Charles 3653-36 Manual Download Page 9

Section 365-336-202

9

Step

Action

1.

Determine the required ELL by adding the setting for the XMT ATTN and RCV ATTN settings and sub-
tracting  32.5.

ELL = XMT ATTN + RCV ATTN – 32.5

2.

Set switch S6 to the required ELL to the nearest 0.5dB.

3.

If the ELL is a negative number, set switch S7 to ATTN position; if the ELL is a positive number, set
switch S7 to the GAIN position.

Table 2.  Common Transmit TLP Values

Desired TLP

Set S3 & S2

Desired TLP

Set S3 & S2

+13
+12
+11
+10

+9
+8
+7
+6
+5
+4
+3
+2
+1

+0.5

 0

 –0.5

 –1

  –2

32.5
31.5
30.5
29.5
28.5
27.5
26.5
25.5
24.5
23.5
22.5
21.5
20.5

 20

19.5

19

18.5
17.5

–3
–4
–5
–6
–7
–8
–9

–10
–11
–12
–13
–14
–15
–16
–17
–18

–19.5

16.5
15.5
14.5
13.5
12.5
11.5
10.5

9.5
8.5
7.5
6.5
5.5
4.5
3.5
2.5
1.5

0

Table 3.  Common Transmit TLP Values

Desired TLP

Set S4 & S5

Desired TLP

Set S4 & S5

+13
+12
+11
+10

+9
+8
+7
+6
+5
+4
+3
+2
+1

+0.5

        0

 –0.5
    –1

   –2

0
1
2
3
4
5
6
7
8
9

10

11

 12

12.5

13

13.5

14
15

–3
–4
–5
–6
–7
–8
–9

–10
–11
–12
–13
–14
–15
–16
–17
–18

–19.5

16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

32.5

Summary of Contents for 3653-36

Page 1: ...otice Page 1 of 12 3653 36 4W Transmission Only with Extended Range and Loopback 4W TO ER LB Channel Unit CONTENTS PAGE Part 1 GENERAL 2 Part 2 INSPECTION 2 Part 3 APPLICATION GUIDELINES 3 Part 4 CIRC...

Page 2: ...es selectable tone loopback disable Prescription adjustable loopback level of up to 31 5dB of gain attenuation in 0 5dB increments Front panel manual loopback switch Front panel mounted bantam jacks f...

Page 3: ...4 CIRCUIT DESCRIPTION Refer to Figure 3 the 3653 36 block diagram as needed while reading the following circuit description 4 1 Transmit VF Path VF signals applied to the input T R pins 50 and 48 are...

Page 4: ...s dc sealing current sustains the normal resistance of the cable pairs and prevents degradation of transmission performance In the LP Loop position the simplex leads of T1 and T2 are shorted together...

Page 5: ...mentarily operated 4 6 7 5 6 Bit or 8 Bit Encoding Decoding The 3653 36 provides 7 5 6 bit or 8 bit encoding and decoding schemes for the transmit and receive paths to from the facility The 7 5 6 bit...

Page 6: ...d S7 ELL GAIN ATTN Equal Level Loopback Prescription Gain Attenuation Switch S6 is a 6 section DIP switch that provides up to 31 5dB of equal level loopback in 0 5dB steps S7 is a two position slide s...

Page 7: ...ansmit Alignment in Part 8 Switches S2 and S3 form a 9 section DIP switch that provides up to 32 5dB of attenuation in 0 1dB steps for adjusting the transmit path to the proper operating level at the...

Page 8: ...t be obtained XMT ATTN TLP 19 5 Use Table 2 for common TLP values For example for a 0 db transmit TLP set the sum of S2 and S3 to 19 5 by placing the switch sections shown be low in the ON position 2...

Page 9: ...nsmit TLP Values Desired TLP Set S3 S2 Desired TLP Set S3 S2 13 12 11 10 9 8 7 6 5 4 3 2 1 0 5 0 0 5 1 2 32 5 31 5 30 5 29 5 28 5 27 5 26 5 25 5 24 5 23 5 22 5 21 5 20 5 20 19 5 19 18 5 17 5 3 4 5 6 7...

Page 10: ...act Charles Industries Ltd for replacement or repair instructions or follow the Repair Service Procedure below 11 3 Advanced Replacement Service In Warranty Units Charles Industries Ltd offers an adva...

Page 11: ...Underwriters Laboratories Standard 1459 Second Edition Compliance is re stricted to inside plant wiring Field repairs may void compliance b FCC P 15 Class A c Meets Canadian CSA and DOC requirements...

Page 12: ...back l DETECTOR FREQUENCY Will detect within 2713 7Hz will not detect outside of 2713 35Hz m DETECTOR AMPLITUDE Will detect 0 0 to 30dBm0 will not detect less than 40dBm0 n DETECTOR TIMING Activate 2...

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