描述
ULN-1100是一款非常小的GPSDO，具有各种100MHz输出、几个10MHz输出、分配放大器和一个具有-160dBm跟踪能力的高性能50通道GPS接收机。所有输出都通过GPS系统与UTC同步频率和相位，从而提供比铯钟更好的长期性能。通过在一个紧凑的板中提供100MHz和10MHz参考，该单元非常适合雷达和卫星通信设备中使用的超低相位噪声上变频系统。
ULN-1100背向安装，功能与FireFly-IIA GPSDO兼容，并在相同的占地面积内提供更高的性能和附加功能。ULN-1100通过向航空电子系统提供3D速度矢量、姿态/倾斜信息、速度、航向、高度（MSL和GPS高度）、位置、时间、日期、频率、时间戳和健康信息，为机载应用提供特殊支持。
ULN-1100体积仅为1.5×4.0英寸，可提供Stratum-1的长期性能，24小时内平均每万亿份（5E-012）性能优于5份，具有温度范围、热稳定性、g敏感性和冲击/振动不敏感性等多种选择。ULN-1100内置100MHz双端口分配放大器，具有+13dBm正弦波输出，以及10MHz正弦波和LVDS输出。ULN-1100还提供坚固耐用、扩展温度范围、低g振荡器选项，适用于要求苛刻的应用。对于关键应用，ULN-1100提供了直接冗余功能，允许多个单元彼此菊花链连接，以提高可靠性。
ULN-1100可根据稳定性/成本要求订购以下OCXO选项：
100MHz和10MHz：单层晶振，标准温度；双层恒温晶振，标准温度；双层恒温晶振，扩展温度范围。
特点
- 正弦波、CMOS、LVDS输出
- -162dBc/Hz本底相位噪声
- 针对Ka/Ku/K频带的上变频进行了优化
- NMEA-0183 SCPI-99即插即用
技术参数
| Module Specification: | |||||
| 1 PPS Accuracy | ±30ns to UTC RMS (1-Sigma) GPS Locked | ||||
| Frequency Accuracy | Better than ±3E-010 after 1 hours operation with GPS locked | ||||
| Holdover Stability | <±7us over 24 Hour Period @+25°C (No Motion) | ||||
| ADEV | 1s to 1000s: 5 to 9E-12 with GPS lock typical | ||||
| 1 PPS Outputs (OCXO Flywheel Generated) | Three outputs: 5V CMOS, LVDS, and RS-232 level output | ||||
| 10/100MHz Outputs (9 outputs total, 7 @100MHz, 2 at 10MHz) | 4x LVDS 100MHz, 2x +7dBm, 1x CMOS, 1x Sine 10MHz, 1x LVDS 10MHz | ||||
| RS-232 Control | Full control via SCPI-99 Control Commands, NMEA-0183 | ||||
| GPS Frequency | L1, C/A 1574MHz | ||||
| GPS Antenna | Passive or Active, 5V | ||||
| GPS Receiver | 50 Channels, Mobile, GPS, WAAS, EGNOS, MSAS supported, Galileo ready | ||||
| Sensitivity | Acquisition -144 dBm, Tracking -160 dBm | ||||
| GPS TTFF | Cold Start – <45 sec, Warm Start – 1 sec, Hot Start – 1 sec | ||||
| TTL Alarm Output | GPS Unlock and Hardware Failure indicator | ||||
| Warm Up Time / Stabilization Time | <10 min at +25°C to 1E-09 Accuracy Typ. | ||||
| Supply Voltage (Vdd) | 11.0V to 16.0V DC Nominal | ||||
| Power Consumption | < 4W at +25°C with DOCXO | ||||
| Operating Temperature | -25C to +75C (+85C extended temp range option) | ||||
| Environmental Conformance | MIL-STD-202, Method 204, Condition I-A | ||||
| Storage Temperature | -45°C to +85°C | ||||
| Oscillator Specification: | |||||
| Frequency Output | Both 10MHz, and 100MHz outputs | ||||
| 10/100MHz Retrace | ±2E-08 After 1 Hour | ||||
| Frequency Stability | ±2.5E-010 over temperature, low-g option: ±3E-010 per g per axis | ||||
| Output Amplitude | 100MHz: LVDS, CMOS 5V, +7dBm Sine. For 10MHz: LVDS, +12dBm Sine | ||||
| Warm Up Time | < 12 min | ||||
| Phase Noise | 100MHz Out | 10MHz Out | |||
| 1Hz | -60dBc/Hz | -100dBc/Hz | |||
| 10Hz | -95dBc/Hz | -125dBc/Hz | |||
| 100Hz | -118dBc/Hz | -140dBc/Hz | |||
| 1kHz | -140dBc/Hz | -142dBc/Hz | |||
| 10kHz | -155dBc/Hz | -145dBc/Hz | |||
| 100Khz | -160dBz/Hz | -145dBc/Hz | |||
| Designed Lifetime | >10 years | ||||
