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Chapter 2 33

Test Descriptions

TEST_11 - TXA RVC Data Deviation

Applications

RVC data is Manchester-encoded data that is used for cellular system

signaling and control. Manchester encoding is accomplished by

transforming each NRZ (non-return to zero) binary one to a zero-to-one

transition and each NRZ binary zero to a one-to-zero transition. The

data stream is then used to modulate the transmitter carrier using

direct, binary, frequency-shift keying (FSK).

On the wide voice channels, the data rate is 10 kilobytes/second and the

nominal peak transmitted deviation is 8 kHz. All other modulation

sources to the transmitter are inhibited when the data is transmitted

(“blank and burst”).

On the narrow voice channels, the data rate is 100 bits/second and the

nominal peak transmitter deviation is 700 Hz. The data words are

inserted into the DSAT data stream. The transmitter is modulated

simultaneously by voice audio and the data stream.

Pass/Fail Limits Used

• 23. TXA NAMPS DSAT Deviation (Hz)

• 38. TXA Wideband Data Deviation Steady State (kHz)

• 39. TXA Wideband Data Deviation Transient (kHz)

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]

• 6. CPA SAT Tone (Hz)

• 14. RC Compandor is Always On [0=no 1=yes]

• 22. RX RF Level for Signaling (dBm)

• 48. TXA Transient/ss data [0=tran 1=bth 2=ss]

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

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Carrier 38TXA Guide Betriebsanweisung Seite 33