Fiber Reception After Coupler - SEFRAM 7849B User Manual

18.5

Fiber reception after coupler

The optical option makes it possible to make measurements after terrestrial coupler / sat at the output of
the fiber.
Warning: The appliance can measure only one wavelength at a time. If there are several wavelengths,
measurements will be wrong.
You'd better check the optical power of the coupler before processing
Example of installation:
Vertical polarisation sat. 10750 to 12750
Horizontal polarisation sat. 10750 to 12750
To display the signal at the output of your installation, you must connect the RF output of the optical option
to the RF input of the appliance via the provided angled F/F cable. Power your coupler (no external power
supply is provided with the measurement appliance).
Remove the protective plug from the FC APC optical socket; if required, use the provided jumper cable,
and connect the optical fiber from your dish to the same socket.
Then, you can turn your dish (see chapter
chapter 2.2.2 Installation of a terrestrial
Once the measurements are made, put the plug onto the optical socket of the appliance.
Warning :
Use an external optical attenuator if necessary.
7849B – 7859B – 7817B
RF Satellite
Vertical polarisation fiber
950 to 3000MHz
SAT/TERRESTRIAL
COUPLER
RF terrestrial
50 to 900MHz
2.2.3 Installation of a
antenna).
- Optical Power measurement between -50 / +10 dBm
- Optical conversion -> RF between -12 / -3 dBm
Horizontal polarisation fiber
3400 to 5450MHz
Optical output
50 to 5450MHz
External
power
dish) and/or your terrestrial antenna (see
p.
83
(Measurement of optical
Measurement on FC APC
power)