13
TK-880
OPERATING FEATURES
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GPS Report
A NMEA-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 re-
quest. 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 transmis-
sions.
• GPS Time Mark (Per Mobile)
The amount of time from the 0 (zero) minute of the stan-
dardized 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 Group/Chan-
nel in conventional format.
• Received GPS Data Output
Any selected sentence can be output through the radio
serial port (COM1).
1) MAP HEADER NMEA1 ($GPGGA), NMEA2 ($GPGLL),
NMEA3 ($GPRMC)
NMEA-0183 standard command. This should be set ac-
cording to your PC application.
2) MAP HEADER KW1 ($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.
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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 Group/Channel. If a radio unit receives a GTC mes-
sage, it will move to the Data Group/Channel of the current
group. Increase this item to make sure the called radio unit
moves to the Data Group/Channel.
• Random Access (Contention)
When a channel is busy, radio unit will not transmit (de-
pending on its Busy Channel Lockout setting). As soon as a
channel is cleared, some transmissions may crash. Random
access is used to avoid this by employing a random trans-
mission 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 be-
fore giving up the data transmission when the channel 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.
• ACK Delay Time
ACK Delay Time is the amount of time from the end of
r e c e i v i n g a d a t a t o t h e b e g i n n i n g o f s e n d i n g a n
acknowledgement. It should be adjusted as the repeater’s
hang-up delay time. Also, it must be set less than the Maxi-
mum ACK Wait Time of the calling radio unit.
• TX Delay Time (RX Capture)
TX Delay Time is the amount of unmodulated transmis-
sion to let the called unit stop scanning or exit its battery
save mode. It is used only when starting a data communica-
tion sequence.
• Data TX Modulation Delay Time
Data TX Modulation Delay Time is the amount of time
from the beginning of transmission to the beginning of a
data modulation. It is used every time data is transmitted.
7. 5-Tone
When you select 5-tone model, you can set the following
options.
When you select basic level features, only 1 frame 5-tone
format can be programmed.
When you select full level features, up to 3 frame 5-tone
format can be programmed.
Enabling “Setting level” on each menu, you can also use
“Encode/Decode format”. Using “Encode/Decode for-
mat”, you can further program the transceiver to run the
script.
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5-tone Standard
The selected 5-tone standard is used for 5-tone encoding
and decoding.
Range; ZVEI, CCIR, EEA, PZVEI, DZVEI, PCCIR, PDZVEI,
ZVEI-2, EIA, Natel, AP-369, Kenwood
