The Go to product viewer dialog for this item. is a specialized USB-to-3.5mm control cable designed for Icom amateur radios using the CI-V (Computer Interface Five) protocol. It acts as a bridge, allowing your computer to manage radio frequencies, logging, and remote operations through standard ham radio software. Review Summary: LD-C101 USB to CI-V Cable Chipset
Uses the CH340 USB-Serial chipset (varies by manufacturer, but typically CH340). Radio Interface 3.5mm mono CI-V plug. Compatibility
Works with most Icom radios having a "Remote" or CI-V jack (e.g., IC-718, IC-706, IC-7300, IC-7610). Best For
Casual logging, contesting, and digital modes (like FT8 via CAT control). Performance & User Experience
Users generally find these cables to be a reliable and affordable alternative to the original Icom CT-17 interface.
Software Support: It is widely compatible with major ham radio suites like Ham Radio Deluxe (HRD), N1MM Logger+, Logger32, and FLRig.
Physical Build: Many versions feature molded plugs with integrated strain relief for better durability.
Operational Note: While it handles "CAT control" (frequency and mode changes) perfectly, it does not typically pass audio or control the PTT line on its own; you'll still need an audio interface (like a SignaLink or the radio's built-in USB audio) for digital modes. Driver & Installation Guide
typically relies on the CH340 chipset, which is usually "plug-and-play" on modern Windows 10/11 systems, though manual installation is sometimes required.
The LD-C101 is a specialized USB-to-CI-V interface cable commonly used by amateur radio enthusiasts to connect Icom radios to a computer for rig control, frequency logging, and digital mode operation.
The "story" of this device is essentially one of bridging the gap between legacy analog hardware and modern digital control. The Purpose: Bridging Two Worlds
Icom’s CI-V (Computer Interface Five) is a proprietary communication protocol that allows external devices to control a radio's frequency, mode, and filter settings. While older radios used serial (RS-232) levels, modern computers rely on USB. The LD-C101 acts as the physical and logical translator:
Physical Bridge: It converts a computer’s USB port into the 3.5mm mono jack required by the radio's remote port.
Logical Bridge: Inside the cable is a serial-to-USB converter chip (often from manufacturers like FTDI or Prolific) that requires a specific driver to function. The Core Technology: Drivers & VCP
For your computer to "talk" to the radio, the LD-C101 driver creates a Virtual COM Port (VCP).
Installation: When you plug the cable in, the driver tells Windows, macOS, or Linux that this USB device should be treated as a standard serial COM port.
Recognition: Software like Ham Radio Deluxe, WSJT-X, or Omni-Rig then sends CI-V commands to that COM port.
Execution: The LD-C101 translates those digital bits into the voltage pulses the Icom radio understands. Common Troubleshooting "Plot Twists"
The most frequent issues in the LD-C101's "story" involve driver conflicts:
Counterfeit Chips: Some cheaper versions of these cables use "clone" chips. Official drivers (especially Prolific) may intentionally disable these, leading to a "Code 10" error in Device Manager.
Baud Rate Mismatch: If the software is set to 19200 baud but the radio is expecting 9600, the "conversation" between the devices will fail.
Address Conflicts: Every Icom radio has a hex address (e.g., $94 for an IC-7300). If the software isn't looking for the right address, the LD-C101 driver will be active, but the radio won't respond. Key Applications
Once the driver is correctly installed, the LD-C101 enables:
Automated Logging: Your logging software automatically records the frequency and mode of every contact.
Remote Operation: You can control your radio from across the room—or across the world—via the computer interface.
Digital Modes: Essential for operating FT8, RTTY, or PSK31 where the computer must trigger the radio to transmit.
TSW1250EVM: High-Speed LVDS Deserializer and Analysis System
The LD-C101 USB to CI-V cable is a specialized interface designed to bridge Icom amateur radios with modern computers for CAT (Computer Aided Transceiver) control. While Icom's latest rigs often feature direct USB ports, the LD-C101 is an essential tool for older models, allowing you to manage frequency, mode, and memory settings through software like Ham Radio Deluxe or WSJT-X. Essential Features of the LD-C101
The LD-C101 functions as a digital bridge, converting your computer's USB signals into the CI-V (CIV) protocol used by Icom.
Plug-and-Play Design: Typically features a standard USB-A connector on one end and a 3.5mm mono jack for the radio's CI-V port.
Virtual COM Port (VCP): The cable uses an internal chipset—often from FTDI or Silicon Labs—to appear as a standard COM port on your PC.
CAT Control Support: Enables remote operation, frequency logging, and automated satellite tracking.
Power Efficient: Powered directly via the USB bus, eliminating the need for external power supplies. Driver Installation Guide
To use the LD-C101, you must install the correct Virtual COM Port (VCP) driver before connecting the cable to your PC. Icom ic-718 setup with CI-V cable on Windows 7? - Facebook
In the fluorescent-lit haze of the third sub-basement of Kuroda Electronics, Kenji Saito sat surrounded by the digital carcasses of two decades of radio technology. His employer, a now-defunct ham radio equipment manufacturer, had left him one final project: support legacy products no one remembered.
His current nemesis? The Ld-c101 USB-to-CI-V driver. Ld-c101 Usb To Ci-v Driver
The CI-V protocol was Icom's arcane standard from the 1980s—a single-wire, asynchronous, half-duplex serial system that behaved like a sulky teenager. It worked when it wanted, dropped data when it felt ignored, and required precise timing down to the millisecond. The Ld-c101 was Kuroda’s budget attempt to let modern laptops talk to ancient Icom transceivers via USB. And it had never worked reliably.
Kenji's task: reverse-engineer the firmware, fix the driver, and produce a final update within two weeks. No source code remained. The original engineer, a woman named Hana Yoshida, had left under mysterious circumstances in 2005. Her only legacy was a cryptic comment buried in a long-dead forum: “The CI-V bus is like a queue at a rural post office. Everyone waits their turn, but some customers forget they already spoke.”
Kenji took a sip of vending-machine coffee, bitter as regret. He hooked the Ld-c101 to his logic analyzer. The USB endpoint descriptors checked out—vendor ID 0x1A86, a generic Chinese USB-to-serial chip. But the real logic was in the onboard PIC microcontroller, which translated USB bulk transfers to CI-V’s weird electrical levels.
He captured traffic between the Ld-c101 and an Icom IC-735. Every few commands, the radio would go deaf. Kenji zoomed in on the waveforms. There—a timing violation. The USB host sent a command, the Ld-c101 forwarded it to the CI-V bus, but the radio’s response came back while the Ld-c101 was still finishing its own transmission. In half-duplex land, that was chaos. The microcontroller wasn’t switching from transmit to receive mode fast enough. A classic race condition.
But fixing the PIC firmware required the original development environment. Kenji spent two days scouring old hard drives from Kuroda’s storage. Finally, in a box labeled “YOSHIDA - DO NOT DISCARD,” he found a Panasonic Toughbook running Windows 2000, with MPLAB IDE v5.0 and a parallel-port programmer.
He powered it on. The machine groaned like a waking bear. And there, on the desktop, was a folder: LD_C101_FW_SRC.
Inside, Hana’s assembly code. She had written comments in a mix of Japanese and English, often poetic. Near the timing loop, she’d scribbled: “We must delay 1.2ms after last TX bit before RX. But USB’s jitter eats our margin. Need dynamic calibration.”
Dynamic calibration. That was it.
Kenji rewrote the ISR. Instead of fixed delays, the PIC would measure the round-trip time of a dummy command at startup, then adjust its turnaround window based on the actual latency of the host USB stack. He added a small state machine to handle retries gracefully when collisions happened.
Flashed the new firmware. Plugged the Ld-c101 into his Linux laptop. dmesg showed the device. He ran minicom to the virtual serial port, typed 0xFE 0xFE 0x94 0xE0 0x03 0xFD—the CI-V command to read frequency.
The IC-735 replied: 0xFE 0xFE 0x94 0xE0 0x01 0x01 0x2D 0x40 0x00 0xFD.
14.240 MHz. Perfect.
Kenji repeated the command one hundred times in a script. Every response arrived intact. No bus deafness. No dropped bytes.
He leaned back, the chair squeaking in the silence. Somewhere, Hana Yoshida might be smiling.
Two weeks later, he uploaded the final driver and firmware patch to Kuroda’s archived FTP site, with a note: “Works on Windows 98 through Windows 11, and any Linux kernel 2.6+. CI-V timing now self-calibrates on each connection. The post office queue now has a patient clerk.”
He never heard from a single user. But that was fine. In the world of legacy hardware, a perfect driver is like a tree falling in an empty forest—it makes no sound, but the forest stays upright.
Kenji shut off the sub-basement lights for the last time. Somewhere out there, a ham operator in a storm, connecting an old Icom to a cheap USB cable, would never know why their radio suddenly worked perfectly. They’d just call it luck.
And that, Kenji thought, was the highest praise a driver could receive.
The story of the LD-C101 USB to CI-V Driver is a classic tale of high-stakes amateur radio engineering, where a simple $10 cable becomes the only thing standing between a modern computer and a vintage multi-thousand-dollar transceiver. The Protagonist: The IC-V Protocol The story begins in with Icom’s Computer Interface V (
) protocol. Designed long before USB existed, CI-V used a simple 3.5mm mono jack to transmit and receive data on a single wire. It was revolutionary, allowing operators to control their radios—changing frequencies, modes, and filters—directly from a computer terminal. The Conflict: The Great Port Vanishing
As the 2000s progressed, the serial ports (RS-232) that spoke the CI-V language vanished from laptops. Ham operators were left with a "communication gap." Enter the
, an aftermarket USB-to-CI-V "bridge" designed to translate modern USB signals back into the archaic logic levels of a 1990s Icom rig. The Deep Story of the Driver The "soul" of the LD-C101 is its CH340 chipset
. While many premium cables use expensive FTDI chips, the LD-C101 often utilizes the CH340, a workhorse serial-to-USB converter known for:
is a USB-to-3.5mm CI-V control cable designed for computer control of ICOM radios. To function correctly, the cable requires specific Virtual COM Port (VCP)
drivers to translate the USB signal into a serial communication line that radio software can understand. Chelegance Driver Specifications & Requirements Most modern LD-C101 cables utilize the FTDI (Future Technology Devices International)
chipset, though some variants may use Silicon Labs (SiLabs) or Prolific chips. Chipset Identification
: When plugged into a Windows computer, the cable typically appears in Device Manager under "Ports (COM & LPT)" as a "USB Serial Port". Official FTDI Drivers
: Because it acts as a standard serial interface, the latest stable drivers are generally sourced from the FTDI Chip VCP Drivers page Compatibility : Supports Windows 7, 8, 10, and 11.
: Drivers are often built into the Linux kernel (version 2.4.20 or greater). : Requires FTDI VCP drivers for Mac. Chelegance Hardware & Technical Profile
The LD-C101 serves as a replacement for the Icom CT-17 level converter, providing a direct link between a PC's USB port and a radio's CI-V jack. Chelegance Specification USB-A to 3.5mm Mono Plug Cable Length 1.5 meters (approx. 5 feet) Icom CI-V (TTL Level Serial) Typically 9600 or 19200 (Software dependent) Compatible Software Ham Radio Deluxe, N1MM, Logger32, WSJT-X Installation and Setup
The LD-C101 USB to CI-V cable is a specialized interface used by amateur radio enthusiasts to connect Icom transceivers to a computer for Computer-Aided Transceiver (CAT) control. This single-cable solution replaces the traditional, multi-component Icom CT-17 level converter setup, allowing you to manage frequency, mode, and filter settings directly through software like Ham Radio Deluxe or WSJT-X. Understanding the LD-C101 Interface
The LD-C101 acts as a bridge between your PC's USB port and the 3.5mm CI-V remote jack on your radio. CI-V Cable - IC706 - Groups.io
The Go to product viewer dialog for this item. is a specialized USB-to-CI-V control cable designed specifically for Icom amateur radios. It acts as a bridge, allowing your computer to communicate with the radio for frequency control, logging, and remote management through popular ham radio software. Technical Specifications
The cable replaces the older Icom CT-17 level converter by integrating a USB-to-serial chipset directly into the cable. Chipset: Utilizes the CH340 USB-Serial chipset. Radio Connector: 3.5mm mono CI-V plug. PC Connector: Standard USB-A plug. Cable Length: Standard 1.5 meters (~5 feet).
System Compatibility: Supports Windows XP through Windows 11. Driver Installation Guide Because the The Go to product viewer dialog for this item
uses the CH340 chipset, you must install the corresponding CH340 driver for your computer to recognize it as a COM port.
The LD-C101 USB to CI-V driver is a software component that enables communication between a computer and certain devices, such as amateur radio transceivers, that use the CI-V (Controller Interface V) protocol. This protocol is commonly used in amateur radio equipment to allow for remote control and data transfer.
The LD-C101 is a specific USB interface cable designed for this purpose, and its driver software allows the computer to recognize and interact with the device.
Here are some key points about the LD-C101 USB to CI-V driver:
If you're looking for more information or need to download the driver, I recommend checking the manufacturer's website or searching for the specific driver version compatible with your operating system.
The LD-C101 is a specialized USB-to-CI-V CAT interface cable used primarily by amateur radio operators to connect Icom transceivers to a PC for rig control and frequency logging. This cable functions as a virtual COM port, translating USB signals into the CI-V (Icom Communication Interface V) protocol. 1. Identify Your Chipset
The LD-C101 typically uses one of two common USB-to-Serial chipsets. Identifying yours is critical for choosing the correct driver:
SiLabs (Silicon Labs) CP210x: Common in standard LD-C101 models. It appears as "Silicon Labs CP210x USB to UART Bridge" in Device Manager.
FTDI FT232RL: Often found in "premium" or older versions. It appears as "USB Serial Port" or requires the "FTDI VCP" driver. 2. Driver Download & Installation
Important: Install the driver before plugging the cable into your computer.
For SiLabs Chipsets: Download the latest VCP (Virtual COM Port) drivers directly from the Silicon Labs Support Page.
For FTDI Chipsets: Download the "VCP Drivers" from the FTDI Chip Website.
Alternative: Many Icom-specific cables can also use the official Icom USB Driver which supports Windows 10 and 11. USB Cable Drivers FTDI / Prolific / SiLabs / WCH - Miklor
Ld-c101 Usb To Ci-v Driver: A Comprehensive Guide
The LD-C101 USB to CI-V driver is a crucial software component that enables communication between a computer and a device that uses the CI-V (Controller Interface-V) protocol. This protocol is commonly used in various applications, including amateur radio, industrial control, and medical devices. In this article, we will explore the LD-C101 USB to CI-V driver in-depth, discussing its features, installation, and troubleshooting.
What is the LD-C101 USB to CI-V Driver?
The LD-C101 USB to CI-V driver is a software driver that allows a computer to communicate with a device that uses the CI-V protocol over a USB connection. The driver acts as a bridge between the computer's operating system and the device, enabling the exchange of data and commands. The LD-C101 is a specific model of USB to CI-V converter, and the driver is designed to work with this device.
Features of the LD-C101 USB to CI-V Driver
The LD-C101 USB to CI-V driver offers several key features that make it a reliable and efficient solution for CI-V communication:
Installation of the LD-C101 USB to CI-V Driver
Installing the LD-C101 USB to CI-V driver is a straightforward process. Here are the general steps:
Troubleshooting Common Issues
While the LD-C101 USB to CI-V driver is generally reliable, issues can arise. Here are some common problems and their solutions:
Applications of the LD-C101 USB to CI-V Driver
The LD-C101 USB to CI-V driver has various applications across different industries:
Conclusion
In conclusion, the LD-C101 USB to CI-V driver is a crucial software component that enables communication between a computer and a device that uses the CI-V protocol. The driver offers several key features, including compatibility, high-speed data transfer, and easy installation. By understanding the features, installation, and troubleshooting of the LD-C101 USB to CI-V driver, users can effectively utilize this technology in various applications.
FAQs
Here are some frequently asked questions about the LD-C101 USB to CI-V driver:
Resources
For more information about the LD-C101 USB to CI-V driver, users can refer to the following resources:
Title: Bridging the Gap: A Comprehensive Analysis of the LD-C101 USB to CI-V Driver
Introduction
In the realm of amateur radio, the intersection of legacy hardware and modern computing presents a unique set of challenges. For decades, manufacturers like Icom have utilized the CI-V (Computer Interface 5V) protocol to facilitate communication between transceivers and external controllers. While the protocol itself has stood the test of time, the hardware interfaces required to connect these radios to modern computers have undergone significant evolution. The shift from parallel ports and RS-232 serial connections to Universal Serial Bus (USB) necessitated the development of reliable interface adapters. Among these, the LD-C101 USB to CI-V driver interface has emerged as a noteworthy solution. This essay explores the technical specifications, operational functionality, installation procedures, and the overall significance of the LD-C101 in the modern amateur radio shack.
Understanding the CI-V Protocol and the USB Necessity Compatibility : The driver is typically compatible with
To appreciate the function of the LD-C101, one must first understand the interface it bridges. Icom’s CI-V protocol is a proprietary bus format that allows for the remote control of transceivers. It enables operators to adjust frequency, mode, filter settings, and other parameters via software. Historically, this was achieved through DB-9 serial ports. However, as modern laptops and desktops phased out physical serial ports in favor of USB, operators were forced to rely on cumbersome setups involving USB-to-Serial adapters combined with separate CI-V level converters.
The LD-C101 simplifies this topology. It is an integrated circuit solution that directly converts USB signals to the CI-V logic levels required by Icom radios. This "direct" approach reduces cable clutter and eliminates potential points of failure associated with chaining multiple adapters together.
Technical Architecture and Design
The LD-C101 typically utilizes a bridge controller chip—commonly the CH340 or the Silicon Labs CP210x series—to handle the USB-to-UART (Universal Asynchronous Receiver-Transmitter) conversion. This is coupled with a level shifter or a transistor-based circuit that adapts the UART's logic levels to the open-collector style signaling used by the CI-V bus.
Physically, the LD-C101 is generally packaged as a compact dongle or a small internal PCB (Printed Circuit Board). It features a USB Type-A or Type-B connector on the computer side and a 3.5mm stereo jack or a dedicated header on the radio side. The design is powered entirely by the USB bus, drawing approximately 5 volts from the host computer, which eliminates the need for external power supplies. Its compact form factor makes it highly portable, a critical feature for field operations and portable stations.
Driver Installation and Software Compatibility
The term "driver" in the context of the LD-C101 is somewhat dual-natured; it refers to both the physical hardware interface and the software driver required by the operating system. When the device is plugged into a Windows, macOS, or Linux machine, it enumerates as a virtual COM port.
For Windows operating systems, the installation process requires the user to install drivers specific to the bridge chip used in the device (usually provided by the manufacturer or downloadable via Windows Update). Once installed, the device appears to software applications as a standard serial port (e.g., COM3, COM4).
This virtualization is crucial for software compatibility. Virtually all amateur radio software—such as Ham Radio Deluxe, N1MM Logger, WSJT-X, and Fldigi—is designed to communicate via serial ports. The LD-C101 acts as a transparent bridge; the software sends standard serial commands to the virtual COM port, and the hardware translates these into CI-V voltage levels that the Icom radio can understand. This ensures that the LD-C101 is compatible with a wide array of radios, from the vintage IC-735 to the modern IC-7300 and IC-7610.
Operational Performance and Advantages
The primary advantage of the LD-C101 is its reliability in signal integrity. Unlike cheaper "homebrew" interfaces that may suffer from voltage inconsistencies, the LD-C101 provides a stable interface that adheres to the voltage thresholds expected by Icom radios. This stability is vital for remote operation, where dropped packets or communication errors can disrupt logging or contesting operations.
Furthermore, the LD-C101 often features galvanic isolation in higher-end iterations or can be easily modified to include it. Isolation protects the computer and the radio from ground loops and voltage spikes, which are common hazards in radio environments involving different power sources.
Another significant advantage is the auto-baud rate detection or the wide range of supported baud rates. Icom radios can be set to various communication speeds (typically 9600 or 19200 baud). The LD-C101 is capable of operating at these speeds without data corruption, allowing for faster frequency changes and smoother spectrum displays in software control applications.
Comparison with Market Alternatives
When compared to the official Icom CT-17 interface, the LD-C101 offers a distinct advantage in terms of cost and size. The CT-17 is a robust but relatively large box that has been discontinued by many retailers, often fetching high prices on the used market. In contrast, the LD-C101 is an affordable, modern alternative that fits in a pocket.
Compared to the RT Systems USB interface cables, the LD-C101 is often favored by operators who prefer "open" software solutions. While RT Systems cables are excellent for their specific software, they are sometimes locked to that ecosystem. The LD-C101, acting as a standard virtual COM port, works with any software that supports CAT (Computer Aided Transceiver) control for Icom radios.
Conclusion
The
The is a USB to CI-V control cable primarily used to interface Icom amateur radio equipment with a computer for rig control and frequency management. This interface serves as a bridge, allowing software to send and receive commands via the Icom Communications Interface V (CI-V) protocol. Driver and Chipset Details The functionality of the depends on the specific internal chipset used in the cable: CH340 Chipset: Most standard versions of the
use the USB-Serial CH340 chipset. For these, you must install the CH340 USB-to-Serial driver to create a Virtual COM Port on your PC.
FTDI Chipset: High-end variants may use an FTDI FT232RL chip, which often provides better stability across different operating systems like Windows, macOS, and Linux. Drivers for these are typically available on the FTDI Chip website.
Plug-and-Play: Once the appropriate driver is installed, the cable should be recognized as a standard serial port, requiring no additional firmware programming. Technical Specifications Interface: USB (Type A) to 3.5mm mono jack. Cable Length: Typically 1.5 meters (approx. 5 feet).
Functionality: Supports data transfer rates from 300 baud to 3 Mbaud and handles CI-V commands for frequency and mode control.
Software Compatibility: Fully compatible with major ham radio suites including Ham Radio Deluxe, N1MM, Logger32, FLRig, and Fldigi. Compatible Radios The
works with nearly any Icom radio equipped with a "Remote" or "CI-V" jack, including:
A useful summary paper from the Ham Radio .ru and eHam.net communities:
067B:2303 (Prolific) or 10C4:EA60 (Silicon Labs).brltty conflict fix (sudo apt remove brltty).A: No. CDs contain outdated, often malware-ridden drivers. Always download fresh.
After the LD-C101 USB to CI-V driver is installed, hardware configuration is necessary. The LD-C101 is not plug-and-play regarding radio settings.
But here is where the piece deepens into tragedy: the LD-C101 has no identity of its own. It is a chameleon that has forgotten its face. It relies entirely on a driver to tell the operating system what it is. And the driver—that tiny piece of kernel-level software—becomes the abyss into which weekends disappear.
You install the driver. Windows recognizes “USB Serial Port (COM5).” You open your logging software, select COM5, set the baud rate to 19,200 (or 9,600, or 57,600 depending on the radio’s mood). You click “Test.” Silence. No frequency readout. No response. The red TX light on the LD-C101 flickers once in mockery, then goes dark.
The problem is never the hardware. The hardware is dumb and honest. The problem is the collision of expectations. The CI-V protocol demands a half-duplex bus. The USB driver expects full-duplex. The CI-V bus requires pull-up resistors. The FTDI chip wants to push. And deep in the registry of your machine, a ghost parameter from a driver installed three years ago for a different radio is still asserting control over COM5.
You begin to doubt. You check the cable. You check the solder joints on the LD-C101’s miniature PCB. You find a forum post from 2014 in Russian, Google-translated to cryptic poetry: “Set RTS high or low. No, other way. Ground pin 7. No, pin 5. Use 3.5mm plug, not 2.5mm. Pray to Kenwood.”
Look at the small circuit board inside the USB plug (if transparent) or search online for your seller’s listing. Common markings:
A: Yes, if the cable uses the same bridge chip. Many generic "USB to CI-V for Icom" cables use CP2102.