SPECIFICATIONS FOR HIGH DATA RATE DEMODULATORS

Sl No / Parameter / Specification
Input IF frequency / Configurable for 720 MHz ± 190 MHz
Modulation schemes / BPSK, QPSK, UQPSK, OQPSK, 8 PSK Selectable
Dual Demodulation usingTwo separate IF inputs / No degradation in BER performance with this feature
Maximum Bit rate (BR) capability in each IF @720MHz / BPSK : 320 Mbps
QPSK, UQPSK, OQPSK : 640 Mbps
8 PSK : 960 Mbps
Capability for higher bit rates / The basic unit should have the provision to get upgraded higher data rates (continuous programmability is essential). The up gradation is preferred to be done at user site.
IF bandwidth / Automatically adjusted from the Bit rate
AGC Dynamic range / -50 dBm to –10 dBm
Input impedance / 50 Ohms
VSWR / < = 1.40
Carrier Acquisition range / Selectable up to +/- 1 MHz
Doppler rate / Up to 10 KHz/sec
Acquisition time / < 300 msec
Clock acquisition range / ±0.1% of the symbol rate
Clock duty cycle / 50% nominal (tolerance +/-10%)
Threshold BER performance / Within 1.5 dB from theory @1X10-6 BER performance for all required modulation schemes.
Decoding as per the CCSDS Standard (Programmable) / 1. Differential decoding.
2. Viterbi (Convolutional) Decoding- Single & Dual decoders.
3. 4D-TCM (Multi-Trellis Coded Modulation) decoding
4. LDPC 7/8 Decoding
5. Enable/Disable of all the above Decodings.
Output data and clock signals (Programmable) / Dual Demodulators Mode :
I Data & respective Clock for BPSK ;
I, Q, I +Q Data & respective clocks for QPSK ;
Three data streams (I, Q, Z) a clock for 8PSK.
Single/ Dual Demodulator Mode :
Three data streams and three independent clocks (I, Q, Z) for 8PSK.
Output signals on separate connectors(Selectable). / 1.I data & I clock: Normal, Inverted
2.Q data & Q clock: Normal, Inverted
3. Z data & Z clock: Normal, Inverted
Output logic / ECL & LVDS interface for all output data & clock signals.
Position of clock rising edge / Clock signals that are in synchronous with data transitions and in middle of data transitions, both on independent connectors (either normal or differential –ve clock should be in phase with data transition).
Data format / Selectable from NRZ-L, NRZ-M, NRZ-S.
Capability for onsite upgradations to meet future requirements / The basic unit should have the provision to get upgraded (software) for future requirements at site:
  • Digital Equalization Adaptive Filtering(DEAF)

Input Connectors / SMA (F); Each IF input should have an alternate connector which can be selected from the GUI.
Output connectors / SMA(F) for ECL ;
RJ45 for LVDS
Monitoring and Control / Configuration of required parameters as given in the table - locally through GUI on front panel of the unit and remotely via TCP/IP interface.
Provision for display of Input signal spectrum and output constellation.
Instantaneous IF level, Eb/No display and BER display on screen
Supply voltage / 230V AC +/-10%, 50 +/- 3 Hz Single phase
Power Cord Connector / 3-round pins Plug as per current Indian standards (Grounded BS-546)
Operating temperature / 10 ° C to 40 °C.
Storage temperature / -10 ° C to 60 °C
Size / Up to 4U size and
19-inch Rack mountable with Telescopic slides.
Ethernet Ports / Dual Giga bit.
Interfacing cables for Data & clock outputs / 12” SMA (M) - BNC (F) cable assemblies for interfacing all the data and clock inputs to/fromrespective external cables.
Warranty / Standard Warranty (minimum one year) should be provided.Extended Warranty per year per system can be quoted seperately. Support and Service to be provided at Site (both for standard warranty and opted extended warranty)
Instruction manual (operation & maintenance) / A set of hard copy and soft copy (CD/DVD) to be supplied along with each equipment.

OTHER TERMS AND CONDITIONS (TECHNICAL)

  1. Vendor must submit “Letter of Authorization” from manufacturer else quote would not be considered.
  2. List of Indian & International ground stations where the quoted equipment is currently operational.
  3. Reliability/ performance report for real time data reception at the above mentioned ground station (specifically for IRS series of satellites like Cartosat-1, Cartosat-2/2A/2B/2C,RS-2, SARAL,RISAT-1 etc.)
  4. Quotations should be submitted with technical compliance statement for all the specifications along with the detailed data sheets/ catalogues. Relevant remarks can be provided in the compliance statement if required. Quotations without technical compliance and data sheets/catalogues will not be considered.
  5. The equipment should be industrial and EMC/EMI (IEC/EN 61326 standard or equivalent) proven and certified. It should also withstand transport vibrations.
  6. The systems should not be absoletedup to 10 years at least i.e. the support, service and up gradation to be available during this period.

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