SAPFTPA FTP_SERVER_TO_R3 Output in different language

I am working on SAPFTPA background job.

I am using following function module (binary mode)

call function 'FTP_SERVER_TO_R3'
exporting
handle = w_hdl
fname = wrk_file
importing
blob_length = blob_length
tables
blob = gt_downlaod.

After executing the function module gt_download contains data in some different character format.

the format is attached.