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Lyra S module on development board can be used with external antennas (certified by Laird Connectivity) by routing the RF to
the RF antenna connector (IPEX MHF4) on the development board by removing 0R resistor R936 and fitting 0R resistor R937,
see
schematic below and PCB location for R936, R937.
Table 4: External vs Internal Antenna Connection
Lyra S External antenna connection
Lyra S Internal antenna connection
1.
IPEX MHF4 RF connector (20449-001E) Fitted.
2.
Fit 0R resistor (position R937 in below SCH) between
Lyra S module pin3 (RF_2G4) and IPEX MHF4 RF
connector (20449-001E).
3.
Leave Lyra S module pin2 (ANT_IN) open circuited
1.
Fit 0R resistor (position R936 in below SCH)
between Lyra S module pin3 (RF_2G4) and pin2
(ANT_IN).
2.
Do not Fit R937 and J3 (positions in below SCH).
3.
Lyra S pin40 (ANT_OUT) internal antenna PCB
layout MUST be followed.
R937 0R fitted to route RF to RF connector.
R936 not fitted.
R936 0R fitted to route RF to internal antenna.
R937 not fitted.
Figure 9: Lyra S for External antenna connection on Lyra S development board showing RF 50-Ohm RF trace
schematic (0R resistor R937 and RF connector J3)
Summary of Contents for Lyra S
Page 1: ...A Version 1 3...
