High Quality PLL Frequency Synthesizer Develpment Board for Electronics DIY.
Well designed and crafted from quality circuit board with exquisite workmanship. This frequency synthesizer board is the combination of neat layout and stable performance. Ideal for ham radio hobbyists or school, science education.

Specifications:
Output frequency range: 137M-4.4GHz
Supply voltage: 4-9V (5VDC)
Output :
2.2GHZ--4.4GHz sine (fundamental)
137MHZ--2.2GHz squarewave (fundamental division)
Output : wideband output, strength: + 5dBm (programmable)
RF connector: SMA female head
Control Interface: Three-wire Serial Peripheral Interface Bus
Reference Clock: 10.000MHZ (default), through the interface to an external SMA
Weight: 16g
Connection:
The module can pin microcontroller LCD1602 / LCD12864 module connection (can be plugged directly Backward), convenient software debugging, both lock indicator (Lock). Pin correspond to the following:
GND ------------------------- GND
VDD (5V) ------------------- VCC
VO -------------------------- NC (empty)
RS -------------------------- NC (empty)
R / W ------------------------- MUXOUT
EN -------------------------- CLK
DB0 ------------------------- DATA
DB1 ------------------------- LE
DB2 ------------------------- CE (has 10K pullup)
DB3 ------------------------- GND (do not take)

Reference Clock:
10.000MHZ default reference clock is active clock or an external reference clock , you need to modify the three-way connection with a soldering iron, connect EXT_REF external reference .

Package Included:
1 x RF Source Frequency Synthesizer