DEV 7238 & DEV 7338 Advanced UHF/VHF RF over Fiber Link

DEV 7238 & DEV 7338 Advanced UHF/VHF RF over Fiber Link 

The DEV 7238 and DEV 7338 Advanced UHF/VHF RF over Fiber Link provides high-linearity analog optical transmission from 47 to 1006 MHz. Optimized for VHF, UHF and CATV-band signals, the system is suitable for broadcast facilities, remote antenna sites, cable networks and other applications requiring reliable wideband RF transport over single-mode fiber.

The DEV 7238 transmitter converts incoming RF signals to optical signals, while the DEV 7338 receiver provides adjustable gain and slope compensation to balance output levels and compensate for frequency-dependent losses. Nine wavelength choices support CWDM applications carrying multiple RF signals over a shared fiber.

Both modules incorporate adjustable RF sensing, front-panel status LEDs and dedicated SMA monitoring ports for continuous signal supervision. Their compact, hot-swappable design supports installation in compatible indoor and outdoor DEV Optribution chassis.

Product Type: Advanced analog UHF/VHF RF over fiber link
Transmitter: DEV 7238 UHF/VHF Optribution Transmitter
Receiver: DEV 7338 Advanced UHF/VHF Optribution Receiver
Frequency Range: 47-1006 MHz
Maximum Link Gain: 20 ±3 dB
Receiver Gain Adjustment: 0-15 dB in 1 dB steps
Receiver Gain Accuracy: ±0.5 dB
Receiver Slope Adjustment: 0-18 dB in 1 dB steps
Full-Band Flatness: ±1.5 dB
8 MHz Flatness: ±0.2 dB
Return Loss: Greater than 14 dB; typ. 16 dB
Gain Stability: ±2 dB from 0°C to +50°C
Group Delay Distortion: Less than 2 ns within any 8 MHz
Nominal RF Input Level: -10 dBm aggregate
RF Input Dynamic Range: -58 to +1 dBm aggregate
RF Input Damage Level: +24 dBm aggregate
Noise Figure: Less than 26 dB
Spurious-Free Dynamic Range: 110 dB/Hz⅔
Carrier-to-Noise Ratio: 64 dB
Output IP3: Greater than +22 dBm
Output P1dB: Greater than +7 dBm
Intermodulation Distortion: Greater than 60 dBc
Fiber Type: Single-mode 9/125 µm
Standard Optical Connector: SC/APC
Optional Optical Connectors: FC/APC or E2000/HRL
Module Dimensions: 20 mm W x 133 mm H x 100 mm D
Environmental Conditions: ETS 300019 Part 1-3 Class 3.1E

DEV 7238 Transmitter Specifications

• Frequency Range: 47-1006 MHz
• Laser Type: DFB
• Laser Classification: Class 1M
• Optical Output Power: 4.8 dBm
• Standard Wavelength: 1550 nm ±10 nm
• Available Wavelengths: Nine standard and CWDM selections
• Power Requirement: 15 VDC, 200 mA
• Weight: Approximately 0.5 kg

DEV 7338 Receiver Specifications

• Frequency Range: 47-1006 MHz
• Gain Adjustment: 0-15 dB in 1 dB steps
• Slope Adjustment: 0-18 dB in 1 dB steps
• Optical Wavelength Range: 1100-1650 nm
• Minimum Optical Input Level: Greater than -15 dBm
• Optical Input Damage Level: +10 dBm
• Power Requirement: 15 VDC, 200 mA
• Weight: Approximately 0.3 kg

RF Sensing and Monitor Ports

• RF Sensing: Integrated into transmitter and receiver modules
• Threshold Range: Adjustable from -50 to 0 dBm
• Threshold Repeatability: Less than 0.1 dB
• Alarm Indication: Front-panel LED and remote communication
• Monitor-Port Impedance: 50 Ohm
• Monitor-Port Connector: SMA female
• Monitor-Port Return Loss: Typ. greater than 16 dB
• Transmitter Monitor Level: Input level minus 20 dB ±2 dB
• Receiver Monitor Level: Output level minus 20 dB ±2 dB

Available Wavelengths

• 1310 nm: Lambda 0

• 1470 nm: Lambda 1

• 1490 nm: Lambda 2

• 1510 nm: Lambda 3

• 1530 nm: Lambda 4

• 1550 nm: Lambda 5, standard

• 1570 nm: Lambda 6

• 1590 nm: Lambda 7

• 1610 nm: Lambda 8

Available Options

• CWDM Wavelength Selection: Eight alternative wavelengths in addition to standard 1550 nm

• SC/APC Connector: Standard optical interface

• FC/APC Connector: Optional optical interface

• E2000/HRL Connector: Optional optical interface

• Chassis and Cabling Options: Available for compatible indoor and outdoor DEV Optribution chassis

Key Features

• Wideband RF over fiber transmission from 47 to 1006 MHz

• Optimized for VHF, UHF and CATV-band signals

• High-linearity analog optical transmission

• Adjustable receiver gain

• Up to 18 dB adjustable receiver slope

• Nine wavelength selections for CWDM applications

• Multiple RF signals over shared fiber infrastructure

• Integrated RF sensing at both ends

• Front-panel signal-status LEDs

• Dedicated transmitter and receiver monitoring ports

• SC/APC, FC/APC and E2000/HRL optical interfaces

• Compact, hot-swappable modules

• Compatible with indoor and outdoor DEV Optribution chassis

• Centralized monitoring through the selected intelligent chassis