User manual

3-8 Section 3: Installation
Moseley SL9003Q 602-12016 Revision G
3.2.1. RF 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
Procedure
1. Connect the equipment as shown in Fig. 3-3 for a Discrete Audio link or Fig. 3-4
for a Digital Composite STL. Be sure to physically separate the TX and RX units
by greater than 15 feet, in order to provide isolation for the BER threshold
measurement. Calculate or measure the signal level present at the SL9003Q RX
antenna input (-60 dBm typical).
2. Apply AC power to the SL9003Q receiver. On the Receiver module rear panel,
the RX LOCK LED will light up red and change to green, indicating PLL lock of
the down-converter. On the QAM Demod module rear panel, the DEMOD LED
will flash red, indicating that there is no lock yet at the demod.
3. Apply AC power to the SL9003Q transmitter. On the Transmit Module rear
panel, the TX LOCK LED will light up red and change to green, indicating PLL
lock of the up-converter. On the QAM Mod module rear panel, the MOD LED will
flash red, and then change to green, indicating lock of the QAM modulator.
4. The output power on the wattmeter should measure between 0.9 and 1.1 Watts.
5. Within 90 seconds after the TX carrier is present (30 sec. typical), the DEMOD
LED will stop blinking and turn to a solid color:
• GREEN indicates high signal strength (ACCEPTABLE)
• YELLOW indicates average signal strength (TYPICAL)
• DARK ORANGE indicates low signal strength (ACCEPTABLE)
• FLASHING RED indicates no signal (NON-OPERATIONAL)
6. After verifying the DEMOD LED is within the color range, go to the QAM RADIO
RX STATUS screen on the front panel LCD display and page down to the RSL
parameter (see below).