Input Extensions (E7515A/E7515B)

The Keysight E7515A/7515B Wireless Test Set uses the same input extensions that are available for X-Series signal analyzers. However, the E7515A/7515B Wireless Test Set supports protocol trigger extensions that are not supported by other X-Series signal analyzers.

Refer to the Keysight X-Series Signal Analyzer section for more information.

Protocol Trigger

The Protocol Trigger values are as follows:

Prot Frame Aligned - selects a protocol frame aligned Base Station Emulation as the trigger. A new sweep/measurement will start when the protocol frame aligned data trigger condition is met. Prot Frame Aligned Trigger is aligned with the Base Station Emulation Pre-5G/NR5G/LTE-A/NBIot/Wcdma/TD-CDMA Code Division Multiple Access: One of several digital wireless transmission methods in which signals are encoded using a specific pseudo-random sequence, or code, to define a communication channel. A receiver, knowing the code, can use it to decode the received signal in the presence of other signals in the channel. This is one of several "spread spectrum" techniques, which allows multiple users to share the same radio frequency spectrum by assigning each active user an unique code. CDMA offers improved spectral efficiency over analog transmission in that it allows for greater frequency reuse. Other characteristics of CDMA systems reduce dropped calls, increase battery life and offer more secure transmission. See also IS-95./GPRS General Packet Radio Service: A packet-linked technology that enables high-speed (115 kilobit per second) wireless Internet and other data communications over a GSM network. It is considered an efficient use of limited bandwidth and is particularly suited for sending and receiving small bursts of data./GSM Global System for Mobile Communications: Originally developed as a pan-European standard for digital mobile telephony, GSM has become the world’s most widely used mobile system. It is used on the 900 MHz and 1800 MHz frequencies in Europe, Asia and Australia, and the 1900 MHz frequency in North America and Latin America. Protocol uplink frame timing boundary. It depends on the technology format of the base station call processing.
Prot Chan Detection - selects protocol channel detection Base Station Emulation as the trigger. A new sweep/measurement will start when the protocol channel detection trigger condition is met. Protocol Channel Detection Trigger is defined as the Base Station Emulation protocol L1 LTE-A/NBIot channel detection event of PUSCH, PUCCH, PRACH Physical Random Access Channel or SRS. With this trigger, the IQ data, and therefore the measurement, is aligned at the beginning of the LTE sub-frame where the particular event was detected. Channel transmission is aligned to the sub-frame boundary; therefore, the measurement is aligned with its transmission with the exception of SRS which might not start at the beginning of the sub-frame containing the SRS as it might have an offset from the start of the sub-frame base on the SRS configuration, In this case, the trigger and measurement are aligned to the beginning of the sub-frame containing SRS as defined by this trigger type (which is not the beginning of the SRS itself due to the offset).
Prot Event - selects a Protocol Event Base Station Emulation as the trigger. A new sweep/measurement will start when the protocol event trigger condition is met. Prot Event Trigger is defined as the Base Station Emulation protocol LTE L1 internal event such as the starting of a predefined uplink pattern for a relative power control ramp. With this trigger, the IQ data, and therefore the measurement, is aligned with the start of the desired uplink pattern.