TK-880/H (UHF) mobile service manual - The Repeater Builder's ...

OPERATING FEATURES
TK-880/H
• Status/short/unit ID message serial output
(Option)
Whether a received Status/Short message or PTT ID is
output or not from serial port.
• Caller ID display
PTT ID is displayed on LCD.
• Call alert (Continuous)
The radio can provide the alert tone repeatedly until next
operation.
• PTT ID sidetone
This function allows a single beep sound after the PTT ID
(MSK) for FleetSync signalling is encoded.
• Caller ID stack
The radio stores the last 3 received caller IDs to volatile
memory.
■ GPS Report (Optional)
ANMEA-0183 GPS unit must be installed.
• GPS report mode
GPS data can be sent automatically or upon request.
Manually sending GPS data works regardless of this setting.
Auto : GPS data is sent both automatically and by request.
GPS Auto TX Interval and GPS Time Mark must be
adjusted if required.
Poll : GPS data is sent upon request from dispatcher.
• GPS report interval
Interval time between automatic GPS data transmissions.
• GPS time mark (Per mobile)
The amount of time from the 0 (zero) minute of the standardized
GPS UTC time to starting the first transmission of
GPS data. It must be set to a different value for each radio
unit to avoid a transmission crash.
• Send GPS
Pressing this key causes the transceiver to send a single
GPS data.
• GPS report on data group/channel
GPS data transmission is made on the Data System/
Group in trunking format and on the Data Group/Channel in
conventional format.
1) MAP HEADER NMEA1 ($GPGGA), NMEA2 ($GPGLL),
NMEA3 ($GPRMC)
NMEA-0183 standard command. This should be set according
to your PC application.
2) MAP HEADER KW1 ($PKLDS)
This is a Kenwood original sentence which consists of
“$GPGLL + Fleet + ID + Status”. This item should be set
according to your PC application.
3) MAP HEADER KW2 ($PKLID)
This is a Kenwood original sentence which consists of
“Fleet + ID”. This should be set according to your PC
application.
■ Parameters
• GTC count
Number of Go To data Channel messages to be sent before
transmitting a data message if it is being made on Data
System/ Group. If a radio unit receives a GTC message, it
will move to the Data System/Group of the current system.
Increase this item to make sure the called radio unit moves
to the Data System/Group in trunking format and the Data
Group/Channel in conventional format.
• Random access (Contention)
When a channel (or all the repeater channels for Trunking
mode) is busy, radio unit will not transmit (depending on its
Busy Channel Lockout setting in conventional mode). As
soon as a channel is cleared, some transmissions may
crash. Random access is used to avoid this by employing a
random transmission sequence.
• Number of retries
Number of Retries is the maximum number of retry
transmission when no acknowledgement is received in the
Maximum ACK Wait Time. Increase this item to improve
data communication reliability.
• TX busy wait time
TX Busy Wait Time is the maximum amount of time before
giving up the data transmission when the channel (or all
the repeater channels for Trunking mode) is busy. Also, this
timer affects if it expires during Random Access period.
• Maximum ACK wait time
Maximum ACK Wait Time is the maximum amount of
time to wait for an acknowledgement from the called radio
unit. It is used as an interval time of retries. It must be set
greater than the ACK Delay Time of the called radio unit.
• Received GPS data output
Any selected sentence can be output through the radio
serial port (COM1 or COM0).
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