Nortel DualMode 800, Maintenance Manual

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Performing tests using the DCSM in the directed mode 9-9
Wireless Solutions DualMode 800 Enclosure Maintenance Manual MTX08
MTX CTT tests
MTX CTT (Cellular Terminal Tests) tests use the DCSM as a test mobile to
test AVCHs by looping around a tone generated by the MTX Trunk Test
Terminal (TTT). These tests measure the performance of the specified AVCH
and associated trunks. The performance criteria measurable are:
• wireline trunk audio performance (loss) and associated noise
(MALT, MAHT)
• wireless trunk RF performance (loss) and associated noise
(MRLT, MRHT)
• forward and reverse RF strength performance (MRLP, MRLR)
• system call set-up capability (MTRM, DTRM)
Naming conventions
All MTX trunk tests use a four letter acronym to describe the functionality of
the test. Each letter of the test acronym is explained in Table 9-1.
MTX Audio Low Test and MTX Audio High Test (MALT/MAHT)
This test does not require a DCSM. The MALT and MAHT test measures the
following MTX trunk parameters:
• far-to-near-loss
• loop loss
• loop noise
Table 9-1
Naming convention of the MTX trunk tests
Letter # Designation
1 M = MTX — test a MTX VCH trunk
D = DCCH — set-up VCH trunk
2 A = Audio — test the audio link of the trunk
(DCSM is not a requirement)
R = RF — test the RF link of the trunk
3 L = Low — use a low level tone for the test
H = High — use a high level tone for the test
4 T = Transmission — measure transmission loss and
noise
R = Receiver — measure the reverse RF power level
of the VCH
P = Power — measure the forward RF power level of
the VCH
Note:
DTRM and MTRM violate this naming convention.