worst_cluster_time_ms = 1000 * 65536 / devc->clock.samplerate;
acquire_msecs += 2 * worst_cluster_time_ms;
data = g_variant_new_uint64(acquire_msecs);
worst_cluster_time_ms = 1000 * 65536 / devc->clock.samplerate;
acquire_msecs += 2 * worst_cluster_time_ms;
data = g_variant_new_uint64(acquire_msecs);