Rev 0.11
Page G.703-12
Mount the G5 card to the chassis using the 4 #6 mounting screws with lock washers. An
additional flat washer may be required to keep the PCB mounting screws from extending beyond
the chassis bottom. Tighten the rear plate mounting screws and then the PCB mounting screws.
Connect the upper 40 pin ribbon cable connector to the main PCB header and press down to
close the latches. Care must be taken to avoid bending the installed FEC card which is very close
to one latch.
Re-install the cover and plug the unit in. Using the front panel arrow keys scroll down to the
interface parameter and verify that the modem recognizes the newly installed card. The modem is
now ready to be put into service.
3.2.
Physical Connectivity Tests
The following tests will verify the proper installation and performance of the G5 card within the
PSM-500 modem. Connectivity and performance will require the use of a Bit Error Rate Tester
(Fireberd or similar) with an E1 and/or Fractional E1 interface.
3.2.1. Local Loopback
This first test checks the local interfaces and cable and does not require a satellite link or other
earth station equipment.
The G5 interface will loopback the transmit input data back out on the receive data port by using
the Local Loopback settings on the front panel
<Intf:Test>
menu. Refer to the front panel
configuration menus in the PSM-500 I&O Manual and
Table 1 above for setup information of all the modem functions. Table 5 shows the menu
selection for enabling the local terrestrial loopback function.
Table 5
Front Panel Terrestrial Loopback menu
Function
Type
Entry
Description
Test
TerLoopbck
Enable
Selection
0 = Disable1 = Enable
Interface terrestrial
loop-back Send Data
input to Receive Data
output.
Verify that the BER tester is able to achieve data synchronization and there are no errors. Once
the test is finished, remove the test mode by setting the TerLoopbck to Disable.
3.2.2. Modem IF Loopback
If the Local Loopback test passed, then test the performance of the G5 interface within the PSM-
500 modem. The test setup for this test is shown in
Error! Reference source not found.
.
The PSM-500 modem will loopback the Modulator TX IF Output back to the Demodulator RX IF
input by using the Local Loopback settings on the front panel <
Dem:Test
> menu. Refer to the
front panel configuration menus in the PSM-500 I&O Manual and
Table 1 above for setup information of all the modem functions. Table 6 shows the menu
selection for enabling the IF Loopback function.
Table 6
Front Panel IF Loopback menu
Function
Type
Entry
Description
Test
IFLoopbck
Enable
Selection
0 = Disable
1 = Enable
IF Loop-back control.