Testing Your Installation; Pre-Power Testing; Figure 99 - Simplified Circuit Diagram (Only One Transtector Shown For Clarity) - Motorola PTP 600 Series User Manual

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11.3 Testing Your Installation

If you have followed the above instructions you will have wired your system to the following
diagram:

Figure 99 - Simplified Circuit Diagram (Only One Transtector Shown For Clarity)

11.3.1 Pre-Power Testing

Before plugging in the RJ45 to the PIDU check the following impedances at the RJ45;
1. Check the cable resistance between pins 1 & 2, 3 & 6, 4 & 5 and 7 & 8 at the RJ45.
Check against column 2 in Table 17.
2. Check the cable resistance between pins 1 & 3 at the RJ45. Check against column 3 in
Table 17.
3. Check the cable resistance between pins 4 & 7 at the RJ45. Check against column 4 in
Table 17.
4. Ensure that there is greater than 100K ohms between pins 1 & 8 for all cable lengths.
5. Ensure that there is greater than 100K ohms between pin 1 and ODU ground for all cable
lengths.
6. Ensure that there is greater than 100K ohms between pin 8 and ODU ground for all cable
lengths
165

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