LMH1983 Evaluation Kit Users Guide
Page 3 of 25
LMH1983 EVALUATION BOARD OVERVIEW
The following block diagram shows an overview of the LMH1983 evaluation board and
general location of the main features, which will be discussed in the following sections of
this manual.
Applying power to the board:
The default configuration to apply power is to apply +5V across the top two pins on J8.
With a jumper on JP17, and on board LDO is used to generate the 3.3V rail that powers
the circuits on the evaluation board.
Alternately, JP17 may be removed, and a 3.3V rail may be applied directly to the bottom
two pins of J8.
LMH
1981
J2
LMH1983
Quad
2:1
MUX
VCXO
X2
J8
J1
J3
J7
J4
J6
J5
LP
3878
Power
Header
Analog
Ref. In BNC
Status LEDs
VCXO
X1
LPF
CLKout1
SMA
CLKout4
SMAs
CLKout3
SMA
CLKout2
SMA
HVF
inputs
Syncs
EXT.HVF
CLK
(VCXO
or SMA)
CLK In
SMA
Power LEDs
J9
USB
Port
