M8190A AWG outputs differential IQ signals, generated separately in its two channels, with channel 1 for I path and channel 2 for Q path. Due to the M8190A itself and the cable used for connection, the output signals are not ideal, including
Synchronization in time
Balance in amplitude
Quadrature error
IQ calibration is used to compensate these imperfections.
Click this button to perform IQ calibration. As a result, three parameters will be set to AWG and RF signal generator to compensate the IQ imperfections.
"IQ time skew" will be set to the IQ Skew setting under AWG.
"Gain imbalance" will be set to the IQ Gain Balance setting under AWG.
"Quadrature error" will be set to the Quadrature Angle Adjustment setting under Modulator & Up Convertor.
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1. Configuration |
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Choice: WLAN | LTE FDD
Default: WLAN
Choose the format of the signal for IQ calibration.
Choice: 802.11a/g (OFDM) | 802.11n (20 MHz) | 802.11n (40 MHz) | 802.11ac (20 MHz) | 802.11ac (40 MHz) | 802.11ac (80 MHz) | 802.11ac (80+80 MHz) | 802.11ac (160 MHz)
Default: 802.11a/g (OFDM)
Coupling: This setting is only available when Format is set to WLAN.
Choose the WLAN radio standard for IQ calibration.
Choice: 1/4 | 1/8
Default: 1/4
Coupling: This setting is only available when Format is set to WLAN.
Choose the guard interval of the WLAN signal used for IQ calibration.
Choice: Downlink | Uplink
Default: Downlink
Coupling: This setting is only available when Format is set to LTE FDD.
Choose the direction of the LTE signal used for IQ calibration.
Choice: 1.4 MHz (6RB) | 3 MHz (15 RB) | 5 MHz (25 RB) | 10 MHz (50 RB) | 15 MHz (75 RB) | 20 MHz (100 RB)
Default: 5 MHz (25 RB)
Coupling: This setting is only available when Format is set to LTE FDD.
Choose the bandwidth of the LTE signal used for IQ calibration.