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CDA-2990 8通道/10 MHz时钟分配设备|安立 (在产)

8通道

10 MHz时钟分配设备

GPS驯服恒温晶体振荡器(OCXO)

参考价格 : RMB 15,305.
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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


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Conditions

Specifications are valid at 25 °C unless otherwise noted.

Input

Table 1. Reference Clock Input
Frequency10 MHz
Power range0 dBm to 20 dBm (0.632 Vpk-pk to 6.325 Vpk-pk into 50 Ω)
CouplingAC
Impedance50 Ω
Table 2. PPS Input
Voltage, recommended minimum2.5 V
Voltage, recommended maximum5 V
Voltage, operating maximum5.3 V
Voltage, absolute maximum6.8 V
Voltage, maximum logic level low (VIL)0.74 V
Voltage, minimum logic level high (VIH)1.8 V
Compatible logic familiesTTL, CMOS, LVTTL, LVCMOS

Output

NoteIn addition to the ability to distribute external sources, the CDA-2990 with GPSDO can also generate clock and PPS signals internally. To activate the GPSDO, move the switch on the front panel to INTERNAL.
Table 4. Clock Output
Frequency10 MHz
Frequency accuracy without GPSDODependent on input
Frequency accuracy with GPSDO, unlocked25 ppb
Power10 dBm, typical
Voltage1.4 Vpk-pk
WaveformSquare wave
Impedance50‎ Ω
CouplingAC
Table 4. PPS Output
Voltage, maximum5 V
Positive duty cycle20%, typical
Period1 s, typical
WaveformLogic-level pulse
Accuracy
Without GPSDODependent on input
With GPSDO, unlocked[1]<±20 μs
With GPSDO, locked50 ns

GPS Disciplined Oscillator (GPSDO)

Table 5. Active antenna
Voltage5 V
Power0.7 W
GPS FrequencyL1, C/A 1,574 MHz
GPS AntennaActive or passive
Table 6. Sensitivity
Acquisition-142 dBm
Tracking-158 dBm
Table 7. GPS TTFF
Cold start<45 s
Warm start1 s
Hot start1 s
Allan deviation (ADEV)[2]1 × 10-12
Warm-up/stabilization time[3]<5 min
NoteNI recommends periodically locking the GPS for at least 1 hour to recalibrate the GPSDO module accuracy.

Power Supply


Input voltage6 V to 15 V DC
Input power6 W maximum

Physical Characteristics

Table 8. Physical Dimensions
(L × W × H)4 in. × 17.19 in. × 1.75 in. (10.16 cm × 43.66 cm × 4.45 cm)
Weight2.6 lbs (1.18 kg)

Hardware Front Panel

Figure 1. Clock Distribution Accessory Front Panel

1378

Environment

Maximum altitude

2,000 m (800 mbar) (at 25 °C ambient temperature)

Pollution Degree

2

Indoor use only.

Operating Environment

Operating temperature

23 °C ± 5 °C, room temperature.

Relative humidity range

10% to 90%, noncondensing (tested in accordance with IEC 60068-2-56)

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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