描述
ULN-8R是一款突破性产品，是雷达应用的8频、80MHz至120MHz频率参考。ULN-8R内置多达8种不同的低g灵敏度晶体频率，可通过3引脚TTL接口进行现场信道选择。ULN-8R被设计为雷达应用、卫星通信、广播以及测试和测量设备的可选低相位噪声频率参考。
ULN-8R只有3 x 2.5 x 0.7英寸的小尺寸，根据MIL-STD-202G、M213条件C进行冲击测试，根据MIL-STD 202G、M204条件C进行振动测试，老化时间小于每年1ppm。ULN-8R具有扩展温度范围，并且工作在从+9V到+18V电压，功耗低于0.7W。ULN-8R可提供8个自定义频率，或从现成的频率范围（如106MHz至109MHz）中进行选择。
ULN-8R的典型相位噪声性能（在107MHz载波），在10Hz时为-104dBc/Hz，在100Hz时为-131dBc/Hz、在1KHz时为-152dBc/Hz和在10KHz时为-160dBc/Hz，在1MHz时为-168dBc/Hz。
特点
- 8频超低相位噪声：80MHZ到120MHZ
- 本底噪声-166dBc/Hz典型值
- 相位噪声显著低于传统产品
- 集成有源电源滤波器
- 完整的输入电路保护
技术参数
| Unit | Min | Nominal | Max | Note | |||
| NOMINAL FREQUENCY | MHz | 97 | 109.6 | See table 1 for set of frequencies | |||
| TEMPERATURE RANGE Operating | °C | -55 | 85 | ||||
| POWER SUPPLY | V | 15 | ±5% | ||||
| CONSUMPTION | mA | 125 | |||||
| OUTPUT SIGNAL WAVEFORM | Sine wave | ||||||
| Level | dBm | 6 | 9 | ||||
| Harmonics | dBc | -55 | |||||
| Sub harmonics | dBc | None | |||||
| Non harmonics | dBc | -110 | |||||
| Load | Ohm | 50 | ±10% | ||||
| FREQUENCY STABILITY | |||||||
| Vs temperature range | ±ppm | 20 | |||||
| Vs power supply | ±ppm | 0.5 | |||||
| Vs load | ±ppm | 1 | |||||
| AGING Medium/long term stability Short term stability | ±ppm ±ppm | 1 day 1 ms | 1 month 10 ms | 1 year <±1 100 ms | After continuous operating for: <±10 for 10 yrs (<+3 / -7 ppm typ) | ||
| 1 S | |||||||
| PHASE NOISE Static Conditions Typical Dynamic Conditions | dBc/Hz dBc/Hz | 10 Hz -104 -55 | 100 Hz -131 -82 | 1 Khz -150 | 10 Khz -160 | 100 Khz -166 | See table 2 |
| MECHANICAL CONDITIONS Shock Thermal shock Pre-aging thermal shock Vibration Humidity | NoteMIL-STD-202G M213 Condition C – 100 g, 6 msec ½ sine compliant to MIL-STD-202 Method 107 Condition A components cycled during manufacturing for 32 cycles -55 to 125 C, 30 min soak timeVibration per MIL-STD-202, Method 214, Cond. A, Method I, and MIL-STD-202G, M204 Condition C, 10 g peak, 55 to 2000 Hz, 1 sweep per axis Humidity per MIL-STD-202, Method 103, Cond. B | ||||||
