The broadband immunity test system NSG 4031 has been designed for testing in accordance with IEC / EN 61000-4-31. It contains a white noise generator with four different band filters to allow band limited testing as may be required in future product standards. The internal power meter are capable to show the forward power as well as the VSWR of the connected setup. The three front panel inputs allow an easy test level setting procedure. The internal power amplifier with more than 80 Watts output power allows test levels 1 to 3 as given in table 1 of IEC / EN 61000-4-31 also including an optional 2 dB attenuator which can be used in case of severe EUT mismatch. Due to the powerful and easy to use firmware, the NSG 4031 is independent from an external PC and control software.
Technical specifications of the white noise generator
| Frequency bands: | 150 kHz to 80 MHz, 150 kHz to 30 MHz, 1 MHz to 30 MHz, 1 MHz to 80 MHz |
| RF Level | |
| Level range: | min -60 dBm/Hz to -40 dBm/Hz |
| Broadband signal flatness: | < ±3 dB (150 kHz to 80 MHz) |
| Out of band attenuation: | > 20 dB (100 MHz) |
| Pulse modulation | |
| Rise / fall time (10% / 90%): | < 1 µs |
| Modulation frequency range: | 1 Hz to 10 Hz |
| Frequency resolution: | 1 Hz |
| Duty cycle: | 10% to 90% |
Technical specifications of the power meter
| Frequency range: | 9 kHz to 1 GHz |
| Linear measurement range | |
| channel 1: | -35 dBm to +27 dBm |
| channel 2,3: | -45 dBm to +20 dBm |
| Max. input / no damage | |
| channel 1-3: | +28 dBm |
| Noise level: | >5 dB below the measurement range |
| Input return loss: | >20 dB (below 500 MHz), >17 dB (500 MHz to 1 GHz) |
| Connector: | BNC socket, 50 Ω |
| Accuracy 10 to 30°C: | <0.5 dB, typ. <0.3 dB |
Technical specifications of the power amplifier
| Frequency range: | 150 kHz to 80 MHz |
| Input impedance: | 50 Ω |
| Output impedance: | 50 Ω |
| Input return loss: | min. 10 dB |
| Output return loss: | nominal min. 9.5 dB, 0 dB without damage |
| Gain: | min. 50 dB |
| Gain flatness: | max. + / - 3 dB |
| Saturated output power: | min. 49 dBm |
| Linear output power: | min. 48 dBm |
| Max. input power without damage: | max. +10 dBm |
| Harmonic distortion at linear output power: | typ. < -20 dBc |
Analog ports
| Front panel | |
| Generator output: | N socket 50 Ω, |
| Power amplifier input: | N socket 50 Ω, max. +10 dBm |
| Power amplifier output: | N socket 50 Ω |
| Power meter channel 1 to 3: | as defined in chapter “Power meter“ |
| Back panel | |
| Monitoring input analog: | BNC socket, 0 to 24 V Ri=15 kΩ, 6 mV resolution |
| External modulation input: | BNC socket, impedance >10 kΩ |
Digital ports
| Front panel | |
| USB: | USB host connector for USB stick, keyboard, mouse |
| Back panel | |
| User port: | D-Sub 15 pole with 4 TTL inputs, 4 TTL outputs, +12 V / 800 mA, -12 V / 200 mA and +5 V / 800 mA power supply |
| Monitoring digital input: | BNC socket, 0 to 24 V via optical coupler Ri=1.5 kΩ, switching threshold approx. 2 to 3 V |
| Monitoring optical input: | LWL (Light wave connector), HP versatile link HFBR0501 series 40 kBd, (avoid scattered light on the back panel) |
| Trigger input: | BNC socket, TTL for external triggering, max. frequency 100 Hz, trigger delay <10 ms |
| RS232: | D-Sub 9 pole, up to 115200 Bd |
| RS232 optical: | Connector 2 x HFBRx523 socket for 1 mm fiber optic cable with |
| 2x USB: | USB host connector for USB stick, keyboard, mouse |
| USB device connector: | For remote control |
| Network: | RJ45, Ethernet 10 / 100 BASE-T |
General specifications
| Mains input: | 100 to 240 VAC, 50 / 60 Hz, autoranging |
| Power consumption: | approx. 415 W |
| Operating temperature range: | 0°C to 40°C |
| Storage temperature range: | -20°C to 60°C |
| Relative humidity: | 95% / 30°C (no moisture condensation) |
| EMC: | DIN / EN 61326-1:2006 |
| Shock: | DIN / EN 60068-2-27 |
| Vibration: | DIN / EN 60068-2-6 |
| Protection class: | DIN / EN 61010-1 / IEC 61010-1 |
| Size (W x H x D) : | 45 cm (19“) x 15 cm (3HU) x 42.3 cm (with handle bar and foot) |
| Weight: | approx. 15 kg |
| Size of cardboard box: | 80 cm x 61 cm x 34 cm |
| Weight of cardboard box: | approx. 8 kg (empty) |
