general: dual conversion, superheterodyne, synthesized receiver.
dimension: height 2” width 3” length 14” weight: 2lb
frequency range: 1 mhz within either of the following ranges:
150.790 – 152.490 mhz (version 151)
173.300 – 173.999 mhz (version 173)
fine tuning: +/- 1.3 khz continuously variable w/ analog control.
center frequency variation relative to specified frequency: less than +/- .5 khz.
long term frequency drift: .2khz.
power supply: 12-14 vdc through external power jack. 9v (internal,
using 6 aaa batteries)
rf impedance: 50 ohms.
sensitivity: typical minimum discernable input level: -150 dbm
input level for 10 db s+n+d/n –131 db maximum
noise figure: 2.5 db typical with 50 ohm source.
image rejection: > 45 db
spurious emissions: < .2 nw
上面是指标，最小可识别的功率是150dbm，如果是这样，他的带宽是0.2k左右。问题转化为，此系统什么样的晶振能保证在各个温度下频偏不会超过200hz，他的发射是放在鸟身上的，总重量不会超过10g，发射的频率稳定度如何保障的？谢谢指教
