The CNG-EbNo is a fully automated instrument that sets and maintains a highly accurate ratio between a user-supplied carrier and internally generated AWGN noise, over a wide range of signal power levels and frequencies.
The CNG-EbNo gives system, design, and test engineers in the cellular/PCS, satellite and military communication industries a cost-effective means of obtaining higher yield through automated testing, plus increased confidence from repeatable, accurate test results.
| Key Features |
| C/N carrier to noise ratio |
| C/I carrier to interferer ration |
| C/No carrier to noise density ratio |
| Eb/No bit energy to noise density ratio |
| Custom configurations |
| 6.25" color TFT touch screen |
| Accuracy of 0.2 dB RSS |
| Bit Rates from 1 bps to 1 Gbs |
| Variable Output Power from -55 dBm to +5 dBm |
| Benefits |
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| Multiple Operating Modes | The CNG-EbNo provides five operating modes:
carrier-to-noise (C/N), carrier-to-noise density (C/N₀ ), bit energy-to-noise density (Eb/N₀ ), carrier-to-interferer (C/I), and power meter.
The instrument can also be used as a precision noise generator.
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| Custom Configurations | The CNG-EbNo is available in a variety of configurations to meet your specific testing needs.
Applications include:
military communications
WCDMA
SATCOM
NASA TDRSS
CableTV
HDTV
IS-95
CDMA
TSMA
UMTS
GPRS L-band modems
Milstar
Inmarsat
Intelsat
General Purpose.
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| Direct Display of Eb/No, C/N, C/I, or C/No | The 6.25” color TFT touch screen provides simultaneous readout of all significant input and output signal levels relating to the chosen operating mode, including carrier-to-noise ratios. |
| Accuracy of 0.2 dB RSS | A special, large-dynamic-range power meter measures both the signal and the noise, which allows the CNG-EbNo to set the desired ration to within ±0.2 dB. Special configurations can provide improved accuracy. |
| Bit Rate Entry of 1 bps to 999 Mbps and above | In bit energy-to-noise density testing (Eb/No ), the instrument automatically calculates noise density based on the user specified bit rate. |
| Variable Output Power | Output power is user-specified and can be set within the range of -55 dBm to +5 dBm. |
| True RMS Power Meter | The digital power meter is custom designed to cover the frequency range of the particular instrument. It can measure signals and noise accurately with Gaussian Noise crest factors up to 18 db. |
| Direct Testing at both RF and Microwave Frequencies | In configurations that cover two separate frequency ranges, measurements can be made directly without the need for special conversion circuitry. |
| Specifications |
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CNG-EbNo
Precision SNR Noise Generator
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| Feature | Parameter |
| Carrier Path | Input Power Range: -55 dBm to +5 dBm
Maximum Input Power: +21 dBm (with no damage)
Output Power Range: -55 dBm to +5 dBm
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| Noise Path | Output Power Range: -55 dBm to +5 dBm
Ratio Accuracy: ±0.2 dB RSS, ±0.3 dB WCU
Power Meter Range: -55 dBm to +5 dBm
Power Meter Accuracy: ±0.5 dB
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| Primary Power | Operating Temperature: 0° to 50° C
Dimensions: 17” W x 5.25” H x 17.5” D
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| Specifications |
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CNG-EbNo
Precision SNR Noise Generator
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| Model Overview |
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| Model | Frequency Range |
| CNG-EbNo-70 | 50 to 90 MHz |
| CNG-EbNo-IF1 | 50 to 90 MHz
100 to 180 MHz
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| CNG-EbNo-105 | 65 to 75 MHz
50 to 90 MHz
100 to 180 MHz
10 to 200 MHz
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| CNG-EbNo-225 | 50 to 400 MHz |
| CNG-EbNo-750 | 650 to 850 MHz |
| CNG-EbNo-1550 | 950 to 1200 MHz
1150 to 1450 MHz
1400 to 1700 MHz
1650 to 1950 MHz
1900 to 2150 MHz
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| CNG-EbNo-1550A | 950 to 2150 MHz |
| CNG-EbNo-1700 | 1400-2000 MHz
1610-1790 MHz
1680-1720 MHz
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| CNG-EbNo-2105 | 1710 to 2500 MHz |
| CNG-EbNo-2450 | 2200 to 2700 MHz |
| CNG-EbNo-4600 | 3400 to 5800 MHz |
| CNG-EbNo-20000 | 18 to 22 GHz |
