DTE-3114 Networked Quad QAM Modulator USER MANUAL Augustus 2014
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Table of Contents 1. Introduction ............................................................................................................................4 1.1 General description ...........................................................................................................4 1.2 Block diagram ...................................................................................................................4 1.3 Applications...............
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 4.3 IP jitter .............................................................................................................................28 5. Specifications ........................................................................................................................30 5.1 Network connection .........................................................................................................30 5.2 Transport-Stream input over IP...........
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 1. Introduction 1.1 General description The DTE-3114 is a compact four-channel QAM modulator with Transport Stream over IP (TSoIP) inputs and a directly synthesized VHF/UHF output. The device can operate in DVB-C, J.83 Annex B and J.83 Annex C mode, with support for the various QAM constellations and interleaver modes.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL selected QAM standard and mode. Channel filtering is applied and the resulting QAM-modulated signal is digitally upconverted to an RF carrier in the VHF or UHF band. The outputs of the four channels are added to each other, optionally with a plus or minus 3dB RFlevel correction per channel. The result is converted to analog, amplified with an adjustable gain and put on the RF output. A second output with a fixed level is provided for monitoring purposes.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Conditional access Not supported. Multiplexing SPTS to MPTS multiplexing is not supported. VBR Only CBR streams are supported. 1.5 List of Abbreviations auto-MDIX Automatic medium-dependent interface crossover. Technique to automatically detect the type of network cable: straight-through or crossover. CATV Cable Television CBR Constant Bit Rate DHCP Dynamic Host Configuration Protocol.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL RTP Real-time Transport Protocol TSoIP Transport Stream over IP UDP Unreliable Datagram Protocol UHF Ultra High Frequency band, officially ranging from 300MHz to 3GHz, but in the context of cable television from 300MHz to 1GHz.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 2. Installation 2.1 Physical layout 1. LCD display The LCD display indicates the device identifier and device status information. 2. Main RF output F female connector, 75 Ohm impedance. 3. Monitor RF output F female connector, 75 Ohm impedance. 4. Reset button Button that can be operated with a paper clip. The function is to reboot the DTE-3114, or enter failsafe mode if held pressed for more than three seconds. 5.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 2.2 LCD display The LCD display contains the following information: 1. Device identifier Programmable from the web and SNMP interface. 2. Active channels Number of channels that have been enabled. If no channels are active, “Idle” is displayed. 3. Mode QAM mode and modulation standard. 4. RF level Total output power level in dBm. 5. Frequency Carrier frequency of each channel in MHz. 6.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 2.3 Hardware installation Rail-mount system The rail-mount system can be used to mount the DTE-3114 on a DIN rail (TS32, TS35). The rail can be mounted directly on a wall, or the DekTec 19”-rack-mountable rail can be used to install up to 12 DTE modules in 3U-height 19” rack space. Special consideration is required to avoid overheating of the unit, see section 2.4.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL If the reset button is hold down for more than three seconds, the DTE-3114 will enter failsafe mode, see section 2.6. 2.4 Thermal considerations The DTE-3114 is designed to operate with cooling by natural convection, without active cooling facilities. However, the following considerations have to be taken into account: The unit must always be mounted vertically to allow bottom-to-top airflow.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL How to reach a DTE-3114 with IP address 169.254.x.x? This problem may occur in a network with statically assigned IP addresses, without DHCP server. The DTE-3114 has assigned itself a link-local address 169.254.x.x. However, the browser PC has a static IP address that will most likely reside on a different subnet.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL C:\>route print =========================================================================== Interface List 0x1 ........................... MS TCP Loopback interface 0x2 ...00 14 f4 00 00 2b ...... DekTec DTA-160 Gigabit Ethernet Port 0x3 ...00 1c c0 38 60 33 ......
DTE-3114 – Networked Quad QAM Modulator USER MANUAL DTE-3114, so one of them should be deleted. To remove the link-local route through 192.168.100.28, use the following command: route DELETE 169.254.0.0 MASK 255.255.0.0 192.168.100.28 This will result in a correct routing table. 2.6 Failsafe mode The DTE-3114 supports a special “failsafe” mode to enable recovery from an erroneous configuration.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 2.7.3 Network Settings IP address Display ID SNMP agent obtain through DHCP disabled SNMP SNMP SNMP SNMP SNMP SNMP public private disabled 0.0.0.0 public 162 read community write community traps trap destination trap community trap Port 2.7.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 3. Device Configuration and Monitoring 3.1 Control interfaces The DTE-3114 can be configured and monitored in two ways: Through a web-based front end (“web GUI”), see section 3.3; Using SNMP, see section 3.4 The web GUI is intended for human interaction with the DTE-3114, while SNMP is aimed at automated management and control by a Network Management System. The two control interfaces, web and SNMP, can be used in parallel to each other.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Variable Device status Synchronise settings Description Web SNMP Reflects the status of the device: Normal operation. The device is working properly. Hardware error. A serious and fatal error has occurred in the hardware. The DTE-3114 cannot be used and should be returned to the supplier. Channel error. One or more of the four QAMmodulator channels is in an error state. See “Channel operational status” in section 3.2.5. Temperature error.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Variable Description Web SNMP Enable Community Enable or disable generation of SNMP traps The SNMP agent will insert this string in traps to act as an elementary password R/W R/W R/W R/W Destination IP address Destination IP port IP address where SNMP traps are sent to R/W R/W IP port number where SNMP traps are sent to NA R/W SNMP traps 3.2.3 SMPTE Settings Parameters that control the reception of IP streams.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Variable Symbol rate Interleaver I Interleaver J RF level RF level offset Settings status Description Web SNMP The symbol rate of the channel Interleaver parameter I Interleaver parameter J The median desired RF output level per channel. For each of the 4 channels, a small offset can be specified relative to this level The desired offset (-3 ..
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Variable Web SNMP NA RO IP jitter error counter Counter that keeps the number of times that the jitter of an IP packet exceeds the IP jitter tolerance for this channel Lock error counter Counter that keeps the number of channel restarts. A channel restart may occur in the following cases: The bitrate of the incoming IP stream changes. The jitter on the incoming IP packets exceeds the IP jitter tolerance for this channel.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 3.3.2 Web GUI – Colour-coding scheme The fields on the web pages use a color-coding scheme to guide the user: Yellow Status field: measured value or status Light blue Status field: shows value/status of a setting that can be set at another location Light green Input field Orange Input field, error in setting Dark green Input field; User has changed the setting, but not applied it yet.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 3.3.4 Web GUI – Error handling When parameters are changed on one of the settings pages, these changes are not immediately propagated to the DTE-3114. Only when the Apply button is pressed, the settings are actually put into operation. If the settings contain an error, or multiple errors, the Apply button is grayed out. Fields related to the error turn orange.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 3.4.2 SNMP – Actual and desired settings The DTE-3114 uses a special mechanism for dealing with erroneous combination of parameters, using “actual” and “desired” settings. Actual settings The set of parameters that is currently active. By design, the actual settings are always valid, because invalid parameter values are never propagated to the actual settings. SNMP read and write requests operate on the desired settings.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL ID Settings error Description / Remarks 2. Port is not valid The selected port number is not valid (1 .. 65535). 3. 4. IP-to-RF delay is out of range Port numbers overlap 5. FEC settings are not equal for all channels The valid range is 0 .. 120ms.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL ID Settings error J is invalid 16. RF-level range is too wide 17. Spectrum overlaps spectrum of another channel 18. SMPTE settings are not consistent Description / Remarks according to J.83 Annex B. The difference between the largest RF level and the lowest RF level is more than 6dB. Spectrum overlap causes interference and is not allowed. 3.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 4. System Configuration 4.1 General For proper operation of the DTE-3114 a system integrator has to take into account two essential factors: 1. Bitrate of the IP streams 2. IP jitter Ad 1. A QAM signal has, depending on the selected modulation parameters, a certain bitrate capacity. If the bitrate of the incoming IP stream exceeds this capacity, internal buffer overflows may occur in the DTE-3114 and no sustainable reliable operation is possible. Ad 2.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 128-QAM 256-QAM Symbol rate (MBd) Bandwidth (MHz) Bitrate (Mbps) 4.48* 5.15 28.900392 6.875 6.89 7.91 7.92 44.350490 44.447255 6.90 6.92 6.95 4.48* 6.875 6.89 6.90 6.92 7.94 7.96 7.99 5.15 7.91 7.92 7.94 7.96 44.511765 44.640784 44.834314 33.029020 50.686275 50.796863 50.870588 51.018039 6.95 7.99 51.239216 * Not a typical DVB-C bitrate. This is the minimum symbol rate that can be handled by the DTE-3114. ITU-T J.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL For proper operation of the DTE-3114, the system integrator must take care that the input bitrate of each incoming Transport Streams is somewhat below the nominal bitrate at all times. Due to small frequency deviations between the clocks of the transmitter and the DTE-3114, which are inevitable, a minimum margin of 100ppm must be reserved. For example, if the DTE-3114 is configured for DVB-C in 256-QAM mode and a symbol rate of 6.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL RxIpJitterErrorCounter, not visible in the web page) and will result in lock errors (increment of nwRxLockErrorCounter and visible on the IP status webpage). After a lock error the channel will restart, resulting in a short interruption of the output.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 5. Specifications 5.1 Network connection Min Network Port Standard Data rate Connector Power over Ethernet PoE class Control Ethernet encapsulation IP version IP-address assignment Multicast support Network management MIBs Discovery Typ Max IEEE 802.3af 10/100/1000 auto detect RJ-45 with LEDs Power over Ethernet Mbps Class 0 IEEE 802.2 SNAP and Ethernet II IPv4 DHCP or static IGMP v2 SNMP v2c, MIB II, DTE-MIB, DTE-QAMMOD-MIB WS Discovery 5.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Min RTP FEC Transport-Packet size TS packets / IP packet FEC size: L FEC size: D FEC size: LxD (1) (2) Typ Max SMPTE 2022-1-2007 188 or 204 1 1 4 7 20 20 100 bytes No long UDP packets Excludes interleaver delay Depends on input bitrate, FEC matrix size and number of TS packets per IP packet 5.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 5.4 Modulation Min QAM-A Standard Constellations QAM-B Standard Constellations Interleaver modes QAM-C Standard Constellations Symbol Rate Range(6) Resolution MER (equalised) Spectrum flatness (1 channel) Shoulder attenuation (6) Typ Max EN 300 429 32/64/128/256-QAM ITU-T-J.83 Annex B 64/256-QAM All I, J defined in ITU-T-J.83 1997-04, Table B.2 ITU-T-J.83 Annex C 32/64/128/256-QAM 4.48 6.9 1 7.0 43 ±0.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Min Mechanical Mounting Dimensions W x H x D Weight (7) (8) Typ Max DIN-rail TS35, TS32 34 x 133 x 133 34 x 133 x 155 324 340 Pending formal validation By design; no formal UL qualification 33 mm (no clicker) mm (with clicker) g (no clicker) g (with clicker)
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Appendix A. DTE-MIB DTE-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, enterprises, IpAddress, TimeTicks, Counter32, Integer32, Unsigned32, Counter64 FROM SNMPv2-SMI OBJECT-GROUP, NOTIFICATION-GROUP FROM SNMPv2-CONF; main MODULE-IDENTITY LAST-UPDATED "201302180800Z" ORGANIZATION "DekTec Digital Video B.V." CONTACT-INFO " Godelindeweg 4 1217 HR Hilversum The Netherlands Phone: +31 35 2030100 E-mail: info@dektec.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL 0 1 disable temperature-alarm trap generation enable temperature-alarm trap generation" ::= { temperature 2 } tmpAlarmValue OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-write STATUS current DESCRIPTION "Threshold temperature in tenths of degrees Celsius. If the internal device temperature exceeds this threshold, trap 'trTemperatureError' is generated (if enabled).
DTE-3114 – Networked Quad QAM Modulator USER MANUAL ::= { device 7 } devWatchdogCounter OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "Counter that keeps the number of times the processor is restarted because of a watchdog alarm." ::= { device 8 } devPowerCycleCounter OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "Counter that keeps the number of power cycles.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL -- Group: network ----- The network group holds the network receive and transmit channels ----- Receive channel: --- Abstraction for a process that receives a transport stream from the --- IP network, and outputs the transport stream to a 'sink' interface, --- e.g. an ASI output port. ----- Transmit channel: --- Abstraction for a process that transmits a transport stream to the --- IP network, with input coming from a 'source' interface, e.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL The value ranges between 1 and the value of 'nwRxNumberOfChannels'.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL specific-multicast join. If the addressing method is unicast or any-source-multicast this field is ignored." ::= { nwRxEntry 8 } nwRxFecEnable OBJECT-TYPE SYNTAX INTEGER { disable(0), enable(1) } MAX-ACCESS read-write STATUS current DESCRIPTION "Enable or disable FEC reconstruction.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL ::= { nwRxEntry 15 } nwRxIpLostBeforeFec OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets lost before FEC reconstruction." ::= { nwRxEntry 16 } nwRxIpLostAfterFec OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of packets lost after FEC reconstruction.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL SYNTAX INTEGER { auto(0), autoIgnorePcrs(1), delay(2), off(3) } MAX-ACCESS read-write STATUS current DESCRIPTION "Mode used to estimate the transport-stream bitrate. 0 auto 1 ignore pcrs 2 fixed delay 3 off" ::= { nwRxEntry 24 } --nwRxTsManualRate OBJECT-TYPE -SYNTAX Integer32 -MAX-ACCESS read-write -STATUS current -DESCRIPTION -"User-specified rate of the received transport stream. Used if -nwRxTsRateEstimationMode is set to 'manual'.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL ::= { nwRxEntry 30 } ---------------------------------------------------------------------------- Group: network - nwTxChannels ---------------------------------------------------------------------------nwTxNumberOfChannels OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "Number of network transmit channels available on this device.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL ::= { nwTxEntry 3 } nwTxChannelEnable OBJECT-TYPE SYNTAX INTEGER { disable(0), enable(1) } MAX-ACCESS read-write STATUS current DESCRIPTION "Enable or disable this channel. 0 disable the channel 1 enable the channel" DEFVAL { disable } ::= { nwTxEntry 4 } nwTxIpAddress OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-write STATUS current DESCRIPTION "Destination IP address. ::= { nwTxEntry 5 } The generated IP stream will be sent to this IP address.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL nwTxFecNumberOfColumns OBJECT-TYPE SYNTAX Integer32 (0..20) MAX-ACCESS read-write STATUS current DESCRIPTION "Number of FEC columns to generate." ::= { nwTxEntry 12 } nwTxIpAddressStatus OBJECT-TYPE SYNTAX INTEGER { ok(0), error(1) } MAX-ACCESS read-only STATUS current DESCRIPTION "Destination IP-address resolve status.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL devSystemGroup OBJECT-GROUP OBJECTS { devType, devSerialNumber, devHardwareRevision, devFirmwareVersion, devPowerStatus, devDisplayName, devNetworkLinkSpeed, devWatchdogCounter, devPowerCycleCounter, devSynchroniseSettings, devStatus } STATUS current DESCRIPTION "A collection of objects providing system information.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL nwTxTypeOfService } STATUS current DESCRIPTION "A collection of objects providing network transmit information." ::= { groups 5 } devAlarmTrapGroup NOTIFICATION-GROUP NOTIFICATIONS { trTemperatureError } STATUS current DESCRIPTION "A collection of objects providing alarm trap information.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL Appendix B. DTE-QAM-MIB DTE-QAMMOD-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, enterprises, IpAddress, TimeTicks, Counter32, Integer32, Unsigned32, Counter64 FROM SNMPv2-SMI OBJECT-GROUP, NOTIFICATION-GROUP FROM SNMPv2-CONF; qammod MODULE-IDENTITY LAST-UPDATED "201302180800Z" ORGANIZATION "DekTec Digital Video B.V.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL STATUS current DESCRIPTION "Number of QAM-modulator channels available on this device." ::= { outputs 1 } outTable OBJECT-TYPE SYNTAX SEQUENCE OF OutEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of QAM-modulator channel entries.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL outModulationStandard OBJECT-TYPE SYNTAX INTEGER { dvbc(0), j83AnnexB(1), j83AnnexC(2) } MAX-ACCESS read-write STATUS current DESCRIPTION "Modulation standard used for this channel. 0 dvb-c (j83-annex-a) 1 j83-annex-b 2 j83-annex-c" ::= { outEntry 6 } outQamMode OBJECT-TYPE SYNTAX INTEGER { qam32(5), qam64(6), qam128(7), qam256(8) } MAX-ACCESS read-write STATUS current DESCRIPTION "QAM mode (number of constellation points) used by this channel.
DTE-3114 – Networked Quad QAM Modulator USER MANUAL List of status codes: 1 - Modulation standard is invalid 2 - QAM mode is invalid 3 - Symbol rate is out of range 4 - Interleaver I is out of range 5 - Interleaver J is out of range 6 - Frequency is out of range 7 - Overall spectrum cannot be wider than 32 Mhz 8 - Channel frequencies must increase monotonically 9 - RF level is out of range 10- Modulation standards are not equal for all channels 11- QAM modes are not equal for all channels 12- Spectral inve
