The following picture shows you the front view of a LFRX card.
Depending on the card configuration, the 'Opto In' connector is an E2000 or a FC/APC connector. Connect here the optical fibre which signal should be received.
The following indicator LED's are located on the cards front panel:
| Name | Description |
|---|---|
| PD | This (green) LED shows the state of the receive pin-diode. The LED turns on, if there is an optical input connected to this card. |
| PS | The (green) PS-LED displays the power supply state of the card. The LED is on, if the power supply of the card is working. |
| Max | The (yellow) Max-LED turns on, if the RF input power is above the recommended level. RFmax Alarm level: typ. -5dBm (-10...-3dBm) |
| Min | The (yellow) Min-LED turns on, if the RF input power is below the recommended level. RFmin Alarm level: typ. -31dBm (-38...-28dBm) |
You have the possibility to change the following parameters:
| Parameter | Description |
|---|---|
| Gain | An integrated attenuator makes is possible to attenuate the RF-output-signal in 1dB-steps from 0 to 31dB. This switch has 16 steps. Use this switch to select the attenuation range to 0-15dB or 16-31dB. |
| 0..15 | By setting this switch, you define the range of attenuation, that can be set by the gain switch. In the 0 position, it is possible to set the attenuator from 0-15dB, in the 15 position, the attenuation value can be set from 16-31dB. |
| RM..LC | This DIP-switch defines, if the card is controlled remote RM or local LC . If the switch is in the LC position, it is not possible, to change the parameters of this card via remote Interface (IP, RS232, SNMP) or via the front panel keyboard of the LFTX/RX chassis. |
Additionally you can measure the following parameters:
| Parameter | Description |
|---|---|
| TPout -10dB | The testport gives you the opportunity to measure the RF-Level on the Front panel. The Signal, that you can measure here is about 10dB lower than the output signal on the back side of the LFTX/RX chassis. This difference may vary due to optional configurations integrated to the sat-nms LFTX/RX Frame (e.g. redundancy switching, 1:4 splitter, 50/75 converter) |
| PWR | Here you can measure the level of the RF power. The scaling is 50mV/dB |
| GND | Reference Ground for the PWR measurement. |
| GND | Reference Ground fort he PDP measurement |
| PDP | Here you can measure the optical input power. 100mV relates to 100uW. |