Moseley Starlink SL9003Q, Руководство пользователя, Страница: 33 / 141

Section 3: Installation 3-7
Moseley SL9003Q 602-12016-01 Revision J
9) With the POST-BER in the display, press ENTER. This will reset the bit counter (# BITS)
to zero. There should be no errors (# ERRORS = zero) under this signal condition.
10) Verify BER threshold performance of the system as follows: Increase the variable
attenuation until the QAM MODEM STATUS (BER POST) screen displays a BER POST reading
of approximately 1.00E-06. This will take some time in order to accumulate enough bits for
an accurate measurement.
11) The RSL reading for both 2 channel and 4 channel should be approximately: –89 dBm
(+/- 2 dBm)
12) Set the variable attenuator for a reading of -60 dBm on the display.
13) Reset the bit counter (press ENTER) and verify error-free operation
14) Proceed to the Audio Bench Test for further performance verification.
3.2.2 Discrete Audio and Data Channel Bench Test
Test Equipment
• RF Wattmeter : 950 MHz operation with a measurement range of 1–5 Watts
• RF Power Attenuator : 50 ohm, 5 watt “dummy load” for 950 MHz operation with 20 to
30 dB of attenuation
• Variable Step Attenuator : 0–100 dB at 950 MHz