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? data device corporation 105 wilbur place bohemia, new york 11716 631-567-5600 fax: 631-567-7358 www.ddc-web.com for more information contact: technical support: 1-800-ddc-5757 ext. 7771 features ? 7 va drive capability for ct, cdx, or tr loads double buffered transparent input latch 16-bit resolution up to 2 minute accuracy power amplifier uses pulsating or dc supplies built-in-test (bit ) output description the dsc-10510 is a high power digital-to-synchro converter, with 16-bit resolution and up to 2 minute accuracy. the dsc-10510 is capable of driving multiple control transformer (ct), control differential transmitter (cdx) and torque receiver (tr) loads up to 7 va. the dsc-10510 contains a high accuracy d/r converter, a triple power amplifier stage, a walk-around circuit (to prevent torque receiver hangups), and thermal and over-current protection circuits. the hybrid is protected against overloads, load transients, over-temperature, loss of reference, and power amplifier or dc power supply shutdown. microprocessor compatibility is provided through a 16-bit/2-byte dou- ble-buffered input latch. data input is natural binary angle in ttl com- patible parallel positive logic format. packaged in a 40-pin tdip, the dsc-10510 features a power stage that may be driven by either a standard 15 vdc supply or by a pulsating reference supply when used with an optional power transformer. when powered by the reference source, heat dissipation is reduced by 50%. applications the dsc-10510 can be used where digitized shaft angle data must be converted to an analog format for driving ct?s, cdx?s, and tr loads. with its double buffered input latches, the dsc-10510 easily interfaces with microprocessor based systems such as flight simulators, flight instrumentation, fire control systems, and flight data computers. ? 1986, 1999 data device corporation ddc custom monolithics utilized in this product are copyright under the semiconductor chip protection act. dsc-10510 7 va digital-to-synchro (d/s) converter make sure the next card you purchase has... m
2 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 figure 1. dsc-10510 block diagram d/r converter high accuracy low scale factor variation electronic scott-t & triple power amplifier walk around circuit transparent latch transparent latch delay over-current power stage enable thermal sense 140 ? case remote sense 19 s1' 20 s1 s1 25 s2' 21 s2 s2 26 s3' 22 s3 s3 bit 39 15 vdc - r -r 37 en bs 38 40 k 15 vdc bits 9-16 9-16 32 ll 1-8 bits 1-8 lm 33 28 31 la 3.4 v ref rh' 13k 35 rl' 13k 34 26 v ref rh 100k 18 rl 100k 17 r 36 -r 30 +15 vdc -15 vdc +v or +15 v 29 23 sin cos -v or -15 v 24 - +
3 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 table 1. dsc-10510 specifications parameter value description resolution 16 bits bit 1 = msb, bit 16 = lsb accuracy 2 or 4 minutes (note 1) differential linearity 1 lsb max in the 16th bit output settling time 40 s max for any digital input step change (passive loads) digital input/output logic type digital inputs loading k digital outputs bit drive capability logic 0 = 0.8 v max logic 1 = 2.0 v min 20 a max to gnd//5pf max 20 a max to +5v//5pf max 20 a max logic 0 = 1 ttl load logic 1 = 10 ttl loads ttl/cmos compatible all inputs except k (kick pin 40) bits 1 - 16, bs , and en ll , lm , and la (cmos transient protected) ground to enable kick circuit, open to disable; pulls self up to +15v. logic 0 for bit condition (see bit pin function) 1.6ma at 0.4v max 0.4ma at 2.8v min reference input type max voltage w/o damage frequency input impedance single ended differential 26 vrms differential 3.4 vrms differential 72.8 vrms for rh - rl 9.52 vrms for rh' - rl' dc to 1 khz 100k ohms 0.5% 13k ohms 0.5% 200k ohms 0.5% 26k ohms 0.5% rh - rl rh' - rl' rh - rl rh' - rl' rh - rl rh' - rl' synchro output voltage l-l scale factor variation current ct, cdx or tr load dc offset protection 11.8 vrms 0.5% for nom ref v 0.1% max 700 ma rms max 7 va max 15 mv max simultaneous amplitude variation on all output lines as a function of digi- tal angle. each line to ground. varies with angle. output protected from overcurrent, voltage feedback transient, and over temperature, loss of reference, loss of power amplifier, and loss of dc supply voltage. power supply characteristics nominal voltage voltage range max voltage w/o damage current 15 v 5% 18v 25 ma max v 20 v peak max, 3 v above output min 25 v load dependent temperature ranges operating (case) -3xx -1xx storage 0c to +70c -55c to +125c -65c to +150c physical characteristics size weight 2.0 x 1.1 x 0.2 inches (50.8 x 27.9 x 5.1 mm) 0.9 oz (25.5 g) 40 pin triple dip note 1: dsc-10510-303 accuracy = 4 minutes (no load) + 1.6 minutes at full load (7 va inductive) dsc-10510-304 accuracy = 2 minutes (no load) + 1.6 minutes at full load (7 va inductive)
4 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 introduction system considerations: power surge at turn on the output power stages can fully turn on before all the supplies stabilize, when power is initially applied. multiple d/s converters with substantial loads can cause the system power supply to have difficulty coming up and may even cause the supply to shut down. it is important that the power supply can handle the turn- on surge or that the d/s turn-ons be staggered. typically, the surge will be twice the max rated draw of the converter. power supply cycling power supply cycling of the dsc-10510 should follow the guide- lines below to avoid any potential problems. strictly maintain proper sequencing of supplies and signals per typical cmos circuit guidelines: - apply power supplies first (+15, -15v and ground). - apply digital control signals next. - apply analog signals last. the reverse sequence should be followed during power down of the circuit. it is also recommended that the kick pin, if unused, be left in the ?no connection? (n/c) state. the internal pull up will disable the pin (this removes any unnecessary voltages from the converter). torque load management the above problems are compounded by the high power levels involved when multiple torque loads (tr) are being driven. in this configuration, power supply fold back problems are common unless the stagger technique is used. the load will also need time to stabilize. on turn-on it is likely that some of output loads will be at a different angle than the d/s output. as the angular dif- ference increases so does the power draw until the difference is 180 degrees. at this point the load impedance drops to zss and current draw is at a maximum. pulsating power supplies d/s and d/r converters have been designed to operate their out- put power stages with pulsating power to reduce power dissipa- tion and power demand from regulated supplies. figures 2 and 3 illustrate this technique. the power output stage is only supplied with enough instantaneous voltage to be able to drive the required instantaneous signal level. the ac reference can be full wave rectified and applied to the push-pull output drivers since the output signal is required to be in phase with the ac refer- ence. the supply voltage will be just a few volts more than the output signal and internal power dissipation is minimized. reference source 26v rms 400hz 1 2 3 4 5 6 7 3.4v rms 21.6v rms c.t. d1 d2 d3 d4 c1 c2 + + rl' rh' +v gnd -v s1 s2 s3 digital input 15vdc dsc10510 s1 s1' s2 s2' s3 s3' t1 42359 notes: parts list for 400hz d1, d2, d3, d4 = 1n4245 c1 and c2 = 47f, 35v dc capacitor see figure 14 figure 2. typical connection diagram utilizing pulsating power source figure 3. pulsating power supply voltage waveforms +v - v +dc supply level -dc supply level positive pulsating supply voltage negative pulsating supply voltage amplifier output voltage envelope
5 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 thermal considerations power dissipation in d/s and d/r circuits is dependent on the load, whether active (tr) or passive (ct or cdx), and the power supply, whether dc or pulsating. with inductive loads virtually all the power consumed will have to be dissipated in the output amplifiers. this can require considerable care in heat sinking. example: for illustrative purposes the following thermal calculations are made using the dsc-10510?s specifications. the dsc-10510 has a 7 va drive capability for ct, cdx, or tr loads. simplest case first: passive inductive load and 15 volt dc power stage supplies (as shown in figure 2) . the power dis- sipated in the power stage can be calculated by taking the inte- gral of the instantaneous current multiplied by the voltage differ- ence from the dc supply that supplies the current and instanta- neous output voltage over one cycle of the reference. for an inductive load this is a rather tedious calculation. instead take the difference between the power input from the dc supplies minus the power delivered to the load. an actual synchro load is highly inductive with a q of 4-6; therefore assume that it is purely reac- tive. the power out, then, is 0 watts. as a worst case scenario, also assume the load is the full 7 va, the converter?s rated load. the va delivered to the load is independent of the angle but the voltage across the synchro varies with the angle from a high of 11.8 volts line-to-line (l-l) to a low of 10.2 v l-l (note 1). the maximum current therefore is 7va/10.2 v = 0.68 a rms. the out- put is l-l push-pull, that is, all the current flows from the positive supply out to the load and back to the negative supply. the power input is the dc voltage times the average current or 30 v x (0.68 a x 0.635/0.707) [avg/rms] = 18.32 watts. note 1: the dsc-10510 has an 11.8 vl-l synchro output. in this case, we use 11.8v x sin 120 = 11.8v x .866 = 10.2 vl-l. to calculate the load use zso. zso is the impedance between one of the three stator wires and the other two shorted together with the rotor open circuit. vl-l x .866 is the voltage that would result from this configuration. the power dissipated by the output driver stage is over 18 watts shared by the six power transistors. since one synchro line sup- plies all the current while the other two share it equally, one will dissipate 2/3 of the power and the other two will each dissipate 1/3. there are 2 transistors per power stage so each of the two transistors dissipates 1/3 of the power and the other transistors dissipate 1/6 of the power. this results in a maximum power in any one transistor of 1/3 x 18.32 w = 6.04 watts. the heat rise from the junction to the outside of the package, assuming a ther- mal impedance of 4c per watt = 24.16c. at an operating case temperature of 125c the maximum junction temperature will be 149.16c. the other extreme condition to consider is when the output volt- age is 11.8 v. the current then will be 0.42 amps and the power will be 30 x (0.42a x 0.635/0.707) = 11.32 watts. a similar cal- culation will show the maximum power per transistor to be 2.3 watts. this is much less than when the output voltage is 10.2 v. for pulsating supplies the analysis is much more difficult. calculations for a purely reactive load with dc supplies equal to the output voltage peak vs. pulsating supplies with a supply volt- age equal to the output voltage yield an exact halving of the power dissipated . at light loads the pulsating supplies approxi- mate dc supplies and at heavy loads, which is the worst case, they approximate a pulsating supply as shown in figure 4. advantages of the pulsating supply technique are: +15vdc -15vdc light load heavy load figure 4. loaded waveforms ref in d/s r2=1 1/3 ? r1=2/3 ? ref zso=8.6 ? notes: r1 + r2 zss 3-wire synchro 2-wire ref active load figure 5. equivalent 2-wire circuit figure 6. torque system r1 r2 r1 r2 ref ref torque transmitter torque receiver
6 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 reduced load on the regulated 15 vdc supplies halving of the total power simplified power dissipation management active load active loads (torque receivers) make it more difficult to calculate power dissipation. the load is composed of an active part and a passive part. figure 5 illustrates the equivalent two wire circuit. at null, when the torque receiver?s shaft rotates to the angle that minimizes the current in r2, the power dissipated is at its lowest. the typical ratio of zso/zss = 4.3. for the maximum specified load of zss = 2 ohm, the zso = 2 x 4.3 = 8.6 ohms. also, the typ- ical ratio of r2/r1= 2. in synchro systems with a torque transmitter driving a torque receiver, the actual line impedances are as shown in figure 6. the torque transmitter and torque receiver are electrically identi- cal, so that the total line impedance is double that of figure 5. the torque system is designed to operate this way. the higher the total line impedances, the lower the current flow at null and the lower the power dissipation. it is recommended that with torque loads, discrete resistors be used as shown in figures 7 and 8. a torque load is normally at null. once the torque receiver nulls at power turn on, the digital commands to the d/s are typically in smaller angular steps, so the torque system is always at or near null. large digital steps, load disturbances, a stuck torque receiv- er or one synchro line open, however, cause an off null condition. at null the load current could be zero (see figure 9 ). if vac = vab, both in magnitude and phase, then, when ?a? is connected to ?b,? no current will flow. pick c1 and c2 to match the phase lead of r1 ? zso. in practice this ideal situation is not realized. the input to output transformation ratio of torque receivers is specified at 2% and the turns ratio at 0.4%. the in-phase current flow due to this nominal output voltage (10.2 v) multiplied by the % error (2.4/100) divided by total resistance (4 ohms) = 61ma. a phase lead mismatch between the torque receiver and the converter of 1 degree results in a quadrature current of 10.2 v x sin 1/4 ohms = 44.5 ma. total current is the phaser sum 61 + 44.5 = 75.5 ma. power dissipation is 30 vdc x 75.5 ma rms x 0.9 (avg/rms) = 2.04 watts. since this is a light load condition, even pulsating supplies would be approximating dc supplies. the off null condition power dissipation is quite different. actual synchros have no current limiting, so the circuit current is the cur- rent that the circuit conditions demand. the worst case would be for a 180 degree error between the two synchros as shown in figure 10. for this condition the two equivalent voltage sources are 10.2 v opposing. the current is (10.2 x 2) / 4 = 5.1 a in phase. the power dissipated in the converter is the power supplied by the 15 vdc supplies minus the power delivered to the load (30 v x 5.1 a x 0.9) - (10.2 v x 5.1 a) = 87.7 watts for dc supplies. this requires a large power supply and high wattage resistors. figure 7. d/s equivalent ref in rh rl d/s 2 ? 11/3 ? 2/3 ? zso=8.6 ? ref torque load with discrete external resistor 1.33 ? 1.33 ? 1.33 ? s1 s2 s3 rh rl s1 s2 s3 d/s tr ref in ref figure 8. d/s - actual hook-up 2 ? rh rl a d/s 1 1/3 ? 2/3 ? ref zso=8.6 ? b c ref in c1 c2 r1 figure 9. ideal null condition
7 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 the converter output current is typically limited (in the dsc- 10510 case to 0.8 a peak). this limits the power supply to more reasonable values but introduces another problem ? the torque receiver can hang up in a continuous current limited condition at a false stable null. the dsc-10510 has special circuits that sense this continuous current overload condition and sends a momentary 45 ?kick? to the torque receiver thus knocking it off the false null. the torque receiver will then swing to the correct angle and properly null. if the torque receiver is stuck it will not be able to swing off the over-current condition. in this case the converter will send a bit signal when the case temperature exceeds 140c. this bit signal can be used to shut down the output power stage. an additional advantage of using pulsating power supplies is that the loss of reference when driving torque loads is fail safe. the load will pump up the v voltage through the power stage clamp diodes and the loss of the reference detector will disable the power stage. the power stage will be turned off with the required power supply voltages. the pulsating power supply diodes will isolate the pumped up pulsating supplies from the reference. if the dc power supplies are to be used for the power stage, and there is a possibility of the dc supplies being off while the refer- ence to the torque receiver is on, then the protection circuitry shown in figure 11 is highly recommended. a remote sense feature is incorporated in ddc?s dsc-10510 hybrid digital-to-synchro converter. rated at 7 va, it offers accu- racies to 2 minutes of arc at the load. this remote sense feature operates just as other precision sources do. a separate line is 2 ? d/s 2 ? 10.2v +15v 10.2v - 15v figure 10. worst case 180 error d/s +v -v + -v +15vdc -15vdc figure 11. protection circuitry
8 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 data changing data stable 50 ns min. 100 ns min. 50 ns min. 100 ns min. 200 ns min. 200 ns min. ll lm la data bits (9-16) bits (1-8) 200 ns min. la, lm, ll transparent = hi latched = lo figure 12b . ll ,lm ,la timing diagram (8 bit) figure 12a. ll ,lm ,la timing diagram (16 bit)
9 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 0.900 (22.86) 0.018 0.002 (0.46 0.05) dia pin side view bottom view 2.14 (54.36) 19 eq. sp. 0.100 = 1.9 tol. noncum (2.5 = 48.3) 1.140 (28.96) 0.200 max (5.08) 0.17 min (4.32) 20 21 140 0.120 0.002 (3.05 0.05) 0.120 0.002 (3.05 0.05) notes: 1. dimensions are in inches (millimeters). 2. lead identification numbers for reference only. 3. lead cluster shall be centered within 0.10 of outline dimensions. lead spac- ing dimensions apply only at seating plane. 4. pin material meets solderability requirements of mil-prf-38534 figure 13. dsc-10510 mechanical outline 40-pin tdip table 2. dsc-10510 pin functions pin name function 1 do1 digital input 01 (msb) logic ?1? enables. 2 do2 digital input 02 3 do3 digital input 03 4 do4 digital input 04 5 do5 digital input 05 6 do6 digital input 06 7 do7 digital input 07 8 do8 digital input 08 9 do9 digital input 09 10 do10 digital input 10 11 do11 digital input 11 12 do12 digital input 12 13 do13 digital input 13 14 do14 digital input 14 15 do15 digital input 15 16 do16 digital input 16 (lsb) 17 rl 26 vrms reference low input 18 rh 26 vrms reference high input 19 s1' synchro s1 remote sense output 20 s1 synchro s1 output 21 s2 synchro s2 output 22 s3 synchro s3 output 23 +v power stage +v 24 -v power stage -v 25 s2' synchro s2 remote sense output 26 s3' synchro s3 remote sense output 27 nc no connection 28 gnd ground 29 -15 v power supply 30 + 15v power supply 31 la 2nd latch all enable. input enables dual latch. 32 ll 1st latch lsbs enable. enables bits 9 - 16 33 lm 1st latch msbs enable. enables bits 1 - 8 34 rl' 3.4 vrms reference low input 35 rh' 3.4 vrms reference high input 36 -r (tp) no connection. factory test point. 37 en enable. power stage enable input allows for digital shutdown of power stage. gives complete control of converter to digital system. 38 bs battle short input. logic 0 overrides over tempera- ture protection. 39 bit built-in-test output. logic 0 when loss of reference, loss of 15 vdc supply, case temperature of +140c, or an output over-current has been detect- ed. loss of reference, loss of 15 vdc supply or case temperature of +140c will disable the power- output stage. 40 k kick. input used for reducing excessive current flow in torque receiver loads at false null. 16 bit digital word ( ) (1 = msb, 16 = lsb) 1 2 3 4 5 6 7 8 9 10 11 1 2 13 14 1 5 16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 degrees (hex) 0 (0000) 15 (0aab) 30 (1555) 45 (2000) 60 (2aab) 75 (3666) 90 (4000) 120 (5555) 135 (6000) 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 0 1 0 1 0 0 0 1 0 1 1 1 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 180 (8000) 240 (aaab) 270 (c000) 285 (caab) 300 (d555) 315 (e000) 330 (eaab) 345 (f555) 359 (ffff) 0 table 3.angles in degrees cross referenced to a 16-bit digital word 0
10 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 figure 14. ddc 42359 outline drawing (26 volt power transformer) .725 max. 1.435 .010 .183 .015 .100 (typ) 4 equal spaces @ .100 = .400 (total non - cum. ) 4-40 8 threads threaded insert (2 places) .700 .300 1.00 .015 .150 .015 .128 ref. 1.545 1.800 .015 .055 (typ) .190 min. .020 .002 dia. (typ) note: for reference only, contact beta transformer corporation for spec details. 4 1 2 3 5 6 7 schematic
11 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 figure 15. ddc 42929 outline drawing .040 dia .005 pins 6 places .200 min .900 .20 1.30 max 2.40 max 2.000 .250 .650 .20 (5) (6) (4) (3) (1) (2) .450 .350 .450 .550 max .730 4 5 6 1 3 2 } } 11.8 v input 11.8 v output 6-32 stainless steel inserts 8 thd min (4 req'd) 400 hz 11.8 v synchro to 11.8 v synchro at 400 hz (use for s2 grounded applications) note: for ref only, contact beta transformer corporation for spec details.
12 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 figure 16. ddc 41402 outline drawing .040 dia .005 pins 6 places .200 min .900 .20 1.30 max 2.40 max 2.000 .250 .650 6- 32 insert 8 thd min 4 places .20 (5) (6) (4) (3) (1) (2) .450 .350 .450 .550 max .730 5 6 7 1 4 2 } 11.8 v input } 90 v @ 5va max output 400 hz note: for ref only, contact beta transformer corporation for spec details.
13 data device corporation www.ddc-web.com dsc-10510 m-04/06-0 ordering information dsc-10510-xxxx supplemental process requirements: s = pre-cap source inspection l = pull test q = pull test and pre-cap inspection blank = none of the above accuracy: 3 = 4 minutes (no load) + 1.6 minutes at full load (7va inductive) 4 = 2 minutes (no load) + 1.6 minutes at full load (7va inductive) process requirements: 0 = standard ddc processing, no burn-in (see table below.) 1 = mil-prf-38534 compliant (note 3) 2 = b (note 1) 3 = mil-prf-38534 compliant with pind testing (note 3) 4 = mil-prf-38534 compliant with solder dip (note 3) 5 = mil-prf-38534 compliant with pind testing and solder dip (note 3) 6 = b (note 1) with pind testing 7 = b (note 1) with solder dip 8 = b (note 1) with pind testing and solder dip 9 = standard ddc processing with solder dip, no burn-in (see table below.) temperature grade/data requirements: 1 = -55c to +125c 2 = -40c to +85c 3 = 0c to +70c 4 = -55c to +125c with variables test data 5 = -40c to +85c with variables test data 8 = 0c to +70c with variables test data transformers 1) optional power transformer, ddc p/n 42359 (see figure 2 & 14) 2) for s2 grounded applications, use transformer ddc p/n 42929 (figure 15) synchro to synchro 11.8v to 11.8v 400hz 3) synchro 11.8v to synchro 90v, 400hz 5 va max, see beta scott-t #41402 (figure 16). notes: 1. standard ddc processing with burn-in and full temperature test?see table below. 2. these products contain tin-lead solder finish as applicable to solder dip requirements. 3. mil-prf-38534 product grading is designated with the following dash numbers: class h is a -11x, 13x, 14x, 15x, 41x, 43x, 44x, 45x class g is a -21x, 23x, 24x, 25x, 51x, 53x, 54x, 55x class d is a -31x, 33x, 34x, 35x, 81x, 83x, 84x, 85x table 1 1015 (note 1) , 1030 (note 2) burn-in notes: 1. for process requirement "b" (refer to ordering information), devices may be non-compliant with mil- std-883, test method 1015, paragraph 3.2. contact factory for details. 2. when applicable. 3000g 2001 constant acceleration c 1010 temperature cycle a and c 1014 seal ? 2009, 2010, 2017, and 2032 inspection condition(s) method(s) mil-std-883 test standard ddc processing for hybrid and monolithic hermetic products
the information in this data sheet is believed to be accurate; however, no responsibility is assumed by data device corporation for its use, and no license or rights are granted by implication or otherwise in connection therewith. specifications are subject to change without notice. please visit our web site at www.ddc-web.com for the latest information. 105 wilbur place, bohemia, new york 11716-2482 for technical support - 1-800-ddc-5757 ext. 7771 headquarters, n.y., u.s.a. - tel: (631) 567-5600, fax: (631) 567-7358 southeast, u.s.a. - tel: (703) 450-7900, fax: (703) 450-6610 west coast, u.s.a. - tel: (714) 895-9777, fax: (714) 895-4988 united kingdom - tel: +44-(0)1635-811140, fax: +44-(0)1635-32264 ireland - tel: +353-21-341065, fax: +353-21-341568 france - tel: +33-(0)1-41-16-3424, fax: +33-(0)1-41-16-3425 germany - tel: +49-(0)89-150012-11, fax: +49-(0)89-150012-22 japan - tel: +81-(0)3-3814-7688, fax: +81-(0)3-3814-7689 world wide web - http://www.ddc-web.com 14 m-04/06-0 printed in the u.s.a. data device corporation registered to iso 9001:2000 file no. a5976 r e g i s t e r e d f i r m ? u

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