Vxi-3570a Vhf/uhf Dsp Receiver

Transcript

TECHNICAL SPECIFICATION VXI-3570A VHF/UHF DSP RECEIVER FEATURES • Wide Tuning Range: 20 - 3000 MHz • 10 Hz tuning resolution • Quadrature digital IF output (I&Q) • Slave LO input/output for DF applications • 10 Hz tuning resolution • Internal frequency reference (option) • C40 communications port output (option) • Sweep and scan functions up to 100 channels per second • 18 Synthesized digital IF filters • 11 Preselection filters • High dynamic range: IP3 >+10 dBm typical NF 12 dB typical DESCRIPTION The VXI-3570A is a high performance multi-mode digital signal processing (DSP) receiver with a frequency range from 20 to 3000 MHz. The message-based receiver is a single C-size module and functions as a servant to another device which acts as its commander. The receiver can detect a wide variety of signals. These include: amplitude modulation (AM), upper sideband (USB), lower sideband (LSB), continuous wave (CW), and frequency modulation (FM). Frequency shift-keyed (FSK) signals can be demodulated as a single sideband suppressed carrier or as true FM signals using an external demodulator or the DC coupled video outputs. The selected detector output is available as an audio signal on a 600 ohm balanced line. It is also available as a DC coupled video signal on a single ended line. The receiver uses an external (or optional internal) reference to generate the 10 MHz synthesizer reference frequency. A headphone jack is provided on the front panel to monitor the audio output. Each local oscillator (LO) signal is jumpered through front panel connectors. This allows two or more receivers to use common LO signals to tune coherently to the same frequency. When used with separate antennas and multichannel phase measuring equipment, the direction of a transmitted signal can be determined. An ISO 9001:2000 Certified Company VXI-3570A VHF/UHF DSP RECEIVER SPECIFICATION FREQUENCY Frequency Range: 20 to 3000 MHz Tuning Resolution: 10 Hz Synthesizer Tuning Speed (from receipt of the last command byte until within 1 kHz of the final frequency): AM, FM, LSB, USB ∆f <100 kHz 0.7 msec, typical ∆f <50 MHz 1.2 msec, typical ∆f <500 MHz 2.4 msec, typical 20 MHz to 100 MHz: 1.8 msec, maximum 100 MHz to 599 MHz, 2.0 msec, maximum 600 MHz to 3000 MHz, 4.0 msec, maximum Switching across 600 MHz, 1200 MHz, 1800 MHz, 2400 MHz & 2642.8 MHz: 4.0 msec, maximum Tuning Accuracy: External Frequency Standard of 10 MHz: Tuned frequency equal to accuracy of external standard in ppm (input power level of 0 ±4 dBm Internal Frequency Reference Option TCXO, 1 ppm of tuned frequency DETECTION MODES AM, FM - All bandwidths USB, LSB, CW - bandwidths <15 kHz SCAN AND SWEEP Memory Channels: 250 programmable channels Scan: Up to 250 channels Sweep: f1 to f2 at selected steps. Up to 125 sweep bands Sweep and Scan Rate: 1 to 100 per second Adjustable Threshold: 1 dB increments RF SECTION RF Input Impedance: 50 ohms, nominal RF Input VSWR: 1.5:1 typical, 3.0:1 maximum at the tuned freq. Sensitivity: AM (6 kHz BW): <2400 MHz, -103 dBm; <2700 MHz, -99 dBm; <3000 MHz, -95 dBm. Input signal modulated 50% by a 1 kHz tone will produce a minimum output (S+N)/N ratio of 10 dB FM: (50 kHz BW): <2400 MHz, -102 dBm; >2400 MHz, -94 dBm. Input signal modulated at a 1 kHz rate with a peak deviation equal to 30% of the selected bandwidth will produce a minimum output (S+N)/N ratio of 17 dB, de-emphasis on. SSB (3 kHz BW): <2400 MHz, -111 dBm; >2400 MHz, -103 dBm. Input signal will produce a minimum output (S+N)/N ratio of 10 dB Noise Figure: F <2400 MHz, 12 dB typical, 16 dB maximum; F >2400 MHz, 20 dB typical, 23 dB minimum RF Input Protection: Activates at signal levels between +10 dBm and +20 dBm. Protects from input signals up to 1 watt continuous, 50 watts (1 msec. pulse, .001 duty cycle) RF Filters: An 11-band preselector set consisting of the following bands: Band Frequency (MHz) 1 20 - 93 2 93 - 156 3 156 - 260 4 260 - 430 5 430 - 720 6 720 - 1200 7 1200 - 1600 8 1600 - 2000 9 2000 - 2400 10 2400 - 2800 11 2800 - 3000 Automatic Gain Control (AGC): LSB, USB: Fast attack selectable decay Attack Time: <10 ms for 50 dB change Decay Time: Selectable 0 to 4 sec nominal for 50 dB change AM, FM: Average attack and decay times 50 ms nominal for 50 dB change Sweep and Scan: Attack time <2 ms (6 kHz or greater BW) Dynamic Range: Output level held to ±1 dB over a 95 dB range Threshold: -110 dBm nominal Dump: Bus-controllable, time <2 ms Manual Gain Control (MGC): Buscontrollable over 127 dB in 1 dB nominal steps Automatic Frequency Control (AFC): Tracking Range: ±5 times IF bandwidth Acquisition range ±50% of IF bandwidth Squelch: Operates on selected carrierto-noise ratios of 0 dB to 99 dB IF SECTION First IF: 1621.4 MHz (RF = 20 1200 MHz), 421.4 (RF = 1201 3000 MHz) Second IF: 21.4 MHz Third IF: 1.4 MHz Fourth IF (DSP): IF filters 18 standard bandwidths (in kHz): 240, 180, 150, 110, 100, 60, 50, 35, 30, 25, 20, 15, 10, 6.0, 5.0, 3.0, 2.0 and 1.0 Shape Factor: Better than 1.5:1, 6 dB - 80 dB Inband Ripple: 1 dB maximum INTERFERENCE IMMUNITY IF Rejection: 90 dB typical Image Rejection: <1200 MHz, 70 dB typical; >1200 MHz, 50 dB typical Blocking: Attenuation of a desired RF signal of -60 dBm and caused by an unmodulated unwanted signal of -10 dBm, spaced 20 MHz away, is less than 3 dB Reciprocal Mixing: With an input at rated sensitivity level in 50 kHz bandwidth, an out-of-band signal 500 kHz removed and 52 dB higher in level will not degrade the (S+N)/N of the desired signal by more than 3 dB Oscillator Reradiation: -60 dBm typical Generated Spurious: -105 dBm equivalent RF input, 15 max. Intermodulation: 2nd Order Intercept: +55 dBm typical 3rd Order Intercept Point: Out of Band: Measured at Audio out or WBIF out Two tones @ -20 dBm, >10 MHz spacing 20 MHz1200 MHz, ≥ +3 dBm min In Band: Measured at WBIF out,< -37 dBc typical Two tones @ -20 dBm, 2 MHz spacing Measured at Audio out,< -40 dBc min Two tones @ -15 dBm, 2 kHz spacing Synthesizer Phase Noise: Frequency Offset Phase Noise (dBc/Hz) 1 kHz -77 10 kHz -81 100 kHz -95 ANALOG-TO-DIGITAL VXI-3570A VHF/UHF DSP RECEIVER SPECIFICATION CONVERTER A/D Bits: 14 A/D Sampling Range: 2 Ms/s A/D Dynamic Range: 80 dB OUTPUTS WBIF: Centered at 21.4 MHz, bandwidth 15 MHz, 21 dB gain nominal NBIF: Centered at 21.4 MHz, bandwidth 0.5 MHz nominal, gain = 73 dB nominal up to -10 dBm nominal output level Digital I&Q: TTL (0 to +5V) serial data @ 12.5 MHz rate. Also available over VXI backplane up to 150 kHz BW Audio Line Output: AM, LSB, USB: 0 ±3 dBm over AGC dynamic range, THD <2% FM: 0 ±3 dBm for deviation equal to 30% of selected bandwidth, THD <3% (de-emphasis on) Audio Frequency Response: 100 Hz to 15 kHz within 3 dB 600 ohms balanced pair, short circuit protected Video: 600 mV peak-to-peak into 75 ohms (deviation equivalent to 30% of selected bandwidth in FM or 50% modulation in AM) Video Frequency Response: DC to 1/2 the IF bandwidth, -3 dB FM De-emphasis: Flat, 75 µs (60 - 240 kHz BW) or 750 µs (6 50 kHz BW) Headphones: 0 to 0.5V peak-to-peak open circuit, 0 to 0.2V peak-to-peak into 8 ohm load impedance to front panel phone jack. Short circuit protected CONTROL The receiver is a VXI message-based servant RELIABILITY MTBF: 11,000 hours. Calculated based on “Naval Sheltered” (NS) as defined in MIL-HDBK-217F MAINTAINABILITY Mean-Time-to-Repair (MTTR) of not more than 30 minutes at the unit replacement level POWER REQUIREMENTS +24 VDC @ 700 mA +12 VDC @ 2000 mA -12 VDC @ 300 mA +5 VDC @ 1500 mA -5.2 VDC @ 200 mA FRONT PANEL CONNECTORS ANT: SMA WBIF: SMA NBIF: SMA LO In: Sub D triaxial male LO Out: Sub D triaxial female DSP Out: 25 pin Sub D (audio & digital IF) PHONE: 1/8” phone plug C40 Out: 25 pin Sub D Reference: SMB FRONT PANEL INDICATOR “FAILED” Red LED ENVIRONMENTAL DATA Operating High Temperature: MIL-STD-810, Method 501.3, Procedure II, Table 501.3-I (ambient air conditions), maximum test temperature 50ºC, one cycle Operating Low Temperature: MIL-STD-810, Method 502.3, Procedure II, Temperature 0ºC Storage High Temperature: MIL-STD-810, Method 501.3, Procedure I, 71°C, one cycle Storage Low Temperature: MIL-STD-810, Method 502.3, Procedure I, Temperature -40°C for 12 hours Humidity: MIL-STD-810, Method 507.3, Procedure I-Natural, Table 507.3-I, five cycles total Shock: MIL-STD-810, Method 516.4, Procedure VI Vibration: MIL-STD-810, Method 514.4, Procedure I, Category 9, Figure 514.4-15 EMI/EMC Equipment designed to intent of the applicable requirements of MIL-STD 461/462 as a guide DESIGN AND CONSTRUCTION MIL-STD-2036, Paragraph 5.1.4 as a guideline Workmanship: MIL-STD-454L, Requirement 9 as a guideline Interchangeability: All identical units, assemblies and replacement parts are physically, electrically and functionally interchangeable DIMENSIONS AND WEIGHT Size: VXI size C, single width Weight: <6 lbs FINISH Front Panel: FED-STD-595 chip 26307, semi-gloss grey enamel Chassis: Corrosion protected following guidelines established in MIL-STD-454L, Requirement 15 Handles and Silkscreen Markings: Matte black C40 OPTION: The C40 interface option allows connection and monitoring of the I&Q data with an external C40 interface unit. The 32-bit serial data is converted into four 8-bit parallel bytes. When the receiver has data for the C40 interface unit, it invokes the strobe line. When the C40 unit is ready to receive the data, it invokes the ready line. This cycle continues until all of the data is transferred. NOTE: Applicable to bandwidths less than 200 kHz VXI-3570A VHF/UHF DSP RECEIVER SPECIFICATION The VXI-3570A 20 - 3000 MHz receiver is a triple-conversion superheterodyne design in which the final IF filtering and demodulation are accomplished with digital signal processing (DSP) for superior accuracy and flexibility. The first IF is at 1621.4 MHz for the tuning range 20 - 1200 MHz, and 421.4 MHz for the tuning range 1201 - 3000 MHz. The second IF is 21.4 MHz and the third is at 1.4 MHz. At the third IF, the signal is converted to digital form at a sample rate of 2 Ms/s. Digital signal processor chips then provide fine tuning, IF filtering to the selected bandwidth, and AM, FM or product detection according to the operating mode. Eighteen bandwidths are offered from 1 kHz to 240 kHz with video output up to 120 kHz. The demodulated signals are converted back to analog form for output to headphones or balanced lines. Ordering Information Model Part Number Description VXI-3570A 2804-1000-24 VHF/UHF DSP Receiver, 20 - 3000 MHz VXI-3570A 2804-1000-25 VHF/UHF DSP Receiver, 20 - 3000 MHz, w/C40 Communications Port VXI-3570A 2804-1000-26 VHF/UHF DSP Receiver, 20 - 3000 MHz, w/Internal Frequency Reference Specifications subject to change without prior notice Printed in U.S.A. Copyright 11/10 9333 Balboa Ave, San Diego, CA 92123 PHONE: 858.505.2024 FAX: 858.505.1593 www.cubic.com An ISO 9001:2000 Certified Company CCI-215c 11/10