aci DSIM-GI, Руководство по установке

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DSIM-GI
Installation Guide Rev R
Page 11 of 20
11. Measure and record the RF output level of the amplifier at the highest operating frequency.
Using the table bellow adjust t
he RF output level by pushing the “+" button to increase or
the "-
“ button to decrease the RF output level. Pressing the button once is used for small
increments, holding the button down is for large increments.
Below 20ºF (-6.7ºC) -2dB
Between 20ºF (-6.7ºC) & 40ºF (-4.4ºC) -1dB
Between 40ºF (4.4ºC) & 80ºF (26.7ºC) no change
Between 80ºF (26.7ºC) & 100ºF (37.8ºC) +1dB
Above 100ºF (37.8ºC) +2dB
12. After the RF level adjustment of the DSIM AGC module has been made, reset the RF
output level to the value recorded in step 11 by adjusting the input pad value.
13. All DSIMs have a thermal fallback default setting of 27 dB. To change it, push the MODE
button twice. The controller LED should be purple indicating TGC mode. There are three
TGC factor options: 9 dB, 18 dB and 27 dB. The blinking pattern should indicate 27dB.
Push the '-' button once for 18 dB or twice for 9 dB. Check the blink pattern to verify
thermal fallback value.
a. Blink patterns for TGC
i. 27 dB (2 fast blinks, pause, 7 fast blinks, pause, 3 long blinks)
1. For more than 1000ft of cable before the amplifier
ii. 18 dB (1 fast blink, pause, 8 fast blinks, pause, 3 long blinks)
1. For 600ft - 1000ft of cable before the amplifier
iii. 9 dB (9 fast blinks, pause, 3 long blinks)
1. For less than 600ft of cable before the amplifier
14. Press the 'Mode' once to go to MGC mode. Check that the output level and slope are
correct. Once level and slope are set, press “Mode” once to exit MGC (manual) mode. The
DSIM will now go thru the alignment process. The LED on the controller will flash blue and
red (about 45 seconds) until the alignment process has completed.
15. When the alignment process has completed, the controller LED will blink blue indicating
that the DSIM is now in the AGC mode. If the LED does not change to blinking blue, and
instead the DSIM LED flashes blue and orange the pilot signal is either too high or too low
going into the DSIM. Check the output signal and make sure that the ADU pot is fully
counter clock wise. Press the mode button 2 times and then go back to step 14.