MTP (Multi-mode Integrated Transponder: 4 mode)
| Registration date | 2/23/2011 |
|---|---|
| JAXA development group | Research Unit I, Research and Development Directorate |
| View diagram | See Attachment 1 |
| Environmental resistance | See Attachment 2 |
| Patent number (publication number) |
N/A |
| Reference | N/A |
| Satellite and launch date | To be supplied after launch |
| Note | N/A |
Manufacturer
NEC Space Technologies, Ltd.
1-10, Nissin-cho, Fuchu, Tokyo, Japan
https://www.necspace.co.jp/en/index.html
Features
- This MTP operates in the four modes as described below, and flexibly satisfies user requirements.
■ USB for launch phase and emergency operations
■ QPSK for high data rate transmissions
■ SSA for intersatellite communications
■ CDMA for interference resistant communications - Range measurements
Tone ranging (USB) and PN ranging (USB, CDMA, SSA) are provided. - Automatic mode transition function
The automatic mode transition function is provided for satellite emergency cases.
Applications
Communications between space and ground stations
- Receiving telecommands
- Transmitting telemetry data
- Ranging
Intersatellite communications
- Receiving telecommands
- Transmitting telemetry data
- Ranging
Specifications
| Property | Specification | |
|---|---|---|
| Physical characteristics | Dimensions | 120 mm x 201 mm x 291 mm |
| Weight | 3.6 kg for LEO, and 4.0 kg for GEO | |
| Power consumption | max. 45 W (Tx+Rx) ≦14.8 W (Rx only) |
| Property | Specification | |
|---|---|---|
| Receiver characteristics | Command modulation | PCM-PSK/PM, QPSK/BPSK, UQPSK |
| Receiver carrier frequency | Select one frequency in the range of 2025 to 2110 MHz | |
| Command bit rate | USB : 500 bps to 4 kbps (select one rate) QPSK : 512 kbps (fixed) SSA : 125 bps to 300 kbps (select two rates) CDMA : 500 bps to 32 kbps (select two rates) |
|
| Dynamic range | USB : -120 to -40 dBm QPSK : -90 to -40 dBm SSA : -134 to -40 dBm CDMA : -110 to -40 dBm |
|
| Carrier acquisition level | -110 to -40 dBm for USB | |
| Command threshold | USB : -100 to -40 dBm QSPK : -90 to -40 dBm SSA : -134 to -40 dBm CDMA : -110 to -40 dBm |
|
| Noise figure | ≦2.3 dB | |
| Carrier acquisition range | USB : Uplink frequency ±150 kHz QPSK, SSA, CDMA : Best Lock Frequency ±1400 Hz |
|
| Tracking range | ±150 kHz |
