Nortel DualMode 800, Maintenance Manual

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Performing tests using the DCSM in the directed mode 9-15
Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08
TEST MRLP
This is the MTX RF Transmitter test. The test measures the following:
• the Tx Power(dBm) of the Forward RF link
The MRLP test can be invoked in the following ways:
• from a posted transceiver at the VCH MAP level
• from the CTT level (all available VCH are tested starting with the first
available)
• automatically using Table CTTSCHED (this also selects the first available
VCH)
Once the test is invoked a call is terminated to the DCSM mobile. The DCSM
then transmits a 1004 Hz tone at 2.9 kHz deviation for five seconds, after
which the FWD audio is looped to the REV audio. The TTT then transmits a
tone (level and frequency determined in Table CTTPARMS) which is
transmitted on the forward RF path by the DUT to the DCSM. The DCSM
subsequently loops the forward audio to the reverse audio and transmits the
tone to the DUT through the reverse RF path. Once the link has been verified,
the DCSM is instructed by the MTX to measure the level of the forward RF
signal. The measured level is returned to the MTX by the DCSM for
reporting. Refer to Figure 9-7 for a diagram of the test operation.
The test either passes or fails depending on the level returned is within the
limits set by the MRLP tuple in Table CTTPARMS. Table CTTGROUP
defines the RF power level which the DCSM should measure.
Figure 9-7
MRLP Test Measurements
DCSM
DUT
TTT
NM
Network
DRU or BST
MS
RF path
The TTT measures
the tone level
RSSI Measured
The DCSM measures
the RSSI of the Near-
to-far on-air link.
Tone transmitted