Comparison Noise Emitter V
The Comparison Noise Emitter V (CNE V) is a low-cost broadband noise source providing a continuous output from 9kHz to 1GHz. The stable output allows the CNE V to be used as a general-purpose reference source for characterising and verifying both conducted and radiated test environments.
The broadband nature of the output enables the observation of details within the spectrum that would be missed when using a comb generator, whilst the power output level of the unit avoids the overloads possible with impulsive noise sources that may cause damage to the sensitive input circuits of receiving equipment.
The CNE V is supplied with a 50 Ω BNC-type output connector for direct connection to conducted measurement systems. An IEC 320 adapter is also available to provide a connection to LISN equipment, as well as an RJ11/RJ14/ RJ25/RJ45 adapter for connection to telecoms ISNs.
The CNE V can also be connected to an antenna, to generate reference fields for use with radiated emissions test environments such as Open Area Test Sites and anechoic chambers. A selection of antennas that connect directly to the CNE V for this purpose is available. The CNE V is compact and battery powered to allow operation as an electrically small source at lower frequencies, thereby minimising the effect of the CNE V structure when being used as a radiating reference.
Key Features
- Continuous broadband output
- Stable output
- 9 kHz to 1 GHz output
- Compact and portable
- Battery powered
- Low cost
Features/Applications
Features
- Continuous, broadband output; full spectrum measurements and analysis
- Stable output; repeatable measurements
- Conducted and radiated options; evaluation of both conducted and radiated systems
- 9kHz to 1GHz output; applications across a broad frequency spectrum
- Compact and portable; comparisons between sites and environments
- Battery powered; no power or interconnecting cables affecting measurements
- Low Cost; affordable confidence in measurement system results
Applications
- Conducted measurement systems validation and verification
- Radiated measurement systems validation and verification
- Reference source for
- Daily pre-test verification checks as required by Quality Management Systems e.g. ISO 17025, DEF STAN 59-411
- Long-term performance monitoring
- Spectrum analyser / receiver pre-checks
- Investigation of screened room/anechoic room/OATS behaviour
- Comparisons between different measurement environments e.g. OATS or anechoic chambers
- Characterisation of filter performance
- Cable loss measurements
- Inter-laboratory test programs
- Proficiency test programs
Specifications
Frequency Range
- 9 kHz to 1 GHz direct connection into 50 Ω system
- 30 MHz to 1 GHz radiated using TLM01 and TLM02 antennas
Output connector
- 50 Ω BNC-type socket
Temperature stability
- 9 kHz to 1 GHz, <±1 dB, at an ambient temperature of 15 °C to 30 °C
- 9 kHz to 1 GHz, <±2 dB, at an ambient temperature of 5 °C to 40 °C
Time Stability
- Typically <1 dB over a 12 month period
Dimensions
- 120 mm × 120 mm x 41 mm (60 mm including connector)
Weight
- Approx 0.53 kg (including battery)
Power Supply
- 1 x 9 V battery (PP3 or equivalent). Alkaline or rechargeable NiMH
Operating time
- 3 hours typical with alkaline batteries
Indicators
- Power on
- Low battery
Kits
Standard order kits
CNEVKIT01 – Standard CNE V comparison noise emitter kit
Parts included
- CNE V noise source
- TLM01 – 200 MHz to 1 GHz (optimum) 100 mm long top-loaded monopole antenna
CNEVKIT02 – Enhanced CNE V comparison noise emitter kit
Parts included
- CNE V noise source
- TLM01 – 200 MHz to 1 GHz (optimum) 100 mm long top-loaded monopole antenna
- TLM02 – 30 MHz to 300 MHz (optimum) 270 mm long top-loaded monopole antenna
- LSA03 – LISN adapter with IEC 320 style connector
All kits supplied with
- Alkaline batteries
- Hard case
- CAL03 – 9 kHz to 1 GHz CNE V output power measurement using spectrum analyser
- Manual
Accessories
TLM01 – 200 MHz to 1 GHz (optimum) 100 mm top-loaded monopole antenna
TLM02 – 30 MHz to 300 MHz (optimum) 270 mm top-loaded monopole antenna
MCN03 – 1 GHz to 6 GHz (optimum) 120 mm diameter monocone antenna
LSA03 – LISN adapter with IEC 320 style connector
NIA01 – ISN adapter with RJ11/RJ14/RJ25/RJ45 style connection
MON02 – Telescopic rod antenna
Manufacturer’s Calibrations supplied with the kit
CAL03 Conducted output power
- 9 kHz to 1 GHz, measured using a spectrum analyser
Typical Output Measurement Graphs
