3dbm Inc 70MDF-GLW FM Modulator Tone BNC RF Output Calibrate Equalize

3dbm Inc 70MDF-GLW FM Modulator Tone BNC RF Output Calibrate Equalize

The 3dbm Inc 70MDF-GLW is a self-contained FM modulator designed for precision RF signal generation and calibration applications. The front panel provides direct status monitoring via labeled green and red LED indicators — including AC ON, FAULT, Operate/Equalized, and Calibrate/Linear states — along with dedicated BNC monitor ports for both Tone and RF signals. Two pushbuttons select between OPERATE/CALIBRATE and EQUALIZE/LINEAR operating modes, giving the operator straightforward control over the modulator's function state.

Specifications & What's Included

• Manufacturer: 3dbm Inc
• Model: 70MDF-GLW
• Type: FM Modulator
• Form factor: Benchtop / rack-mountable module in brushed aluminum enclosure
• Front panel — BNC Tone Monitor connector
• Front panel — BNC RF Monitor connector
• Front panel — OPERATE/CALIBRATE pushbutton selector
• Front panel — EQUALIZE/LINEAR pushbutton selector
• Front panel — AC ON (green LED), FAULT (red LED), and four mode-status green LEDs
• Rear panel — J1: BNC Tone Input
• Rear panel — J2: BNC Main RF Output
• Rear panel — J3: BNC Range Calibration RF Output
• Rear panel — J6: IEC AC mains input with fuse pull holder
• Rear panel — AC ON / AC OFF rocker power switch with red indicator
• Rear panel — J4: DB9 connector (green)
• Rear panel — J5: DB9 connector (green)
• Rear panel — 3.5mm audio jack between J4 and J5
• Unit only — no external cables included

Applications

FM modulators of this type are used in broadcast transmission, telecommunications test systems, and RF range calibration setups where a stable, adjustable FM-modulated carrier is required. The 70MDF-GLW's dedicated Range Calibration RF Output and built-in Equalize/Linear mode make it suited for range or link-calibration environments — such as those found in aerospace ground support, RF test ranges, and instrumentation systems — where an operator needs to switch between a normal operating state and a calibration reference state quickly. The separate Tone Input and RF Output BNC ports allow it to be inserted into a signal chain as a modulator stage, while the DB9 serial connectors suggest provision for remote control or status monitoring. 3dbm Inc produced specialized RF and signal conditioning modules primarily for military, aerospace, and high-reliability commercial applications.