8通道
10 MHz时钟分配设备
GPS驯服恒温晶体振荡器(OCXO)
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8通道,10 MHz时钟分配设备
CDA-2990用于同步USRP软件无线电系统。它可接受外部10 MHz和每秒脉冲(PPS)输入信号,同时将信号放大并分配到八个输出端口。CDA-2990提供了用于分配外部信号的配置选项。您还可以选择启用GPS驯服振荡器(GPSDO)选件,该选件集成了GPS驯服恒温晶体振荡器(OCXO),可在内部生成10 MHz和PPS信号。
产品编号: 784305-01 | 784306-01
Specifications are valid at 25 °C unless otherwise noted. Maximum altitude 2,000 m (800 mbar) (at 25 °C ambient temperature) Pollution Degree 2 Indoor use only. Operating temperature 23 °C ± 5 °C, room temperature. Relative humidity range 10% to 90%, noncondensing (tested in accordance with IEC 60068-2-56)Conditions
Input
Frequency 10 MHz Power range 0 dBm to 20 dBm (0.632 Vpk-pk to 6.325 Vpk-pk into 50 Ω) Coupling AC Impedance 50 Ω Voltage, recommended minimum 2.5 V Voltage, recommended maximum 5 V Voltage, operating maximum 5.3 V Voltage, absolute maximum 6.8 V Voltage, maximum logic level low (VIL) 0.74 V Voltage, minimum logic level high (VIH) 1.8 V Compatible logic families TTL, CMOS, LVTTL, LVCMOS Output
Frequency 10 MHz Frequency accuracy without GPSDO Dependent on input Frequency accuracy with GPSDO, unlocked 25 ppb Power 10 dBm, typical Voltage 1.4 Vpk-pk Waveform Square wave Impedance 50 Ω Coupling AC Voltage, maximum 5 V Positive duty cycle 20%, typical Period 1 s, typical Waveform Logic-level pulse Accuracy Without GPSDO Dependent on input With GPSDO, unlocked[1] <±20 μs With GPSDO, locked 50 ns GPS Disciplined Oscillator (GPSDO)
Voltage 5 V Power 0.7 W GPS Frequency L1, C/A 1,574 MHz GPS Antenna Active or passive Acquisition -142 dBm Tracking -158 dBm
NoteNI recommends periodically locking the GPS for at least 1 hour to recalibrate the GPSDO module accuracy.Cold start <45 s Warm start 1 s Hot start 1 s Allan deviation (ADEV)[2] 1 × 10-12 Warm-up/stabilization time[3] <5 min Power Supply
Input voltage 6 V to 15 V DC Input power 6 W maximum Physical Characteristics
(L × W × H) 4 in. × 17.19 in. × 1.75 in. (10.16 cm × 43.66 cm × 4.45 cm) Weight 2.6 lbs (1.18 kg) Hardware Front Panel
Environment
Operating Environment
1 Over a 3-hour period at 25 °C (OCXO, no motion).
2 At 10 ks (OCXO, GPS locked, no motion).
3 To 1 × 10-8 accuracy
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