| Bit Sync Input |
Number Channels |
Four independent data synchronization and clock generation channels |
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Programmability |
Each PCM input channel programmed independently |
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Sources & Type |
One single-ended and one differential input per channel, programmable. |
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Level |
300 mV to 10 VP-P |
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Impedance |
50 ohms, 75 ohms, or 10 Kohms (single-ended), programmable; 110 ohms (differential) |
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Operating Range |
3 kbps to 30 Mbps, NRZ codes
3 kbps to 15 Mbps, all non-NRZ codes with optional support to 50 Mbps and 25 Mbps respectively |
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Codes |
NRZ-L/M/S, BIØ-L/M/S, Plus + and – randomized codes for NRZ-L |
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Derandomizer |
Forward & reverse, 5 lengths: 9, 11, 15, 20, 23, programmable |
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Polarity |
Normal or inverted, programmable |
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Tracking Range/Deviation |
Programmable up to 20% of data rate |
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DC Offset |
DC offset plus peak signal plus noise <= 10V |
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Loop Bandwidth |
Continuously programmable with 0.02% resolution from 0.02% to 5.00%. |
| Bit Sync Performance |
Bit Error Rate |
Within 1.0 dB of theoretical to maximum data rate |
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Jitter |
Jitter not to exceed 0.1% of a bit interval |
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Acquisition Range |
Up to ± 5% of programmed data rate |
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Acquisition Time |
Within 50 bits, average, random data within 0.5% deviation from the programmed data rate, Eb/No = 15 dB |
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Sync Maintenance |
Retains sync at Eb/No = 3 dB for NRZ at 50% transition density |
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Bit Slippage |
Maintains phase with BIØ codes at Eb/No = 12 dB with over 2,000 continuous ones or zeroes and at Eb/No = 0 dB for random data |
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Baseline Variation |
No degradation beyond 1 dB from theoretical performance curve with a superimposed wave form equal to 100% of the peak-to-peak signal input at 0.1% of the bit rate, BIØ codes |
| Bit Sync Output |
Level |
+3.3V @50 mA, short circuit protected |
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Codes |
Programmable PCM output codes, (R)NRZ-L/M/S, BIØ-L/M/S |
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Clock |
0º or 180º, programmable |
| PCM Input |
Number Channels |
Four independent PCM record channels |
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Programmability |
Each PCM input channel programmed independently |
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Sources & Type |
One bit sync, one single-ended and one RS422 differential input per channel, programmable. |
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Level |
+3.3V @ 50 mA, short circuit protected; single-ended RS422; differential |
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Impedance |
75-ohm; single-ended (factory adjustment for 50 ohm or 10 Kohm) 110 ohm; differential |
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Rate |
3 kbps to 30 Mbps with option to 50 Mbps |
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Code |
NRZ-L and R-NRZ-L |
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Data Polarity |
Normal and inverse, programmable |
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Clock Phase |
0º or 180º , programmable |
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Clock Duty Cycle |
50% +/- 10% |
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Mode |
Throughput |
| PCM Performance |
Time Data Resolution |
+/- 100 ns |
| PCM Output |
Level |
+3.3V @ 50 mA, short circuit protected |
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Rate |
3 kbps to 30 Mbps with option to 50 Mbps |
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Data |
(R)NRZ-L/M/S, BIØ-L/M/S |
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Inter Channel Skew |
Less than 1 ms |
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Mode |
Loop-through of input signal (record time only) or Playback from file; programmable |
| Time Input |
Number Channels |
1 independent Time channel |
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Programmability |
Time input channel programmed independently |
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Time Input Source |
External or internal, programmable |
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Level |
Signal level 0.5 to 10 VP-P from mark; 3-1 nominal (mark to space relationship); external |
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Impedance |
10 Kohm |
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Code |
IRIG A, B, G modulated carrier input. |
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Internal Time |
On-board timer seeded from any source internal to computer; e.g., computer clock, GPS receiver, etc. |
| Time Output |
Time Code Rate |
IRIG A, B, G modulated carrier |
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Level |
7V, typical P-P into 10-Kohm load |
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Mode |
Loop-through of input signal (record time only) or playback from file; programmable. |
| Reference Clock Input |
Frequency |
10 MHz |
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Source |
Internal or External; programmable |
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Duty cycle |
50% +/- 5% |
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Signal type |
Single-ended sine wave |
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Levels |
1 to 8 VP-P |
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DC offset |
<10% of VP-P level centered around ground |
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Input impedance |
50-ohm or 75-ohm (programmable). |
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SNR |
≥ 50 dB |
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Internal Clock Accuracy |
Factory tuned to <1 ppm
Drift over lifetime of 3.5 ppm |
| Interboard Time Bus |
Level |
+3.3V @ 50 mA, short circuit protected |
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Max Daisy Chain Delay |
20 ns |
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Control |
Each board capable of operating as Master or Slave |
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Max Record Throughput |
240 Mbps |
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Max Playback Throughput |
240 Mbps |
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Max Aggregate Throughput |
2 Gbps |
| Electrical and Environmental |
Form Factor Temperature |
Full-length, PCI-66 MHz, 64bit, based module 0º to 50 ºC (operating), -20° to 80 °C (storage) |
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Humidity |
20 to 95% noncondensing |
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Power |
12 W typical; +3.3V @ 3.4A |
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Status |
Sync, input, amplitude, rate deviation via PCI bus |
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Connectors |
High Density D-Sub |
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Programming |
Programming via PCI bus, 32-bit |
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