Deity’s 2.4Ghz Protocol

Adaptive Frequency Hopping

Deity Connect divides time into so-called time-slots, during which the transmitter and receiver operate on the same RF channel and the Transmitter emits one packet. The duration of a time-slot is 1.5 msec. Deity Connect uses an advanced Adaptive Frequency Hopping protocol that actually uses 4 core channels and 5 trail channels that it will test out and look for better channels than it’s 4 core channels. During each hop into a time-slot the system sends 1 or 2 packets of data. At any given time the BP-TX is hopping between the 9 different frequencies in a pattern. And because Deity Connect is a bi-directional transceiver system that is always scanning, mapping out the whole 2.4Ghz frequency band and coordinating its signal, it can plan ahead the 70 frequency hops.

This is an example of our AFH hop sequence (core channels set in multi-colors, trial channels are in black/gray) The channels correspond to center frequencies.

But What Does That Really Mean?

WiFi and Deity’s Protocol are opposites. WiFi operates much like a rolling shutter in pulses and slows down the pulses to accommodate other signals and other devices on the 2.4Ghz band. Deity’s Protocol takes advantage of the passive nature of WiFi protocol and bosses it around by injecting itself between these pulses. And while it doesn’t just outright blast WiFi and stop it from working, it coordinates its time-slot hops with the pulses of all the WiFi devices around it. This allows for our signal to not get stepped-on nor stopped for other traffic. In layman’s terms, WiFi can be thought of as a beta signal and Deity’s Protocol can be thought of as an Alpha signal setting the pulse rhythm for all the 2.4Ghz traffic in the area.
In even simpler terms, Adaptive Frequency Hopping is like a motorcyclist who is lane splitting during heavy traffic on a highway. Sliding in and out of lanes causing the cars to slide aside to make room when the motorcyclist buzzes by them. We are lane splitting using up to 9 lanes on an 18 lane highway.

QUAD Antenna Design

The DUO-RX is designed to maximize the possibilities of receiving even the faintest of signals. We have designed it with a dual radio setup so each transmitter is picked up with its own transceiver chip. Each radio chip is capable of true diversity and is connected to two different antennas. Each chip features its own SMA antenna port that allows the user to feed it RF signal from a whole host of different 2.4Ghz SMA antennas on the market from directional, plane, and collector dishes to even experimental antennas like Can-tennas. On the flip side, each radio chip is also connected to an internal horizontally mounted dipole PCB antenna.This allows for the DUO-RX to receive the max transmissions on the horizontal plane in case the BP-TX has been mounted sideways on an actor. These also act as omni-directional pickup antennas in case an actor has wandered out of view of a directional shark fin antenna plugged into the SMA port.
In layman’s terms, more antennas = more chances to grab a transmitter’s signal.

But What About RF Interference And Packet Loss?

Everything above describes Deity Connect’s preventative measures from losing signal. But how does the system actually handle a RF Hit? Simply put, it has a redundancy transmission in case an RF Hit might have been suspected. Because the transmitter is really a transceiver, it can also scan and read the background RF noise levels of an area. If the RF noise levels go beyond a threshold on a certain channel during a packet transmission during a time-slot, then the next hop will include its own packet data and the packet data from the last hop. The DUO-RX then takes the packet data that was sent twice and checks it against the stream and inserts any missing data. The whole system runs on a buffer system much like online video services and satellite radio when you drive under a bridge (they just happen to be using up to a full minute of buffer). Our buffer system allows the system to retransmit a packet 3 times in case a bad hop was mis-coordinated. “Bad” time-slots are also recorded in a log to make the system more stable while it runs.
Deity Microphones is committed to making unique microphones and products that get the job done. Launched by a TV location sound mixer, Deity Microphone’s roots are planted in knowing what kind of equipment working professionals need in their kit.

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