Check if the Trace Blank (hide trace from the display is on for Trace A, the default waveform. Press the trace key → F1（select Trace A）→ F2（Clear） to recover the trace . Please refer our user manual for details.

Make sure you turned on the rear panel power switch. Please refer our user manual page 20 for details. Note that after proper sequence, it takes around 10 seconds for the display to become active.

The spectrum analyzer is the most widely applied measuring equipment for wireless communication devices, components or systems. It measures and presents the frequency spectrum distribution of the RF signal. Both the frequency and amplitude information can be measured and read through a spectrum analyzer. Nowadays the digital communication technique dominates the wireless communication system, but measuring frequency through a spectrum analyzer is still considered as a significant methodology for RF testing in the industrial field. To satisfy various spectrum analyzing needs, GW Instek provides three models: 3GHz, 2.7GHz, and 1GHz. Equipped with exceptional high performance and affordable price, the products are designed for the applications of wireless product manufacturers, service, design, educational institutes, and so on.

This important method for evaluating parasitic noise generated by integrated circuits is to measure the current on some pins. The objective of this is to place a small resistance in series with selected supply pins and measurement the voltage dropped across this resistance. The connection to the spectrum analyzer is usually realized by a 49 Ohm serial resistance for impedance adaptation and a SMA connector for a clean probing on the board. This measurement can be a particularly good indicator of the noise injected in the PCB in a real product.

Error produced by a nonlinear DAC is represented by its spectra components. Successive power spectrum measurements by a 3GHz Spectrum Analyzer can be used to solved for the unknown amplitude and phase of compensation signals applied to the DAC inputs.

Potential sources of EMI in the work encironment include industrial welding machines, arc and spot welding, degaussing coils, and internal combustion engines. Industrial welding equipment exceeding 500A causes concern with cardiac devices. Low-amperage equipment (range 100-150 A) for hobby arc or spot welding likely does not cause significant interface.

Sometimes EMI (such as energy from electrocautery, cardioversion, or defrillation) can be shunted down the lead, resulting in thermal damage to the lead-tissue interface. This may result in a temporary or permanent rise in the stimulation threshold that is potentially detrimental.

The most common EMI-ICD interaction and concern is that the EMI noise will be interpreted as ventricular fibrillation and initiate a shock. The pacing therapy from an ICD responds to EMI like a stand-alone pacemaker, except noise reversion in an ICD does not result in asynchronous pacing.

Electromagnetic interference (EMI) occurs when the electromagnetic field in the environment interact with an implantable cardiac device, transiently disrupting or altering the device’s normal function. EMI constitutes one of the major concerns for patients with implanted cardiac devices.

For picking low frequency signal, a loop antenna with longer length is necessary and two 4-meters coils are wound such that two ends of each wire are soldered to the internal and ground pins of a BNC individually. Secondly, two loop antennas are attached to the upper and bottom acrylic plate and connect to TG output and RF input of GSP-830 individually. Then the RFID tag can be placed inside of the plates while testing. Thirdly, for the spectrum analyzer side, a 10dB attenuator at tracking generator output is necessary to attain the impedance match. Next step is to set the center frequency at 125kHz, Span 200kHz, reference level -10dB, scale is set to 5dB/div and RBW manually set at 30k for easier observation. Turn on the tracking generator and acquire its level as 0dB. Finally we can test the DUT (Device Under Test) by placing the DUT with center alignment to the up and bottom loop antennas. We may acquire that the desired signal is under modulation.

In terms of the measured output spectrum of the transmitted signal, the power of the carrier can be measure by connecting a cable directly to a GWInstek GSP-830 Spectrum Analyzer. Cable attenuation can be determined using the spectrum analyzer tracking generator.

A scalar network analyzer (SNA), consisting of a tracking generator/ spectrum analyzer (GSP-830 provided by GWInstek) and a radio frequency bridge can be used to sweep the chambers from 1MHz to 1GHz.