User`s guide
44 Chapter 2
S:\agilent\83217\OPT001\BOOK\CHAPTERS\tdscrip.fm
Test Descriptions
TEST_17 - RXA Hum and Noise
TEST_17 - RXA Hum and Noise
Description
This test measures the ratio, expressed in dB, of:
• The residual audio output in the absence of modulation,
• To the rated audio output.
NOTE
Audio connections from the radio to the test system are required for this
test.
•A
−50 dBm RF signal is applied to the receiver’s antenna.
•The
−50 dBm RF signal is modulated to deviate to 8 kHz at a 1 kHz
rate with a SAT tone present.
• The SAT tone is always on during this test.
• Narrow analog operation uses 3 kHz deviation and DSAT.
Pass/Fail Limits Used
• 7. RXA Hum and Noise (dB)
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)
• 31. RXA Set Audio Lvl [0=no xx=level volts]
• 32. RXA Tolerance for Setting Audio Level (% error)
• 49. TXA TS Atten for Signaling [0, 20, 40] (dB)