Jackson Labs LTE-Lite, User Manual

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© 2020 Jackson Labs Technologies, Inc. 23
LTE-Lite User Manual
18 RF-IN GPS Antenna RF
Input 1575MHz L1 GPS signal input.
0dBm max. Contains DC power
supplied to VANT pin 20 for
DC antenna amplifier power. Connect to passive or active
GPS antenna. 0dB to +30dB
antenna gain. 3.0V to 5.25V
antenna DC power
19 GND4 Ground Ground Ground. Connect all module
grounds together
20 VANT DC Antenna Bias
Power Input 0V to 5V max Connect DC power for antenna
power supply. Typically 3.3V or
5V. This power pin is internally
bypassed, and connected via
Bias-T to the antenna RF pin 18
21 +3.3VA +3.3V Power
Input +3.3V -0.1V/+0.2V. 0.06A
typical Main 3.3V DC Power Input Pin.
Internally bypassed
22 +3.3VB +3.3V Power
Input +3.3V -0.1V/+0.2V. 0.06A
typical Main 3.3V DC Power Input Pin
Internally bypassed
23 RESET# Reset Input Pull to ground for >50ms to
initiate a system reset Pull to ground to manually reset
system. Leave floating during
normal operation
24 CLOCKOUT/
ISP# RF Synthesizer
output, and In
System
Programming
(ISP) mode
initialization Do not pull low at any time.
3.3V CMOS output. Can drive
up to +/-10mA. ISP mode for
factory use only This pin generates the
synthesized RF output. Pin 7
indicates when this pin is active.
Do not pull low externally to
avoid initiating ISP mode during
power-on. Can be buffered by
external CMOS gate. Output
frequency is determined by
FS0/FS1/FS2 pins
25 FREQ_SEL0 Frequency Select
0 (LSB) Pull to ground to activate (0).
Leave floating (1) Frequency select 0. Pulling this
pin low activates one of the
syntheziser output frequencies
26 FREQ_SEL1 Frequency Select
1 Pull to ground to activate (0).
Leave floating (1) Frequency select 1. Pulling this
pin low activates one of the
syntheziser output frequencies
27 FREQ_SEL2 Frequency Select
2 (MSB) Pull to ground to activate (0).
Leave floating (1) Frequency select 2. Pulling this
pin low activates one of the
syntheziser output frequencies
28 WARMUP_
TRAINING TCXO Warmup
Indicator 3.3V CMOS (warmup), 0V
(warmup done) 3.3V CMOS output indicating
TCXO warmup after power-on.
Can drive an LED with up to
10mA. Stays high for about 1
minute after reset