Motorola APX 3000 Basic Service Manual page 76

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- In the Audio Zone, select the 1011 Hz PAT code and set the deviation to "PROJ25Dev:
2.83 kHz ~".
The bit error rate screen contains the following fields:
• Rx Frequency:
This field selects the Receive Frequency directly in MHz.
• Test Pattern:
This field selects the Digital test pattern to be received by the radio. Choices are: Standard
Tone Test Pattern (Framed 1011), F2 1031, Standard Interface Test Pattern (CCITT V.52) and
Phase 2 Digital (1031 Hz) Test Pattern.
• Modulation Type:
This field represents the digital modulation type of the incoming signal on which BER is to be
calculated.
• Continuous Operation:
This field allows the user the option to repeat the BER test indefinitely. A selection of Yes will
cause the radio to calculate BER on a continuous basis and update the results on this screen
after each integration time. A selection of No will cause the BER test to execute for only one
sample of the integration time and then update the display.
• Audio:
This field allows the user to select the audio output during a test. Selecting Internal will cause
the radio's built-in speaker to unmute to any signals at the desired frequency which are present
during the test. Selecting External will route the same signal to the radio's accessory connector
audio output. Selecting Mute will disable the audio output.
NOTE: There will be no audio option available for APX 3000 when performing a Bit Error Rate Test.
• BER Integration Time:
BER Integration Time carries with Test Pattern Type.
• Number of Frames
Number of Frames over which bit error result are accumulated to produce the result.
NOTE: When Continuous Operation = Yes, all fields will be grayed out while the test is in progress.
They will be enabled when the STOP button is pressed.
When Continuous Operation = No, a wait cursor will be displayed while the test is in
progress and return to normal when the test is done.
3. Press Start/Stop button to begin or end BER testing.
Radio Alignment Procedures: Performance Testing