User's Manual

Model 2112 Modular Tag Manual
Page 10 of 16
FCC Section 15.212 Compliance
The PLUS 2112 Tag complies with FCC Section 15.212 rules concerning single modular transmitters in the
following:
15.212 (a)
REQUIREMENT:
“Single modular transmitters consist of a completely self-contained radiofrequency transmitter device
that is typically incorporated into another product, host or device. Split modular transmitters consist of two
components: a radio front end with antenna (or radio devices) and a transmitter control element (or specific
hardware on which the software that controls the radio operation resides). All single or split modular
transmitters are approved with an antenna. All of the following requirements apply, except as provided in
paragraph (b) of this section.”
IMPLEMENTATION:
The 2112 Modular Tag consists of a microcontroller (also referred to as the processor) with timing
controlled by a crystal, a burst mode oscillator transmitter, and an antenna. There is also a connection
provided for an external 3 volt battery.
The microcontroller wakes up at one of 6 preset time intervals set by a component at the time of
manufacture: 1, 6, 8, 10, 15, or 20 times a second. When the microcontroller wakes up, it turns on the rest of
the Tag circuitry, then calculates and sends a packet of multiple bits spaced 500nS apart to key the
transmitter. The transmitter generates a single UWB burst for each logic 1 of digital data presented to it. The
transmitter then sends the UWB burst to the antenna.
When done, the microcontroller sets the rest of the Tag circuitry on the 2112 to power down, goes back
into its sleep mode, and waits until the set time interval is reached again to wake-up and repeat the process.
The 2112 Module Tag documentation defining the layout, board material, circuitry, and components, is
defined in PLUS documentation:
• 300-0268A, PWB, 2112 TAG Module.
• 200-0275A PWA, 2112 TAG Module.
15.212 (a) (1) (i)
REQUIREMENT:
Shielding of radio elements:
IMPLEMENTATION:
See 15.212 (b), limited modular approval.