Multitone BSR 113, Техническое руководство, Страница: 41 / 63

BSR 113
TM1194A Issue B Page 5 - 7
l) FL10:
I) Adjust the first slug of FL10 for best SINAD. Ensure that the best tuning
point is found by first adjusting the slug from one extreme of travel to the
other.
ii) Reduce the RF level from the signal generator to maintain about 12dB
SINAD.
iii) Repeat (I) and (ii) for the second slug of FL10.
m) Set the RF level from the signal generator to -50dBm.
n) Repeat (d) to (l).
p) Set the RF level from the signal generator to 5dB above the level required for
12dB SINAD.
q) Reduce the volume control for the SINAD meter loudspeaker to zero. Increase
the BSR output volume control for a comfortable listening level.
r) If fitted, remove the noise Squelch defeat link LK1. Fit the tone Squelch defeat
link LK3, if not already fitted.
s) Adjust variable resistor RV2 until the audio mutes, then turn RV2 in the
opposite direction until the audio just comes on.
t) Increase the RF level from the signal generator to 10dB above the level
required for 12dB SINAD. Check the operation of the noise Squelch by
switching the carrier on and off.
u) Restore LK1 and LK3 to their original positions.