ref ROBR_ comma...

Page 390: ..._ command AUPC Max Tracking Rate ref MAXT_ command AUPC Local Carrier Loss ref LCL_ command AUPC Remote Carrier Loss ref RCL_ command reserved null field reserved null field Transmit BPSK Data Orderin...

Page 391: ...command IBS RX ESC Type ref IBSR_ command TX Reed Solomon Interleave Value ref TRSI_ command RX Reed Solomon Interleave Value ref RRSI_ command reserved null field reserved null field reserved null fi...

Page 392: ...ed if RX Overhead is programmed for IDR IBS Comma is always returned 5 Data will only be returned if TX Overhead is programmed for ASYNC Comma is always returned 6 Data will only be returned if RX Ove...

Page 393: ...Bit 5 Modem Reference PLL Lock Bit 4 reserved Bit 3 Configuration Bit 2 Modem Reference Activity Bit 1 reserved Bit 0 reserved Character d Demodulator fault status character 1 Bit 6 1 always Bit 5 Dem...

Page 394: ...1 reserved Bit 0 Configuration Character m Interface receive side faults character 4 Bit 6 1 always Bit 5 RX Audio Channel 1 Clip Bit 4 RX Audio Channel 2 Clip Bit 3 reserved Bit 2 reserved Bit 1 rese...

Page 395: ...oll B BCSF_ response has changed since last BCSF_ poll C Both responses have changed since last BCS_ and BCSF_ polls This command indicates that a change has or has not occurred on either the BCS_ or...

Page 396: ...etrical Loop Timing or Viterbi Encoder Decoder or Sequential Encoder Decoder or Single Code Data Rate or Low Rate Variable or Full Rate Variable x or Card 1 Installed x or Card 2 Installed x or Card 3...

Page 397: ...s TCP accelerationC cr s Data encryption cr s Data compression cr s QOS cr s NAT cr s Bridging cr s IGMP cr s Header compress cr lf or or or or or or or or or Notes 1 Card 1 Installed Only 2 s Not Ins...

Page 398: ...000000000 to 999999999 Notes 1 Data is only returned if Card 1 is installed 2 Data is only returned if Card 2 is installed 3 Data is only returned if Card 3 is installed State Of Product Command Resp...

Page 399: ...lowed by a clock training sequence for 352 clock cycles A 31 bit unique word is then transmitted At this time the CTS line will go false The next bit of data into the modem will be the first bit trans...

Page 400: ...nput data streams but double sided about the carrier frequency The RF synthesizer provides the proper frequencies to convert the modulator IF to the desired output frequency in the 50 to 180 MHz range...

Page 401: ...erence SCT RX Bit Clock and IF output are locked to the Frequency Reference Internal Standard Stability over the operating temperature range 10 PPM Internal High Stability Optional Stability over the...

Page 402: ...d spurious from 0 to 0 75 x symbol rate is 42 dBc or lower B 2 9 Transmit IF Output Switch When set to off no signal present at the output is greater than 60 dBm measured in a 3 kHz bandwidth from 0 t...

Page 403: ...emissions measured in a 3 kHz bandwidth at the transmit IF output are 0 to 500 MHz 5 to 30 dBm 55 dBc 0 to 500 MHz 5 to 20 dBm 64 kbps 50 dBc 0 to 500 MHz 5 to 20 dBm 64 kbps 45 dBc B 2 14 Modulator...

Page 404: ...SK and uncoded At the end of the preamble the modulator shall cause CTS to transition from false to true This signals the baseband equipment to begin sending data The RF carrier shall remain on until...

Page 405: ...Field Changeable Plug in Modules One Interface per Module RS 422 449 on 37 pin D MIL STD 188 on 37 pin D V 35 on 25 pin D or 34 pin block RS 232 on 25 pin D Digital Data Rate QPSK 1 2 Rate QPSK 1 2 R...

Page 406: ...l Input Return Loss 20 dB Carrier Acquisition Range 4 kHz minimum Clock Acquisition Range 100 PPM Acquisition Time 30 ms Directed Sweep N A Remote Control Specifications Serial Interface RS 485 449 ba...

Page 407: ...103 1 609 x 103 1 609 1 mm 0 03937 1 kilometer 0 621 Temperature Conversions Units of Weight Unit Gram Ounce Avoirdupois Ounce Troy Pound Avoir Pound Troy Kilogram 1 gram 0 03527 0 03215 0 002205 0 0...

Page 408: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...

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