© Copyright 2013 Zephyr Engineering, Inc
UDPSDR-
HF2 User’s Manual
4
Version 3.5
– 3 October 2013
1.1.2.2 P3 and P4
– Optional Filter Headers
Optional headers P3 and P4 can be used to replace FL1 with a daughter card
containing user-defined mixing, filtering and/or amplification. The user must remove R21
and R22 and install headers at P3 and P4 (Molex part #87759-0664, Digi-Key part
#0877590674-ND). The anti-aliasing filter between the LNA and the ADC will also have
to be modified in order to pass higher frequencies, if this is required. Please consult the
factory for customization options.
Headers P3 and P4 are available as a user option. See Table 1 for P3 and P4 pin
connections.
P3/P4 pin number
P3 function
P4 function
1
+3.3V
+3.3V
2
+3.3V
+3.3V
3
on-board FL1 LPF input
RF to LNA input
4
RF from attenuator output
on-board FL1 LPF output
5
GND
GND
6
GND
GND
Table 1 - P3 and P4 Header Pin Connections
1.2 BeMicroSDK Connectors, Switches and LEDs
See Figure 4 for BeMicroSDK connector, switch and LED locations.
Figure 4 - BeMicroSDK Connectors, Switches and LEDs
1.2.1 BeMicroSDK Connectors
There are three connectors on the BeMicroSDK: one USB type A, one Ethernet RJ-45
and one 80-contact MEC edge connector.
X602 - Ethernet
X201 - USB
S502-S504
– User Buttons
SW1
– User Switches
V701, V703, V704
– Status LEDs
X701
– MEC Connector
LED1-8
– User LEDs
Pin 1
