NORTH ATLANTIC INDUSTRIES

North Atlantic Industries' Website

NORTH ATLANTIC INDUSTRIES, Apex Signal Division
170 Wilbur Place
Bohemia, NY 11716, USA
Telephone: (631) 567-1100
Fax: (631) 567-1823
E-mail: sales@naii.com
http://www.naii.com

Sales/Technical: sales@naii.com, techsupport@naii.com

North Atlantic Industries, Inc. is one of the world's leading suppliers of High Performance Solutions for the Embedded and Test Markets supporting Measurement, Control, Simulation and Test applications. Typical products include: SYN/RES/LVDT converters, D/As, A/Ds, Discrete I/O, Digital I/O, Reference/Excitation Supplies, RS-232/422/485 and Pulse Width Modulated Amplifiers. North Atlantic Industries is committed to producing high quality, cost-effective commercial off-the-shelf (COTS) products for your most demanding requirements. North Atlantic Industries also provides customized COTS solutions to meet specialized applications. Products are available in a variety of standard formats including, but not limited to, VME, VXI, PMC, PCI, cPCI, PC/104 and ISA as well as rack & stack instruments.

Analog I/O Boards

Function Description Software
Support ADDR/
DATA
Width Size

Multifunction
I/O Provides high performance and high functional density along with enhanced diagnostics to support Embedded and Test & Measurement applications. Features include self-calibration, low power and user-programmable parameters. Functions per slot include A/D, D/A, RTD, Discrete & Digital I/O, Synchro/Resolver and LVDT/RVDT. Available in two temperature ranges (0 to 70°C) or (-40 to +85°C) in both air-cooled and conduction-cooled versions Model No. 64C1 . .6 6U

Function	Description	Software Support	ADDR/ DATA Width	Size
Multifunction I/O	Provides high performance and high functional density along with enhanced diagnostics to support Embedded and Test & Measurement applications. Features include self-calibration, low power and user-programmable parameters. Functions per slot include A/D, D/A, RTD, Discrete & Digital I/O, Synchro/Resolver and LVDT/RVDT. Available in two temperature ranges (0 to 70°C) or (-40 to +85°C) in both air-cooled and conduction-cooled versions Model No. 64C1	.	.6	6U

Digital I/O Boards

Function Description Software
Support ADDR/DATA
Width Size

32
Solid State
Relays
Hi-side
Switched 32 optically isolated solid state relays, 40 VDC, 2A continuous, 5A inrush. Short circuit protected. Dissipates only 7.5 watts. Senses overload and open circuit. Background Bit testing continually checks performance. A failure triggers an interrupt. Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64SW2 . A32:D16 6U

Up To
96 Channels
Discrete I/O Input or Output Voltage: 50 VDC max, Input Switching threshold: Multi-level programmable (1 VDC to 50 VDC with 10 bit resolution) , Programmable de-bounce for each channel, Programmable contact or voltage sensing. Model 64DT1 Series contact factory VxWorks A32:D16 6U

Up To
96 Channels
Digital I/O Continuous background bit testing, Each channel separately programmable for either Input or Output, Short circuit protected outputs, Programmable de-bounce for each channel, Power-on Self-Test (POST). Model 64DG1 Series contact factory VxWorks A32:D16 6U

Function	Description	Software Support	ADDR/DATA Width	Size
32 Solid State Relays Hi-side Switched	32 optically isolated solid state relays, 40 VDC, 2A continuous, 5A inrush. Short circuit protected. Dissipates only 7.5 watts. Senses overload and open circuit. Background Bit testing continually checks performance. A failure triggers an interrupt. Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64SW2	.	A32:D16	6U
Up To 96 Channels Discrete I/O	Input or Output Voltage: 50 VDC max, Input Switching threshold: Multi-level programmable (1 VDC to 50 VDC with 10 bit resolution) , Programmable de-bounce for each channel, Programmable contact or voltage sensing. Model 64DT1 Series contact factory	VxWorks	A32:D16	6U
Up To 96 Channels Digital I/O	Continuous background bit testing, Each channel separately programmable for either Input or Output, Short circuit protected outputs, Programmable de-bounce for each channel, Power-on Self-Test (POST). Model 64DG1 Series contact factory	VxWorks	A32:D16	6U

Serial I/O Boards

Function Description Software
Support ADDR/DATA
Width Size

RS-232
RS-422
RS-485 8 independent programmable intelligent synchronous (2 Mbit/s) and asynchronous (450 Kbit/s) full duplex communications channels that can individually be configured for either RS-232C, RS-422 or RS-485. Receive and Transmit buffers are each 16 kBytes. On-board processor controls each channel and is also used to communicate with host processor card. Internal loop-back test will be performed when power is applied and results will be stored in registers. I/O at front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model 64RS1 VxWorks A32:D16 6U

RS-232
RS-422
or RS-485 This sophisticated, high-speed, DSP-based card incorporates up to 12 intelligent, full duplex communications channels that can be individually software configured for either RS-232C, RS-422 or RS-485 Synchronous or Asynchronous Communication. Model No. 64RS2 . . 6U

RS-232
RS-422
RS-485 18 independent programmable intelligent synchronous (4 Mbit/s) and asynchronous (1 Mbit/s) full duplex communications channels that can individually be configured for either RS-232C, RS-422 or RS-485. Receive and Transmit buffers are each 32 kBytes. On-board processor controls each channel and is also used to communicate with host processor card. Internal loop-back test will be performed when power is applied and results will be stored in registers. I/O at front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model 64RS3 VxWorks A32:D16 6U

Multifunction VME card features a modular approach that enables the user to select a combination of functions (Up to 6 Modules). Modules include: A/D (±10v and ±40 V), A/D (4 - 20 mA) Current Measurement. D/A (±1.25, ±2.5 and ±10 Vdc), TTL I/O, Discrete I/O, Multi-mode Transceiver (RS-422 and RS-485), RTD, Synchro/Resolver to Digital or LVDT/RVDT to Digital with optional AC Reference. Each module has extensive diagnostics. Available in Air or Conduction-cooled versions. Model No. 64C1 VxWorks
Integrity A32:D16 6U

Multifunction Multifunction card will substantially increase system density by mixing up to 18 RS232 Asynchronous / Synchronous or 144 Discrete I/O channels per card. Conduction Cooled version is also available. Model No. 64D1 . . 6U

Function	Description	Software Support	ADDR/DATA Width	Size
RS-232 RS-422 RS-485	8 independent programmable intelligent synchronous (2 Mbit/s) and asynchronous (450 Kbit/s) full duplex communications channels that can individually be configured for either RS-232C, RS-422 or RS-485. Receive and Transmit buffers are each 16 kBytes. On-board processor controls each channel and is also used to communicate with host processor card. Internal loop-back test will be performed when power is applied and results will be stored in registers. I/O at front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model 64RS1	VxWorks	A32:D16	6U
RS-232 RS-422 or RS-485	This sophisticated, high-speed, DSP-based card incorporates up to 12 intelligent, full duplex communications channels that can be individually software configured for either RS-232C, RS-422 or RS-485 Synchronous or Asynchronous Communication. Model No. 64RS2	.	.	6U
RS-232 RS-422 RS-485	18 independent programmable intelligent synchronous (4 Mbit/s) and asynchronous (1 Mbit/s) full duplex communications channels that can individually be configured for either RS-232C, RS-422 or RS-485. Receive and Transmit buffers are each 32 kBytes. On-board processor controls each channel and is also used to communicate with host processor card. Internal loop-back test will be performed when power is applied and results will be stored in registers. I/O at front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model 64RS3	VxWorks	A32:D16	6U
Multifunction	VME card features a modular approach that enables the user to select a combination of functions (Up to 6 Modules). Modules include: A/D (±10v and ±40 V), A/D (4 - 20 mA) Current Measurement. D/A (±1.25, ±2.5 and ±10 Vdc), TTL I/O, Discrete I/O, Multi-mode Transceiver (RS-422 and RS-485), RTD, Synchro/Resolver to Digital or LVDT/RVDT to Digital with optional AC Reference. Each module has extensive diagnostics. Available in Air or Conduction-cooled versions. Model No. 64C1	VxWorks Integrity	A32:D16	6U
Multifunction	Multifunction card will substantially increase system density by mixing up to 18 RS232 Asynchronous / Synchronous or 144 Discrete I/O channels per card. Conduction Cooled version is also available. Model No. 64D1	.	.	6U

Motion Control Boards

Function Description Software
Support ADDR/
DATA
Width Size

Up To 16
Synchro Resolver
Measurement
Channels
w/5VA
Programmable
Reference
Supply 16 bit res. w/±1 arc min (0.017°) accuracy. Transformer isolation. 16-bit turn counters; incremental encoder (A+B) and index outputs. Hall Effect (A,B,C) commutation outputs. 50Hz to 10KHz. Tracking to 150 rps. High accuracy digital velocity outputs. Background Bit Testing continually checks performance. I/O at front panel or P2. Hot swapping capability. Commercial or MIL-SPEC versions. Model No. 64SD3 VxWorks A32:D16 6U

6 Synchro/Resolver
to Digital Channels
w/Linear DC or
Encoder Outputs
and 5VA
Reference Supply 14 or 16-bit resolution. Accuracy to ±2 arc minutes. 50Hz to 10kHz. Self test. Linear DC outputs proportional to Syn/Res angle with 0.1° accuracy and full range digital offset capability. Latch feature. Reference, signal and tracking loss detection. Power from either P1 or front panel. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 6106 . A32:D16 6U

Up To 8 Chan
Synchro/Resolver
Measurement
Up To 6 Chan
4 Synchro/Resolver
Simulation
w/Opt 5 VA
Reference
supply 16-bit resolution. Measurement accuracy ±1 arc min. Stimulus accuracy to ±30 arc sec. 50Hz to 10KHz for measurement. 360 Hz to 10 KHz. High accuracy digital velocity outputs. Transformer isolation. Background Bit testing continually checks performance. I/O at front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64CS3 VxWorks A32:D16 6U

Up to 8
Synchro/Resolver
Simulation 16-bit resolution. Accuracy to ±30 arc seconds with 1.2 VA drive. 360Hz to 10KHz. Short-circuit proof. Transformer isolation. Background Bit testing continually checks performance. I/O at either front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64DS1 VxWorks A32:D16 6U

Measurement
and
Simulation Single slot card contains two 60/400 Hz Synchro output transformers and two reference input transformers and is specifically designed to interface with VME-64DS1 and 64CS3. Model No. 64TR1-F . . 6U

3 Channel
Digital-to-Syn
Drives Torque
Receivers 5VA Drive capability to drive torque receivers. 14 bit resolution. ±6 arc minutes accuracy. 360Hz to 440Hz. Short-circuit proof outputs. Transformer isolation. Self-test. P2 I/O, Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. EK5410C-93 . A24:D166 6U

Synchro/Resolver
Measurement
and Simulation One Synchro Measurement, One Synchro Stimulus and One Control Transformer Ouput with Amplifier, Step up Transformer and Demodulator with A/D Converter. Model No. E5410C-153-1 . . 6U

Up to16 Chan
LVDT Measurement
w/5VA
Programmable
Excitation Each of the 16 ratiometric tracking inputs auto-ranges from 2.0 to 28 volts with 16-bit resolution and 0.025% FS accuracy. Each excitation input auto-ranges from 2.0 to 28 volts. Frequency range 360Hz to 10KHz. Auto phase correction to ±60° phase shifts. Transformer isolation. Background Bit testing. I/O at either front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64LD2 VxWorks A32:D16 6U

16
LVDT Outputs Each of the 16 ratiometric channels programmable from 3.0 to 28 volts with 16-bit resolution and 0.05% linearity. Frequency range 360Hz to 10KHz. Can produce differential (A+B) outputs. Short-circuit proof. Background Bit testing continually checks performance. I/O at either front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64DL1 VxWorks A32:D16 6U

PWM
Motor
Control This conduction-cooled card, incorporates 2 four-quadrant bi-directional PWM amplifiers that drive brush type motors, 5 A average, 8.5A peak with extensive diagnostics. Optional RS-422, A/D, D/A or dual R/D converters. Full diagnostics. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64PW3 VxWorks A32:D16 6U

5VA
Reference/
Excitation
Supply 5VA Reference Supply. 2.0 to 115 Vrms (360Hz to 10kHz), ±2 percent voltage tolerance, ±1 percent frequency tolerance. Single or dual supplies on one card. Front panel or P2 I/O, Commercial, Ext. Temp, Rugged, MIL-SPEC versions, Model No. 6U - 5410C-REF, 3U - 5411C-REF . . 3U
6U

Transition Card
Synchro/Resolver
Measurement
and Simulation Single-slot card contains two 60/400 Hz Synchro output transformers and two reference input transformers and is specifically designed to interface with VME-64CS1/CS3-84CSP8-57. Model No. 64TR1 . . 6U

Transition Card Transition Boards using rugged Military connectors. Model No. 64RT1 . . 6U

Function	Description	Software Support	ADDR/ DATA Width	Size
Up To 16 Synchro Resolver Measurement Channels w/5VA Programmable Reference Supply	16 bit res. w/±1 arc min (0.017°) accuracy. Transformer isolation. 16-bit turn counters; incremental encoder (A+B) and index outputs. Hall Effect (A,B,C) commutation outputs. 50Hz to 10KHz. Tracking to 150 rps. High accuracy digital velocity outputs. Background Bit Testing continually checks performance. I/O at front panel or P2. Hot swapping capability. Commercial or MIL-SPEC versions. Model No. 64SD3	VxWorks	A32:D16	6U
6 Synchro/Resolver to Digital Channels w/Linear DC or Encoder Outputs and 5VA Reference Supply	14 or 16-bit resolution. Accuracy to ±2 arc minutes. 50Hz to 10kHz. Self test. Linear DC outputs proportional to Syn/Res angle with 0.1° accuracy and full range digital offset capability. Latch feature. Reference, signal and tracking loss detection. Power from either P1 or front panel. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 6106	.	A32:D16	6U
Up To 8 Chan Synchro/Resolver Measurement Up To 6 Chan 4 Synchro/Resolver Simulation w/Opt 5 VA Reference supply	16-bit resolution. Measurement accuracy ±1 arc min. Stimulus accuracy to ±30 arc sec. 50Hz to 10KHz for measurement. 360 Hz to 10 KHz. High accuracy digital velocity outputs. Transformer isolation. Background Bit testing continually checks performance. I/O at front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64CS3	VxWorks	A32:D16	6U
Up to 8 Synchro/Resolver Simulation	16-bit resolution. Accuracy to ±30 arc seconds with 1.2 VA drive. 360Hz to 10KHz. Short-circuit proof. Transformer isolation. Background Bit testing continually checks performance. I/O at either front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64DS1	VxWorks	A32:D16	6U
Measurement and Simulation	Single slot card contains two 60/400 Hz Synchro output transformers and two reference input transformers and is specifically designed to interface with VME-64DS1 and 64CS3. Model No. 64TR1-F	.	.	6U
3 Channel Digital-to-Syn Drives Torque Receivers	5VA Drive capability to drive torque receivers. 14 bit resolution. ±6 arc minutes accuracy. 360Hz to 440Hz. Short-circuit proof outputs. Transformer isolation. Self-test. P2 I/O, Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. EK5410C-93	.	A24:D166	6U
Synchro/Resolver Measurement and Simulation	One Synchro Measurement, One Synchro Stimulus and One Control Transformer Ouput with Amplifier, Step up Transformer and Demodulator with A/D Converter. Model No. E5410C-153-1	.	.	6U
Up to16 Chan LVDT Measurement w/5VA Programmable Excitation	Each of the 16 ratiometric tracking inputs auto-ranges from 2.0 to 28 volts with 16-bit resolution and 0.025% FS accuracy. Each excitation input auto-ranges from 2.0 to 28 volts. Frequency range 360Hz to 10KHz. Auto phase correction to ±60° phase shifts. Transformer isolation. Background Bit testing. I/O at either front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64LD2	VxWorks	A32:D16	6U
16 LVDT Outputs	Each of the 16 ratiometric channels programmable from 3.0 to 28 volts with 16-bit resolution and 0.05% linearity. Frequency range 360Hz to 10KHz. Can produce differential (A+B) outputs. Short-circuit proof. Background Bit testing continually checks performance. I/O at either front panel or P2. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64DL1	VxWorks	A32:D16	6U
PWM Motor Control	This conduction-cooled card, incorporates 2 four-quadrant bi-directional PWM amplifiers that drive brush type motors, 5 A average, 8.5A peak with extensive diagnostics. Optional RS-422, A/D, D/A or dual R/D converters. Full diagnostics. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 64PW3	VxWorks	A32:D16	6U
5VA Reference/ Excitation Supply	5VA Reference Supply. 2.0 to 115 Vrms (360Hz to 10kHz), ±2 percent voltage tolerance, ±1 percent frequency tolerance. Single or dual supplies on one card. Front panel or P2 I/O, Commercial, Ext. Temp, Rugged, MIL-SPEC versions, Model No. 6U - 5410C-REF, 3U - 5411C-REF	.	.	3U 6U
Transition Card Synchro/Resolver Measurement and Simulation	Single-slot card contains two 60/400 Hz Synchro output transformers and two reference input transformers and is specifically designed to interface with VME-64CS1/CS3-84CSP8-57. Model No. 64TR1	.	.	6U
Transition Card	Transition Boards using rugged Military connectors. Model No. 64RT1	.	.	6U

Special Function Boards

Function Description Software
Support ADDR/
DATA
Width Size

6
Programmable
Resistor
Channels Up to 6 isolated programmable resistor output chan. Can be used to simulate resistive transducers (e.g. thermocouple, TAT prove, etc.). Output is always a true resistor. 12-bit resolution. Various resistance ranges and wattages are available. Wraparound self test. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 6906 6U

Function	Description	Software Support	ADDR/ DATA Width	Size
6 Programmable Resistor Channels	Up to 6 isolated programmable resistor output chan. Can be used to simulate resistive transducers (e.g. thermocouple, TAT prove, etc.). Output is always a true resistor. 12-bit resolution. Various resistance ranges and wattages are available. Wraparound self test. Commercial, Ext. Temp, Rugged, MIL-SPEC versions. Model No. 6906			6U

Power Supplies

Type Voltage/Current Description

Chassis
Mount +5V/30A,
+12V/4A
12V/4A
+3.3V/12 A 500 Watts, Ruggedized, High Power density, low profile VME/VXI power supply which accepts both 270 Vdc and a 115/230 Vac single phase input. Ideally suited for airborne, shipboard and ground mobile applications. EMI filtering to meet MIL-STD-461D, designed and manufactured Per NAVMAT Guidelines and transient protection per MIL-STD-704D. Model No. 57S81

Chassis
Mount +5/24A
+12V/5A
12V/2A
+15V/1.5A
15V/1.5A 250 watts, Ruggedized, High Power density, low profile VME/VXI power supply which accepts 115/ Vac three phase 400 Hz input. Switching Power Supply ñ Low Noise. Hold-up time 5 mS from 108 Vac input level. Inrush current 10 Amps max. Short Circuit protection - protected for continuous short circuit with automatic recovery. Model No. 56P51

VME Power
Conversion +5V/30A
+12V/4A
-12V/4A
+3.3V/30A VME and General Purpose Power Supply designed to fit within Standard 6U VME Rack. 430 Watts, 115VAC, Single Phase Input, Five Outputs. High Power, Low Profile Power Supply. Model No. 56SQ1

VME Power
Conversion +5V/65A
+12V/8A
-12V/4A
+3.3V/30A VME and General Purpose Power Supply. 600 Watts, 115VAC, Single Phase Input, Five Outputs. This High Power, Low Profile Power Supply is ideally suited for Shipboard Applications. Model No. 56ST1

VXI/VME
Power
Conversion +3.3V/15A
+5V/15A
+12V/2A
-12V/2A 28 V in DC/DC Converter. 200 Watt Quad Output. Plus 5 volt Standby supports VME and cPCI applications. Model No. 55PQ1

Pluggable
Power
Supply +5/30A
+12V/4A
-12V/4A
+3.3V/20A
+24V/2A (opt)
+28V/2A (opt) 350 Watts, Ruggedized, High Power density, low profile VME/VXI power supply which accepts 28 Vdc input. Switching Power Supply ñ Low Noise. Ideally suited for airborne, shipboard and ground mobile applications. EMI filtering to meet MIL-STD-461D, designed and manufactured Per NAVMAT Guidelines and transient protection per MIL-STD-704D. Model No. 55RQ

Type	Voltage/Current	Description
Chassis Mount	+5V/30A, +12V/4A 12V/4A +3.3V/12 A	500 Watts, Ruggedized, High Power density, low profile VME/VXI power supply which accepts both 270 Vdc and a 115/230 Vac single phase input. Ideally suited for airborne, shipboard and ground mobile applications. EMI filtering to meet MIL-STD-461D, designed and manufactured Per NAVMAT Guidelines and transient protection per MIL-STD-704D. Model No. 57S81
Chassis Mount	+5/24A +12V/5A 12V/2A +15V/1.5A 15V/1.5A	250 watts, Ruggedized, High Power density, low profile VME/VXI power supply which accepts 115/ Vac three phase 400 Hz input. Switching Power Supply ñ Low Noise. Hold-up time 5 mS from 108 Vac input level. Inrush current 10 Amps max. Short Circuit protection - protected for continuous short circuit with automatic recovery. Model No. 56P51
VME Power Conversion	+5V/30A +12V/4A -12V/4A +3.3V/30A	VME and General Purpose Power Supply designed to fit within Standard 6U VME Rack. 430 Watts, 115VAC, Single Phase Input, Five Outputs. High Power, Low Profile Power Supply. Model No. 56SQ1
VME Power Conversion	+5V/65A +12V/8A -12V/4A +3.3V/30A	VME and General Purpose Power Supply. 600 Watts, 115VAC, Single Phase Input, Five Outputs. This High Power, Low Profile Power Supply is ideally suited for Shipboard Applications. Model No. 56ST1
VXI/VME Power Conversion	+3.3V/15A +5V/15A +12V/2A -12V/2A	28 V in DC/DC Converter. 200 Watt Quad Output. Plus 5 volt Standby supports VME and cPCI applications. Model No. 55PQ1
Pluggable Power Supply	+5/30A +12V/4A -12V/4A +3.3V/20A +24V/2A (opt) +28V/2A (opt)	350 Watts, Ruggedized, High Power density, low profile VME/VXI power supply which accepts 28 Vdc input. Switching Power Supply ñ Low Noise. Ideally suited for airborne, shipboard and ground mobile applications. EMI filtering to meet MIL-STD-461D, designed and manufactured Per NAVMAT Guidelines and transient protection per MIL-STD-704D. Model No. 55RQ

PMC Mezzanine Modules

Function Description

Synchro/Resolver
Measurement PMC DSP-based card incorporates 8 single-speed or 4 dual-speed channels with extensive diagnostics. 16 bits, 1 arc-min acc., Syn/Res programmable, Input 2 - 28 Vrms auto ranging or 90 V L-L, 60 Hz to 10 KHz, programmable Bandwidth. Model No. 74SD2

Function	Description
Synchro/Resolver Measurement	PMC DSP-based card incorporates 8 single-speed or 4 dual-speed channels with extensive diagnostics. 16 bits, 1 arc-min acc., Syn/Res programmable, Input 2 - 28 Vrms auto ranging or 90 V L-L, 60 Hz to 10 KHz, programmable Bandwidth. Model No. 74SD2

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