Ascent ASR2500 User manual

ASR2500 and
AST2500 SAT-IF
CWDM Optical
Transmitter and
Receiver
Quick Reference
Guide
Revision B

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 2 of 13
ASR2500 and AST2500 SAT-IF CWDM Optical Transmitter and Receiver
Quick Reference Guide
ACT Document Number: ACT ASR2500 and AST2500 SAT-IF CWDM Optical Transmitter and Receiver QRG
Quick Reference Guide Revision B
Copyright © 2020 Ascent Communication Technology Limited.
All rights reserved. Reproduction in any manner whatsoever without the express written permission of Ascent
Communication Technology is strictly forbidden.
This document is produced to assist professional and properly trained personnel with installation and maintenance
issues for the product. The capabilities, system requirements and/or compatibility with third-party products
described herein are subject to change without notice.
For more information, contact ACT: [e-mail]
Revision History
Revision
Date
Reason for Change
A
02/03/2020
Initial release
B
02/16/2020
Minor updates

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 3 of 13
Table of Contents
Precautions ............................................................................................................................... 4
1. Features................................................................................................................................. 5
2. Product Description .............................................................................................................. 5
3. Product Installation and Testing............................................................................................ 7
4. Technical Specifications......................................................................................................... 8
5. Package ............................................................................................................................... 10
6. Trouble Shooting................................................................................................................. 10
7. Applications......................................................................................................................... 11

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 4 of 13
Warning
Invisible laser radiation is emitted from the end of fiber or connector. Avoid direct exposure to
beam.
Aerial System Earth Connection
The equipment must be connected to the ground electrode of the antenna installation.
Safety Warnings
The product must be installed by a qualified engineer, according to the
local safety standards and regulations.
Caution
The equipment works on optical transmission network system in high power non- visible light
source. Keep people away from source to avoid burning skin and damage on eyes.
Only trained and authorized personnel can open the product. In case of failure, do not try to
repair the product.
Installation Warnings
1. When installing with transmitter make sure that all power is switched off. Only using the original
power cable (adaptor) supplied and installing the products so that the mains plug is easily
accessible.
2. To fix the product to the wall use suitable expansion bolts and be easy to connect optical cable,
coaxial cable and power cable. Keeping sufficient spaces for fiber cable to avoid excessive bending
radius of fiber cable, resulting in excessive optical loss.
3. The products must not be exposed to dripping or splashing liquids and so must be installed
indoors in a dry place. Don't install the product above or close to heat sources.
4. Humidity and condensation could damage the products. In case of condensation, wait until the
product is dry before using it.
5. Put on cap on optical connector when equipment not to be used to avoid physical damage.
6. Clean the optical connector with high purity alcohol for the first time and long-time preservation.
Waiting for the alcohol to evaporate, otherwise cause pollution of the equipment fiber optic
interface, resulting in excessive optical loss.

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 5 of 13
 Designed for Satellite Optical System
 Wide operating frequency range:47-860MHz/950-2150MHz
 Excellent Linearity and flatness
 Single-mode fiber high return loss
 Using GaAs amplifier active devices
 Ultralow noise technology
 Build-in CWDM, Using DFB coaxial small package laser (Transmitter)
 Outputs 13/18V, 0/22KHz to LNB working (Transmitter)
 A LNB mode switch offers the possibility to use either Quattro or
 QUAD LNB (Transmitter)
 Build-in CWDM, Using High linear PD (Receiver)
 Build-in optical AGC function with MCU (Receiver)
 Outputs connected to the 5 IN series satellite multiswitch (Receiver)
 RED-LED for power supply indication
 Smaller size and easier installation

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 6 of 13

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 7 of 13
Note
Installing and removing the equipment when it stops working.
Pre-installation instructions:
User note: optical fiber, SC/APC adjustors, SC/APC connectors, SC/PC connectors
Picture1: optical fiber. Suggested Bending radius bigger than 30mm. (Bending radius: a very
small section of the curve with a circular arc that the radius of the circle formed by the arc is
the radius of curvature. See as picture 1. Bending radius for Circle 1 bigger than Circle 2)
Picture2: optical fiber adaptor & protective cap
Picture3: optical fiber connector & protective cap
Picture4: Connector in green color for SC/APC, connector in blue color
for SC/PC
Installation instructions:
The transmitter can be wall mounted using the brackets that are incorporated in the product
mechanics. The space is provided for connecting the power lead and for correct ventilation of
the product.
Keeping sufficient space for fiber cable to avoid excessive bending radius of fiber cable,
resulting in excessive optical loss.
Connecting and disconnecting the fiber to transmitter (picture 1-3 below)

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 8 of 13
Testing Installation
Note
Observe the following on testing after transmitter installation
to avoid damage to the human body or equipment
The equipment works on optical transmission network system in high power non- visible light
source. Keep people away from source to avoid burning skin and damage on eyes.
Clean the optical connector with high purity alcohol, waiting for the alcohol to evaporate,
Otherwise cause pollution of the equipment fiber optic interface, resulting in excessive optical
loss.
A direct optical connection cannot be made between the optical transmitter and receiver. The
connection can only be made using optical attenuators as the overall input power to the
optical receiver with the range.
Input 59 CH analog modulation signal 75dBuV/CH or digital modulation signal 68 dBµV/MHz,
according to technical specification
Optical Transmitter
Item
Description
Note
Customer Interface
RF Connector
F-female
5 (4SAT+1TERR)
Optical Connector
SC/APC or FC/APC
Power Supply
F-female
Optical Parameters
Optical Output Power
4x3 dBm
2mW
Optical Return Loss
≥45 dB
Output Wavelength
1510 nm to 1570 nm
CWDM
Optical Fiber Type
Single-mode
RF Parameters
Input Impedance
75 Ω
TERR Frequency Range
47 MHz to 860 MHz
TERR Flatness
±0.75 dB
TERR Input Level
75 dBµV/ch ±10 dBµV/ch
59ch
TERR Return Loss
≥12 dB
CNR
≥52 dB
CSO
≥60 dB
CTB
≥63 dB
SAT Frequency Range
950 MHz to 2150 MHz
SAT Flatness
±1.5 dB
SAT Input Level
68 dBmV/ch ± 10 dBmV/ch
SAT Return Loss
≥10 dB

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 9 of 13
LNB Power Supply
13/18 VDC
LNB Power Supply Current
300 mA max.
each SAT port
22 kHz Accuracy
22 kHz ± 4 kHz
Other Parameters
Power Supply
20 VDC 2500 mA
Power Consumption
<8 W
Dimensions
195 mm × 135 mm × 45 mm
Housing Material
Tin plate
Optical Receiver
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-RX
1530 nm
LH-RX
1550 nm
HV+Terr.-RX
1570 nm
HH-RX
Responsivity
≥0.9 A/W
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. Output Level
≥80 dBµV
AGC
Terr. Return Loss
≥14 dB
CNR
≥50 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 Output Level
75 dBµV ± 5 dBµV
AGC
AGC Stability
±1 dB
Other Parameter
Power Supply
20 VDC
Power Consumption
<10 W
Dimensions
195 mm × 128 mm × 40 mm

SAT-IF CWDM Optical Transmitter and Receiver
Solutions Provider for FTTx, RFoG, and HFC
www.ascentcomtec.com
Page 10 of 13
1) A optical transmitter or receiver
2) A 20VDC/2500mA DC power adapter
3) A user's manual
Optical transmitter
1. Output power working normally in the first beginning but it is not working when reconnecting.
Solution: clean the optical connector with alcohol or change optical connector
2. Using optical power meter for testing, output power work normally. But it not working when
connect to link.
Solution: checking the type of optical connector if APC. If in PC or UPC, use optical Fiber Patch
Cord for connecting Optical Receiver
3. Input with optical signal but no RF signal output-
Solution: Check OPT indicator light, if the light off, the input optical power is lower than
working range, if the light in red, the input optical power is higher than working range. Please
be sure input optical power is in the working range.
4. RF signal output working normally when testing, but here not have RF signal output when install
on designated spot.
Solution: Check if there any pollution on designated spot and clean the optical connector with
alcohol. Also it will have same problem relevant to space on designated spot. If fiber cable
bending in large, it will lead to excessive loss of fiber. Please install the optical receiver in the
right position.