1. Setting up the Measurement System

The following figures show the instrument connection for a dual-band envelope tracking measurement. Closed

Figure 1 shows the measurement setup when 33522B/33622A AWG is used as envelope signal generator. Closed

Figure 2 shows the measurement setup when N5172B EXG/N5182B MXG is used as envelope signal generator.

Figure 1. Dual-band envelope tracking measurement setup when 33522B/33622A is used as envelope signal generator.

Figure 2. Dual-band envelope tracking measurement setup when N5172B EXG/N5182B MXG Is used as envelope signal generator.

In the system connection diagrams above, the dark blue lines are for RF connection; the light blue lines are for reference, trigger, and envelope signal connection; the black lines are for instrument control connection with LAN or GPIB. In envelope tracking test, timing alignment is required between the ETPA Vcc input and the RF input signal.

Instrument Requirements

The table below shows the supported instruments for envelope tracking measurement. For details about the options required for each instrument model, refer to System Requirements.

Instrument Type	Instrument Model Supported
RF Signal Generator 1¹	N5182B MXG
RF Signal Generator 2¹	N5182A MXG N5182B MXG
Envelope Signal Generator	33522B Arbitrary Waveform Generator 33622A Arbitrary Waveform Generator N5182B MXG N5172B EXG

Instrument Type

Instrument Model Supported

RF Signal Generator 1¹

N5182B MXG

RF Signal Generator 2¹

N5182A MXG

N5182B MXG

Envelope Signal Generator

33522B Arbitrary Waveform Generator

33622A Arbitrary Waveform Generator

N5182B MXG

N5172B EXG

System Connection

To set up the measurement system, follow the steps below:

Connect the PC installed with N7614B Signal Studio to the RF Signal Generator, Envelope Signal Generator, and Signal Analyzer through LAN or GPIB.

Connect the 10MHz reference signal of system which follow the order of 10MHz reference out of RF signal generator 1->REF In Port of RF signal generator 2; 10MHz reference out of RF signal generator 2->EXT REF IN port of signal analyzer; 10MHz out port of signal analyzer ->10MHz in of envelope signal generator.

If when N5172B EXG/N5182B MXG is used as the envelope signal generator, then connect the Event 1 port out of RF signal generator 1 to PAT Trigger port of RF signal generator 2 and envelope generator simultaneously via one power divider; if 33522B/33622A is used as the envelope signal generator, then connect the Event 1 port out of RF signal generator 1 is connect to PAT Trigger port of RF signal generator 2, and simultaneously connected to the EXT Trig port of envelope signal generator.
If N5172B/N5182B is used as Envelope Signal Generator, connect the I OUT and OUT of the Envelope Signal Generator to the VETP and VETN port of the ETPS and connect the VETPS_OUT port of the ETPS to the Vcc of the ETPA; If 33522B or 33622A is used as Envelope Signal Generator, connect the Channel 1 and Channel 2 output of the Envelope Signal Generator to the VETP and VETN port of the ETPS and connect the VETPS_OUT port of the ETPS to the Vcc of the ETPA.

Connect the output of 2 RF signal generators to PA input and PA output to signal analyzer which is same in dual-DPD application.