Atec TDEMI6G User Manual

TDEMI 6G

- 4000x faster than conventional EMI receiver

- Measurement according to EN55022

- Analysis of Wi-Fi, Bluetooth

The TDEMI 6G covers the complete frequency range from

9 kHz to 6 GHz and is especially designed for the measure-

ment of multimedia equipment, IT equipment, consumer

electronics and devices for telecom applications. By the

spread use of electronic systems and wireless communica-

tion systems the spectrum up to 6 GHz is more and more

dense occupied by various services. Thus it is getting more

and more important to reduce the overall testing time dur-

ing EMC measurements for product certication as well

as product development. As EMC tests are critical during

the early design phase of a product fast and reliable test-

ing is mandatory to save money and to make later prod-

uct changes obsolet. By the weighted spectrogram mode,

which is real-time displaying the emission over time, an

excellent tool is provided for detection of potential EMI

sources and investigations of EMI reduction methods.

The weighted spectrogram mode is available in all TDEMI

Measurement Systems and allows to measure and record

frequency bands up to 162.5 MHz in a fully gapless man-

ner. For evaluation peak, average and rms detectors are

available. This tool provides a novel method to investigate

instationary and intermitting signals.

measurements. With the optional report generator test

protocols can be generated automatically. The measure-

ment results can be evaluated according to the appropri-

ate standard, e.g. CISPR 16-2-1 and CISPR 16-2-2.

The noise oor above 1.15 GHz is typically below 3 dBµV (1

MHz IF bandwidth, average detector) which is lower than

the noise oor of a state-of-the-art superheterodyne EMI

receiver. By an optional low-noise amplier the noise oor

can be further reduced. The TDEMI uses an auto attenua-

tor in order to set up the optimum attenuation. Further an

overload indication comes with the TDEMI instrument.

The pioneering technology of the TDEMI and the achieved

reduction of test times up to a factor of 4000 makes the re-

ceiver mode of the TDEMI most suitable for extremely fast

measurements with excellent accuracy. The test results can

be used for preinvestigations as well as for full compliance

Fig. 27 – Measurement of Wi-Fi activity around 2.4 GHz. Lower part shows the changes of the emissions over the last 10 s recorded by the TDEMI.

TDEMI 6G Specications

FREQUENCY RANGE

9 kHz - 6 GHz

REFERENCE (OCXO)

Aging < ± 3.5 ppm / 15 years Temperature Drift (0 .. 60° C) ± 1 x 10e-8 SSB Phasen Noise (1 Hz BW) 1 Hz (typ. @ 12.8 MHz) 10 Hz -120 dBc/Hz

RECEIVER MODE (CISPR Standard)

IF Bandwidth 200 Hz Band A

IF Filter: Gaussian Shaped Filter, Specications according to CISPR 16-1-1, Bandwidth Deviation < 10 %

Displayed Average Noise Level (Input Level < 85 dBμV Sinus): < 0 dBμV (typ. -3 dBμV) Measurement at about 700 Frequencies in parallel Frequency Step < 100 Hz

IF Bandwidth 9 kHz

IF Filter: Gaussian Shaped Filter, Specications according to CISPR 16-1-1, Bandwidth Deviation < 10 %

Displayed Average Noise Level (Input Level < 65 dBμV Sinus): < -15 dBμV (typ. -19 dBμV) Measurement at 4096 Frequencies in parallel Frequency Step < 400 Hz

IF Bandwidth 120 kHz

IF Filter: Gaussian Shaped Filter, Specications according to CISPR 16-1-1, Bandwidth Deviation < 10 %

Displayed Average Noise Level (Input Level < 65 dBμV Sinus): < -3 dBμV (typ. -6 dBμV) Measurement at 1024 Frequencies in parallel Frequency Step < 800 Hz

IF Bandwidth 1 MHz

IF Filter: Gaussian Shaped Filter, Specications according to CISPR 16-1-1, Bandwidth Deviation < 10 %

Displayed Average Noise Level (Input Level < 65 dBμV Sinus): < 6 dBμV 1 MHz – 1 GHz < 8 dBμV 1 GHz – 1.15 GHz < 3 dBμV (< 6 dBµV with SW - UG) 1.15 GHz – 6 GHz Measurement at 128 Frequencies in parallel Frequency Step < 800 Hz

WEIGHTED REAL-TIME SPECTROGRAM

Weighted Spectrogram Mode Peak, Average, RMS Time-domain Fully gapless Frequency Step 158 kHz for 120 kHz

1.2 MHz for 1 MHz Frequency Step Interpolation 40 kHz for 120 kHz 300 kHz for 1 MHz Frequency Span > 150 MHz IF Bandwidths CISPR 200 Hz, 9 kHz, 120 kHz, 1 MHz Minimum Time Step 50 ms

TIME-DOMAIN ANALYSIS (RF)

Bandwidth 1 GHz Sampling Rate 2.6 GS/s Acquisition Memory 32000 Samples

ABSOLUTE MAXIMUM RATINGS (ATTENUATION 0 dB)

Maximum DC Input Level, Pulse 6 V RF-CW Signal 120 dBμV

Detector Modes: Peak, Quasi-Peak, Average, RMS, CISPR-AV

Detector Modes: Peak, Average, RMS, CISPR-AV

-95 dBc/Hz

100

Hz -140 dBc/Hz

1 kHz -145 dBc/Hz

INDICATION (ATTENUATION 0 dB)

Maximum DC Input Level, Pulse 5 V RF-CW Signal 65 dBμV

ATTENUATOR

0 - 75 dB, 5 dB Steps, Auto Attenuation max. Input Power for Attenuation > 15 dB: 1 W CW

INTERMODULATION, NONLINEARITIES

CW Signals: Two Tone Harmonics (> 40 dBμV, > 1 MHz) < -40 dB (typ. <-50 dB) Inherent Reception Points < -40 dB (typ. <-50 dB) Total Dynamic Range (120 kHz IF Bandwidth) > 140 dB

INHERENT RECEPTION POINTS (ATTENUATION 0 dB)

Inherent Reception Point 1⁄4 ADC Sampling Rate: << 25 dBμV (using Multi-sampling < -15 dBμV) Further Inherent Reception Points << 5 dBμV (using Multi-sampling < -15 dBμV)

MEASUREMENT TIME

1 ms – 60 s (Average, RMS) 1 ms – innite (Peak, Quasi-Peak)

MEASUREMENT ACCURACY

Sinusoidal Signals (9 kHz - 1 GHz) ± 1 dB Sinusoidal Signals (1 GHz - 6 GHz) ± 2 dB Pulses according to CISPR 16-1-1

RF INPUT

50 Ohm VSWR < 3.0 (typ. 2.0), 1 GHz - 6 GHz VSWR < 1.2 typ., 9 kHz - 1 GHz, with 10 dB Attenuation

REMOTE CONTROL

Ethernet (LAN), Commands according to SCPI Standard

DISPLAY

XGA 8,4” 800 x 600 True Color Touchscreen

Intel Celeron M 1.86 GHz, 1 GB RAM, 160 GB Hard Disk Interface: USB, Ethernet, VGA, serial, IEEE 1394, Audio Windows XP

POWER SUPPLY

230 V, 50 Hz or 110 V, 60 Hz

WEIGHT

ca. 25 kg

MAIN OPTIONS

LN - UG6G Low-noise Preamplier (1 GHz - 6 GHz) PRE - UG Preselection Band A SW - UG Preselection Band B MIL/DO - UG 10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz LISN - UG LISNCable - UG TG - UG Carrying Handle PC - UG Intel Core 2 Duo, 2.16 GHz, 2 GB RAM, 320 GB Hard Disk KB - UG Compact Keyboard incl. Touchpad RG - UG Report Generator CAL - UG Manufacturer Calibration with Certicate CALD - UG DKD Calibration with Certicate CLICK - UG Click Rate Analyzer, fully integrated SLIDE - UG Software for Disturbance Power Measurements

Frequency Extension down to10 Hz, IF Bandwidths

Controller for Measuring Accessories (TTL, 5V) Customized Control Cabel for Accessories, e.g. LISN

< -40 dB (typ.

-53 dB)