GPS Baud Rate
The BB3 is set to use GPS receivers set at 19.2 K baud rate
The older boom box is set to use GPS receivers set at 9600 baud rate.
Geophone Test
The BB3 includes detailed geophone tests. These tests assure that the uphole geophone is planted
correctly and is operational. The Geophone tests the following parameters:
• Resistance – measures DC resistance – Geophone must be connected.
• Frequency – geophone must be planted in vertical position for frequency to pass.
• Damping - geophone must be planted in vertical position for damping to pass.
• Sensitivity -geophone must be planted in vertical position for sensitivity to pass.
The older Boom Box unit only tested the Geophone resistance.
Radio Telemetry
The BB3 uses a new radio telemetry interface. This new interface is designed to provide a robust
and reliable connection to most VHF and UHF radios. The BB3 uses the same radio telemetry
design as the Force 3 vibrator electronics.
When the BB3 is set to maximum radio modulation level, the radio interface requires a similar
interface as the older Boom Box units. The same “Radio Pigtails” should work for both the BB3
and the Boom Box unit.
The BB3 may require different radio polarity than the older Boom Box units. The Microphone and
Speaker polarity should be tested for optimum operation.
When different radios or different radio polarities are used with the BB3 units, there may be a start
time difference between the BB3 and the older Boom Box units. The “Decoder Delay” entry of the
Boom Box 3 can be used to match the start times of the older Boom Box units.
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