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PTT/FSK control and Attenuator Setting
The PTT/FSK setting may be changed and the audio output attenuator may be
enabled by changing the configuration of an internal switch and a jumper.
1. Disconnect all the cables from the SCU-17.
2. Referring to Figure 1, remove the 4 screws attaching the top case, then re-
move the top case.
3. Refer to Figure 2 for the location of switch (S1001) and jumper (J1006).
4. Set the switch (S1001) and jumper (J1006).
S1001: PTT/FSK control setting
J1006: Attenuator setting to the audio output of the Audio IN/OUT jack.
5. Replace the top case, using the 4 screws removed in step (2) above.
6. Reconnect the cables to the SCU-17.
S1001
PTT : RTS
FSK : DTR
PTT : DTR
FSK : RTS
SCU-17 USB I
nterfaCe
Figure 1
Figure 2
U
nIt
J1006
ATT : OFF
(100 mVrms)
ATT : ON
(1.4 mVrms)
15
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