WebEML User Manual RF Core Facing Loopback
1037
Figure 776 Maintenance tab (MPT-HLC shown)
To activate a Transmit RF Core Facing Loopback
1. Activate Transmit RF Core Facing Loopback using the following procedure. See
Figure 776.
a. Record the current Shifter (MHz) value.
b. Record the current RX Freq(KHz) value.
c. TXMute the local MPT-HL Transceiver cards, position the TXMute switch to
the OFF position (PA switch set to ‘0’).
d. Using the craft terminal, TXMute the far-end MPT-HL Transceiver cards.
e. Select Custom as the new Shifter (MHz) value.
f. Click on the Apply button.
g. Set the RX Freq(KHz) to the same value as the TX Freq(KHz) value.
h. Click on the Apply button.
i. Release TXMute on the local MPT-HL Transceiver card under test, position
the TXMute switch to the ON position (PA switch set to ‘1’).
The loopback should be active. If no loopback is active, error-free operation on
the test signal, then an external connection on the filter will be required.
Release 7.0.0 3DB 19286 ACAA Issue 01
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