Applicable Standards:
IEC 61000-4-6, MIL-STD-461 CS114, ISO 11452-4, SAE-J1113-2, DC 10614
Datasheets:
The CIT-100 is a complete, automated system for conducting RF immunity testing (IEC 61000-4-6, ISO 11452-4, and MIL-STD-461 CS114). It integrates a signal generator and a 75W amplifier (4 kHz to 1.2 GHz) with three internal power meters and a directional coupler to monitor test levels and power. This standalone, cost-effective solution supports various add-ons, including CDNs, EM clamps, and BCI probes.
The CIT-100 is controlled by any PC using Windows software via a USB port. The software automatically configures the integrated signal generator, power amplifier, and RF voltmeter based on your test parameters (frequency, step width, and voltage). Additionally, each of these three functional units can be used as a standalone instrument via dedicated BNC inputs and outputs. The CIT-100’s software control allows for easy standard updates without requiring hardware modifications.
Highlights
Built-in Instruments: Signal Generator, RF-Power Amplifier, RF-Power Meter, and Directional Coupler in one 19” case.
All built-in instruments can be used separately, via existing input/output connectors.
- The Signal Generator and the RF-Power-Meter can also be used for radiated immunity tests per IEC/EN 61000-4-3. An additional external RF-Power-amplifier could be connected to the CIT-100 for this purpose.
Stand-alone operation possible with optional available netbook.
Control-software included.
Automated Setup: Software manages all internal components.
Important parameters are shown on an integrated display.
Automatic EUT-monitoring.
Complete range of CDNs available.
Features
Internal RF-Power Amplifier
- Several amplifier modules are available. Highest output power can be 75 W over the specified frequency range. The amplifier input can be accessed via the back panel of the CIT-100, so that the amplifier can also be used with any external generator. 25 W and 75 W amplifiers are available as standard.
Internal RF-Voltmeter
- Accurate measurements of RF signals from -40 dBm up to +30 dBm are done by the internal 3-channel RF-voltmeter which can be accessed (for separate use) via a BNC connector. One channel is used to measure the test level and two channels to measure the forward and reverse power via the built-in directional coupler.
Internal RF-Signal Generator
- As the internal generator generates its output signal without any internal mixing components, low harmonics and spurious frequencies are assured.
Amplitude Modulation
- Frequencies generated by the generator can also be modulated with a LF signal. Modulation frequencies may vary from 1 Hz up to 100 kHz, modulation levels are available from 0 % to 100 %.
User Defined Signals
- External signals (e.g. EUT-fail or external instruments) can be connected and monitored using the application software.
Standards
IEC/EN 61000-4-6 Immunity to Conducted Disturbances, Induced by Radio-Frequency Fields
MIL-STD-461, CS114 Conducted Susceptibility, Bulk Cable Injection
RTCA/DO-160 Section 20 Environmental Conditions and Test Procedures for Airborne Equipment (Conducted Susceptibility)
SAE-J1113-2 Electromagnetic Compatibility Measurement Procedures for Vehicle Components.
ISO 11452-4 Road vehicles – Component Test Methods for Electrical Disturbances from Narrowband Radiated Electromagnetic Energy – Bulk Current Injection (BCI)
CIT-100 Technical Specifications
| RF Generator | |
|---|---|
|
2 switchable outputs (Only 1 can be used simultaneously) | 2 x SMA |
| Frequency range | 4 kHz to 1.2 GHz |
| Frequency resolution | 1 Hz |
| Output level range | 0 to -63 dBm |
| Output level resolution | 0.1 dB |
| Harmonics | Under 30 DBc |
| Spurious | Under 45 dBc |
| Amplitude mod. (internal) | 0 - 100%, resolution 1% |
| Amplitude mod. (external) | 0-100%, max. Amplitude 1V=100%, BNC jack |
| Pulse modulation (internal) | 5-95%, resolution 1% |
| Pulse modulation (external) | DC...1MHz, 3,3/5V CMOS/TTL, BNC jack |
| LF-Generator (modulation): | |
| Connector | BNC jack |
| Frequency range | 1 Hz to 100 kHz |
| Frequency resolution | 0.1 Hz |
| Signal | Sine wave / square wave / triangular |
| Amplitude | 0...1 V |
| SCPI Interfaces: | |
| USB 2.0 | USB B |
| LAN, 100 Mbit | RJ45 |
| GPIB (optional) | Centronics |
| RF-Voltmeter 1 (test-level): | |
|---|---|
| Connector | BNC jack |
| Frequency range | 4 kHz to 1.2 GHz |
| Measuring range | -40 to +30 dBm |
| RF-Voltmeter 2 & 3 (forward and reverse power): | |
| Connector | 2 x SMA |
| Frequency range | 4 kHz to 1.2 GHz |
| Measuring range | -40 to +33 dBm, + directional coupler ~40dB |
| EUT-Monitor Input: | |
| Input voltage | 0-10 V |
| Resolution | 2.5 mV |
| Input impedance | 100 k |
| EUT-Failed Input: | |
| Input signal | 3.3/5V CMOS/TTL level |
| Detection Mode | Status or edge controlled |
| Temperature measurement | 10 to 100°C (1039-1385 Ohm) resolution under 1°C (PT1000) |
| Digital I/O’s: | |
| Out | 4 bit Digital out, 5V CMOS/TTL |
| In | 4 bit Digital in, 5V CMOS/TTL |
| Interlock: | |
| Closes at | R under 1 kOhm |
| RF-Power Amplifier: | |||
|---|---|---|---|
| Model | CIT-100/25 | CIT-100/75 MIL | CIT-100/75 |
| 25 W | 75 W MIL | 75 W | |
| Frequency range | 100kHz-250MHz | (4) 10kHz-250 (400) MHz | 100kHz-400MHz |
| Output Power: Nominal | 25 W |
75 W, 10W from 4 kHz - 10 kHz, min. 20 W from 250 MHz - 400 MHz | 75 W |
| Output Power: Linear @ 1dB compression | 20 W | 50 W | 75 W |
| Gain | 46 dB nominal | 51 dB nominal | 51 dB nominal |
| Flatness | ± 1.5 dB max | ||
| Input power for rated input | 1 mW/ 0 dBm | ||
| Input/ output impedance | 50 Ohm | ||
| Input VSWR | 1.5:1 max | ||
| Harmonic distortion | Under -20 dBc @ 20W | Under -20 dBc @ 50W | Under -20 dBc @ 50W |
| Noise figure | ~ 5 dB | ~ 7 dB | ~ 7 dB |
| Spurious output | Under -75 dBc @ 01W | ||
