![Symmetricom XLi User Manual Download Page 183](http://html.mh-extra.com/html/symmetricom/xli/xli_user-manual_1419618183.webp)
172
XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
1
To set a unique card ID number, compare the SW2 DIP switch settings with those of the other Multicode/
N.8 Frequency Synthesizer cards present. Then set individual switches using the following table as a
guide:
Adjusting Amplitude and Modulation Ratio
Perform these steps to change the Amplitude and Modulation ratio from the factory defaults. To perform
adjustments:
Remove the top lid of the XLi and retain the screws.
Install the Multicode card in the XLi. Use a top slot so the output level and modulation ratio
potentiometers are accessible by removing the top cover from the XLi chassis. See “Installing or
Removing Option Cards” on page 21.
Using a BNC “T” and coax cables, make a three-way connection between the three following items:
•
OUTPUT 1 on the 87-6002-XL1 Multicode option card
•
A load with the desired impedance or the target system
•
The input connector on an oscilloscope
Adjust potentiometer LEVEL1 (R90) with a tweaker tool for desired voltage amplitude.
Adjust potentiometer RATIO1 (R91) with a tweaker tool for desired voltage ratio.
Card ID # SW2-1 SW2-2 SW2-3 SW2-4
1
Off
Off
Off
Off
2
On
Off
Off
Off
3
Off
On
Off
Off
4
On
On
Off
Off
5
Off
Off
On
Off
6
On
Off
On
Off
7
Off
On
On
Off
8
On
On
On
Off
9
Off
Off
Off
On
10
On
Off
Off
On
11
Off
On
Off
On
12
On
On
Off
On
13
Off
Off
On
On
14
On
Off
On
On
15
Off
On
On
On
16
On
On
On
On
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com