Xtl 2500 Installation Manual
Page covering the XTL 1500/2500/5000 Radios
Chapter 1 Introduction This manual covers the installation procedures for ASTRO XTL 1500 mobile and accessories required to complete the radio system. The radio system consists of a control head, radio, antenna, microphone, cabling, and accessories. Main Index of Manuals. SSE 5000™, XTL 1500/1500RB™, XTL 2500/2500RB™ and XTL 5000™ models. ASTRO25™ series radios offer a dual-core CPU, expanded flash memory and full APCO-16/APCO-25 simultaneous support.
These are P25 trunking radios which are mono-band.
- 1Accessory Connector
- 3Pictures of Radios
J2 is the accessory connector
Here's a picture of it from the radio side
Table of Pins
| Rear Accessory Jack Pin Functions | ||
| Pin | Name | Function |
| 1 | GRND | Ground |
| 2 | BUS+ | SB9600 BUS+ Data |
| 3 | BUS1 | SB9600 BUS- Data |
| 4 | TXD | RS232 Transmit Data |
| 5 | RXD | RS232 Recieve Data |
| 6 | USB- | USB - (White) |
| 7 | USB+ | USB + (Green) |
| 8 | RESET | SB9600 Reset |
| 9 | BUSY | SB9600 BUSY |
| 10 | CTS | RS232 Clear to Send |
| 11 | RTS | RS232 Request to Send |
| 12 | USB PWR | USB Power +5v |
| 13 | CHAN ACT | Chanel Activity (COR+PL |
| 14 | GRND | Ground |
| 15 | EMERGENCY | Emergency |
| 16 | PTT | Push to Talk |
| 17 | ONE WIRE | One-Wire Data |
| 18 | VIP OUT 1 | Vehicular Interface Output 1 |
| 19 | VIP OUT 2 | Vehicular Interface Output 2 |
| 20 | SPKR+ | Speaker+ |
| 21 | RX FILT AUDIO | Receive Filtered Audio Out |
| 22 | Monitor | Monitor Overrides PL |
| 23 | AUX MIC | Rear Mic Input |
| 24 | SW B+ | Switched Battery Voltage |
| 25 | IGN | Ignition Sense |
| 26 | SPKR | Speaker - |
Sourcing of connector
Motorola Xtl 2500 User Manual
As of now, there is no other source for the connector than Motorola. The rumor mill puts money on ITT Canon being the manufacturer.
The pins come in a 25 pin strip Motorola Part Number: 3980034F05
The housings are HLN6961
The body looks like 2 D-Sub connectors stacked with standard pitch spacing on the pins.
Aftermarket Pins will not work due to the low profile retaining ring. This thread on the Batlabs Batboard has some more info and this picture showing the differences below:
Notes on assembly
The TE 91285-1 Pin extraction tool is highly recommended. DigiKey Link
The Engineer PA-09 is recommenced as a crimper.
Photos of connector
I disassembled and took some close up pictures with my scope. The connector looks a bit similar to most D-SUB connectors.
Motorola Xtl 2500 Manual
The 900 MHz radio has an option for the pre-amp, you want this enabled.
The other concern for 900 MHz was the preselector B7250, and it's the same device from the MCS2000. Motorola describes it as a 6 MHz wide unit centered on 938 MHz, and then another follow the pre-amp for an image filter. In testing with a tracking generator it was found roll-off didn't happen until about 915 MHz and 960 MHz. This should be (and is) a fine ham band receiver.
The programing info for modifying CPS to program the hamband is on the XTS 2500 page.
Motorola Xtl 2500 Owners Manual
Brick and TIB
Xtl 2500 Maintenance Mode
TIB
Control Head Interface