Carrier 38TXA Guide Guide de l'utilisateur télécharger pdf (Page 19)

Chapter 2 19

Test Descriptions

TEST_03 - TXA Frequency Error

Description

This test measures the difference between the unmodulated carrier

frequency and the assigned carrier frequency. TXA frequency error is

measured on a voice channel with voice modulation off, and SAT

modulation on. This test is performed at the nominal supply voltage.

This test can only be performed at the high and low supply voltage

settings if an GPIB programmable power supply is configured into the

test system and parameter 20. RT Test at Extreme Settings [0=no

1=yes] is set to 1. See “TEST_03 - TXA Frequency Error” on page 19 for

details on configuring an GPIB programmable power supply.

The frequency error is expressed in parts-per-million (ppm).

Pass/Fail Limits Used

• 20. TXA Frequency Error (ppm)

Parameters Used

• 1. CPA Control Channel [1-799 or 991 -1023]

• 2. CPA DSAT Vector

• 3. CPA Enter Ph# [0=If Needed,1=Always,Here]

• 4. CPA MIN From? [0=RECC,1=All 0’s,2=Phone #]

• 5. CPA Prt RECC RVC Data [0=no 1=yes 2=fail] 0

• 6. CPA SAT Tone (Hz)

• 15. RT High Supply Voltage (Vdc)

• 16. RT Low Supply Voltage (Vdc)

• 17. RT Nominal Supply Voltage (Vdc)

• 20. RT Test at Extreme Settings [0=no 1=yes]

• 22. RX RF Level for Signaling (dBm)

• 49. TXA TS Atten for Signaling [0, 20, 40] (dB)

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Carrier 38TXA Guide Guide de l'utilisateur Page 19