The PC-104DS Series are Low Cost, Dual Channel, PC104 Compliant Synchro/Resolver Output Cards designed to simulate precision AC synchro and resolver formatted signals for use in Navigation and positioning systems, or test sets on both industrial and COTS - military type applications.
All models provide 16 Bits resolution (0.0055o), and model selectable accuracy grades from +/-4 arc. minutes to +\-30 arc. seconds.
These units feature virtually indestructible, thermally and transient protected, completely short circuit proof, low output impedance amplifiers capable of providing up to a full 50 ma. + output drive per channel. Metallic heat sinks are provided to assure high reliability as installed and loaded over the full operating temperature range.
BIT inputs and Enable outputs are facilitated for direct compatibility with external Synchro booster amplifiers for driving very high power loads up to 300 VA.
Models are available in both commercial (parts 0oC to +70oC) and extended COTS - Military/Industrial (parts -40oC to +85oC) operating temperature range selections.
Additionally, the PC104-DS Series feature internal micro-transformers for 100% isolation of the AC Reference inputs. They accept either direct 115, 26VAC or user scalable inputs as standard model selections.
The use of internal Isolation Transformers on the reference inputs provides phasing flexibility, immunity from ground loops or ground reference induced noise, and are an effective barrier to prevent any electrical noise on the reference source input from effecting the users digital control system and the PC104 databus’ DC supply rails. Because the AC Reference source is commonly shared or tied to many different destination (other hardware) in a typical system; isolation on the reference inputs protects not only the user circuitry of the D-R converter, but also every user of the reference source in the system.
When integrated on applications as add-on hardware; the isolation assures the user that the add-on hardware is non obtrusive, and causes no conflict with any existing apparatus. High input impedance and very low current draw on the reference input (typically less than 1 ma.) assures compatibility with low current drive resolver circuits typically used on R-D converter, but also every user of the reference source in the system.
On 26/11.8 Volt (and lower voltage) systems; considerable cost savings are achieved by using the robust output drivers direct, especially when driving captive (single destination) synchro or resolver loads, or when driving isolated S-D’s/R-D’s, or external synchro booster amplifiers.
For synchro resolver outputs driving multiple destinations, or synchro loads driving a grounded stator (Z leg typical or many aircraft app’s.), and on 50/60 Hz. applications; convenient bulkhead mounted external synchro output transformers are provided as options.
The PC104-DS Series use a true 16 Bit databus, and paired multispeed multiturn fine/coarse outputs are facilitated with any ratio, even with either intentional or unintentional fine/coarse offset alignments.
The converter outputs are set to zero angle for predictability on power up, until commanded to the desired angle in the application software. And a reference loss detect is reported in the status word for validation.
The PC104-DS Series can be populated with up to 4 different style output converters:
Standard Digital to Synchro / Resolver converter features, lowest cost standard ratio accuracy grades to +/-2 arc. minutes, frequencies of 47 to 3KHz. and low scale factor variation.
High performance Digital to Synchro / Resolver converters, absolute accuracies to +/-30 arc. seconds, frequencies to 20KHz.
Digital to LVDT and RVDT
Digital Vector Generators, providing 16 Bit precision DC Sine/Cosine
To cover the most commonly used requirements the HDR Series are primarily covered in this data file.
The 16 Bit digital data is binary weighted angle. The input data is converted to AC resolver type signals representing the sine and cosine of the digital angle, at the carrier frequency of the reference input (Resolver outputs, Synchro Outputs are: Sine, Sine +120o, and Sine +240o at the carrier frequency of the reference input). The output signals continuously tracks the reference input, always preserving the transformation ratio like that of a resolver of synchro itself. The ratio accuracy of the HDR series makes them ideal for use in driving R-D converters, resolver / synchro chains and repeaters, and R-D based motion control systems.
These units are ideal for many GPS type applications, heads-up display systems, field test equipment mobile antenna’s, air and nautical navigation aids.