Abstract: A harmonic time interleave (HTI) system can include a sample clock to provide a reference signal, a summing component to receive the reference signal and a second input, a splitter component to receive an input signal, and delay blocks to each receive an output from the splitter. The HTI system can also include digitizing components to receive the reference signal from the sample clock and an output from each of the mixing components, and a poly-phase filter matrix block to receive an output from each of the digitizing components. The HTI system can also include an interleave reconstruction block to receive an output from the poly-phase filter matrix block and interleave time domain signal samples from each digitizer to create a reconstructed waveform.

Abstract: A system can include an input signal source, a local oscillator (LO), and an intermediate frequency (IF) receiver to receive an input signal from the input signal source and an LO signal from the LO. The IF receiver can include a switch to switch between the first and second inputs to provide an output. The IF receiver can generate a calibration signal from the LO signal.

Abstract: A computer implemented method and telecommunications diagnostic apparatus that correlates packets on a core network with those on the access network. Generated is an identification attribute from Information Elements (IEs) in S1AP packets present in the core network and accessible to the access network. The generated identification attribute is integrated to an access and core session of the access and core network to correlate data packets between the access and core session by comparing if a core session contains the same identification attribute as that of an access session within the life span of the access session.

Abstract: A system can include a first radio frequency (RF) port, a second RF port electrically coupled with the first RF port, a direct current (DC) port, and a bias tee incorporated into a substrate. The bias tee can include multiple capacitors that are each integrated as a catch pad with a layer of the substrate. The bias tee can also include an inductor at least partially integrated with a layer of the substrate.

Abstract: A test and measurement apparatus, system, and method for synchronizing an acquisition or triggering system to a specific burst of interest. The subject apparatus and method triggers on varying energy content of a signal qualified by time in the presence of high-frequency input signal bursts, by using an adjustable pulse width envelope detector, disposed in the signal path of the trigger circuitry, as a digital rectifier or to otherwise process and extract an envelope signal. An RF envelope probe having an analog envelope detector among other suitable components is disclosed. A method is implemented for isolating an interval of interest in a signal under test. An envelope detector circuit produces an envelope signal from the signal. Trigger circuitry receives the envelope signal from the envelope detector, and isolates the interval of interesting in the signal under test using the envelope signal.

Abstract: Systems and methods for deciphering Internet Protocol (IP) security in an IP Multimedia Subsystem (IMS) using a monitoring system are described. In some embodiments, a method may include identifying a Security Association (SA) between a User Equipment (UE) and a Proxy Call Session Control Function (P-CSCF) of an Internet Protocol (IP) Multimedia Subsystem (IMS) over a Gm interface during a registration procedure, correlating the SA with a ciphering key (CK) exchanged between the P-CSCF and a Serving CSCF (S-CSCF) of the IMS over an Mw interface during the registration procedure, and storing an indication of the correlated SA and CK in a deciphering record.

Abstract: An automated spectrum monitoring system may include a measurement device having a signal information display configured to visually present signal information pertaining to a signal, a real-time trigger detector configured to detect a trigger corresponding to the signal, and a mapping application configured to determine a geographic location of a source of the signal and visually present an indication of the geographic location.

Abstract: A network monitoring system probe is coupled to network interfaces and captures data packets. A monitoring system processor identifies messages specific to S1-MME interfaces and identifies GUMMEI parameters in the S1-MME interface messages. The monitoring system creates MME node entries in a network topology list, each of the MME nodes corresponding to a unique GUMMEI value. The monitoring system links individual S1-MME interfaces, SCTP associations, and MME IP addresses to a particular MME in the network topology list. Using authentication messages carried on the S6a and S1-MME interfaces, the monitoring system links individual S6a interfaces and S6a interface IP address to a particular MME in the network topology list and creates one or more HSS node entries in the network topology list. The monitoring system also creates eNodeB, S-GW, and PDN-GW nodes in the network topology list and links them to IP addresses and X2, S11, and S5/S8 interfaces.

Abstract: A cable assembly including a coaxial cable having active components mounted thereon, a housing substantially surrounding the coaxial cable, and a launch connector mounted to the outside of the housing and in connection with the coaxial cable.

Abstract: Disclosed is a processor for predicting perceptual differences between colors recalled from memory and directly viewed colors in a tested video. The processor includes a memory effects processor structured to generate compensation factors for distortions of color due to memory effects and apply the compensation factors to data from the reference video or data from the tested video. The compensation factors may include factors for changes in saturation over time, changes in hue angle, changes in uncertainty, and a categorization factor that reflects a trend in shifts and towards cardinal color centroids over time in memory.

Abstract: A test and measurement instrument including a splitter configured to split an input signal having a particular bandwidth into a plurality of split signals, each split signal including substantially the entire bandwidth of the input signal; a plurality of harmonic mixers, each harmonic mixer configured to mix an associated split signal of the plurality of split signals with an associated harmonic signal to generate an associated mixed signal; and a plurality of digitizers, each digitizer configured to digitize a mixed signal of an associated harmonic mixer of the plurality of harmonic mixers. A first-order harmonic of at least one harmonic signal associated with the harmonic mixers is different from an effective sample rate of at least one of the digitizers.

Abstract: Aspects of the invention include an equivalent-time sampling oscilloscope that receives a carrier signal, the carrier signal after it has been modulated with a repeating data pattern, and a pattern trigger signal that is synchronous with the data pattern. The carrier signal and the modulation are asynchronous, that is, they are not phase-locked in any way. The oscilloscope simultaneously samples the modulated carrier signal and quadrature phases of the unmodulated carrier signal at a plurality of timebase delays relative to the pattern trigger signal, and a plurality of times at each timebase delay. After collecting this information, the oscilloscope uses the quadrature samples to calculate phases of the unmodulated carrier signal that correspond to the samples of the modulated carrier signal.

Abstract: Systems and methods for session-aware GTPv2 load balancing are described. In some embodiments, a method may include receiving a first and a second transaction between an MME and an S-GW over an S11 interface of an LTE/SAE network using a control portion of a second version of a GTPv2-C protocol and storing an uplink UP TEId and IP address, a downlink CP TEId and IP address, and an uplink CP TEId and IP address obtained from the first transaction, and a downlink UP TEId and IP address obtained from the second transaction. The method may further include identifying messages between an eNodeB and the S-GW over a direct tunnel using a user portion of a GTPv1-U protocol as belonging to a session in response to the messages including at least one of: the first uplink UP TEId and IP address, or the first downlink UP TEId and IP address.

Abstract: A method for monitoring GPRS Tunneling Protocol (GTP) sessions in a mobile communication network having a monitoring module. The method includes the steps of monitoring, by the monitoring module, a plurality of subscriber GTP sessions, and storing recovery parameters related to the subscriber GTP sessions and subscribers associated therewith in records in a database in the monitoring module, wherein the recovery parameters are associated with initial session data for each subscriber GTP session. Upon an outage in monitoring, the method restarts the monitoring module to determine restart parameters associated with existing subscriber GTP sessions and subscribers associated therewith in the records in the database wherein the restart parameters are associated with subsequent session data for each subscriber GTP session.

Abstract: A device and method of re-sampling a plurality of S-parameters for serial data link analysis is disclosed. The method includes storing a plurality of S-parameters sets, each S-parameter set being associated with a subsystem and having associated impulse responses and a time interval. An increased time interval is determined based on the time interval associated with each S-parameter set. The impulse responses are zero filled in each S-parameter set to maintain any wrapped ripples and increase the time interval. A plurality of resampled S-parameter sets are generated with a finer frequency resolution to cover the increased time interval.

Abstract: A method of measuring the phase transient response of a device under test automatically provides a flattened phase transient response without any user intervention. The method comprises the steps of calculating an instantaneous phase waveform based on an instantaneous voltage waveform that represents an output signal of the device under test as it steps from a first frequency to a second frequency, calculating an instantaneous frequency waveform based on the instantaneous phase waveform, automatically estimating the second frequency based on the instantaneous frequency waveform without any user intervention, and flattening the instantaneous phase waveform based on the estimate of the second frequency.

Abstract: An improved arbitrary waveform generator has a waveform memory for storing digitized waveforms, a waveform playout for playing out desired ones of the digitized waveforms as analog waveforms and a sequencer for controlling the waveform playout, the sequencer providing indications of the desired waveform for playout and a desired starting sample position for the desired waveform. The sequencer includes a tracking mechanism for the desired waveform so that the desired waveform is phase coherent when playout is interrupted and restarted later according to programming of the sequencer.

Abstract: A method is disclosed for triggering upon signal events occurring in frequency domain signals. The method includes repeatedly sampling a time-varying signal and generating a plurality of digital frequency domain spectrums based on the samples of the time-varying signal. A frequency domain bitmap for the time-varying signal is repeatedly updated via application of the digital frequency domain spectrums. The method further includes selecting a portion of the frequency domain bitmap, determining a signal occupancy in the selected portion, and triggering a capture of the time-varying signal based on and in response to the occupancy determination for the selected portion of the bitmap.

Abstract: An aspect of the invention includes a computer with a processor and a memory. The processor can generate a control for an Arbitrary Waveform Generator. The control includes various buttons, a drop-down list, and a text box. Upon selection of a button, the control is automatically updated to update the drop-down list and the text box as appropriate. The control is presented on a single screen.

Abstract: An electrostatic discharge (ESD) limiting device for a coaxial transmission line can include an outer housing or shielding, a ground portion positioned within the outer housing, a center pin positioned within the ground portion, and a beam lead device—such as a Schottky diode or other diode—positioned between the ground portion and the center pin and electrically coupled between the ground portion and the center pin. The ESD limiting device may also include one or more spring members mounted on the ground portion to provide elasticity to the device to maintain signal transmission and grounding within the coaxial transmission line.