Ascent Communication Technology

AST2500 Fiber Satellite CWDM Optical Transmitter

Ascent’s AST2500 series is a compact fiber satellite and DTT optical transmitter suitable for satellite optical distribution network systems. The device receives the signal from 4 optical LNBs and distributes it over a single optical fiber, to the different users, using the CWDM transmission wavelength.

• Designed for Satellite Optical Systems

• Wide operating frequency range: 47 MHz to 860 MHz / 950 MHz to 2150 MHz

• Excellent Linearity and flatness

• Single-mode fiber high return loss

• Build-in GaAs amplifier active devices

• Ultralow noise technology

• Build-in CWDM, using DFB coaxial small package laser

• Outputs 13/18V, 0/22 kHz to LNB working

• A LNB mode switch offers the possibility to use either Quattro or QUAD LNB

• Red LED for power indication

• Small size and easy installation

Item	Description	Note
Customer Interface
RF Connector	F‑female
Optical Connector	SC/APC
Power Supply	F‑female
Optical Parameter
Optical Return Loss	≥45 dB
Output Optical Wavelength	1510 nm	LV‑TX
	1530 nm	LH‑TX
	1550 nm	HV+Terr.‑TX
	1570 nm	HH‑TX
Output Optical Power	3 mW	≥5dBm
Optical Fiber Type	Single‑mode fiber
Terr.+SAT‑IF Parameter
Input Impedance	75 Ω
Terr. Frequency Range	47 MHz to 860 MHz
Terr. Flatness	±0.75 dB
Terr. Input Level	75 dBµV ± 5 dBµV
Terr. Return Loss	≥14 dB
CNR	≥52 dB
CSO	≥62 dB
CTB	≥65 dB
SAT‑IF Frequency Range	950 MHz to 2150 MHz
SAT‑IF Return Loss	≥10 dB
SAT‑IF Flatness	±1.5 dB
SAT‑IF Input Level	70 dBµV ± 5 dBµV
LNB Power supply	13 V / 18 V
LNB power supply current	500 mA (max.)
22 kHz Accuracy	22 kHz ± 4 kHz
Other Parameter
Power Supply	20 V_DC
Power Consumption	<10 W
Dimensions	195 mm × 128 mm × 40 mm