RF Electronics RF-T860/24 Installation & Operation Manual Download

Page: 13 / 13

RF-T860 Optical Transmitter

Page 10

Installation and Operation Manual

7. Trouble shooting

Trouble

Reason.

Solution

Power on, the LCD

is off.

Switch Power

is abnormal.

Check the power socket,

connect the supplier to get help.

Power

on,

alarm

signal shows on the
LCD.

1.The

Operating
Temperature is
too low, waiting
for a moment.

2.Waiting for

a moment after
power on.

The software would reset the

automatically, otherwise, please
press the RESET key.

If the machine still can’t work

after you press the RESET key for
several times, please cut off the
power and contact the supplier.

Power

on,

LCD

shows normally, but
Optical

Power

abnormal

The optical

connector is
dirty.

Clean connector ends with a

lint free tissue and alcohol (above
99%) before mating. Loose
screws fixing the optical connector
plate to clean the connector when
it is necessary.

All manuals and user guides at all-guides.com

Summary of Contents for RF-T860/24

Page 1: ...e by qualified personnel only To reduce the risk of electrical shock please do not perform any serving other than that contained in the installation manual unless you are qualified to do so Refer all servicing to qualified service personnel All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 2: ... 2 3 BLOCK DIAGRAM 2 2 3 1 ATC Loops 3 2 3 2 APC Loops 3 2 3 3 RF loops 3 2 3 4 Data Collection Control and Internet 3 3 SPECIFICATION 4 4 BOARD ILLUSTRATION 5 4 1 FRONT PANEL 5 4 2 REAR PANEL 6 5 INSTALLING 7 6 TESTING 9 6 1 TEST EQUIPMENT CONNECTION FOR RESPONSE AND RETURN LOSS TESTING9 7 TROUBLE SHOOTING 10 Trouble 10 All manuals and user guides at all guides com ...

Page 3: ...0 please contact us Please do not open the unit and verify any circuit yourself and it is necessary to make some simple check before calling service When shipping equipment for repair please follow below steps Pack the unit security Enclose a note describing the exact problem Ship the unit prepaid to us All manuals and user guides at all guides com ...

Page 4: ... automatically Reset key is used to reset the working of the transmitter while the Applied power is on which commonly be used in the start and the alarm status Three Indicating LED show the status of the unit including the Applied power working status RF level Green lamp shows the status is normal while red lamp shows the status is abnormal These LED are monitored by the CPU ALC MGC switch Set the...

Page 5: ...Cut off the optical power automatically when the work is abnormal RS232 port for the monitoring status through remote computer 2 3 Block Diagram The transmitter is based on 6 functional blocks Optical laser temperature controlled ATC Optical power control electronics APC Data Collection Controller Communication Circuit RF Circuit and so on The Block Diagram is in Figure 2 Figure2 RF T860 Block Dia...

Page 6: ... Optical power will drop down the Carrier Noise will declined on the same time the CSO CTB would get bad The Auto Power Control Loop is mandatory to maintain the stable of the optical power to control the optical power of the laser automatically One optical fiber detector circuit is sealed in the semi conductor laser parts which could supervise the laser diode In case of an optical output power fa...

Page 7: ...Input 1 Frequency Range 45 870MHz 2 Frequency response 0 75dB 3 Input Return Loss 14 dB 4 Input Impedance 75Ω 5 Attenuator Adjustment Range 10 dB 6 Input Level Adjustment Range 75dBµV 80dBµV 7 Connector Type F 3 3 Link Specification 1 CNR 52 dB 59 channel PAL B G Carrier 1dBm Optical power Receiving 2 CSO 61dBc 3 CTB 65dBc 3 4 LED and Alarm 1 Power Normal Green Abnormal red 2 Working Status Normal...

Page 8: ... Lamp The Lamp lit green when the power is normal or else the lamp turn red and the LCD shows warning message 3 Working Indicating Lamp The Lamp lit green when the working is normal or else the lamp turn red and the LCD shows warning message 4 RF working status Indicating Lamp The Lamp lit green when RF Input signal is available or else the lamp turn red The lamp lit red also when the laser power ...

Page 9: ...8 RF Attenuator Adjust the RF attenuation with is switch 9 ALC MGC Switch Set the ALC MGC Switch to MGC side before you adjust the RF attenuation Put the ALC MGC Switch to ALC side to maintain the general RF input to the laser 10 RF Test Port RF Test Port is used for monitoring the inject RF Level When the testing RF Level equals with the value offered by the supplier users can obtain the accordan...

Page 10: ...ock to ON position Apply power to this transmitter the Power Indicating Lamp lit green when the power is normal Otherwise cut off the power immediately and so on in the abnormal power in the future and contact with supplier This machine should be safely ground 3 LCD display and lamp indication LCD shows PLEASE WAIT After a moment shows LASER TEMP 2 between 23 27 and COOL CUR mA Press the Status In...

Page 11: ...n 8 MGC AGC Set the ALC MGC Switch to MGC side and adjust the RF attenuator until the RF Test Port level equals the value listed in Table below the suggested monitoring frequency is 543 25MHz Also you can set the ALC MGC Switch to ALC side and do not need any adjustment The RF Test Port Level should be maintained on 75 85dBμV Please note that in this case the laser input level Vi P N P represents ...

Page 12: ...ransmitter and receiver with optical attenuator Connect Network Analyzer with optical transmitter s RF input port Connect Network Analyzer with optical receiver s RF input port 4 In the Frequency Range 45M 750 860MHz frequency response is within 0 75dB Return Loss is above 14dB Note When ALC AGC switch is at MGC side adjust the RF attenuation with RF Attenuator Be sure the Flatness is in 0 75dB fr...

Page 13: ...ment after power on The software would reset the automatically otherwise please press the RESET key If the machine still can t work after you press the RESET key for several times please cut off the power and contact the supplier Power on LCD shows normally but Optical Power is abnormal The optical connector is dirty Clean connector ends with a lint free tissue and alcohol above 99 before mating L...

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