Transmitter. 4.6.1. Seller has a valid, binding and enforceable leasehold interest, which is free and clear of all Liens except for Permitted Liens, in and to the Leased Transmitter Site.
4.6.2. Seller has not received any notice of, and has no knowledge of, any material violation of any zoning, building, health, fire, water use or similar Law in connection with the Leased Transmitter Site. To the knowledge of Seller, no fact or condition exists which would result in the termination or impairment of access of the Station to the Leased Transmitter Site or discontinuation of necessary sewer, water, electrical, gas, telephone or other utilities or services.
Transmitter. The transmitter converts the digitized output waveform, received from the base radio controller via the dedicated high speed serial link, into a high power RF signal. The transmitter includes a 800 MHz band linear power amplifier. The linear 350 Xxxxx PEP power amplifier provides 60 dB IMR and is rated for 70 Xxxxx average continuous duty. The high level of linearity is achieved with a double conversion feedback design using a number of custom integrated circuits. The transmit frequency is controlled through the on-board synthesizer. The BRC is used to perform thermal derating, transmitter initialization, power control loop leveling and synthesizer loading. This module includes fans for thermal management.
Transmitter. Power Output: Standard Power +* dBm minimum * mW) at antenna port High Power +* dBm minimum * mW) at antenna port Frequency Stability: Over Temperature: * ppm Years 1 to 4 * ppm Years 5 to 10 * ppm 10 year period total * ppm Transmitter Mute: * dB when loss of lock Modulator or Synthesizer Attenuation Range: * dB via P.C. software Intermediate Frequency: * MHz Composite Data Rate: 1 x 2.048 Mb/s * Mb/s 2 x 2.048 Mb/s * Mb/s 4 x 2.048 Mb/s * Mb/s Occupied Bandwidth: 1 x 2.048 Mb/s * MHz (using * level FSK modulation) 2 x 2.048 Mb/s * MHz 4 x 2.048 Mb/s * MHz Spectrum Efficiency: 1 x 2.048 Mb/s * bit/sec/Hz (using * level FSK modulation 2 x 2.048 Mb/s * bit/sec/Hz 4 x 2.048 Mb/s * bit/sec/Hz TX Spurious Emissions: 30 MHz to 21.2 GHz * dBW 21.1 GHz to 55 GHz * dBW TX Spectrum Mask: Refer to Appendix "C" *CONFIDENTIAL TREATMENT REQUESTED. Siemens Specification for 23GHz Radios
Transmitter. No employee may work on the Mt. Xxxxxx transmitter while power is applied to the equipment without another qualified member of the Engineering Department being present. No employee shall be required or requested to climb a transmitter tower. No employee at the main transmitter may, unless another qualified member of the Engineering Department is present:
(a) Do any hazardous work or after-hours testing, maintenance, or
(b) Do any work during operating hours which requires him to be inside the transmitter enclosure while any transmitter power is on. The Employer agrees that automatic safety devices will be installed in all cases where necessary.
Transmitter. Transmitter must be semiconductor or of type RF magnetron (minimum life time of 50,000 hours); • Transmitting frequency must be in the X-band and at least three frequencies within the X-band must be offered by the Supplier; • In case of delivery of a FMCW solution, the transmitter power must be at least 4 W and the stability of the transmitted power must be 0.2 dB in the normal operating conditions and time interval of one month; • Length of the transmitted pulse must be at least in the range of 0.5 to 20 µs; • Repetition rate (pulse repetition frequency, PRF) for pulse mode must be user- adjustable within 1-2 kHz. It must be possible to switch the frequency by using software settings within the measurement scenarios without hardware intervention.
Transmitter. Centre Wavelength λc λc-6.5 λc λc+6.5 nm Spectral Width (-20dB) ∆λ 1 nm Side Mode Suppression Ratio SMSR 30 dB Average Output Power Pout -5 0 dBm 1 Extinction Ratio ER 9 dB Optical Rise/Fall Time (20%~80%) tr/tf 180 ps Data Input Swing Differential VIN 400 1800 mV 2 Input Differential Impedance ZIN 90 100 110 Ω TX Disable Disable 2.0 Vcc V Enable 0 0.8 V TX Fault Fault 2.0 Vcc V Receiver Sensitivity -23 dBm 3 Receiver Overload -3 dBm 3 LOS De-Assert LOSD -24 dBm LOS Assert LOSA -35 dBm LOS Hysteresis 1 4 dB Data Output Swing Differential Vout 370 1800 mV 4 LOS High 2.0 Vcc V
Transmitter. Prior to Closing, Seller shall purchase a new transmitter for KCYE as described in Schedule 7.10, and shall convey such transmitter to Buyer at Closing. The parties agree that Seller shall be responsible for delivering the transmitter to the KCYE transmitter site but that Buyer shall be responsible for installation of the transmitter following Closing.
Transmitter. 4.1.1.1 Output Spectrum [***]
4.1.1.2 Number of Beams [***]
4.1.1.3 Carrier Bandwidth [***]
4.1.1.4 Carrier Spacing [***]
Transmitter. 4.1.1.1 Output Spectrum [***]
4.1.1.2 Number of Beams [***]
4.1.1.3 Carrier Bandwidth [***]
4.1.1.4 Carrier Spacing [***]
4.1.1.5 Number of Carriers Supported Per Beam [***]
4.1.1.6 Modulation [***] Exhibit B Use or disclosure of the data contained on this sheet is subject to the restriction on the title page. TerreStar Satellite Base Station Subsystem Functional Requirements [***]
4.1.1.7 Transmit Symbol Rates [***]
4.1.1.8 Transmit Pulse Filter [***]
4.1.1.9 Transmit Error Vector Magnitude [***]
4.1.1.10 Transmit Power Control [***]
4.1.1.11 Frequency Accuracy [***]
4.1.1.12 Forward Error Correction Coding [***] Exhibit B Use or disclosure of the data contained on this sheet is subject to the restriction on the title page. TerreStar Satellite Base Station Subsystem Functional Requirements
4.1.1.13 TDMA Burst and Frame Length [***]
4.1.1.14 RF Output Spectrum Emissions
Transmitter. OFDM-CSK with a discrete chaotic sequence for modulation is considered in the system, with respect to the non-coherent advantages of DCSK and the spectral efficiency of multi-carrier modulation. For mathematical simplification, a mathematical model is described for a single user only. As shown in Figure 4.3, for each user, a chaotic code is generated and used as a reference and spreading code. The input information sequence is first converted into U parallel data sequences with each bit being of equal probability of +1 and -1. Let S be the U × U scrambling matrix, which is obtained by the logistic map-based chaotic sequence xc, generated from the chaotic signal generator. Also let s = [s1, s2, · · · , sU ]T and e = [e1, e2, · · · , eU ]T represent the data vectors before and after scrambling (the first layer of security), respectively. It holds that e = s × S. (4.1) The uth sub-stream is spread with the chaotic spreading code au = [au,1, au,2, · · · , au,β] (generated by the same chaotic signal generator) through the chaotic reference signal ∑ xu(t) = au,kh(t − kTc), (4.2) where h(t) is the square-root-raised-cosine filter, βis the length of chaotic spreading code and Tc is the chip duration. This filter is band-limited and is normalised to have unit energy. Let H(f ) = F (h(t)), where F denotes the Fourier transform. It is assumed that H(f ) is limited to [−Bc/2, Bc/2] , which satisfies the Xxxxxxx criterion with a roll-off factor α (0 < α < 1). Here, Bc = (1 + α)/Tc. Note that the first two subcarriers are used to modulate the reference signals xu(t) and xc(t). The remaining subcarriers are used to carry data. Therefore, the transmitted signal of the single-user OFDM-CSK after the second layer of security is given by e(t) = xc(t) cos (2πf1t + φ1) + xu(t) cos (2πf2t + φ2) ∑ + eixu(t)cos(2πfi+2t + φi+2), (4.3) where φi represents the phase angle introduced in the carrier modulation process of the ith subcarrier (with frequency fi). In this chapter the transmitted energy in every subcarrier is normalised.
