Updated 6-13-08.  Updated to reflect Revision A
Updated 8-11-09.  Add information and revision history
Updated 1-20-09.  Move Parts List to this page.

SLIM-MXR-3, Mixer, size-A
Use your mouse's "right click" and "Save Link" to download:
SKSLIM-MXR-3.sch Rev A , Schematic, in ExpressPCB software.
b.  LAYSLIM-MXR-3.pcb Rev A, Layout, in ExpressPCB software.  Use this drawing to locate the parts on the SLIM Board.
c.  PLSLIM-MXR-3      Parts List. Maintained only on this page.
d.  PWB-MXR-ADE.pcb Rev 0 Base artwork for PWB, in ExpressPCB software.  Use this drawing to order the pwb from Express.  This is the base configuration for design of the SLIM-MXR-3.  Click to get full information for a basic mixer design on the PWB-MXR-ADE page.

    The SLIM-MXR-3 was designed to be used for the Mixer 3 addition to the MSA when adding the Tracking Generator.  It was a replica of SLIM-MXR-1, using the same schematic and parts list.  Since then, SLIM-MXR-3 has been revised and has its own documentation.
J1 is the Local Oscillator input port.  J3 is used as the RF Input port.  J2 is used as the down converted IF output port.  For the MSA/TG, J2 is the Tracking Generator Output, operating from 0 MHz to 1000 MHz.  Pin 2 of the ADE-11X is connected to its internal diode bridge, which is responsive down to 0 Hz.  This module can be used in other applications, but it is probably better to use the basic PWB-MXR-ADE and custom design the components for your specific application.
    J1 expects an input level of approximately, +10 dBm.  J3 expects an input level of approximately, +10 dBm.  Minicircuits specify the ADE-11X conversion loss at -7.5 dB.  I measured the ADE-11X conversion loss at -6.5 dB.  The output level at J2 should be approximately, -10 dBm to -12 dBm.  I would caution the user that the J2 output also contains many frequency products, in addition to the expected 0-1000 MHz.  The SLIM-MXR-1 Rev 0 is very easily to upgrade to Rev A.

Revision History
Original Release: Released 7-01-2007
SLIM-MXR-3 Rev 0, using SK-MXR-1 Rev 0, PWB-MXR-ADE Rev 0, PLSLIM-MXR-3 Rev 0

Revision A: Revised 6-11-08
1.  Added a 2.5 dB attenuator network in the L port path to the mixer.  This provides a better impedance match between the LO input connector -  J1, and the mixer, which, improves the mixer isolation.
2.  Added a 14 dB attenuator network in the R port path to the mixer.  This provides a better impedance match between the R input connector -  J3, and the mixer.
3.  Added a 2 pF chip capacitor to the mixer pin 3 junction to ground (C29 position).  This helps match the mixer to the 14 dB attenuator network and J3.
These modifications greatly improve the mixer isolation.  But, it makes it necessary for the LO Drive at J1 to be approximately +9.5 dBm.  To use this module as a mid-drive (+7 dBm), the attenuator must be removed.  However, I have tested this module with as little as +4.5 dBm at J1 (+2 dBm on the ADE-11X's L port) with only an additional -1 dB of conversion loss.

Revised 9-08-2008: errors on Parts List, revised to PLSLIM-MXR-3 Rev B. No other changes.

SKSLIM-MXR-3, Schematic of SLIM-MXR-3
    The coupling resistor R15 is a short circuit (zero ohm resistor), allowing very low frequencies to pass.

Parts List, PLSLIM-MXR-3
Revision B,  9-8-2008  (updated 1-23-2016)
Desig.         Value       Part Number                                    Digikey Number                 Cost                        Notes
C5                                                                                                                                                RevA, deleted 100 pf
C25                                                                                                                                              RevA, deleted 100 pf
C29          2 pF       CL21C020CBANNNC                                1276-2549-1-ND            0.10     was
R1           330         MCR10ERTF3300                                  RHM330CHCT-ND           0.04      was MCR10EZHF330/RHM330CCT-ND
R5           15           MCR10ERTF15R0                                   RHM15CHCT-ND           0.04     was MCR10EZHF15.0/RHM15.0CCT-ND
R9           330         MCR10ERTF3300                                  RHM330CHCT-ND           0.04      was MCR10EZHF330/RHM330CCT-ND
R21           75         MCR10ERTF75R0                                  RHM75CHCT-ND            0.04      was
R25         120         MCR10ERTF1200                                  RHM120CHCT-ND           0.04       was MCR10EZHF120/RHM120CCT-ND
R29           75         MCR10ERTF75R0                                  RHM75CHCT-ND            0.04      was MCR10EZHF75.0/RHM75.0CCT-ND
J1          SMA     optional Molex, 538-73391-0070                  WM5544-ND                     4.74
         SMA     optional Molex, 538-73391-0070                  WM5544-ND                     4.74
         SMA     optional Molex, 538-73391-0070                  WM5544-ND                     4.74
MXR    ADE-11X    ADE-11X                                              Minicircuits                        2.95   
R15           0          MCR10EZHJ0.0                                      RHM0.0ACT-ND               0.08          or use jumper
PWB    Circuit Board    PWB-MXR-ADE                                                                       3.28   

LAYSLIM-MXR-3, Parts locator for SLIM-MXR-3
slim/layslim_mxr_3.gif  slim/mixer1.JPG
    The photo was taken before C29 and attenuators were added to the board.