Service manual

Service Manual SD170E Series
Page 14 of 44
CTCSS / DCS Scanning
To help to block out unwanted calls to your radio, the SD170E series can be programmed by your
dealer to scan for tones.
Busy Channel Lockout
This feature, when enabled, disables the transmitter when the user would attempt to transmit
during the receiving channel is busy. It will be dealer-programmable on/off and applicable to all
channels.
Marked Idle
When used in conjunction with Busy Channel, lockouted transmitter is allowed to operate as long
as valid RX tone is received. Dealers program this feature as ON or OFF. This feature will be
dealer-programmable on/off and applicable to all channels.
TX Time-out
This feature, when enabled, limits the amount of time that the user can continuously transmit. This
time can be set in increments by 10 seconds from 10 seconds to 990 seconds. If the user
attempts to transmit longer than the TX Time-out period, five seconds prior to expiration, the radio
will release Time-out alert signal through pin 9 of the DB-15 connector and will cease
transmission.
Power Save
The function of Power Save is used when an external battery is used as the power source. When
Power Save is enabled, the receiver ON and OFF time can be programmed and allows the
operator to set the length of time the receiver gets asleep.
TX Delay
The TX will remain active for 150 ms at the end of TX when using CTCSS tones. This eliminates
squelch tail. Dealer programs this feature as ON or OFF.
Squelch Options
Compared to existing Maxon data radios, programmable sub-audio squelch system (CTCSS &
DCS) and two-tone squelch system are newly added. Each channel will have these squelch
option sets during dealer programming. More detail descriptions for all available squelch systems
of SD170E are the following:
F
F
F
e
e
e
a
a
a
t
t
t
u
u
u
r
r
r
e
e
e
s
s
s