IZT C3040. Description. Version IZT S1000 Version: 1.00 Description Date : C3040_Description-V1_0.doc by Rainer Perthold

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1 IZT C3040 Description Version , IZT GmbH i

2 IZT C3040 Version: 1.00 Date Version Description Author Initial version pth ii 2012, IZT GmbH

3 1. Introduction Functionality Digital Processing Delay Ionosphere IMUX and OMUX Filters Noise and Interference IF Filter Simulation Phase Noise Nonlinearity Fading Control Software Graphical User Interface Analog Modulation and Broadcast Real-time Modulation Communication Standards Frequency Hopping Module Remote Control Specifications Supply Voltage Mechanical characteristics Environmental specifications , IZT GmbH iii

4 IZT C3040 Version: Introduction The channel simulator IZT C3040 is the successor of the IZT DCS3020. It offers a higher instantaneous bandwidth of 100 MHz, more flexibility in terms of RF modules and an enhanced feature set. The available features were grouped into uplink, payload and downlink effects. Some features are available twice to reproduce a realistic transmission chain. The following impairments are available to the user. Effects of the uplink include: Delay and delay change over time Doppler simulation Effects of the ionosphere Interference by other signals Within the payload of the satellite the following effects are introduced: IMUX filtering Nonlinearity (AM/AM and AM/PM) caused by the amplifier Phase noise OMUX filtering On the downlink, from the satellite to the terminal the signal then changes by: Effects of the ionosphere Large and small scale fading Interference by other signals Thermal noise Due to its sophisticated auto-calibration and high-performance RF converter, which it shares with IZT's high performance receivers and signal sources the IZT C3040 features an excellent signal quality. 4 von , IZT GmbH

5 figure 1: C3040 Digital Processing 2012, IZT GmbH 5 von 15

6 2. Functionality 2.1. Digital Processing The IZT C3040 uses modern FPGA technology to perform the digital signal processing. After digitization with 320 MSsamples/sec. the signal is converted to complex baseband and subsequent processing is done at 160 MSamples/sec. (complex). To account for spectral re-growth, the nonlinearity simulation is performed to 320 MSps Delay The IZT C3040 can simulate a continuously variable delay of up to 800 milliseconds. After an initial setting, it s variation is tied to the Doppler simulation of the link. It is continuously variable to simulate actual satellite movement. Variations will resemble a linear increase of distance between transmitter and receiver Ionosphere As an option, the C3040 provides a simulation of the time-dispersive effect of the ionosphere both on uplink and downlink. It is controlled by the user specifying the Total Electron Content and the actual frequencies used on uplink and downlink. The conditions of the ionosphere can be altered while the simulation is running. 6 von , IZT GmbH

Emulation of the Ionosphere with IZT C30

7 figure 2: IZT C3040 Gain and Group Delay Flatness figure 3: Emulation of the Ionosphere with IZT C IMUX and OMUX Filters The IZT C3040 provides two FIR filter with 128 complex, non-symmetric coefficients each to simulate the satellite IMUX and OMUX filters. The user may either specify the filter coefficients directly or provide a complex frequency responses, which will be transformed into a FIR filter by the C3040 control software. 2012, IZT GmbH 7 von 15

8 IMUX and OMUX are independent and assumed to be fixed during the simulation. figure 4: IZT C3040 MUX Filter Noise and Interference Behind the IMUX filter and at the very end of the simulation chain, two independent noise sources and two independent arbitrary waveform generators are available. The power spectral density of the noise source can be controlled by the user as a function of frequency. In order to set a defined C/N, a power detector measures the signal power passing through the IMUX filter. The arbitrary waveform generator holds up to 1 GByte (256 Megasamples) of data. Its output power is adjustable. The sample rate is variable up to the full bandwidth of the IZT C IF Filter Simulation The IZT C3040 can be equipped with an additional FIR Filter (complex, non-symmetric) with 4096 coefficients. The impulse response has a maximum duration of 25.6 usec. It can be used to model analog distortions in the payload IF filter, for example triple transit in a surface acoustic wave filter Phase Noise The IZT C3040 supports an accurate phase noise simulation with up to 10 MHz bandwidth. The user can specify a desired frequency response or mask which will the be pre-calculated. The total (RMS) phase modulation is adjustable during the simulation. Phase Noise 8 von , IZT GmbH

9 The IZT C3040 can simulate the phase noise introduced by the local oscillator in the satellite. The user has to specify a mask (noise power density vs. frequency) and can then adjust the amount of phase perturbation introduced by the simulator. As an example, the phase noise profile for DVB-S2 typical is shown in figure 5. Required phase noise mask: Hz khz khz khz MHz -114dBc/Hz@ >10 MHz figure 5: Measurement result of simulated phase noise DVB-S2 typical Nonlinearity The IZT C3040 can simulate a memoryless distortion (AM/AM and AM/PM) as it would be introduced by the amplifier in the payload. The user specifies the data as complex gain versus input power in tabular format. The nonlinearity table contains 1024 complex coefficients as a function of amplifier input power. Linear interpolation is used between adjacent table entries. RMS and peak power detectors at the input and output of the nonlinearity simulation give the user the necessary feedback about the current operating point of the nonlinearity simulation. 2012, IZT GmbH 9 von 15

figure 6: Emulation of Payload Nonlinearity 2.1.8.

10 figure 6: Emulation of Payload Nonlinearity Fading To simulate rain fades or scintillation, the IZT C3040 has the capability to weigh the signal with a complex fading coefficient which is continually streamed from RAM or the control software. 10 von , IZT GmbH

11 3. Control Software 3.1. Graphical User Interface For the different markets, IZT is offering different tools for generating test files and controlling the S Analog Modulation and Broadcast The offline IZT IQ Generator Toolbox generates test files for all major broadcast standards: FM-RDS AM DAB / DAB+ DVB-T DMB DRM/ DRM+ HDRadio Input data can be a full multiplex or raw content material Real-time Modulation Real-time modulation has been implemented for SiriusXM Satellite Radio, generating six QPSK and two COFDM modulated signal simultaneously Communication Standards For applications in COMINT/SIGINT, typical communication signals are supported: ASKn, PSKn (single and multi channel), QAMn (single and multi channel), 2012, IZT GmbH 11 von 15

12 ASKnPSKm (single and multi channel) NCPFSKn FSKn (single and multi channel) MSK (single and multi channel) GMSK (single and multi channel) F7B TFM3 TFM5 AM, NFM, SSB (from.wav files) Signal parameters can be selected by the user: Attenuation Center Frequencies Baud Rates Degree / subtypes /version Pulse shapes (RC, RC/RRC, Gauss) Burst Parameters Different coding schemes are available: Binary, Baudot, ASCII, HC ARQ, ITA2 Differential/absolute coding Convolutional encoding CCITT standards V.17 V.33 variable bit stream, bit order, parity various scrambling algorithms 12 von , IZT GmbH

13 Frequency Hopping Module The Frequency Hopping Module utilizes the profile functionality of the S1000 to generate hopping networks in a very efficient manner. The content is supplied by the user as narrow band IQ data. Spread: up to 120/240MHz Hop rate: >2000 hops/sec. Channel spacing: user settable Pattern: regular or random within user-defined channel list or sequence of channels / frequencies defined by user Number of hoppers: up to 31. One hopper requires one VSG (two VSGs with 240MHz spread). Content: IQ-data, generated by Analogue Modulation Tool or user-supplied content The IZT C3040 has an easy to use graphical user interface which can be operated on the built-in front panel display or remotely on an external PC. figure 7: Top level GUI page 3.2. Remote Control All commands, settings and parameters accessible via the C3040 GUI can also be controlled remotely via SCPI commands. The GUI will reflect any changes while they occur. 2012, IZT GmbH 13 von 15

14 4. Specifications 4.1. Supply Voltage Input voltage range Maximum input current AC supply frequency Input current in standby operation 100 VAC 240 VAC 4.0 A (100V) 46 Hz to 60Hz 0.1 A (100V) Table 1 Supply Voltage specifications 4.2. Mechanical characteristics Width Depth Height Weight 482 mm 569 mm 132 mm 14 kg Table 2 Mechanical characteristics 4.3. Environmental specifications Ambient temperature range 0 C 50 C Operation 14 von , IZT GmbH

15 Ambient temperature range -40 C 70 C Storage Humidity operation: 5 % 95 % noncondensing storage: 5 % 99 % non-condensing Altitude range (m) Operation 2000 m Table 3 Environmental specifications 2012, IZT GmbH 15 von 15

IZT S1000 Version: 1.02 Description Date : S1000 Description.doc by Rainer Perthold IZT S1000. Description. Version 1.02.

IZT S1000 Version: 1.02 Description Date : S1000 Description.doc by Rainer Perthold IZT S1000. Description. Version 1.02. IZT S1000 Description Version 1.02 2011, IZT GmbH i ii 2011, IZT GmbH 1. Introduction The S1000 with its revolutionary architecture and IZT s patented signal processing algorithm enables the user to consolidate