DEV 7235 & DEV 7335 10 MHz Reference RF over Fiber Link

DEV 7235 & DEV 7335 10 MHz Reference RF over Fiber Link

The DEV 7235 and DEV 7335 10 MHz Reference RF over Fiber Link transports a stable 10 MHz reference signal over single-mode optical fiber. It is designed for satellite uplink stations, remote antenna facilities and other applications requiring reliable reference-frequency distribution to BUCs, LNBs and frequency-conversion equipment.

The link delivers 0 ±1 dB maximum gain, greater than 80 dB carrier-to-noise ratio and greater than +10 dBm output P1dB. Although described generally as a fixed-gain link, the current datasheet specifies 0-5 dB adjustable gain in the DEV 7335 receiver for output-level balancing.

Both hot-swappable modules incorporate adjustable RF sensing, front-panel status LEDs and dedicated SMA monitoring ports. Standard SC/APC and optional FC/APC or E2000/HRL optical connectors support installation in compatible indoor and outdoor DEV Optribution chassis.

Product Type: 10 MHz reference RF over fiber link
Transmitter: DEV 7235 Reference Optribution Transmitter
Receiver: DEV 7335 Reference Optribution Receiver
Frequency: 10 MHz
Maximum Link Gain: 0 ±1 dB
Receiver Gain Adjustment: 0-5 dB in 1 dB steps
Receiver Gain Accuracy: ±0.5 dB
Return Loss: Greater than 9 dB
Gain Stability: ±1 dB from 0°C to +50°C
Nominal RF Input Level: -3 dBm aggregate
Carrier-to-Noise Ratio: Greater than 80 dB
Output P1dB: Greater than +10 dBm
Harmonic Distance: 38 dBc at nominal RF input
RF Input Damage Level: +20 dBm aggregate
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

Phase Noise Performance

• 1 Hz Offset: Less than -115 dBc/Hz
• 10 Hz Offset: Less than -130 dBc/Hz
• 100 Hz Offset: Less than -140 dBc/Hz
• 1 kHz Offset: Less than -140 dBc/Hz
• 10 kHz Offset: Less than -140 dBc/Hz
• 100 kHz Offset: Less than -140 dBc/Hz
• 1 MHz Offset: Less than -140 dBc/Hz

DEV 7235 Transmitter Specifications

• Application: 10 MHz optical reference transmitter
• Laser Type: DFB
• Laser Classification: Class 1M
• Optical Output Power: 5.4 dBm
• Optical Wavelength: 1550 nm ±10 nm
• Power Requirement: 12 VDC, 200 mA
• Weight: Approximately 0.5 kg

DEV 7335 Receiver Specifications

• Application: 10 MHz optical reference receiver
• Gain Adjustment: 0-5 dB in 1 dB steps
• Optical Wavelength Range: 1100-1650 nm
• Optical Input Sensitivity: Less than -15 dBm
• Optical Input Damage Level: +10 dBm
• Power Requirement: 12 VDC, 250 mA
• Weight: Approximately 0.3 kg

RF Sensing and Monitor Ports

• RF Sensing Dynamic Range: -25 to +5 dBm
• Threshold Range: Adjustable from -25 to +5 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 20 dB
• Transmitter Monitor Level: Input level minus 25 dB ±2 dB
• Receiver Monitor Level: Output level minus 25 dB ±2 dB

Available Options

• 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

• Dedicated 10 MHz reference-signal transmission

• Designed for BUC, LNB and converter reference distribution

• Greater than 80 dB carrier-to-noise ratio

• Greater than +10 dBm output P1dB

• Low phase-noise performance

• Adjustable receiver gain for output-level balancing

• Integrated RF sensing at both ends

• Adjustable RF alarm threshold

• Front-panel signal-status LEDs

• Dedicated transmitter and receiver monitoring ports

• Single-mode optical transmission

• 1550 nm DFB optical transmitter

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

• Compact, hot-swappable modules

• Compatible with indoor and outdoor DEV Optribution chassis