DJITAAL FIELD UNIT (DFU)
Ngalaba Analojik (AFU)
Akwụkwọ ntuziaka USER

Mkpu.1-2021

Iji kpọtụrụ Sercel

Europe
Nantes, France
Ahịa; Nkwado ndị ahịa; Nrụpụta & Mmezi
BP 30439, 16 rue de Bel Air 44474 Carquefou Cedex
Tel: +33 2 40 30 11 81
Ahịrị ọkụ: Ala:+33 2 40 30 58 88
Mmiri:+33 2 40 30 59 59
Ntugharị: +33 2 40 30 69 87
Email: sales.nantes@sercel.com nkwado ndị ahịa. land@sercel.com nkwado ndị ahịa. marine@sercel.com customersupportnavigation@sercel.com repair.france@sercel.com streamer.repair@sercel.com

St Gaudens, France
Vibrator & VSP Nkwado ndị ahịa; Nrụpụta Vibrator & Mmezi Streamer Nrụpụta & Mmezi
Tel: +33 5 61 89 90 00, Fax: +33 5 61 89 90 33
Ahịrị ọkụ: (Vib) +33 5 61 89 90 91 (VSP) +33 5 61 89 91 00

Brest, France
Ahịa; Nkwado ndị ahịa
Tel: +33 2 98 05 29 05; Faksị: +33 2 98 05 52 41
Email: sales.nantes@sercel.com

Toulouse, France
Ahịa; Nkwado ndị ahịa
Tel: +33 5 61 34 80 74; Faksị: +33 5 61 34 80 66
Email: support@metrolog.com sales.@metrolog.com info@metrolog.com

Russia
Moscow, Russia
Nkwado ndị ahịa
Tel: +7 495 644 08 05, Fax: +7 495 644 08 04
Email: repair.cis@geomail.org support.cis@geo-mail.org
Surgut, Nkwado ndị ahịa Russia; Mmezi Tel: +7 3462 28 92 50

North America
Houston, Texas, Njikota Obodo Amerika
Ahịa; Nkwado ndị ahịa; Nrụpụta & Mmezi
Tel: +1 281 492 6688,
Ahịrị ọkụ: Kpọtụrụ Sercel Nantes Hotline
Email: sales.houston@sercel.com
HOU_Customer.Support@sercel.com
HOU_Ọzụzụ@sercel.com HOU_Customer.Repair@sercet.com
Tulsa, Oklahoma, USA Tel: +1 918 834 9600, Fax: +1 918 838 8846
Email: support@sercelgrc.com sales@sercel-grc.com

Etiti ọwụwa anyanwụ
Dubai, UAE
Ahịa; Nkwado ndị ahịa; Mmezi
Tel: +971 4 8832142, Fax: +971 4 8832143
Ahịrị na-ekpo ọkụ: +971 50 6451752
Email: dubai@sercel.com repair.dubai@sercel.com

Far East
Beijing, PR nke China
Nyocha & Mmepe Tel: +86 106 43 76 710,
Email: support.china@geo-mail.com repair.china@geo-mail.com
Email: customersupport.vib@sercel.com customersupport.vsp@sercel.com Xuhui, PR nke China
Nrụpụta & Mmezi
Tel: +86 312 8648355, Fax: +86 312 8648441
Singapore
Nrụpụta Streamer; Ndozi; Nkwado ndị ahịa
Tel: +65 6 417 7000, Fax: +65 6 545 1418

Ntuziaka maka Ojiji dị mma na nke ọma

Gụọ ozi a tupu i jiri AFU, DFU gị.
Ịdọ aka ná ntị, ịdọ aka ná ntị, na ọkwa dị mkpa n'ime akwụkwọ ntuziaka a na-eduzi gị ka ịzenarị mmerụ ahụ, gbochie mmebi akụrụngwa, ma chọpụta ojiji akụrụngwa mgbe ihe dị iche iche ma ọ bụ nhazi dị. Ihe ndetu na-enye ndụmọdụ ma ọ bụ ozi agbakwunyere. Ọ bụghị SERCEL na-ahụ maka mmebi ma ọ bụ mmerụ ahụ sitere na edebeghị ozi enyere.

Ịdọ aka ná ntị
Mgbe ịdọ aka ná ntị ma ọ bụ ịkpachara anya pụtara na akara ngosi ọkụ ọkụ, dịka egosiri na example, nke a bụ igosi ihe egwu nwere ike ibute mmerụ ahụ ma ọ bụ ọbụna ọnwụ.

kpachara anya
Mgbe ịdọ aka ná ntị ma ọ bụ ịkpachara anya pụtara na akara ngosi mkpu, dị ka egosiri na example, nke a bụ igosi mmebi akụrụngwa nwere ike imebi ma ọ bụ ihe egwu nwere ike iji n'ụzọ na-ezighi ezi na arụ ọrụ ezighi ezi.

IHE dị mkpa
Ọkwa ndị dị mkpa na-apụta na akwụkwọ ntuziaka iji gosi ozi na-adịghị emetụta ihe ize ndụ nke mmerụ ahụ, ọnwụ, ma ọ bụ mmebi akụrụngwa, mana ọ dị mkpa. Ọkwa ndị a pụtara na akara ngosi nkwụsị, dịka egosiri na example.

Nkọwa

DFU – Digital Field Unit
DFU bụ Ngalaba Ubi Dijitalụ nke sistemụ WiNG (ntụgharị. 10043828). Ọ bụ otu ngalaba ngalaba kwụụrụ onwe ya gụnyere QuietSeis MEMS Sensor. Ọ na-agụnye ike nkwurịta okwu ikuku iji wepụta ọkwa QC ya na nnweta samples.
Ọrụ DFU
Ndekọ osooso ala Nzacha, mkpakọ na oge stampMwepu nke data edekọtara na rack nnyefe nchekwa data mpaghara na arịrịọ Ngwa na nyocha sensọ A na-ahọrọ nzacha mbelata dị ala ruo 0.15Hz
AFU - Ngalaba Ubi Analogue
AFU bụ ngalaba Analogue Field nke sistemu WING (ref. 10042274). Ọ bụ otu ọnụ ụzọ kwụụrụ onwe ya gụnyere njikọ KCK2 mpụga maka geophone. Ọ gụnyere ikike nzikọrịta ozi iji wepụta ọkwa QC ya na ikuku ikuku.
Ọrụ AFU
24 bit A/D ntụgharị nke mgbaama Nzacha, mkpakọ na oge stampntinye data nchekwa data mpaghara yana mbufe ma ọ bụrụ na achọrọ Ngwa na nnwale sensọ Họrọ obere mbelata nzacha ruo 0.15Hz
Igwe ọkụ magnetik (ref. 10045283) na-eme ka ike ON & Gbanyụọ mpaghara mpaghara dabere na mmetụta Ụlọ Nzukọ.

* Rụtụ aka na isiakwụkwọ "Owuwe ihe ubi na ịchaji batrị".

Nkọwa nke protocol redio

2,4GHz RADIO transceiVER

Igwe redio abụọ
MAC na-ejikwa redio 2 nọọrọ onwe ya nwere usoro data dị iche yana mgbanwe redio dị iche iche (LORA na GFSK). Naanị otu n'ime ha nwere ike iji na-enweghị mmekọrịta GNSS (redio a kwesịrị iji maka redio nchọpụta nsogbu). A na-eji LORA na-ekwurịta okwu n'etiti DFU site na FHSS (Frequency Hopping spread Spectrum) teknụzụ ma na-ebufe ọnọdụ ahụike na ntọala. A na-eji GFSK na-ekwurịta okwu na akụrụngwa mpụga (igbe WiNG Field Monitor) site na teknụzụ FHSS iji zipu data steeti ahụike nke ọtụtụ DFU, ụfọdụ data seismic nke ya ma ọ bụ nweta ntọala.

Ịkekọrịta oge na redio abụọ na 1 sekọnd.

Oke ugboro na oghere ọwa
Ugboro ugboro nke akụrụngwa kpuchie bụ 2402.5MHz ruo 2478.5MHz, na-eji oghere ọwa 1MHz. Dịka iwu FCC siri dị, a na-eji atụmatụ FHSS (Frequency Hopping Spread Spectrum) mee ihe, na ugboro iri abụọ dị iche iche.

Ọnụego data
Ọnụego data bụ 22.2Kbps nwere mgbanwe LORA yana 1Mbps nwere modulation GFSK.

FHSS
FHSS na-arụ ọrụ n'ọtụtụ ugboro. Ọ na-eji otu ugboro maka oge a kapịrị ọnụ wee gbanwee na ọwa ọzọ. A na-enye ugboro na-esote site na usoro pseudo-random. Ka anyị wee na-ekwurịta okwu, onye na-ebufe na onye nnata nwere anyị otu usoro ugboro ugboro, otu usoro ugboro ugboro nke igodo Frequency kọwara. A na-emekọrịta ihe na-ebufe na nnata oge maka modul nnabata GNSS nke nyefere akara PPS na microcontroller. Ya mere, ma transmitter na nnata na-agbanwe ugboro ha n'otu oge.

Example nke FHSS dabere na usoro nke 6.

Gee ntị tupu okwu (LBT) wee laghachi azụ
LBT gbadoro ụkwụ na usoro nnweta njikwa ọwa. Redio DFU na-atụ ihe ngosi ike mgbama enwetara (RSSI) tupu ịmalite nnyefe ngwugwu. Ọ bụrụ na RSSI dị oke elu, a na-ekwu mgbasa ozi "na-arụsi ọrụ ike" na DFU na-eyigharị nnyefe maka oge azụ azụ.

Nhazi GPS

Ndepụta nke kpakpando GNSS anabatara (QZSS, GALILEO, BEIDOU, GLONASS, GPS)

• Naanị GPS bụ ọnọdụ ndabara
• GPS naanị + SBAS
• GLONASS naanị
• GPS+GLONASS+SBAS
• GPS+GLONASS+GALILEO
• GPS+GALILEO

Ụdị nsoroụzọ

• Ọdụdọ (ụkpụrụ izizi)
• Onye ji ụkwụ aga

Nkwanye

AFU - Ngalaba Ubi Analogue
Tupu ijikọ eriri geophone na AFU, ọ dị mkpa ka etinyere geophones nke ọma n'ọnọdụ ha na nghazi. Maka AFU, njikọ kwesịrị ibu ụzọ gbakwasa ya nke ọma, wee gbanye ya ozugbo wee pịa ya nke ọma na oghere. Ọ bụrụ na mkpọchi dị na njikọ eriri geophone, ekwesịrị iji naanị aka mechie ya.

DFU – Digital Field Unit
A ghaghị ịkụnye DFU n'ime ala na ntọala nke ọkwa mpaghara na ala. Enwere ike lie DFU - ọ dịghị omimi karịa TOP nke ngalaba ubi. Agbanyeghị, nke a ga-ebelata arụmọrụ GPS.

Kwado Ngalaba Ubi
A na-akwado Ngalaba Ubi ahụ site na batrị dị n'ime ya, yana ekwesịrị ịhụ na batrị chajịrị ya nke ọma tupu ebunye ya. A na-eme ka ọkụ dị n'ime nke Ngalaba Ubi nwee ike iji osisi ọkụ.

Mgbe Ngalaba Ubi gbanyere ọkụ, ọ ga-abanye n'usoro buut ike, nke kwesịrị iwe ihe dị ka nkeji 1 iji wuchaa. Egosiputa usoro buut site na Operation LED na-egbu maramara ngwa ngwa, nke a kwesịrị iwe ihe dịka nkeji 1 iji wuchaa. Mgbe edemede, ngalaba ahụ ga-eme ule nke eriri geophone, gụnyere ule tilt iji hụ na a kụrụ geophones (maka AFU) nke ọma, ya mere ọ dị mkpa na geophones adịghị enwe nsogbu n'oge a, na nke dị ntakịrị. A na-eme mkpọtụ ala dịka o kwere mee.
Egosiputa mmecha nke buut na oge ule site na Operation LED na-agbanwe ọnụego gaa 1 blink kwa sekọnd. Nke a na-egosi na ọ nweghị mmejọ ahụrụ n'oge ule buut.

N'ihe banyere nsogbu achọpụtara n'oge mmalite, LED ga-amụba 2 ugboro kwa nkeji. Ọ bụrụ na achọpụtara mmejọ, ekwesịrị inyocha geophones na ihe ọkụkụ ha.
Ozugbo AFU / DFU na-enweta, LED ga-atụgharị 1 oge kwa 4 sekọnd.
Ka onye na-anata GPS integral nata akara kacha mma enwere ike, AFU/DFU kwesịrị idobe ya n'ala kwụ ọtọ, yana n'ebe dị anya dịka o kwere mee site na ihe ndị nwere ike igbochi ndị nnata. view nke elu igwe, dị ka osisi ma ọ bụ ụlọ.
Ozugbo AFU/DFU nwetara mkpọchi GPS, ọ ga-amalite ozugbo inweta data. Ewezuga nke a ga-abụ ma ọ bụrụ na ahaziri oge ọrụ nke na AFU/DFU ga-anọkarị n'ọnọdụ ụra n'oge ebuga ya. Tebụl dị n'okpuru na-enye nkọwa zuru oke nke ụkpụrụ AFU/DFU LED.

Omume AFU / DFU	Ụkpụrụ LED
Ngalaba ubi ga-agbanyụ	blinks maka 3 sk tupu emechie
Na-eche nnweta	1 blink/sk
Nnweta na-aga n'ihu	1 blink / 4 sk
Ọdịda nnweta n'ihi nnukwu mperi	blink abụọ / 2 sk na-aga n'ihu
Rack ejikọrọ	Ikanam ON
STORAGE steeti	1 blink siri ike / 500 ms

Na-ewe ihe ubi & Ịchaji batrị

Ngwa owuwe ihe ubi na chaja na-enye interface iji chaja, melite,
Nchọpụta nsogbu yana data owuwe ihe ubi sitere na nkeji mpaghara
Chaja & owuwe ihe ubi na-arụ ọtụtụ ọrụ. Ọ na-enye ohere:

• Owuwe ihe ubi data n'otu oge na chaja batrị nke ngalaba ubi
• Nhazi na Nnwale nke ngalaba ubi
• Na-egosipụta ihe njikwa ngosi na-egosi ọkwa nke ngalaba ubi ọ bụla
• 36 oghere kwa rack
• Ejikwa ya na DCM
• Ụdị kwụụrụ onwe ya na arụrụ ọrụ belatara

WING CHARGER & HARVESTING RACK njikọ

Njikọ interface maka:

Jikọọ mpaghara mpaghara na Rack. Ikanam dị na Ngalaba Ubi ga-anọgide na-enwu. Hụ akwụkwọ ntuziaka nwụnye WiNG, ngalaba na-edozi nkeji Ubi na Rack
Ngosipụta eserese nke owuwe ihe ubi na chaja (ngwa) na-enye eserese view nke Field nkeji ọnọdụ. Ngwa a na-enye gị ohere ịchaji, melite, nchọpụta nsogbu, na data owuwe ihe ubi sitere na Ngalaba Ubi.

Tebụlụ dị n'okpuru na-egosi akụkọ ifo maka akara ngosi owuwe ihe ubi na chaja

Akara ngosi	Nkọwa
	Na-egosi batrị OK. Owuwe ihe ubi OK.
	Na-egosi na owuwe ihe ubi na-aga n'ihu.  Achajila batrị zuru oke (ọkwa batrị 100%)
	Batrị na-agbaji (ọkwa batrị karịrị 30% mana chaja chachabeghị).
	Ọkwa batrị dị ala (0-30%)
	Na-egosi ụgwọ otu mpaghara agaghị ekwe omume n'ihi oke okpomọkụ/obere okpomọkụ.
	Agbanyere ọnọdụ nchekwa ma nkeji adịla njikere iwepụ.

Nlekọta

IHE dị mkpa
Iji hichaa plọg ntinye ike mpaghara, jiri naanị mmiri dị ọhụrụ. Ejila kemịkalụ ọ bụla na-akpa ike (dị ka mmanụ ụgbọala ma ọ bụ mmanụ ụgbọala) nwere ike ibuso rọba ọgụ. Tupu ijikọ plọg ọ bụla, gbaa mbọ hụ na enweghị mmiri n'ime njikọ.

Mwepu electrostatic:
Jiri ntuziaka ndị a iji nye ọdụ nrụzi na-akwụghị ụgwọ nke ga-egbochi mmebi sekit eletrọnịkị ọ bụla metụtara ESD:

• Ekwesịrị ịchekwa ma bufee akụkụ ahụ mapụtara (boọdụ okirikiri na ngwaọrụ ESD) n'ime akpa mkpuchi static.
• Ọ gwụla ma ebe a na-arụzi ihe ahụ adabara n'ala a na-eduzi, oche ma ọ bụ stool kwesịrị ịdị n'elu akwa ala, nke siri ike, nke na-adịghị agbanwe agbanwe.
• Jiri ute tebụl static-dissypative.
• Yiri eriri nkwojiaka na-achịkwa static ma ọ bụ ala ụkwụ.
• Wepụta ntọ ala nkịtị maka ihe niile na-eduzi (gụnyere ndị ọrụ na nrịbama ígwè).
• Iji chịkwaa ọnụego mwepụta na ichekwa ndị ọrụ site na mgbanaka ọkụ eletrik, ma tebụl tebụl na eriri nkwojiaka kwesịrị ịgbakwasị ụkwụ site na ihe mgbochi 1-M. Ekwesịrị ijikọ ute ahụ n'otu ebe ala ụwa dị ka eriri nkwojiaka.
• Yiri uwe na-emebi emebi.

Batrị

kpachara anya

Jiri naanị ụdị batrị Sercel nyere: WING FIELD UNIT PACK BATERY 50WH, ref. 10042109

Ịkpachara anya: ihe egwu nke mgbawa ma ọ bụrụ na ejiri ụdị na-ezighi ezi dochie batrị.
Etinyela batrị n'ime ọkụ ma ọ bụ oven dị ọkụ. Egwepịala ma ọ bụ bepụ batrị n'ihi na nke a nwere ike ịkpata mgbawa.

1. Jiri mkpisi Ike mechie nkeji Ubi.
2. Mechie 4 SCREWS DELTA PT 40 × 16 na mkpuchi (ụdị isi: TORX T20).
   
3. Ewepụla njikọ batrị na bọọdụ eletrọnịkị.
   
4. Wepụ batrị.
5. Tinye batrị ọhụrụ n'ime ihe na-akpata ujo abụọ.
   
6. Tinye ngwungwu batrị n'ebe, lekọta nhazi nke akụkụ abụọ ahụ.
   
7. Jikọọ njikọ batrị na bọọdụ eletrọnịkị.
8. Mechie Ngalaba Ubi site na iji HAND CLAMP iji pịa akụkụ abụọ ahụ ọnụ, ma mee ka 4 SCREWS DELTA PT 40 × 16 sie ike (ụdị isi isi: TORX T20; torque 2,1Nm).
   

kpachara anya
Atụpụla batrị ngwaahịa Sercel n'ime ahịhịa.

Ngwaahịa a nwere batrị emechiri emechi ma a ga-atụfu ya nke ọma. Maka ozi ọzọ, kpọtụrụ ebe a na-emegharị ihe / imegharị ma ọ bụ ebe mkpofu dị ize ndụ.

Nkọwapụta

	AFU - Ngalaba Ubi Analogue	DFU- Digital Field Unit
Nrụ ọrụ Voltage	3,6V
Nnwere onwe batrị	> awa 960 (ụbọchị 40 24hr/7day) agbanyere onye ụzọ > awa 1200 (ụbọchị 50 24hr/7day) Pathfinder nwere nkwarụ
Akụkụ (HxWxD):	231mm x 112mm x 137mm	231mm x 112mm x 118mm
Ibu	760g	780g (enweghị ọnyà), 830g (ya na spike)
Environment na-arụ ọrụ	IP68
Okpomọkụ arụ ọrụ	-40°C ruo +60°C
Okpomọkụ nchekwa	-40°C ruo +60°C
Okpomọkụ chajị batrị	0°C ruo +30°C
ogo mmetọ	II
Altitude na-arụ ọrụ	<2000m
Ọnụego data redio	LORA: 22kbps na GFSK: 1Mbps
Njirimara ugboro redio: igwe ugboro Usoro ịgbasa Ọnụọgụ nke ọwa	2402 - 2478 MHz LORA/GFSK FHSS 3×20
Ike mmepụta radieshon	14mBm
Ndị kpakpando GNSS akwadoro	GPS, GLONASS

Ozi nchịkwa

Nkwupụta European Union

Ngwaahịa Sercel na-emezu ihe achọrọ dị mkpa nke ntuziaka

• RED 2014/53/UE (Redio)
• 2014/30/UE (EMC)
• 2014/35/UE (Obere Voltage)
• 2011/65/UE (ROHS).

IHE dị mkpa
WiNG DFU & AFU bụ ngwaọrụ klas-A. N'ebe obibi, enwere ike ịrịọ onye ọrụ ka o mee ihe kwesịrị ekwesị ma ọ bụrụ na ndabichi RF nke ngwaọrụ a kpatara.

Nkwupụta nke FCC US
Mgbanwe ma ọ bụ mgbanwe ndị otu na-ahụ maka nnabata na-akwadoghị nke ọma nwere ike imebi ikike onye ọrụ iji rụọ ngwa ahụ.
Ngwaọrụ a na-akwado akụkụ 15 nke Iwu FCC. A na-arụ ọrụ n'okpuru ọnọdụ abụọ a:

1. Ngwaọrụ a nwere ike ọ gaghị ebute nnyonye anya na-emerụ ahụ, yana
2. Ngwaọrụ a ga-anabatarịrị nnyonye anya ọ bụla enwetara, gụnyere nnyonye anya nwere ike ibute ọrụ na-achọghị

Mara: A nwalere ngwa a wee hụ na ọ dabara na oke maka ngwaọrụ dijitalụ klaasị A, dịka akụkụ 15 nke Iwu FCC. Emebere oke ndị a iji nye nchebe ezi uche dị na ya pụọ ​​​​na nnyonye anya na-emerụ emerụ mgbe ejiri akụrụngwa na mpaghara azụmahịa. Akụrụngwa a na-ewepụta, na-eji, ma nwee ike ịgbasa ike ugboro redio yana, ọ bụrụ na etinyeghị ya ma jiri ya dịka ntuziaka ntuziaka siri dị, nwere ike ibute ndabichi na-emerụ ahụ na nkwukọrịta redio. Ịrụ ngwá ọrụ a n'ime ebe obibi nwere ike ịkpata nnyonye anya na-emerụ ahụ ma ọ bụrụ na a ga-achọ ka onye ọrụ dozie nnyonye anya n'onwe ya.
Akụrụngwa a na-akwado oke ikpughe radieshon nke FCC ewepụtara maka gburugburu anaghị achịkwa n'okpuru ọnọdụ ndị a:

1. Ekwesịrị ịwụnye akụrụngwa a ma rụọ ọrụ nke na a na-edobe anya nkewa kacha nta nke 20cm n'etiti radiator (antenna) na ahụ onye ọrụ / dị nso mgbe niile.
2. Agaghị ejikọta ihe nnyefe a ma ọ bụ na-arụ ọrụ na njikọ antenna ma ọ bụ nnyefe ọ bụla ọzọ.

Nkwupụta IC Canada
Ngwaahịa SERCEL na-akwado ụlọ ọrụ Canada EMI Class A chọrọ dị ka ICES-003 na RSS Gen. Les produits SERCEL sont conformes aux exigences Classe A de l'Industrie Canada selon les normes NMB-003 et CNR Gen.

Rịba ama Ngwa ndị a na-akwado RSSs enweghị ikike nke Industry Canada. A na-arụ ọrụ n'okpuru ọnọdụ abụọ a:

1. Ngwaọrụ ndị a nwere ike ọ gaghị eme ka nnyonye anya; na
2. Ngwaọrụ ndị a ga-anabatarịrị nnyonye anya ọ bụla, gụnyere nnyonye anya nwere ike bute ọrụ ngwaọrụ ahụ achọghị.

Akụrụngwa a na-akwado oke mkpughe radieshon RSS102 ewepụtara maka gburugburu anaghị achịkwa n'okpuru ọnọdụ ndị a:

1. Ekwesịrị ịwụnye akụrụngwa a ma rụọ ọrụ nke na a na-edobe anya nkewa kacha nta nke 20cm n'etiti radiator (antenna) na ahụ onye ọrụ / dị nso mgbe niile.
2. Agaghị ejikọta ihe nnyefe a ma ọ bụ na-arụ ọrụ na njikọ antenna ma ọ bụ nnyefe ọ bụla ọzọ.

Akwụkwọ / akụrụngwa

Ngalaba Ubi Dijitalụ Sercel DFU, Ngalaba Ubi Analogic AFU [pdf] Akwụkwọ ntuziaka onye ọrụ 0801A, KQ9-0801A, KQ90801A, Digital Field Unit DFU Analogic Field Unit AFU, Digital Field Unit, DFU, Analogic Field Unit, AFU

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