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Description
Meridian Technologies ST-2A-1 Fiber Transmission System (Transmitter)Transmitter Multimode Fiber Unidirectional Audio Hot Swappable The ST 2A 1 Fiber Transmission System (Transmitter) from Meridian Technologies incorporates an all digital encoding technology that supports two unidirectional audio channels over one optical fiber. This model uses multimode fiber. It is well suited for use in intelligent transportation systems, security & surveillance work, access control, among many other applications and settings. Local
- Transmitter
- Multimode Fiber
- Unidirectional Audio
- Hot-Swappable
The ST-2A-1 Fiber Transmission System (Transmitter) from Meridian Technologies incorporates an all-digital encoding technology that supports two unidirectional audio channels over one optical fiber. This model uses multimode fiber. It is well suited for use in intelligent transportation systems, security & surveillance work, access control, among many other applications and settings.
Local indicators provide a visual indication of the status of each audio channel. 3-pin terminal blocks are used for connection of the audio channel interfaces. This series is also compatible with Meridian's SpectraSmart Network management and diagnostic PC-based system.
The DigiSlim product family is available as rack mount cards and modules that can be installed in any of Meridian's desk chassis or in 19" racking frames. This system can be configured in either star (module to rack) or trunking (rack to rack) configurations. These systems can be transformed in to a standalone module by using SR-500/S (standard configuration) or SR-1000/S frames.
- The device supports unidirectional audio
- This model is a laser-based system that uses multimode fiber
- This model uses ST fiber connectors
- It features 24-bit native digital encoding
- It uses Surface Mount Technology (SMT) for high reliability and repeatability
- This solution is designed to be reliable and repeatable
- Local LED indicators provide visual cues for system status
- System diagnostics are available for performance parameters
- The card is hot-swappable
- The laser features biased photo-detector circuitry for stable optical output over the full temperature range
- It meets NEMA TS1/TS2 and CALTRANS specifications
- It uses internal switching power supplies
- Automatically resettable solid-state current limiters are included on all power lines to provide equipment protection
- A wide optical dynamic range means optical attenuators are never needed
- Screw terminals are available for audio
In the Box
Meridian Technologies ST-2A-1 Fiber Transmission System (Transmitter)
- Ten-Year Warranty Against Defects in Material & Workmanship (from Original Date of Shipment)
| Audio | I/O Impedance: 600 Ohm (Balanced), 47 kOhm (Unbalanced) Frequency Response: 10Hz to 20KHz SNR: >90dB (Weighted) @ 1KHz In/Out Level: -8 to +8dBm (4Vp-p max.) Total Harmonic Distortion: <0.01% @ 1KHz Resolution: 24 Bi |
| Optical | Fiber Type/Size (um): Multimode (FP Laser) 9/125 Optical Output (dBm): -5 Receiver Sensitivity (dBm): -26 Optical Budget (dB): 21 Wavelength (nm): 1300/850 Optical Connector: ST Optical Dynamic Range (dB): 24 Fiber Data Rate: 250Mbps |
| Connectors | Video: 75 Ohm BNC (Gold Center Pin) Optical: ST Audio/Contact Closures: 14-pin Screw Terminals |
| Indicators | (1) Green: Power On (1) Bi-Color: TX Carrier/ Laser Over Current (1) Bi-Color: RX Carrier - Present / Error (1) Bi-Color: Audio Present / Overmodulation |
| Life | >170,000 hours @ Ground Fix 35C degrees per MIL217F |
| Power | 6W |
| Dimensions (HxWxD) | 0.8 x 6.5 x 5" (20 x 160 x 127mm) (1) slot |
| Weight | 1 lbs (0.45kg) |
| Packaging Info | |
|---|---|
| Package Weight | 1.5 lb |
| Box Dimensions (LxWxH) | 10.0 x 7.0 x 3.0" |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.9 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Foam Mattress NEEDs Foam Pillows
Color: Blue-ice Plus, Size: King(Pack of 2), Color: Blue-ice Plus, Size: King(Pack of 2)
10 stars!! Quality foam, structure & price. Best bang for my buck.
HRV, readiness & total sleep score metrics increased drastically this week. See screenshot :)
Support:
Molds and cushions every crevice under my neck and above shoulders. So comfy
Size:
Adjustable loft but king length is perfect to hug and rest your head. Love love love. The 1st 2 nights were uncomfortable with pillow as is, first night I was up at 3am half asleep pulling foam out but wasn't enough. The second night at 2am I pulled out more stuffing. I was getting frustrated.. my Oura ring showed both nights I was awake every hour. Not good. Before the 3rd night I pulled enough to fill the bag the 2 pillows arrived in. Boom -8hrs sleep and for the first time ii years I achieved 17% Deep sleep. Huge.
Weight:
Perfect weight with adjustment. Squishy and molds to b the contour of my neck and shoulders
Softness:
Like the baby bear.. just right.
Comfort:
Very comfortable after removing 30% foam in both pillows. I actually now have enough to make a 3rd pillow, replace old foam, or adjust OGs, Still to early to measure.
If you have a foam mattress that contours your body but not your head you'll end up with neck and/or back pain from head being elevated- not sinking/molding the body into a foam mattress.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 1, 2025
★★★★★ 3
These are not sized correctly - beware
Color: Blue-ice Plus, Size: King(Pack of 2), Color: Blue-ice Plus, Size: King(Pack of 2)
Edit: I was going to return these pillows but the seller contacted me and offered a full refund due to the size issue without having to send the pillows back.
I am happy with this and happy to keep them on a spare queen size bed as they really are nice pillows. Just the wrong size.
pros: they are a nice pillow and the cooling feature is really great, and you can adjust to your liking
cons: absolutely wrong size. Ordered King, tag says king, all measurements on listing and tag say 20x36, in reality they are more like 20x30. Definitely Queen pillows being sold as King.
I did not see any reviews at first about size issues but after I got these and did a search it does look like others have had the same problem.
A shame, would have given them a great review if they were the correct size
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Reviewed in the United States on February 23, 2026
★★★★★ 5
Cool and comfy
Color: Blue-ice Plus, Size: King(Pack of 1)
Great pillow. Keeps you cool.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026
★★★★★ 5
Really Good Cooling Pillows for Sleeping
Color: Blue-ice Plus, Size: Queen(Pack of 2), Color: Blue-ice Plus, Size: Queen(Pack of 2)
These cooling pillows are very soft and provide excellent support for your head and neck. They are adjustable by taking our the stuffing if you need them to be more flat or less firm. The look great and comes in a pack of two which is a great value. During use, I did notice they have great shape retention and it does not take them long to return to their fluffy full shape. I am a hot sleeper and these do keep your head cool - just be aware using a pillow cover does reduce the cool ability but this allows you to adjust for weather like during winters to add a pillow case for extra warmth. Very happy with this purchase and got a second set to replace my old pillows.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Sleek shear soft cool zippered pillow cases
Color: 07 - Green, Size: Queen (20" X 30")
I'm a huge fan of bamboo fabric. It feels great to wear and so it also feels good to sleep on, especially during hot and or humid spells. Pillowcases came in a pack of 2 and were well packaged and arrived undamaged. Shipping was very fast.
Cases appear to be well made. they are a lovely soft green which is perfect for a restful bedroom setup. As expected the fabric is soft and relaxing against the skin, it seems to retain a cooler feel than cotton.Bamboo tends to be a thinner fabric that is light and once damp, dries pretty quickly. Perfect for folks who run hot normally and need extra cooling during the summer or people who sweat at nigh. Cases are zippered and zippers worked well and appear nicely sewn in and decent quality. At night, slept very well. I think this is a good product and like the price point a lo. Will be looking to get another set very soon!
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Reviewed in the United States on August 7, 2025
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