External Input-Based HARQ Scheduling (TTI = 10 ms)
The Tsample_delay value is applicable for both the Dedicated and the Multiplexed modes.
Tsample_delay value can be set in the HSUPA node or via SCPI command. Refer to HARQ ACK/NACK Pattern Delay for External.
In order to sample successfully, Tsample_delay value should indicate the center part of the Ack/Nack feedback. Refer to figure above.
In this example, Tsample_delay = 96000 chip (= 25 ms * 3.84 MHz)
Tsample_delay = The delay of the external trigger for the HARQ Ack/Nack feedback
(i.e. The Tsample_delay value can be set by the W-CDMA Uplink > Channels > HSUPA > HARQ ACK/NACK Pattern Delay for External parameter.)