19 | Keysight | Measurement Applications for the E6640A EXM Wireless Test Set - Solution Brochure

Table 9. Receiver measurements supported by EXM

IEEE802.11a

IEEE802.11b

IEEE802.11g

IEEE 802.11p

IEEE802.11n

IEEE802.11ac

Receiver test items

18.3.10.2

17.4.8.2

19.5.2

18.3.10.2

20.3.21.1

22.3.19.1

Receiver minimum input level sensitivity

18.3.10.3

17.4.8.4

19.5.3

18.3.10.3

20.3.21.2

22.3.19.2

Receiver adjacent channel rejection1

18.3.10.4

18.3.10.4

20.3.21.3

22.3.19.3

Nonadjacent channel rejection1

18.3.10.5

17.4.8.3

19.5.4

18.3.10.5

20.3.22.4

22.3.19.4

Receiver maximum input level

802.11ac 80+80 MHz test solution

The 802.11ac standard specifies two ways to achieve the highest data rate: a single

160-MHz contiguous channel (in many geographies, only two or three such channels

are available), or two non-contiguous 80-MHz channels (i.e. a 160-MHz non-contiguous

channel). In the latter mode of operation, a special spectral mask is defined. Also note

that the two 80-MHz channels used may have a number of different channel spacing

between them.

In addition, EXM can support measurements on 2x2 MIMO, non-contiguous 80+80 MHz

signals. This feature of 802.11ac WAVE 2 increases data rate with spatial multiplexing

and spectrum efficient usage. Figure 11 shows the constellation and EVM numerical

results for two streams on two different frequency segments. EXM can also help you

verify devices for SISO implementations of 80+80 MHz. Contact Keysight for more

information on how to configure these measurements.

Figure 11. Constellation and EVM

numerical results for frequency

segment 1, stream1, frequency

segment 1, stream2, frequency

segment 2, stream1, and frequency

segment 2, stream2

WLAN MIMO test solutions

EXM provides comprehensive MIMO measurement solutions for WLAN MIMO devices

across the lifecycle from research, development, and verification to manufacturing. Test

solutions include:

– Switched MIMO measurements for cost effective manufacturing testing of WLAN

MIMO devices

– True MIMO measurements with multiple TRX channels for design and validation of

WLAN MIMO devices

– Detailed MIMO measurement results per stream and per channel: Modulation

analysis, IQ offset, frequency error, cross talk, and more

– Support Implicit transmitter beamforming calibration test

Figure 12. EXM provides comprehensive MIMO

solutions across lifecycle

Manufacturing

R&D

DVT

True MIMO

Switched MIMO

Implicit Tx beamforming calibration

Receiver test

Keysight N7617B Signal Studio helps you simplify WLAN signal creation for receiver measurement and the EXM TRX provides support

for the transmission of WLAN RF signals from the vector signal generator to the DUT. The number of received packets can be read with

the chipset vendor’s control software.