Charles 3653-36 Скачать руководство пользователя страница 12

Section 365–336–202

12

Table 4.  Frequency Response

FREQ (Hz)

XMT (dB)

RCV (dB)

60

Less than –14.0

––––––––

200

+0.15 to –2.0

+0.15 to –1.0

300

+0.15 to –0.15

+0.15 to –0.15

1000

0 (REF)

0 (REF)

3000

+0.15 to –0.15

+0.15 to –0.15

3400

0 to –1.5

0 to –1.5

4000

Less than –14.0

Less than –14.0

(j) CROSSTALK: 61dBm0 minimum at 400Hz; 71dBm0 minimum at 700Hz to 1KHz; 70dBm0 minimum

at 3kHz.

(k) LEVEL TRACKING SINGLE-ENDED AT 1020Hz: +0.25dB from +3 to –37dBm0, +0.5dB from –38 to

–50dBm0.

12.2.3. Loopback

(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, 2.2 seconds; deactivate, 1.1 seconds.

(o) ELL GAIN/ATTENUATION RANGE: 0.0 to 31.5dB in 0.5dB increments.

12.3

Physical Specifications

The physical characteristics of the 3653–36 4W are shown in Table 5.

Table 5.  

Physical Specifications

Feature

U.S.

Metric

Height

4.25 inches

10.8 centimeters

Width

1.31 inches

3.3 centimeters

Depth

10.31 inches

26.2 centimeters

Weight

9.25 ounces

263 grams

Temperature

32 to 122

 F

0 to 50

 C

Humidity

To 95% (no condensation)

    

Содержание 3653-36

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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