Pocsag chain: rtl_tcp -> cdr -> multimon-ng

[sysrun]

Hi,

i am trying to build a chain for POCSAG decoding.

ALready used rtl_fm & multimon - works like a charm.

Now i am trying to use rtl_tcp and csdr for fm decoding.
In my understanding, the deemphasis_nfm_ff is not useable as the BW is too narrow.

Tried this chain:
(Incoming IQ - BW 1024000, Output SR 22050)

'csdr convert_u8_f |'+
'csdr shift_addition_cc 0.126953125 |'+
'csdr fir_decimate_cc 46 0.0010869565217391304 BLACKMAN |'+
'csdr fmdemod_quadri_cf |'+
'csdr limit_ff |'+
'csdr deemphasis_wfm_ff 22050 50e-6 |'+
'csdr fastagc_ff 1024 |'+
'csdr convert_f_s16'

But result is just garbage

Whitch screws i have to turn?