Hey OM:

From the miniciruits.com app notes archive in 1999 i found this:

6. LO DRIVE.
The LO drive is critical since the function of the LO drive is to
switch the mixer diodes fully on and off for lowest distortion. So,
for optimum performance, select the mixer level to match the LO drive.
Mini-Circuits conveniently identifies its mixer levels by the LO drive
requirement; thus a Level 7 mixer refers to a LO drive level of +7
dBm. If there are constraints on the LO power available, select the
lowest level mixer closest to the available LO power. For example, if
+12 dBm LO drive is available, select a Level 10 mixer.


73 OM
de n8zu

O
Thanks all. *I got feedback from MCL. *Treat electrically as an
SRA-1-1.
And from memory and from another NG, 0.1 to 200 MHz @ +7dBm LO
injection.

John
GW0OAJ
--
JC Morrice