507 / Patriot Users Manual
Release 1.01
March 10, 2015
Part #74485
Printed in USA
Page
4
of 15
Figure 2 Patriot Front Panel
1.4 Internal Connections
With the Rear cover removed, several additional
connections are accessible:
The ChipKit Uno32 Arduino processing card
has an on-board mini-USB connector, accessible
at the rear of the PC board.
Or with the Top cover removed, the Port
Expander connector is available, as well as all
the connections to the ChipKit Uno32.
Figure 4 Internal Layout – shows the location of
the specific hardware functions of the Patriot.
2. 507 Front Panel
(Refer to Figure 2 above)
2.1 Basic Radio Controls
The soft on/off power switch is located at the
lower right beside the microphone jack on the
front panel.
A quick press on this button will let the 507 turn
on in about 5 seconds. The delay is normal as
the ChipKit is in the process of booting up. To
turn the 507 off, Press the Power Button for over
a second.
A special note, if an active USB cable is
connected to the ChipKit in the 507. The 507
will appear to be on. Only certain areas will be
active. But over all most of the 507 will be off.
The ChipKit does provide 5 and 3.3 volts to
some logic control and the DDS of the 507 radio
shield.
DC power from the external power supply is
switched to the radio circuitry. The radio is
protected from reverse voltage polarity by a
protection-diode that is placed between the
power source and switch.
The VOL (volume control) knob is beside the
Power button of the front panel and operates in a
typical manner, controlling the audio level of the
headphones or speaker.
Almost in the center is the RIT (Receiver
Incremental Tuning) knob, which controls the
frequency offset in the receive mode. The RIT
control has an adjustment range of
approximately ±0.5 kHz, which allows the
operator to tune the receiver to signals that are
slightly off frequency, without changing the
transmit frequency. The ±0.5 kHz RIT
adjustment range can be changed in the ChipKit
software. When the indicator on the knob is
centered — aligned with the “I” of RIT — the
radio has a normal receive offset of
approximately 800 Hz.
