wet sounds A-Link Mk2 WS-A-LINK SR KIT 2.4 Ghz Send & Receive Audio Kit User Manual
- June 5, 2024
- wet sounds
Table of Contents
- Preliminary ID concepts provided by Wet Sounds
- Overview Eleven
- Motherboard PCB footprint and Batt dimensions
- Windshield mount and pigtail detail
- Keypad UI configuration
- SKAA Bond Button / SKAA Indicator Standard Definition
- Signal Block Diagram
- Power Block Diagram
- Power States
- Battery Life Calculation
- Per Unit Budget
- Audio Specs
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
wet sounds A-Link Mk2 WS-A-LINK SR KIT 2.4 Ghz Send & Receive Audio Kit
Preliminary ID concepts provided by Wet Sounds
Overview Eleven
Motherboard PCB footprint and Batt dimensions
Windshield mount and pigtail detail
Keypad UI configuration
Notes
- Buttons have a “clicky” , responsive tactile feel (to enable multi-click commands)
- Membrane is UV stable, sealed and water proof
- LED light pipes are embedded in enclosure wall adjacent to membrane keypad — these light pipes do not run through the membrane itself
SKAA Bond Button / SKAA Indicator Standard Definition
Signal Block Diagram
Notes
- The BATT LED is shown on the power block page
- The POWER BUTTON is shown on the power block page
Power Block Diagram
Notes
- Signals marked with connect to the Signal Block page
- Ground Loop detection/smart splitting of grounds (for hum/buzz avoidance) happens only at power up and when mode (Tx/Rx) is toggled
- The unit is configured to be able to operate in either Tx or Rx mode while charging
- Some users may opt to keep their units connected to 5V power at all times — this mode of operation is supported
Power States
Notes
- “VO” means Virtual Off —this is a power saving state for SKAA transmitters, triggered by lack of audio (silence).
- In VO state, Ginseng’s RF section is shut off causing all Bonds to drop (all Bonded SKAA receivers are dropped)
- “Standby” is a power saving state for SKAA receivers.
- in Standby state, Ginseng shuts off the ADC, DAC and buffers
- “Sleep” is a power saving state for SKAA receivers. Sleep is triggered by a loss of Bond.
- In Sleep state, the SKAA receiver improves on the power saving performance of Standby state by also duty cycling the SKAA radio. You can tell the unit has gone to sleep when the SKAA indicator shuts off and the Power LED dims
- Powering off certain chips will be effected by holding them in RESET
- ON/OFF is achieved by a press & hold of the Power Button by the user (this transition is not shown in these power state diagrams)
Battery Life Calculation
Supply
Demand
Per Unit Budget
BOM
| Component | Mk2 |
|---|---|
| Ginseng | 6.50 |
| ADC | 1.05 |
| DAC | 0.45 |
| Batt Charge Chip | 0.75 |
| PCB | 1.00 |
| 3.3 V Regulator | 0.50 |
| LiPo Battery | 2.50 |
| Buttons and LEDs | 0.35 |
| Pigtail cable, SR, Y & connectors | 1.50 |
| FE Antenna | 0.50 |
| Enclosure | 1.50 |
| Windshield Clip / Mounting Clip | 0.70 |
| Other Electrical | 1.75 |
| Other Mechanical | 1.00 |
| Total | 20.05 |
Manufacturing / Testing
| SKU | Cost |
|---|---|
| Mk2 2-pack | 40.10 |
| Packaging & Manual | 1.30 |
| LOP at 18% | 7.45 |
| Total (manufactured 2-pack) | 48.85 |
Notes
- All figures are USD
- Costs are estimates only
- Charging Adapters and cables are not included (we assume the user has plenty of those already)
- Allocations for master carton are not included
Audio Specs
| Parameter | Spec Value |
|---|---|
| Input full scale | 1.0 VRMS |
| Input impedance | 10 k ohms |
| Output full scale | 1.0 VRMS |
| Minimum load required at output | 1k ohms |
| Frequency Range | 20 Hz – 20 kHz |
| THD | < 0.03% |
| SNR | ≥ 88 dB A-weighted |
| Audio channels | 2 |
| Digital Resolution | 16 bits x 48 kHz |
| Max receivers per transmitter | 4 |
| Latency | 36 ms |
| SKAA Pro mode (2 receivers, 18 ms) | Yes – Rx mode only |
Read User Manual Online (PDF format)
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