XTS Vehicular Adapter

General Information

The XTVA is the vehicular adapter for the XTS series of radios.

The XTVA requires the radio to have at least version 5.6 software (The version via service menu).

There are two hardware versions of the XTVA that have different circuitry, the A version, and the B and later versions. In the B version the audio circuitry for volume control was modified. In order to use the XTVA it requires the RF adapter (NTN8327) to be installed. Without it you simply have an expensive vehicular charger.

Unlike the MTVA (MTSX series), the controller is built into the XTVA. Three types of microphones can be used. They are the Standard Palm Mic, Next Generation Hand Mic, and Hand Held Control Head (which looks exactly like the ASTRO Spectra W3 HHCH).

The XTVA comes in two models, the first is an open faced model which allows the keypad of the radio to be accessible if the HHCH is not used, the second covers the display and keypad for protection. Each model is available with either a BNC antenna connector or Mini-UHF.

The radio can be programmed when docked in the XTVA with a separate XTVA programming cable. In addition, there is a data cable which allows the radio to send and receive data via an RF modem for MDC applications.

To re-initialize the microprocessor, disconnect power and remove radio. On the DB-25 connector, short pins 21 and 23 together, and also short 1 and 10 together (Do not connect them all together). With the pins shorted apply power to XTVA for at least 10 seconds. Remove the power source and jumpers. Power the XTVA back up and insert a radio. The XTVA should display the following if successful:

Note: TX LED is on the left, Charge LED is on the right.

The microprocessor will display the following if it needs initialization:

Part Numbers

XTS and Dimetra Kit Models:
NTN8561 Closed face, Mini-UHF for XTS
NTN8560 Open face, Mini-UHF for XTS
NTN1606 Open face, BNC for XTS and Dimetra
NTN1607 Closed face, BNC for XTS

Microphone and Control Heads:
HMN4072 Classic Mobile Mic
HMN4069 Next Generation Mobile Mic (NGMM)
PLN7737 Hand-held Control Head (HHCH)

Power amplifiers (RFPA):
NLE1784 UHF 403-470
NLE1785 UHF 450-512
NLF1258 800

NKN6516 RFPA Cable
NTN8941 XTVA Data Cable
NTN9027 XTVA Programming Cable

External speaker (PAS):
HSN1000 (Phased out)
HSN1006 6-watt speaker, includes cable

Power Cable:

6881088C78 XTVA Instruction manual (The only one you really need)


4-pin connector J2 (see diagram)
[Referred to as Supply Connector]
| 4 | 3 |
|\2/| 1 |
1 A+
2 Ground
3 Ignition
4 LED Dimmer

* Connecting pin 4 to headlight switch dims LEDs

6-pin J1
[Referred to as Speaker Connector]
| 6 | 5 |\4/|
|\3/|\2/| 1 |
1 PAS Input (Audio Out)
2 Ground
3 Ground
4 Unknown
5 PAS A+
6 PAS Sense

* In order for the XTVA to know an external speaker is connected pins
3 and 6 must be shorted. The radio speaker is then muted and audio
transfers to the XTVA PAS.

DB-25 J5:
[Referred to as Interface Connector]
1 Batt RC
9 Sun visor Mic
10 Ground
11 Aux Audio
12 Batt RT
13 LED Disable
14 Batt B+
15 Alarm Out
16 VRS Out
17 Emerg In
18 Ground
19 External PTT
21 Initialize
23 Ground
24 LH Data
25 LH Busy

Activate VRS:
Short 16 with ground

Alarm/Buzzer Relay:
Pin 15 is the driver output

Emergency Foot/handswitch:
Short 17 with ground

Handsfree, External PTT:
Short 19 to ground

External Sun Visor Mic:
Signal on pin 9

Jumper to disable LEDS:
Pin 13 to ground