GW Instek GSP-930 User Manual - Manual (Page 126)

GSP-930 User Manual
124
FM modulation
measurements
FM waveform
4. Press Setup[F2]>IF Bandwidth[F1] and set the
Intermediate frequency bandwidth. (10kHz,
30kHz, 100kHz, 300kHz, 1MHz, )
 Set with adequate bandwidth to accommodate
spectrum contained in the carrier.
5. Press LPF[F2] to set the low pass filter
frequency, alternatively the frequency can be
set to bypass:
FM Signal Frequency (Hz)
Selectable bandwidth of LPF (Hz)
≥78,125 156,250 78,125 52,083 39,063 31,250
≥39,063 78,125 39,063 26,042 19,531 15,625
≥19,531 39,063 19,531 13,021 9,766 7,813
≥7,813 15,625 7,813 5,208 3,906 3,125
≥3,906 7,813 3,906 2,604 1,953 1,563
≥1,953 3,906 1,953 1,302 977 781
≥781 1,563 781 521 391 313
≥391 781 391 260 195 156
≥195 391 195 130 98 78
≥78 156 78 52 39 31
≥39 78 39 26 20 16
≥20 39 20 13 10 8
≥8 16 8 5 4 3