7L12: Difference between revisions
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a 1.8 GHz low-pass filter and a 3 dB pad (to isolate the mixer from LPF reflections) to a 1<sup>st</sup> mixer. | a 1.8 GHz low-pass filter and a 3 dB pad (to isolate the mixer from LPF reflections) to a 1<sup>st</sup> mixer. | ||
The 1<sup>st</sup> LO is a YIG oscillator running at 2.095 GHz to 3.9 GHz, resulting in a 2.095 GHz 1<sup>st</sup> IF. | The 1<sup>st</sup> LO is a YIG oscillator running at 2.095 GHz to 3.9 GHz, resulting in a 2.095 GHz 1<sup>st</sup> IF. | ||
The 1<sup>st</sup> IF passes through a "traveling wave damper" (isolator), | |||
a 2.2 GHz LPF and a 10 MHz wide 2.095 GHz bandpass filter before reaching the 2<sup>nd</sup> mixer. | a 2.2 GHz LPF and a 10 MHz wide 2.095 GHz bandpass filter before reaching the 2<sup>nd</sup> mixer. | ||
The 2<sup>nd</sup> LO oscillates at 2.2 GHz (variable by | The 2<sup>nd</sup> LO oscillates at 2.2 GHz (variable by ±1 MHz) for a 2<sup>nd</sup> IF of 105 MHz, which is amplified, | ||
then filtered in a 3-stage helical filter with 3 MHz bandwidth before passing through a 3<sup>rd</sup> mixer to the final 10 MHz IF, | then filtered in a 3-stage helical filter with 3 MHz bandwidth before passing through a 3<sup>rd</sup> mixer to the final 10 MHz IF, | ||
variable resolution filters, and post-resolution amplifier to the "Function IF amplifier" that implements the linear or logarithmic detector. | variable resolution filters, and post-resolution amplifier to the "Function IF amplifier" that implements the linear or logarithmic detector. | ||
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| align="right" | $12,500 | | align="right" | $12,500 | ||
|- | |- | ||
! | ! 2020 Dollars | ||
| align="right" | $ | | align="right" | $31,000 | ||
| align="right" | $ | | align="right" | $20,400 | ||
| align="right" | $ | | align="right" | $25,500 | ||
| align="right" | $ | | align="right" | $27,350 | ||
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