BLASTERS

⚠ (:toc:) <:vspace> <:vspace> [[<<]][[<<]] !SYSTEM A: SERIES 200 ENCODER/DECODER ---- <:vspace> Like above, the backup blaster system comprises two units, one on the recording site, the other on the shooting site: <:vspace> (:table border=1 cellpadding=3 cellspacing=0:) (:cellnr bgcolor=#eeeeee align=center:) '''Parameter''' (:cell bgcolor=#eeeeee align=center:) '''Recording site''' (:cell bgcolor=#eeeeee align=center:) '''Shooting site''' (:cellnr align=center:) Mfr.: (:cell:) Input/Output, Inc. (:cell:) Input/Output, Inc. (:cellnr align=center:) Mod.: (:cell:) Series 200 Seismic Source Synchronizer - Encoder (:cell:) Series 200 Seismic Source Synchronizer - Decoder (:cellnr align=center:) Power: (:cell:) 12 - 15 Vdc External (:cell:) 12 - 15 Vdv External (:cellnr align=center:) Current consumption @13 V dc: (:cell:) Idle: 0.53 A (RADIO/LINE, both LOCAL/REMOTE) Transmitting, low power: x A approx. Transmitting, high power x A approx. (:cell:) Idle: x A HV charging: x A average Transmitting, low power: x A Transmitting, high power: x A (:cellnr align=center:) Fuses: (:cell:) 32 mm, 3 A fast (:cell:) (:cellnr align=center:) Supports voice communication: (:cell:) Yes (:cell:) Yes (:cellnr align=center:) Radios: (:cell:) Yaesu, mod FT-2400H %newwin% [[http://www.radioamateur.eu/schemi/FT2400H_user.pdf | Link to manual]] (:cell:) Yaesu, mod FT-2400H %newwin% [[http://www.radioamateur.eu/schemi/FT2400H_user.pdf | Link to manual]] (:cellnr align=center:) Pictures, top view: (:cell:) [[Attach:enc200.png | Attach:enc200-small.png]] ''Mod 200 Encoder. Click to enlarge'' (:cell:) [[Attach:dec200.png | Attach:dec200-small.png]] ''Mod 200 Decoder. Click to enlarge'' (:cellnr align=center:) Connector pin-out (:cell align=left:) <:vspace> %red%'''SYSTEM'''%% <:vspace> Attach:14-12P.png ''SYSTEM connector 14-12P pin-out (note -> pin view; mirror for socket view)'' <:vspace> * PIN A: Clock TimeBreak (TB) to galvo and recording system * PIN B: Clock TB to galvo and recording system * PIN C: Clock TB (TTL logic) * PIN D: Uphole out * PIN E: Uphole out * PIN F: Confirmation TB * PIN G: Confirmation TB * PIN H: Logic GND * PIN J: Chassis * PIN K: Arm * PIN L: Fire * PIN M: [check ...] <:vspace> <:vspace> %red%'''RADIO'''%% <:vspace> Attach:12-10P.png ''RADIO connector 12-10P pin-out (note -> pin view; mirror for socket view)'' <:vspace> * PIN A: Radio transmitter input (HI) * PIN B: Radio transmitter input (LO) (A & B normally parallells microphone output) * PIN C: Radio receiver output (LO) * PIN D: Radio receiver output (HI) (C & D normally parallells speaker) * PIN E: Send / receive switch * PIN F: Send / receive switch * PIN G: Send / receive switch Relay contacts in encoder opens F and G and closes F and E during "ARM" and "SYNC CODE" transmissions. * PIN H: Chassis * PIN J: NC (Not connected) * PIN K: NC <:vspace> SHIELD: Separate shield lines A+B, C+D, E+F+G, to Radio Ground. Shield should be terminated at Microphone ground ONLY. <:vspace> <:vspace> %red%'''LINE'''%% <:vspace> Attach:8-3P.png ''LINE connector 8-3P pin-out (note -> pin view; mirror for socket view)'' <:vspace> * PIN A: To line * PIN B: Chassis * PIN C: To line B used for cable shield. When using shielded cable terminate shield at B only. Do not ground shield. <:vspace> <:vspace> %red%'''POWER'''%% <:vspace> Attach:8-2P.png ''POWER connector 8-2P pin-out (note -> pin view; mirror for socket view)'' <:vspace> * PIN A: 12 Vdc supply NEG * PIN B: 12 Vdc supply POS 2 Amp. <:vspace> <:vspace> (:cell align=left:) <:vspace> %red%'''LINE / RADIO'''%% Attach:12-10P.png ''LINE / RADIO connector 12-10P pin-out (note -> pin view; mirror for socket view)'' <:vspace> * PIN A: Radio receiver output (LO) * PIN B: Radio receiver output (HI) (normally parallells speaker) * PIN C: Chassis * PIN D: Radio transmitter input (HI) * PIN E: Radio transmitter input (LO) Use D & E for line operation instead of radio * PIN F: Send / receive switch * PIN G: Send / receive switch * PIN H: Send / receive switch Realy contact in Decoder opens F and H and closes F and G at Sync zero. * PIN J: Battery charger POS * PIN K: Battery charger NEG <:vspace> <:vspace> %red%'''UH PHONE'''%% Attach:8-3P.png ''UH PHONE connector 8-3P pin-out (note -> pin view; mirror for socket view)'' * PIN A: UH Phne * PIN B: Chassis * PIN C: UH Phone <:vspace> (:tableend:) <:vspace> <:vspace> <:vspace> [[<<]][[<<]] !SYSTEM B: SYNCRAPHONE ---- <:vspace> The primary blaster system comprises two units, one on the recording site, the other on the shooting site: <:vspace> (:table border=1 cellpadding=3 cellspacing=0:) (:cellnr bgcolor=#eeeeee align=center:) '''Parameter''' (:cell bgcolor=#eeeeee align=center:) '''Recording site''' (:cell bgcolor=#eeeeee align=center:) '''Shooting site''' (:cellnr align=center:) Mfr.: (:cell:) Input/Output, Inc. (:cell:) Input/Output, Inc. (:cellnr align=center:) Mod.: (:cell:) Synchraphone I (:cell:) Synchraphone II (:cellnr align=center:) Power: (:cell:) 12 - 15 Vdc External (:cell:) 12 - 15 Vdv Internal battery, 2 x 6 V, each 10 Ah Mfr.: Sonnenschein, mod: A506 10.0S, 6V, 10Ah Size W x D x H: 150 x 50 x 94 mm (height excluding power tabs) Charging details, see below (:cellnr align=center:) Current consumption @13 V dc: (:cell:) Idle: 0.92 A Transmitting, low power: 6 A approx. Transmitting, high power 6 A approx. (:cell:) Idle: 0.30A HV charging: 1.1 A average Transmitting, low power: 2.6 A Transmitting, high power: 5.4 A (:cellnr align=center:) Fuses: (:cell:) - (:cell:) - (:cellnr align=center:) Supports voice communication: (:cell:) Yes (:cell:) Yes (:cellnr align=center:) Radios: (:cell:) Yaesu, mod FT-212RH %newwin% [[http://www.radioamateur.eu/schemi/FT212RH_user.pdf | Link to manual]] (:cell:) Yaesu, mod FT-212RH %newwin% [[http://www.radioamateur.eu/schemi/FT212RH_user.pdf | Link to manual]] (:cellnr align=center:) Pictures, front view: (:cell:) [[Attach:synchraphone-1-front.png | Attach:synchraphone-1-front-small.png]] ''Synchraphone I. Click to enlarge'' (:cell:) [[Attach:synchraphone-2-front.png | Attach:synchraphone-2-front-small.png]] ''Synchraphone II. Click to enlarge'' (:cellnr align=center:) Pictures, rear view: (:cell:) [[Attach:synchraphone-1-rear.png | Attach:synchraphone-1-rear-small.png]] ''Synchraphone I rear view. Click to enlarge'' (:cell:) [[Attach:synchraphone-2-rear.png | Attach:synchraphone-2-rear-small.png]] ''Synchraphone II rear view. Click to enlarge'' (:cellnr align=center:) Pictures, external wiring interface: (:cell:) [[Attach:synchraphone-1-wiring.png | Attach:synchraphone-1-wiring-small.png]] ''Synchraphone I external interface wiring. Click to enlarge'' (:cell:) [[Attach:synchraphone-2-wiring.png | Attach:synchraphone-2-wiring-small.png]] ''Synchraphone II external interface wiring. Click to enlarge'' (:tableend:) <:vspace> <:vspace> <:vspace> <:vspace> <:vspace> <:vspace> <:vspace> <:vspace> !TESTING ---- Attach:compare-closure-cap-current.png"Blaster test" ''Blaster test'' <:vspace> * Upper (yellow) trace is Clock Timebreak, output from Master (unit on recording site). * Lower (blue) trace is secondary side of cap transformer - will indicate onset of cap current. * Time resolution: 1 ms/div. <:vspace> The oscilloscope is set in "Persist = Infinite" mode, which means that each recording will just be added to the display. If we trigger on Clock Timebreak any jitter between the trigger signal, and the Cap Current trace (lower), will be visible. We have made approx 10 recordings. The offset between Confirmation Timebreak and Cap Current signal is about 1.6 ms and fairly constant. So the blaster seems to be working fine. A constant offset with small jitter < 200 us is acceptable. <:vspace> <:vspace> !DETECTING CAP CURRENT ---- <:vspace> We follow a tip on page 21, section 5.3.R of the "I/O Technical Manual, Series 200, Seismic Source Synchronizer System, Installation and Maintenance": <:vspace> -> <pre class='escaped'>... A more convernient way, especially when the use of explosives is to be avoided, is to use an isolation transformer by winding ten feet of two-wire cap lead on a pencil. (The wiring length is not critical - build up layers about two inches long). One of the cap wires forms the transformer primary, the other wire forms the secondary. Connect the ends of one of the cap leads (same wire) to the DECODER cap terminals. Connect the ends of the other wire pair to a galvo. When the DECODER "FIRES", current will be induced in the galvo winding of the transformer thus causing a galvo deflection at "FIRE" time.</pre> <:vspace> <:vspace> <:vspace> Attach:trafo-no-diode.png"Isolation transformer to measure cap current" ''Isolation transformer to measure cap current.'' <:vspace> In the figure above, cap current runs in red and black leads in bottom right part of the picture. The isolation transformer, top, uses blue wires for the primary side, and yellow for the secondary side. The coax cable, lower left, is routed to the oscilloscope. <:vspace> In the following tests the cap wire is short-circuited; only the transformer is used. <:vspace> The cap current starts abruptly and then decreases gradually. The induced seconday voltage will reflect the rate of change in the current, so it will be large at the onset of the current. <:vspace>