C-Fax Model 2 User Handbook
Contents
1. 45MHz amp 455kHz 453 1 kHz 2 microvolts for useable copy Front panel contrast control 322mm wide x 250mm high x 95mm deep Approx 4kg Vertical or horizontal free standing or on bracket supplied 12 to 24V DC 12W when printing 230V AC to 12V DC Power Supply All effort will be made to supply the equipment as per the specifications however we reserve the right to change any of the above details without notice 16 Wiring Connections Power Supplied via a 4 pin round line socket standard threaded locking collar Side Panel Power pin pin pin pin RS W NO RR Power supply 12 to 24V DC at 1 5A 12W maximum Audio In unused negative black positive red unused Standard 3 5mm mono audio plug for external receiver Center is signal outside is signal return Level 100mV to 3V RMS 17 BHM C FAX 250297 Channel 001 ANTARCT 7470 002 ANTARC 11455 003 NZ 5807 004 NZ 9459 005 NZ 13550 5 006 NZ 16340 1 007 AUS MLB 2628 008 AUS MLB 5100 009 AUS ML 11030 010 AUS ML 13920 011 AUS ML 20469 012 AUS DRW 5755 013 AUS DRW 7535 014 AUS DW 10555 015 AUS DW 15615 016 AUS Dw 18060 017 GUAM 5258 018 GUAM 5262 019 GUAM 10253 020 GUAM 10257 021 GUAM 16027 6 022 GUAM 19858 023 GUAM 19862 024 GUAM 23010 025 TAIWAN 4616 026 TAIWAN 5250 027 TAIWAN 8140 028 TAIWAN 13900 029 KOREA 5857 5 030 KOREA 7433 5 031 HK 16904 3 032 SHANGHI 74202. 033 SHANGH 11420 034 SHANGH 18940 035 JAPAN 3365 036 JAPAN 5405 037 JAPAN 9438 038 JAPN 14692 5 039 JAPN 18441 2 040 JAPAN 3622 5 041 JAPAN 7305 042 JAPAN 9970 043 JAPAN 13597 044 JAPAN 18220 Frequency list for the C Fax Frequency list updated 25 February 1997 Country Location Antarctic Casey New Zealand Auckland Australia Melbourne AXM Australia Darwin AXI Guam USN Apra Harbour Taiwan Tai pei South Korea Soul Hong Kong Victoria Harbour China Shanghai Japan Tokyo 1 Japan Tokyo 2 18 Standards LPM IOC 120 576 120 576 120 576 120 576 120 576 120 576 120 576 120 576 O Ch Ch Ch Ch Ch Ch Ch Ch 00000000 00000000 02000020 00000000 Oo O Ch 00000 000000 45 46 47 48 49 50 51 JAPN 23522 9 KHBRV 4516 7 KHBRVSK 7475 KHBRVSK 9230 KHBRVS 14610 KHBRVS 14737 KHBRVS 19275 52 53 54 55 56 S 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 ALASKAK 4298 ALASKAK 8459 ALASKAA 8494 ONOL 9982 5 ONOLU 11090 ONOLU 16135 ONO 23331 5 AWAIT P 4855 AWAI P 9398 HAWAIP 21785 CANADAT 3253 CANADAI 7710 US OMAH 3232 US OMAH 4857 11122 4346 8682 12730 H H H H H H ARGENTI 5185 73 74 75 76 77 78 79 80 81 82 83 84 85 86 88 89 90 91 92 93 95 96 97 98 ARGENT 1 ARGN 18621 5 ARGENTE 5185 ARGENT 10720 ARGN 18621 5 US NRFK 3357 US NRFK 8080 US NRF 10
3. 110 W Equator to 50 S 140 E to 140 W New Zealand South Pacific Australia to South America South West Pacific Australia to Tahiti Tasman Sea and New Zealand Analysis Forecast Significant Marine Weather Nephanalysis analysis of cloud information taken from satellite pictures Prognosis Significant Aviation Weather Temperatures Mean Sea Level Height of 700 millibar pressure level 10000 feet Height of 500 millibar pressure level 18400 feet Height of 250 millibar pressure level 34000 feet Greenwich Mean Time Coordinated Universal Time Number is number of hours ahead for forecast 10 Detailed Description of the Controls Numbers in brackets refer to the picture on page 6 Audio On Align switch 3 and Align light 4 When this switch is placed in the up position then audio from the receiver can be heard This can be used to listen to the quality of the radio reception on any of the channels Placing the switch back in the center position turns off the sound If a map printout is started manually or if the synchronising signal at the beginning of a transmission is missed the picture may be out of alignment This shows up as a picture starting part way along the paper instead of at the left side To manually align a picture Look at the picture being printed Find the normal left hand edge of the picture Note where this is on the 0 7 scale on the front panel Hold down the align switch 3 Count the number of fl
4. 30 seconds Following this is the actual picture which is two tones alternating randomly The picture generally takes about 15 minutes to send Finally the stop signal is sent This is 5 seconds of alternating tones followed by 10 seconds of a steady tone You may turn off the audio by putting the Audio switch 3 back to the middle position It is only required for determining the signal quality of a channel While the C Fax is left on Automatic it will start and stop printing whenever a picture is received You will generally not need to do anything else If for some reason the C Fax misses the stop signal for example if the radio signal becomes very noisy or fades it will continue to print even after the picture has finished A built in timer will automatically stop the C Fax printing after about 40 minutes if it hasn t had a stop signal minimising paper wastage Useful Hints If you switch on the C Fax and the start tone has passed and a picture is being printed switch the Stop Auto Start switch down to start the printer then back to Auto Let it print for about 10 seconds then fast feed the paper out a little to see where the edge of the picture is positioned Manual alignment can now be carried out as described on page 11 If the printer is started after the start tone but during the phasing pulse period during the first 10 seconds or so it will automatically align the picture Before tearing off the paper fast feed out about 5c
5. 77 TURKEY 6790 EGYPT 4524 5 EGYP 10121 1 ds ds GA GO 0 00 WW WW WwW WwW CO vO OD JO OS GOb t O KENYA 9045 KENYA 16187 KNYA 17445 5 UK BR 2618 5 UK BRAC 4610 UK BRAC 8040 UK BRC 14436 UK BRC 18261 GRMNY H 3855 GRMNY H 7880 GRMH 13882 5 GEORGIA 3745 GEORGIA 7495 BRR RHE DP A 00 JO OG UNE OT gt Oo 151 152 DENMARK 5850 DENMARK 9360 DENMRK 13855 DENMRK 17510 MOSCOW 53 6 MOSCOW 144 5 MOSCOW 2815 MOSCOW 3395 MOSCOW 3875 MOSCOW 4550 Germany Hamburg Germany Grengel Germany Offenbach Denmark Copenhagen Czech Republic Prague Spain Madrid Spain USN Rota Senegal Dakar Italy Rome Greece Athens Turkey Ankara Egypt Cairo Kenya Nairobi United Kingdom Bracknell Germany Hamburg Georgia Tbilisi Denmark Copenhagen Russia Moscow 60 576 20 N N N N 0 576 0 576 0 576 0 576 120 576 120 576 120 576 60 576 120 576 120 576 120 576 90 576 120 576 120 576 120 576 60 288 60 576 90 576 120 576 90 288 1 90 576 I 120 288 120 576 153 MOSCOW 4560 154 MOSCOW 5150 155 MOSCOW 5355 156 MOSCOW 6880 157 MOSCOW 7670 158 MOSCOW 7750 159 MOSCOW 10230 160 MOSCOW 10980 161 MOSCOW 11525 162 MOSCOW 12165 163 MOSCOW 13470 164 MOSC
6. 865 US NRF 15959 US NRF 20015 BOSTON 3264 BOSTN 6340 5 BOSTON 7530 BOSTON 9110 BOSTON 12750 CANA H 122 5 CANADAH 4271 CAN H 6496 4 CANA H 10536 CANA H 13510 ICELD 3820 5 ICELAND 9318 ICELND 18486 UK BR 2618 5 UK BRAC 4610 UK BRAC 8040 Russia Khabarovsk 120 288 60 3167 90 5 76y1 20 576 Alaska USCG Kodiak Hawaii Honolulu Hawaii USN Pearl Harbour Canada CCG Iqaluit United States USAF Omaha 120 976 120 576 120 576 120 576 United States USCG San Francisco 120 576 Argentina Buenos Aires United States USN Norfolk United States USCG Boston Canada CF Halifax Iceland USN Keflavik United Kingdom Bracknell 19 120 576 120 576 120 576 120 576 120 576 120 576 H F H F H F H F H F 0OD 0 00 00 0 0 00 0 UK BRC 14436 UK BRC 18261 GRMNY H 3855 GRMNY H 7880 GRMH 13882 5 GRM G 2342 5 GRMNY G 3302 GRM G 4570 5 GRMN O 117 4 GRMN O 134 2 DENMARK 5850 DENMARK 9360 DENMRK 13855 DENMRK 17510 CZECH 111 8 00 JO UG GOAb t OO OO JODA GOb OW N o SPAIN 6918 5 SPAIN 10250 SPAIN R 4623 SPN R 5864 5 SPAIN R 9373 SPAN R 11485 SENEGL 13666 y ya N SENEGL 19751 ITALY 4777 5 NO N WN ITALY 8146 6 N HS ITLY 13597 4 NN NNN Oo MIRO GREECE 8530 TURKEY 33
7. A 18238 225 KENYA 9095 226 KENYA 16187 227 KNYA 17445 5 228 EGYPT 4524 5 229 EGYP 10121 1 230 TURKEY 3377 231 TURKEY 6790 232 GREECE 8530 233 ITALY 4777 5 234 ITALY 8146 6 235 ITLY 13597 4 236 blank 0 237 blank 0 238 blank 0 239 blank 0 240 blank 0 241 blank 0 242 blank 0 243 blank 0 244 blank 0 245 blank 0 246 blank 0 247 blank 0 248 Test 50 249 Test 218 75 250 Test 1750 251 Test 3500 252 Test 7000 253 Test 14000 254 Test 28000 255 serial 0 Hong Kong Victoria Harbour South Korea Soul Thailand Bangkok India Delhi Reunion Saint Denis Diego Garcia USN Diego Garcia South Africa Pretoria Kenya Nairobi Egypt Cairo Turkey Ankara Greece Athens Italy Rome 120 576 120 576 120 576 120 576 120 576 120 576 120 576 90 576 120 576 120 576 Frequencies for testing receiver Individual serial number 22 Manufactured by BHM Electronics Invercargill New Zealand Delivery Address 287 Dee Street Invercargill Postal Address PO Box 787 Invercargill 9840 Phone 0 3 218 3495 Fax 0 3 218 3494 International Phone 64 3 218 3495 International Fax 64 3 218 3494 E mail bhm bhmelectronics co nz 23
8. C FAX Model 2 RADIO FACSIMILE RECEIVER USER HANDBOOK BHM Electronics CONTENTS Introduction Unpacking Mounting Connecting Power and Aerial Loading Paper The Controls Using the C Fax Sample Weather Maps Weather Map Abbreviations Detailed Description of the Controls Care of the C Fax Using an External Receiver Trouble Shooting Replacing the Fuse and Battery Specifications Wiring Connections Frequency List nA SE O I AQ 11 14 14 15 15 16 17 18 Introduction The C Fax radio facsimile receiver has been designed as an easy to use reasonably priced unit with low operating costs The latest in materials and finishes ensure durability and long life and the small size enables fitting in areas where space is at a premium The paper used in this machine is a standard type used in office fax machines and is generally available from most office supply shops Information contained in the weather maps received can be analysed to give useful insight into the weather trends for your particular part of the world This makes it a valuable tool for those to whom the elements are important in their lifestyle or occupation Useful books on the interpretation of these maps are available through most larger book stores After a little practice you will find that quite reliable predictions can be made as to future weather conditions Unpacking Remove the unit from the packing and check that the following is include
9. OW 15950 165 MURMNSK 5335 166 MRMNSK 10130 167 YEKATER 3255 168 SAMARA 4530 169 SAMARA 5102 170 ROSTOV 3610 171 ROSTOV 5280 172 ROSTOV 7630 173 ROSTOV 7968 174 ROSTOV 9100 175 ARKHNGL 3657 176 ARKHNGL 5347 177 ARKHNGL 7762 178 KHBRV 4516 7 179 KHBRVSK 7475 180 KHBRVSK 9230 181 KHBRVS 10220 182 KHBRVS 14610 183 KHBRVS 14737 184 KHBRVS 19275 185 BELARUS 3810 186 BELARUS 7575 187 BELARUS 7640 188 UZBKSTN 3280 189 UZBKSTN 4365 190 UZBKSTN 5285 191 UZBKSTN 5890 192 UZBKSTN 7570 193 UZBKSTN 8083 194 UZBKSTN 9150 195 UZBKSTN 9340 196 UZBKST 13947 197 UZBK 14982 5 198 BEIJING 5527 199 BEIJING 8122 200 BEIJNG 10117 201 BEIJNG 14367 202 BEIJNG 14545 203 BEIJNG 16026 204 BEIJNG 18237 205 SHANGHI 7420 206 SHNGHI 11420 Russia Murmansk 90 576 120 576 Russia Yekaterinburg Russia Samara Russia Rostov na Donu 60 576 90 576 Russia Arkhangelsk Russia Khabarovsk 120 288 60 576 90 576 120 576 Belarus Mensk Uzbekistan Tashkent 120 288 60 576 90 576 120 576 China Beijing 120 576 China Shanghai 21 207 SHNGHI 18940 208 HONG 16904 3 209 KOREA 11476 210 KOREA 13580 211 THAILND 7395 212 THAILD 17520 213 INDIA 4993 5 214 INDIA 7403 215 INDIA 10107 216 INDIA 14842 217 INDIA 18232 218 REUNION 8176 219 REUNIN 16335 220 DIEGO G 7582 221 DIEGOG 12806 222 DIEGOG 20302 223 S AFRCA 7508 224 SAFRC
10. a minimum by taking care when fitting paper rolls that the outside layer of paper is clean and by not touching the print head Avoid excessive cleaning of the print head or the use of abrasive substances Using an External Receiver An external receiver may be used with the C Fax It must be a crystal controlled or synthesised SSB single side band type with LSB lower side band mode Connection should be made from either the speaker output or line level output of the external receiver to the audio socket on the side panel of the C Fax This input will accept a wide range of signal levels from 100mV to 3V RMS Putting a plug into the external receiver socket automatically overrides the internal receiver Switch the external receiver to LSB and tune it to 1 9kHz above the required frequency The contrast control on the C Fax is inoperative when using an external receiver The BFO control on the receiver should be used for fine tuning instead 14 Trouble Shooting Unit is dead no lights Check Power switch is on down Power lead is connected Fuse on side panel is intact Power polarity red wire of lead is positive black is negative Voltage to the C Fax is correct between 12 and 24V If all these check ok or if the fuse fails again after replacement seek technical assistance No Printing Check Paper Out light is not flashing if it is replace the paper Paper is fitted correctly Run switch is in Auto or Start position Rep
11. ashes of the align light 4 When this is equal to the number on the scale release the align switch promptly The rest of the picture should be correctly aligned In the sample map below you would need to hold the align switch for 4 flashes of the align light to realign the left edge Fast Paper Feed switch 5 This switch is used to feed the paper out at a faster than normal rate This allows a completed map to be cleared from the C Fax printer before tearing it off It is also useful for the manual align procedure described above by feeding out some of the picture so it is possible to check the alignment sooner Paper Out indicator light 6 When the end of the paper roll is reached this red light will flash to indicate the C Fax is out of paper and the C Fax will stop printing There is normally a warning stripe printed on most types of paper near the end which shows during the last metre or two to warn that the paper is running out 11 Note Some brands of paper are glued to the center core in this case the paper out light will not operate as the paper remains in the print area If you find this happening try changing the roll within a few maps of the warning stripe appearing Stop Auto Start switch 7 and Run light 8 In the up position the printer is off Only the receiver is working The green run light is off In the centre position the printer automatically starts and stops printing pictures using the received s
12. d 1 x C Fax radio facsimile receiver 1 x roll of thermal paper 216mm by 30m 1 x 2m long power lead with 4 pin plug 1 x 2m coaxial aerial lead with BNC plug 1 x wall mounting bracket fixed to rear of C Fax 2 x spare fuses 2 amps 1 x user handbook 1 x New Zealand and Australian schedule Mounting the C Fax The C Fax may be left free standing or wall mounted on the supplied bracket To fix the C Fax to a wall remove the mounting bracket from the rear of the C Fax by taking out the two screws holding it at the bottom Screw the bracket to the wall slide the C Fax back onto the bracket and replace the two bottom screws Connecting Power and Aerial Plug the power lead into the labelled round 4 pin socket on the panel on the right side of the C Fax The other end of the lead is connected to the power source red wire to positive black wire to negative The C Fax can operate on a direct current DC voltage of from 12 to 24 volts Caution The power lead from the C Fax must not be connected directly to the mains power supply 110V or 230V AC For use with the mains supply a suitable power supply must be used which can supply a DC voltage in the range of 12 to 24 volts at 1 5 amps Such a power supply is available as an optional extra for the C Fax The aerial lead plugs into the BNC socket on the side panel At the other end the center conductor of the coaxial cable should be connected to an outside wire aerial This should consis
13. determine the speed at which the picture is sent and printed Most stations including those in New Zealand and Australia use the default IOC of 576 Most stations which use an IOC of 288 send a different start tone with their pictures which will automatically change the C Fax to 288 Paper Speed 2 12 Pressing this switch changes the paper speed from 120 lines per minute to 60 and then 90 with each successive press Most stations including those in New Zealand and Australia use the default speed of 120 The paper speed must be manually set if the picture you wish to receive is sent at a speed other than 120 13 Care of the C Fax There are no parts to be lubricated When a new roll of paper is fitted remove any paper scraps or dust from the paper compartment At this time also check and clean the rubber pressure roller if necessary If a printed picture has vertical light stripes through it the most likely cause is dirt on the print head If this problem appears open the paper compartment and check the print head which is mounted on a horizontal metal bar at the top of the paper compartment Near the top of the print head is a narrow black line Dirt on this print line causes the reduced print density This should be gently wiped clean with alcohol methylated spirits or isopropyl alcohol on a clean lint free cloth or paper tissue The rubber pressure roller should also only be cleaned with alcohol This problem can be kept to
14. he door To close the paper compartment push the cover closed until both parts of the catches interlock Then hook the lower catch over the upper part and push the lower catch down until it clicks into place The Controls 45678910 11 12 Brief Description of the Controls 1 IOC Selection default is 576 red light is on for 288 Paper Speed default is 120 lines minute yellow light indicates 60 green 90 3 Audio On Off Picture Align Up received signal audible Centre no audio Down hold down to manually align picture 4 Align Indicator used for manual align 5 Fast Paper Feed 6 Paper Out Indicator 7 Stop Auto Start Up receiver only no printing Centre automatic start print stop Down continuous printing 8 Run Indicator printer is operating H Power On Off 10 Data Indicator printing signal 11 Contrast Control fine tuning 12 Channel Display 13 Channel Selection Buttons 14 Fuse 15 Power Input Socket 16 External Receiver Input 17 Aerial Input Socket Using the C Fax Switching On Make sure power plug and aerial connections have been made and that a roll of paper is properly inserted in the C Fax as described on pages 4 and 5 Move the power switch number 9 in the picture on the previous page down The channel display 12 should show the current channel number location and frequency the C Fax is listening to 003 NZ 5807 This indicates that the receiver is set to channel 3 which i
15. lacing the Fuse The fuse on the side panel can be removed for checking or replacement by unscrewing the cap anticlockwise This fuse protects some very expensive components inside the C Fax It must only be replaced with one of the same rating The warranty is void if a heavier fuse is used The fuse is the standard small size 20 x 5mm 2A current rating Replacing the Battery The C Fax uses an internal battery to maintain the last channel memory when it is not turned on The battery has an expected life of at least five years If the C Fax no longer retains the last channel used when switched back on then the battery needs replacing Return the C Fax to the supplier or a qualified technician as the internal battery is soldered in Replace with lithium cell type CR2032 vertical PCB mount 15 Specifications RECORDING SYSTEM RECORDING PAPER INDEX OF COOPERATION SCANNING SPEED RESOLUTION START AND STOP PHASING DATA TONES RECEIVING SYSTEM NUMBER OF CHANNELS FREQUENCY RANGE RECEPTION MODE RECEIVE IF FREQUENCY BFO FREQUENCY SENSITIVITY FINE TUNING DIMENSIONS WEIGHT MOUNTING POSITIONS POWER SUPPLY POWER CONSUMPTION OPTIONS NOTE Printing by static thermal head on thermal paper High sensitivity thermosensitive 288 and 576 60 90 and 120 lines per minute 8 dots mm Automatic or manual Automatic or manual White 1500Hz Black 2300Hz Double conversion superheterodyne 256 pre programmed 50kHz to 30MHz F4
16. m so as not to leave any of the printout inside the C Fax Tearing off the paper is best done in a downwards direction against the edge of the metal strip Sample Weather Maps Australia Significant Weather Prognosis Australia Mean Sea Level Prognosis SC rt Ga mz er ne Fi Se BBE SIGN PROG CAT AREA BUREAU OF VALID omr sr ee O Gi Gi GO E a ISSUED 9 mar 1997 0038 LTC ASSOCIAFEO AS NOTE USE OF CB IMPLIES Ne oe FHUMDERSTIIRMS ANG THE OCCURRENCE ME 770 270 var Den 10 MAST METEGROLOGY SEVERE ICING SEWERE TUREEM ENCE AND HAL MA ES JR PAY 1897 L t ms gt nese PST Se Darwin Tropics Significant Weather Prognosis Indian Ocean Mean Sea Level Prognosis e ne ES Zur emt MI ARAFO e r S SIGWX PROG mm AE DEA Ke im 9 BE ONE Ove tea ure or E 10 Forecast 1 3L19 GASP d e Ges ER ae SHR FORECAST VALID 1200 UTG Sot 16 MAY 1997 HSLP ACER EE ae i MET E E Contour interval 5 hPa ISSUED PUTE O8 Moy 1997 Weather Map Abbreviations These are some of the common abbreviations you will see on weather maps Map areas ASIA IO NPAC NREG NZ SPC SWP TNZ Map Types ANAL FCST MAR WX NEPHANAL PROG SIG WX TEMP Levels MSL 700MB 500MB 250MB Time GMT UTC H number 50 N to 50 S 100 E to 180 Indian Ocean 50 N to 50 S 160 E to
17. s a New Zealand frequency of 5807 kHz kilohertz If the C Fax has not been used before it may be set to an unused channel for example channel zero shows the date the internal frequency list was last updated for example Selecting a Channel To change the channel use the two channel selection buttons 13 to move up or down the list Refer to the frequency list starting on page 18 to find the channel number of a station transmitting near you then change to this channel The yellow data light 10 should be on or flickering This indicates a signal is present If it is not already on turn on the audio by flicking the Audio switch 3 up You should be able to hear the received signal If you hear a continuous tone this is a tone many stations send between maps If you can hear a signal quickly changing between two tones then a picture is being sent Try all the different frequencies for your local station to find the signal which sounds loudest and has the least static in it Printing a Picture Set the Start switch 7 to the middle position for automatic stop and start When a picture is sent it is preceded by a start signal telling the receiver to start printing This is heard as a tone lasting from 5 to 10 seconds Next the transmitting station sends the alignment signal which synchronises the picture being sent with that being printed This usually sounds as two tones a very short tone and a longer half second tone repeated for
18. t of a length of wire approximately 10 to 12 metres long 30 to 40 feet The wire should run horizontally and be supported at each end by insulators with a lead taken from one end to the C Fax The aerial is not critical try any existing high frequency aerial first Caution Never connect the C Fax to an aerial used by a radio transmitter Severe damage could occur to the receiver in the C Fax The outside shield on the end of the aerial cable can be connected to an earth such as the hull of a metal boat or a metal rod driven into the ground as close as practical to the C Fax This earthing is not absolutely necessary but can be of help in reducing interference on the printed pictures Loading Paper The C Fax uses standard telephone fax machine paper 216mm wide the recommended paper length is 30m To load a roll of paper into the C Fax open the two catches located each side on the front Pull the lower edge of the catch away from the C Fax and then unhook the upper edge The lower section of the case will then open down Remove the empty roll by pushing it to the right against the spring and then pulling it up and out Insert a new roll of paper by pushing the right end against the spring and then pushing the left end down Make sure the outside surface of the paper roll is against the print head as shown in the illustration below This is the side of the paper that the C Fax prints on Pull the paper up and out the front before closing t
19. tart and stop signals The run light is on during printing In the down position the printer starts and prints continuously The run light remains on If you have missed the start signal of a picture moving the switch down will start the picture printing Moving the switch back to Auto lets the picture print until the normal stop signal is received Starting a picture manually normally requires it to be manually aligned on the paper see the Align section on the previous page Power switch 9 In the up position the C Fax is turned off In the down position the C Fax is turned on The channel display back lighting turns on and the last used channel is shown Data light 10 The yellow data light turns on when a signal is received It will normally flicker when a picture is being sent Contrast Control 11 This knob is used to control picture print quality It acts as a fine tune control for the radio receiver Normally it is left with the pointer set vertically in line with the index mark In noisy reception conditions it may help to set this control a little anticlockwise from normal Note if this control is set too far from centre in either direction it may affect the automatic start stop function Use with caution IOC Switch 1 Pressing this switch changes the IOC index of cooperation which the C Fax uses A red light indicates the IOC is set to 288 Pressing the switch again changes it back to the default setting of 576 The IOC is used to
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