JRC JMA-9832-SA Instruction Manual page 363

1. This radar uses the six types of standard speed log signals listed below.
Pulse type: 800 pulse/NM, 400 pulses/NM, 200 pulses/NM, or 100 pulses/NM
Synchro type: 360X/NM, 180X/NM, 90X/NM, or 30X/NM
Set Gyro/Log Selection Switch S102 (r) using the S102 setting table.
2. Connect the speed log signal line to, for the pulse type, the [PULSE] side, or for the
synchro type, the [SYNCRO] side, of terminal block TB4801 (Terminal Board Circuit).
3. S102 (r): Gyro/Log Selection Switch
Set the switch assembly in accordance
with the S102 setting table.
ON : 0 
 to be specified
OFF : 1 
Setting the speed log switches
4. Light-emitting diode CD116 (1-axis) and CD117
(2-axis) are provided to check pulse-type log input
signals.
This LED lights if the log signal level is +2V or
more (or under a non-connected status of the log
signal line), or it dose not light if the log signal
level is +2V or less.
5. The S103 (t) operation mode select switch is set
according to the S103 setting table.
S103-1
S103-2 to -8
Fig.126 Setting Table of Speed LOG Select Switches of
ON: BSH
OFF: NORMAL
ALL OFF
Display Unit, Type NCD-4111