Promax AE-166 User Manual page 109

Press LPF[F2] to set the low pass filter frequency, alternatively the
frequency can be set to bypass:
FM Signal Frequency (Hz)
=78,125
=39,063
=19,531
=7,813
=3,906
=1,953
=781
=391
=195
=78
=39
=20
=8
Press Time Axis[F3] to set horizontal axis parameters:

Ref. Value[F1]: Sets the starting time on the time axis.

Ref. Pos[F2]: Shifts the waveform X number of grid subdivisions.

Scale/Div[F3]: Sets the grid division scale when Auto Scale is Off.

Auto Scale[F4]: Toggles auto-scaling on/off.
Press Deviation Axis[F4] to set deviation (vertical) parameters:

Ref.Value[F1]: Offsets the reference position (in frequency).

Ref.Pos[F2]: Sets the reference position of the waveform on a vertical
grid subdivision (1:10).

Scale/Div[F3]: Sets the vertical grid division scale.

Auto Scale[F4]: Toggles auto-scaling execution.
February 2017
Selectable bandwidth of LPF (Hz)
156,250 78,125
78,125 39,063
39,063 19,531
15,625 7,813
7,813 3,906
3,906 1,953
1,563 781
781 391
391 195
156 78
78 39
39 20
16 8
52,083 39,063
26,042 19,531
13,021 9,766
5,208 3,906
2,604 1,953
1,302 977
521 391
260 195
130 98
52 39
26 20
13 10
5 4
31,250
15,625
7,813
3,125
1,563
781
313
156
78
31
16
8
3
100