Tait TMAA04-06 User manual

© Tait International Limited February 2021
www.taitradio.com
402-00032-03
TMAA04-06 Cross-band Linking, GPS and
External Interface Cable
Installation Instructions
Notice The TMAA04-06 cross-band linking, GPS, and external interface cable is
DMR only. It is not currently supported by P25 radios.
The TMAA04-06 cross-band linking, GPS, and
external interface cable is used to extend the
features available with TM9356 dual radio
systems. The cable connects to both radio’s
auxiliary ports so the radio system can be used as a
cross-band repeater, provides an RJ45 socket to
connect to a GPS antenna, and also provides an
external interface connector. The external interface
can be used to power a TM9356 dual radio system
on using ignition sense, and also connect to an
external alert device.
Notice The radio does not meet the IP54 pro-
tection standard once the auxiliary connector
rubber bungs have been removed and this cable has been installed. Care must be taken
when the radio is being operated in an environment where there is water, dust or other
environmental hazards.
Analog Cross-band Repeater Operation
Cross-band repeater mode allows a TM9356 dual radio system be used as a temporary analog
repeater. Any activity received on one radio will be automatically transmitted on the other
radio, and vice versa.
Installation
1. Remove the rubber bung that cover the auxiliary connector on each radio body.
2. Plug an auxiliary connector into the auxiliary port of a radio body.
3. Plug the second auxiliary connector into the auxiliary port of the other radio body.
The cable can be plugged in either way—its orientation has no impact on radio perfor-
mance. However, to reduce the cabling required, orient the cable so the external interface
connector and GPS socket are closest to the device or devices to connect to.
4. Tightly fasten the jackscrew-type locks.
External
Interface
Connector
RJ45 GPS
Socket
Auxiliary
Connectors

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© Tait International Limited February 2021
Radio Programming
Programmable I/O and Audio Settings
At a minimum, settings in Table 1, Table 2, and Table 3 must be programmed for both radios.
Notes:
1. Select Busy Status and Busy Detect to re-transmit any signal.
2. Select Signalling Audio Mute Status and Busy Detect + Subaud to decode valid signal-
ling only. This is recommended if the repeater is to operate on an RF channel that
requires valid subaudible signalling. Otherwise the radio may re-transmit short bursts
of activity when a channel is busy but not captured due to invalid activity.
Receive and Transmit Settings
The cross-band repeater receives signals based on the radio’s squelch (carrier) mute, and re-
transmits signals based on external PTT 1. If programmed to only re-transmit valid signals,
the radio’s signalling mutes are also taken into account, which are affected by the radio’s
monitor function (e.g. hookswitch monitor when the microphone is off the hook). If monitor
settings are programmed, the radio user must not enable monitor (having the microphone off
the hook) while entering, or during, cross-band repeater mode.
The transmit timer, if enabled, limits the maximum duration of cross-band repeater
transmissions. If a transmit lockout period is programmed then further repeater transmissions
will also be inhibited until the lockout timer expires. However, if a valid received signal is
present when the lockout timer expires, then the radio does not automatically resume
transmission. The received signal must first drop and return before re-transmission resumes.
Table 1 Cross-band settings in the Programmable I/O form, Digital tab
Pin Mode Direction Label Action Active Debounce
AUX_GPI1 Conventional Input XBAND_TX Repeater Tx Input Low 10
AUX_GPIO5 Conventional Output BUSY
Busy Status1
Low None
Signalling Audio Mute
Status2
Table 2 Cross-band settings in the Programmable I/O form, Audio tab
Pin Tap In Tap In Type Tap In Unmute Tap Out Tap Out Type Tap Out Unmute
Rx None A-Bypass In On PTT R7 D-Split
Busy Detect1
Busy Detect +
Subaud2
EPTT1 T5 A-Bypass In On PTT None C-Bypass Out On PTT
Table 3 Cross-band settings in the PTT form, External PTT (1) tab
Field Setting
Advanced EPTT1 PTT Transmission Type Voice
Audio Source Audio Tap In

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© Tait International Limited February 2021
Priority scanning also affects the transmit timer during cross-band repeater transmissions. If
a non-priority channel in the group is captured, the radio will re-transmit that activity and the
transmit timer will begin counting down. However, each time the radio samples the priority
channel or channels, there is a brief break in reception which will cause the transmit timer to
restart.
Squelch override is not compatible with cross-band repeater operation. Avoid programming
this feature to a function key, and consider removing the menu option.
Transmit Inhibit
If both radios are receiving activity when cross-band repeater mode is activated, the radio
system can rapidly cycle between transmit and receive. Set Tx Inhibit to Busy to prevent this
from happening by not allowing the radio system to transmit when there is another busy
signal. Alternatively, set different debounce times for each radio, which will separate each
radio’s entry into cross-band repeater mode.
If the cross-band repeater is programmed to only re-transmit valid signals, and one radio is
receiving an invalid signal (such as invalid CTCSS), the mute will stay closed and no re-
transmission will occur. However, if the other radio then receives a valid signal, the radio will
attempt to re-broadcast this over the other signal. Set Tx Inhibit to Busy or Mute to prevent
this re-transmission occurring.
System Timing
For the cross-band repeater to operate correctly with other base stations or repeaters, system
timing must be taken into account. If using subaudible signalling and the transmitter requires
a “tail”, then this can be configured according to Table 4. During the lead-out delay period,
no signalling, such as CTCSS or DCS, is present.
Operational Testing
1. Enable cross-band repeater mode.
2. On the receiving radio, inject an on-channel RF signal at a level of - 70 dBm, modu-
lated to ±3 kHz deviation (wide bandwidth channel) or ±1.5 kHz (narrow bandwidth
channel), at 1 kHz AF.
3. On the transmitting radio, the resulting deviation should be:
■± 3 kHz (with a tolerance of ± 200 Hz) on a 25 kHz wide bandwidth channel.
■± 1.5 kHz (with a tolerance of ± 200 Hz) on a 12.5 kHz narrow bandwidth channel.
Table 4 Transmit tail in the Basic Settings form, Subaudible Signalling tab
Field Setting
CTCSS Settings Lead-Out Delay any duration, up to 1000ms
DCS Settings Lead-Out Delay any duration, up to 1000ms

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Connecting to a GPS Device
The cable provides an RJ-45 socket, which is used to connect a TM9356 dual radio system to
a GPS device such as a Garmin-16HVS antenna/receiver (product code TMAA05-01). GPS
data is sent from the antenna to both radios.
Installation
Plug the GPS receiver/antenna directly into the RJ-45 socket. The socket is the correct type
for the antenna, therefore the adaptor that is supplied with the GPS antenna is not required.
For information on antenna mounting, refer to the instructions provided with your GPS
device.
Radio Programming
Program one or both radios with GPS settings as required. For detailed configuration and
programming information contact your local Tait dealer.
Connecting to the Ignition Signal
The cable’s external interface connector can be used to connect a TM9356 dual body radio
system to the vehicle’s ignition signal. This will turn the radio system off when the ignition
key is off to avoid draining the battery, and will turn the radio system on when the ignition
key is on.
A TMAA04-05 ignition sense kit is available. The kit comprises a mating plug for the
radio’s auxiliary connector and a 13 foot (four metre) length of cable to connect to the
vehicle’s ignition signal.
Installation
Connect pin 4 of the external interface connector (AUX-GPI3) to the 13.8V signal controlled
by the vehicle’s ignition key.
Make sure the ignition switch and the radio links LK1 and LK2 are properly configured
to reduce the radio's power consumption. Refer to the TM9300 Service Manual for more
information.

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© Tait International Limited February 2021
Radio Programming
Program both radios as shown in Table 5.
Connecting to an External Alert Device
The cable’s external interface connector can be used to connect a TM9356 dual body radio
system to an external alert device in the vehicle. This enables both radios to drive the same
external alert device.
Installation
The external alert lines used to connect to an external device are open collector outputs.
Connect pin 9 (radio closest to connector) and pin 10 (radio furthest from connector) of the
external interface connector to an input on the interface to the external alert device. Connect
the pins together to drive the same external alert device. Connect the pins separately to drive
separate external alert devices.
Notice The high current sink capability of the radio’s auxiliary lines cannot be
accessed with this cable. That means you cannot connect directly to an external alert
device—an interface to the external alert (such as a controller box) must be used.
Notice The internal pullups normally available from the auxiliary lines are not avail-
able via this cable. If the external alert requires a logic-type signal on the output lines, the
lines must be pulled up to a suitable voltage level by an external resistor.
Radio Programming
Program both radios as shown in Table 6.
Connecting to other External Devices or Signals
The cable does not currently support any other programmable I/O actions, or connection to
other external devices or signals.
Table 5 Ignition sense settings in the Programmable I/O form, Digital tab
Pin Mode Direction Label Action Active Debounce
AUX_GPI3 All Input IGN_SENS Power Sense (Ignition) High 10
Table 6 External alert settings in the Programmable I/O form, Digital tab
Pin Mode Direction Label Action Active Debounce
AUX_GPIO6 Conventional Output EXT_ALRT External Alert 1 Low None

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Interface Specification
The following tables summarise the signals used for all connectors on the cable, and shows
the interfaces between the cable and the radios.
More Information
Please contact your nearest Tait provider for more information about this product.
Auxiliary connectors—pins and signals
Pin Signal name Description
2 AUX_GPIO5 busy (output)
3RXD receivedata
4 AUX_GPI3 ignition sense
7 AUD_TAP_IN audio tap input
8 +13V8 power supply to GPS device
9 AUX_GPIO6 external alert
12 AUX_GPI1 PTT (input)
13 AUD_TAP_OUT audio tap output
15 AGND ground
GPS socket—pins and signals
Pin Signal name Description
1 +13V8 power supply from radio
2 GND ground
3 GND ground
5 GPS_TXD transmit data
External interface connector—pins and signals
Pin Signal name Description
4 AUX_GPI3 ignition sense
9 AUX_GPIO6 external alert (radio closest to connector)
10 AUX_GPIO6 external alert (radio furthest from
connector)
15 GND ground
rear view
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