Attachment 1 - Specifications.pdf

22 July 2026

Ruggedized Data Acquisition System (DAS)

Requirements Document for

704th Test Group/846th Test Squadron

1.0 PURPOSE

The 704th Test Group (704 TG) mission is to be the premier provider of unique test and evaluation capabilities relevant to tomorrow’s warfighter through world-class people improving technical excellence, cost-effectiveness, and agility. The 846th Test Squadron (846 TS) is one of the units assigned to the 704 TG. The 846 TS’s primary test capability is the Holloman High Speed Test Track (HHSTT) where they utilize rocket powered sled trains to simulate flight like environments and scenarios with the control and recovery of a ground-based system. In order to collect data from these systems, a robust data acquisition system is required. These tests are required for the test mission and validation of various avionics platforms, payloads, and equipment for the Department of Defense in conjunction with its partners over a number of differing rocket sled configurations. The 846 TS has purchased nine DTS Slice6 AIRs systems and requires an add-on data acquisition system that will interface directly with DTS for additional collection capability, to continually meet customer requirements.

2.0 SCOPE

The Contractor shall deliver two hardened DAS systems with the option to purchase an additional two in the future. The hardened DAS systems should meet the following requirements:

2.1 Operational requirements:

2.1.1 System Control:

2.1.1.1 DAS shall have a single controlling module capable of operating up to 6 channels of analog data

2.1.1.2 System shall be capable of communicating to a PC over ethernet at a distance of 350 feet without external aid and to a distance of 1000 feet with an ethernet extender

2.1.1.3 System shall be capable of being networked together or centralized to increase the number of analog channels

2.1.2 Data Acquisition Parameters:

2.1.2.1 For Bridge and IEPE signal conditioning, DAS must provide the following signal conditioning characteristics:

2.1.2.1.1 Bridge input range of 0 to 5 V

2.1.2.1.2 Bandwidth of DC to 50 kHz

2.1.2.1.3 Software programmable gain range of 1.0 to 1280

2.1.2.1.4 Auto offset range with 100% of effective input range at gain >2

2.1.2.1.5 Automatically calculated emulation method shunt check

2.1.2.1.6 Linearity ≤0.1% (for gain setting of 1 to 320), and ≤0.5% (for gain setting ≥640)

2.1.2.1.7 Accuracy of ≤0.5% typical

2.1.2.1.8 IEPE Singal range 0.5 to 23.5 V

2.1.2.2 DAS must contain anti-aliasing capability with the following specifications:

2.1.2.2.1 Fixed 4-pole butterworth low pass filter with 50 kHz knee frequency

2.1.2.2.2 Programmable 5-pole butterworth low pass filter, configurable between 1 Hz and 35 kHz and bypass-able for maximum bandwidth

2.1.2.3 DAS shall contain one 16-bit SAR (Successive Approximation Register) ADC per channel, with simultaneous sampling of all channels.

2.1.3 Triggers (DAS unit will provide the following triggering capability):

2.1.3.1 Triggering by means of:

2.1.3.1.1 Contact closure & TTL logic-level (active low)

2.1.3.1.2 Positive and/or negative level on any active sensor channel

2.1.3.2 Software triggering shall be available for daisy-chained systems

2.1.4 Power (DAS shall have the following power characteristics):

2.1.4.1 Operate on 9 to 30 VDC

2.1.4.2 Maximum current draw ≤ 3 W with full sensor load

2.1.4.3 Remote power control input for on/off

2.1.4.4 Reverse current and electrostatic discharge protection

2.1.5 Data Recording and Streaming:

2.1.5.1 Minimum of 16 GB of non-volatile system memory

2.1.5.2 Must include multiple data recording modes:

2.1.5.2.1 Recorder

2.1.5.2.2 Circular buffer

2.1.5.2.3 Multiple event

2.1.5.3 Maximum sample rate per channel shall be no less 400,000 samples / second

2.1.5.4 Must stream in IRIG Chapter 10 and TmNS (but not simultaneous)

2.1.5.5 Must stream no less than 20,000 samples / second

2.1.5.6 DAS shall except IRIG-B122 time source

2.1.6 Excitation (DAS unit will provide the following excitation capability):

2.1.6.1 Independently regulated channels

2.1.6.2 Supply 5 V and up to 20 mA per channel

2.1.6.3 Include short circuit protection with recovery ≥1 msec

2.1.6.4 IEPE current 5 mA per channel (24 V source)

2.1.6.5 DAS shall shut down excitation when not armed or recording

2.1.7 Hardware Interface:

2.1.7.1 DAS must directly interface with:

2.1.7.1.1 Minimum of 6 piezo-resistive or voltage input sensors

2.1.7.1.2 Minimum of 6 piezo-electric sensors

2.1.7.3 Allow for connection to multiple data acquisition systems including:

2.1.7.3.1 A minimum of 3 DTS SLICE6 Air daisy chained

2.1.7.3.2 Two additional data acquisition systems with no more than 5 meter separation

2.1.7.4 DAS shall have electronic ID interface to automatically read and determine what sensor is attached to each sensor input channel

2.1.8 Physical and Environmental:

2.1.8.1 Mounting shall be accomplished with no less than two bolts through the face of the machined case

2.1.8.2 Interfacing connectors shall be mounted on the face of the machined aluminum case

2.1.8.3 System shall not be larger than 1.65”L x 1.65”W x 0.51”H

2.1.8.4 System shall not exceed 55 grams

2.1.8.5 Operational Temperature range of -40 to 176°F

2.1.8.6 Operational Humidity of 95% RH non-condensing

2.1.8.7 Shock on all axis ± 5000 g, 0.1 msec half sine

2.1.8.8 Vibration on all axis shall meet MIL-STD-810G and MIL-STD-461G

2.1.8.9 Survival at minimum vibration of 12 grms, 3 to 2k Hz

2.2 Documentation and Support:

2.2.1 An operations manual for the unit will be provided

2.2.2 DAS control software shall be provided

3.0 MILESTONES

The contractor shall deliver two 6-channel ruggedized data acquisition systems no later than 35 days

ARO.

4.0 DELIVERABLES

The contractor shall deliver all hardware and documentation to 846 TS, Attn: Brent Kolste at 1521 Test Track Road, Holloman Air Force Base, New Mexico 88330-7850.