Xpd Adjustment (For Antenna Direct Mounting Type) - NEC iPasolink 200 Manual

ANTENNA ORIENTATION
7 At each station, restore the "Antenna Alignment Mode" to "off" using the LCT,
8 At each station, reset control items to original using LCT,
9 At each station, restore the "MAINT Mode" to "off" position using the LCT,
10 At each station, disconnect the digital multimeter or PASOLINK Monitor from
the RX LEV MON connector,
11 At each station, reconnect the cap removed in step 4,
Note

XPD Adjustment (For Antenna Direct Mounting Type)

Note
1 Loosen three screws (SCREW1, 2 and 3 in Fig. 10-5) and rotate antenna
(connected OMT/ODU) so that the RX LEVEL MON indicates the maximum
value at the ODU of the Main Master and Sub Master channels,
2 At opposite station, turns the ODU of the Sub Master channel power OFF (for
both No.1 and No.2 Sub Master channels in 1+1 system),
3 In this conditions, check the RX LEVEL MON indication value for XPD at the
ODU of the Sub Master channel,
4 Confirm that the XPD is more than 25 dB, if not, repeat Azimuth Angle,
Elevation Angle and XPD Adjustment,
5 At opposite station, turns the ODU of the Sub Master channel power ON,
Installation
Submission Prohibited
NEC Internal Use Only
The RX LEV MON connector must be capped for waterproof.
The XPD adjustment using cross-polarization signal should be done
more carefully than using co-polarization signal because XPD changes
sharply in the axial direction.
10-9
NWD-107460-02E