Seismic Source BOOM BOX 3 User Manual

User’s Manual
26
7.2 Fire Sequence – A3 Repeater Encoder – Following sequence occurs.
• The fire sequence can be started multiple ways.
o A hardware pulse (Isolated Remote Start) from an external source. Recording
System type is Generic Serial. Currently all unit IDs will be enabled to fire, not
changed by the RTI sequence message.
o Recording System type is SourceLink. SourceLink can fire the Boom Box 3 A3
Repeater Encoder.
o Recording System type is Sercel. Place the Sercel recording system in SGDS
dynamite mode. The Sercel recording system can now send the RTI message that
tells the Boom Box 3 in A3 Repeater Encoder mode which unit to fire. The same
message will cause the Boom Box 3 to send the radio repeater start code.
• A3 Repeater Encoder transmits the A3 Repeater Start Code to start the A3 Repeater Unit.
(Timing of transmission is determined by Encoder Start Delay and Encoder Radio Start
Delay time)
• A3 Repeater Encoder issues a Time Break at the end of the Encoder Start Delay time.
• After the Shot is fired the A3 Repeater Encoder receives the Shot Status Report message
from the Decoder (if in radio range) and the Repeater Unit. The time when the message is
received determines when the timing pulses will occur.
• The A3 Repeater Encoder display will show ‘PFS Rx !!’ when the decoder post report is
received.
• The A3 Repeater Encoder generates reference pulses at 1, 1.5, 2, 2.5, 3, and 3.5 seconds.
These pulses should align with the timing pulses generated from the Decoder’s Shot Status
Report.
• The A3 Repeater Encoder will output the following timing pulses. These pulses are based
on when the Shot Status Message is received from the Decoder (if in radio range).
o Data reception pulse – Pulse that is generated if Shot Status Message is received.
This pulse should be at 1 second after time break plus one-way radio delay.
o Confirmation Time Break – This pulse will be generated if current to CAP
exceeded threshold. This pulse is generated 0.5 seconds after Data Reception
Pulse.
o Uphole Data – The analog uphole data is reproduced exactly 1 second after the
Data Reception Pulse.
• The A3 Repeater Encoder will output the following timing pulses. These pulses are based
on when the Shot Status Message is received from the repeater Decoder.
o Data reception pulse 2 – Pulse that is generated if Shot Status Message is received.
This pulse should be at 2.5 seconds after time break plus one-way radio delay.
o Confirmation Time Break 2 – This pulse will be generated if current to CAP
exceeded threshold. This pulse is generated 0.5 seconds after Data Reception
Pulse 2.
o Uphole Data 2 – The analog uphole data is reproduced exactly 1 second after the
Data Reception Pulse 2.
• The SourceLink program is used to view the following:
o The Shot Status message from the Decoder.
o Shot Status Message download.
o GPS information before or after the shot.
o View Resistance measurements before or after the shot.

Seismic Source BOOM BOX 3 Specifications

General

Brand	Seismic Source
Model	BOOM BOX 3
Category	Controller
Language	English