TELEPHONE INTERFACE MODULE (TIM)

The TIM should be pre-aligned using the Basic Board Module alignment procedures, Section 14-18.

Input With Personality Card Installed

1.Jumper T201, pin 8 to T202, pin 12.

2.Insert 1004 Hz at -12 dBm with a 600 ohm driving impedance into the EQU of J1.

3.Set S5 for Test 7 ( sections 1, 2 and 3 open, close 4).

4.Reset the module, Press S2 and release.

5.Adjust R41 for -6 dBm ±0.5 dB at J11.

6.Verify -6 dBm ±1 dB at TP5.

7.Adjust R214 on the personality card for -12 dBm

±1 dB at EP223 (DTMF input level).

8.Adjust R210 on the personality card for -12 dBm

±1 dB at EP222.

9.Set S5 for normal operation (all sections closed). 10.Reset the module, Press S2 and release. Bandpass Filter and Pulse Detector

1.Jumper T201, pin 8 to T202, pin 12.

2.Insert 395 Hz at -12 dBm with a 600 ohm driving impedance into the EQU of J1. (The typical Dial Tone is 380 + 440 Hz, the 395 Hz simulates this Dial Tone.)

3.Set S5 for Test 7 (sections 1, 2 and 3 open, close 4).

4.Reset the module, Press S2 and release.

5.Verify -6 dBm ±0.5 dB at J11.

6.Verify -6 dBm ±1 dB at TP5.

7.Adjust R210 on the personality card for 0 dBm

±1 dB at EP222.

8.Adjust R257 for a peak level at U203, pin 7 (typically -1 dBm ±1 dB).

9.Set Detector

a.Measure EP225 with an oscilloscope.

b.Adjust R274 until EP225 is high ( >4V).

c.Adjust R274 until EP225 just goes low (< 0.8V).

d.Verify that EP226 is a square wave of the input waveform.

5.Set S5 for normal operation (all sections closed).

6.Reset the module, Press S2 and release.

Output

1.Jumper T201, pin 8 to T202, pin 12.

2.Place a 600 ohm resistor in series with a non-polar- ized 2.2 ∝F capacitor in EQU J1.

3.Set S5 for Test 1 (1 open, close 2, 3 and 4).

4.Reset the module, Press S2 and release.

5.Adjust R83 for -3 dBm ±0.5 dB at TP3.

6.Adjust R44 to be -9 dBm ±1 dB at J12.

(This provides a maximum level of -13 dBm ±2 dB across the line. The loss is due to the hybrid trans-

former. Verify the level across the 600 ohm resistor and 2.2 ∝F cap is -13 dBm ±2 dB, measure with a balanced non-grounded AC voltmeter.)

7.Mobile Speech Detection

a.Set S5 for Test 7 (section 1, 2, 3; open, close 4).

b.Reset the module, Press S2 and release.

c.Insert 700 Hz into J2 EQU with a 600 ohm balanced ungrounded oscillator.

d.Set oscillator for -15 dBm at J201, pin 5.

e.Adjust R282 for -18 dBm ±1 dB at EP227.

f.Adjust R286 (counterclockwise) for a peak at U220, pin 7, -19 dBm ±1 dB.

14-12