Coherent Modulation Transmitter | IQTX
Quantifi Photonics Ltd.
Version
1.04
16
Setting up IQTX for single polarization (IQTX 1100 Series models only)
•
Ensure that the IQTX is ON before applying any RF signals to the RF signal inputs.
•
Ensure the input RF signal voltage remains below the specified 500 mV pk-pk.
•
For advice on connector care, refer 4 Working with electrical connectors.
To generate a single polarization signal (QPSK) aligned to a single state of polarization:
1.
Connect the data channels from the RF source to the In-phase and Quadrature RF signal inputs.
2.
Connect the Internal Laser Output to the Modulator Laser Input using the short (20 cm) blue PM
patch cord supplied with the instrument. Alternatively, you can connect your own narrow-
linewidth Laser with a PM output using a PM patch cord (linewidth needs to be less than 500 kHz).
3.
Use the output port of the modulator for a linearly polarized single polarization signal.
The power level going into the modulator Laser input port must not exceed the Max Input power
specified for the model.
STEP 4:
Once all connections are completed, turn ON the
isolation switch located next to the mains socket.
The switch will illuminate indicating that the AC
power supply is live and the IQTX is ready to be
powered ON.
STEP 5:
Power ON the instrument.
STEP 6:
IP address will appear on the LCD screen. If IQTX is connected via Ethernet and USB, the display will
alternate between the USB and Ethernet IP address (for details refer section 10.2.1).
After powering on, please wait at least 1 minute before attempting to communicate with IQTX. This
gives IQTX time to finish boot procedures and initialize the communication server.