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| SPECIFICATIONS (User Manual) |
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| SYSTEM |
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| Channel symbol rates |
1024000, 512000, 256000, 128000 (in symbols per second) |
| Modulation |
BPSK, QPSK, 8-PSK and 16-QAM |
| Optional code types |
BPSK and QPSK (IESS-308): |
| Viterbi rate ½, R-S(126,112) outer coding, ID=4 |
| 8-PSK/TCM (IESS-310), R-S(219,201) outer coding , ID=8 |
| 16-QAM (EN 301 210), R-S(204,188) outer coding , ID=12 |
| Ambiguity encoding |
Binary/ Quaternery/ 8PSK-TCM/ 16QAM-TCM/R-S |
| (Test mode also supports 16QAM-TCM-manual ambiguity decoding) |
| Scrambling |
CCITT V.35 |
| Data interface |
RS-449 |
| IF frequency |
70 MHz (fixed) |
| Modem performance |
As per figure 1 |
| Power supply |
+5 V DC, 1.1A |
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| MODULATOR |
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| Transmit power |
-9 dBm (BPSK, QPSK and 8-PSK) |
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-6.7 dBm (16-QAM) |
| Spectral shaping |
BPSK and QPSK: As per Figure 8 of IESS-308 |
| 8-PSK: As per Figure 10 of IESS-310 |
| 16-QAM: As per Figure A.1 of EN 301 210 For design details refer |
| http://www.signion.com/bbps.pdf |
| http://www.signion.com/pulse.pdf |
| Modulator timing |
Internal |
| Output impedance |
50 ohms |
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| DEMODULATOR |
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| Receive level |
-15 dBm to -5 dBm |
| Acquisition type |
Continuous/ Burst |
| Carrier acquisition range, time |
Continuous mode (BPSK) : ±80 kHz, < 75 ms |
| (at 1024000 baud rate) |
Continuous mode (QPSK) : ±40 kHz, < 150 ms |
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Continuous mode (8-PSK) : ±15 kHz, < 1.4 s |
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Continuous mode (16-QAM) : ±5 kHz
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Burst mode (QPSK) : ±50 kHz, < 78.125 µs |
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Burst mode (coded QPSK) : ±16kHz, < 140.625 µs |
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Burst mode (8-PSK) : ± 8kHz, < 140.625 µs |
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Burst mode (16-QAM) : ± 4kHz, < 203.125 µs |
| Continuous mode tracking (in Hz/sec) |
BPSK: 0.0234% of baud rate |
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QPSK: 0.0117% of baud rate |
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8-PSK: 0.0058% of baud rate |
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16-QAM: 0.0029% of baud rate |
| Demodulator timing |
Recovered clock within ± 13% jitter and |
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nominally within 40-60% duty cycle |
| Input impedance |
50 ohms |
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| MECHANICAL/ ENVIRONMENTAL |
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| Dimensions |
163mm x 111mm |
| Temperature |
0ºC to +60ºC |
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| FEATURES |
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| Eb/No indicator, in 0.25dB steps over 2.5dB to 15dB range |
| Persistent 64 x 64 pixel normalized constellation display |
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| BURST MODE |
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| SATCOM MODEM supports uncoded, convolutional and TCM encoded (K=7, rate ½ FEC) data in burst mode. Burst frame format and timing details may be obtained from user manual |
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| BER PERFORMANCE |
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| Figure 1 - BER PERFORMANCE |
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