T3-301
Discontinued Product
This product has been discontinued. Information is provided for reference only.
The T3-301 is a Tracker3 board integrated with a Friendcom FC-301 D transceiver. It is nearly identical in setup and pinouts to the T2-301.
The main Tracker3 page includes information common to all Tracker3 variants. This page focuses specifically on the T3-301.
Product Concept
The goal of this product is to provide an integrated Tracker3 and transceiver package for simple and professional installations, including integration with a Garmin FMI device. It can also function as an APRS tracker and digipeater using only a GPS and power source.
System Description
The Tracker3 board replaces the “interphase connection board” inside the FC-301/D radio. It intercepts all data and I/O lines going to the DB9 connector, effectively hijacking the system’s audio and TX/RX control.
NOTE: The T3-301 and FC-301/D have different pinouts and cannot be interchanged.
Internally, the Tracker3 connects to all DB9 pins except power and ground (which are hardwired in the FC-301/D). The usual outputs from the Tracker3 (Port A/B serial, IRQ, 1-wire) are routed to the DB9 connector.
Power Note: The
SETPWRcommand accepts a range of 1–5, corresponding to ~1–5 watts RF output. (The T2-301 used a scale of 1–99.)
DB9 Pinout
| Pin | Function |
|---|---|
| 1 | Port B data in (to tracker) |
| 2 | Port A data out (from tracker) |
| 3 | +5V power out |
| 4 | Ground |
| 5 | Power in (9–15V DC, 1.5A) |
| 6 | IRQ / Counter input |
| 7 | 1-Wire data bus |
| 8 | Port A data in (to tracker) |
| 9 | Port B data out (from tracker) |
System Specifications
Measured at 13.8V system voltage with T3-301, FC-301/D, and ADS-GM1 GPS.
Actual Measured Values (Oct 27, 2013, AI6MS using HP8920B Test Set):
- DC Standby Current: 150 mA
- DC Receive Current: 160 mA
- DC Transmit Current (Max Power): 1.2 A
- RF Power Output (Max): 5.6 W
- RF Frequency Error: +0.011 kHz
- AF High Tone Frequency: 2201.1 Hz
- AF Low Tone Frequency: 1201.2 Hz