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23CM RX Down converter 23CM RX Down converter 23CM RX Down converter spectrum plot 23CM RX Down converter spectrum plot
23CM RX Down converter 23CM RX Down converter 23CM RX Down converter spectrum plot 23CM RX Down converter spectrum plot
23CM RX Down converter
The PE1CMO 23cm converter is a multi-purpose converter for receiving the 23 cm band at your 144 MHz HAM receiver.  The local oscillator is a low noise VCO with a small range. The PLL...

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The PE1CMO 23cm converter is a multi-purpose converter for receiving the 23 cm band at your 144 MHz HAM receiver. 

The local oscillator is a low noise VCO with a small range. The PLL reference is 2.5ppm with the extended temperature range, normal the stability is within 1ppm (1 kHz). The RF frontend uses Helical filter for a low loss but high performance bandpass filter. The frontend can be tuned from 1250 - 1300 MHz .

Dynamic range. The dynamic range is excellent. The mixer is a 17 dBm medium level mixer so that the total output IP3 is around +32 dBm.


Specifications:

Tuning range                                     1250 – 1300 MHz             bandwidth filters 25 MHz           
Gain                                                     22dB
Ripple                                                  +/- 1dB
Noise                                                   3dB
Output IP3                                         32 dBm
Local oscillator                                  1152 MHz                           (144 MHz out) for 1296 MHz


Stability                                               1 ppm (normal)                2.5 ppm from -10 / +60C
Power                                                 8 – 12V                                250mA
LO drive                                              17.5 dBm                            (60mWatt)
Antenna LO output                        lower then -55dBm        (international rules says lower then -50dBm)

Input connector                              N connector                      SMA on request
Output connector                          SMA                                     N on request
Dimensions                                       102 x 60 x 36mm              included flanges.
Options for wideband:                 display for tuning the converter with fixed IF out  (steps 12.5 kHz)

Converter is built in a splash water proof and RF closed aluminum case with 2 flanges for easy mounting.
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