Wegener UNITY4000, Instruction Manual, Page: 21 / 75

2-7 UTY4000-003
jumper (J22) is used to enable/disable DC power on RF-In center-pin. (Therefore, to get DC
power on the RF-In center pin, both J22 and DIP switch must be set.)
2.3.15 Four Input / One Output RF Switch (Optional)
2.3.15.1 Description
The module is installed into the MODULE 2 option-slot position on the back of the parent IRD.
It allows the IRD to select one of four antenna / LNB inputs when its RF OUTPUT jack is
connected via a 75-ohm coax cable to the IRD RF INPUT. There is no power pass for LNB DC
power. (DC for the LNB is provided on the UTY4000 rear terminal strip and requires an
external DC power inserter. No DC voltage is applied to any F connector.) The input and output
RF connectors are Type-F jacks, and they are located on the option module rear panel.
No user-accessible controls or indicators are located on the module.
2.3.15.2 Electrical Characteristics
The characteristics described in Table 2-7 are measured at a -25 dBm input level.
Table 2-7. RF Switch Characteristics
Parameter Specification
Input Isolation, Port to Port
(all ports terminated) >
35 dB, 950-1450 MHz
≥
24 dB, >1450-2150 MHz
Input VSWR (selected port,
75-ohm system) ≤
2.5:1, 950-1450 MHz
≤
3.5:1, >1450-2150 MHz
Insertion Loss ≤
1.5 dB, 950-1450 MHz
≤
4 dB, >1450-2150 MHz
2.4 LOCAL CONTROLS AND INDICATORS
2.4.1 Front Panel
See Figure 2-3 (page 2-12) for a view of the front panel.
2.4.1.1 Front Panel Display
The front-panel includes a 2-line by 20-character display to support the local user
monitor/control interface. See Table 3-11 (Page 3-12), and Appendix B for details on the
messages displayed there, as well as the menus supporting the keypad interface described in
section 2.4.1.2.