Furuno FS-1570 - Tone Frequency

7.2 Frequency
7-10
11. Set TX KEY to OFF to terminate the transmission.
12. Repeat from step 6 to measure the frequency of another operating frequency.
Fig.7.2.3 Frequency adjustment
7.2.2 Tone frequency
The frequency of mark and space tones is measured at TP4 on DSC DSP board and
NBDP DSP board, 05P0751.
Mark = 1785 Hz ± 0.5 Hz
Space = 1615 Hz ± 0.5 Hz
Fig.7.2.4 Location of DSP board
T-CPU board
NBDP DSP board: Option
(for NBDP tone)
DSC DSP board
(for DSC and SSB tone)
REF OSC board
TX/RX board
T-CPU board
Adjuster for 18 MH
z
reference oscillator