95
Series 4000 Phone Coupler (Optional)
3. Hybrid Adjustment
Each test runs for up to 3 minutes. During that time, if the
Connect
button is pressed
again, the next test will commence. The unit will return to normal operation mode in any
of these cases:
• The
Connect
button is pressed during test 3.
• The current test is allowed to time out.
• The
Connect
button is pressed and held for 3 seconds. Holding the
Connect
button
down to return to normal operation mode is acknowledged by a rapid blinking of
the
Ring
LED. The rapid blinking stops and the
Ring
LED goes out when the
Connect
button is released.
Each test indicates that it is running by blinking its test number of
1
/
3
-second blinks (1, 2,
or 3
1
/
3
-second blinks) every 3 seconds.
Accessing the Test Points
To perform the tests and adjustments, the cover of the phone coupler must be removed to
gain access to the test points and some of the potentiometers.
To remove the cover
1. Disconnect the power cord from the unit.
2. Disconnect the phone line(s).
3. Disconnect all cabling.
4. Remove the three Phillips-head screws on the rear of the unit.
5. Slide the cover back, then lift it to remove it.
6. Reconnect the power cord and interface cables to P1.
7. Reconnect the phone line to the modular connector of each channel.
Test Points
Table 36: Test points
Note
Tests 1 and 2 are performed at the factory. These two gain settings
should never again need to be adjusted. Test 3 needs to be
performed during installation.
TP1
Rx audio from the console at the output of the first gain stage.
TP2
Power Up Reset circuit. +5 VDC = Reset; 0 VDC = Operate.
TP3
Dial Click Decode circuit, after sensitivity adjustment.
TP4
Tx audio from the phone just after the hybrid.
TP5
“VP” bias voltage. Should be +2 VDC.
Содержание 4000 Series
Страница 1: ...Series 4000 Communication Control System Installation and Configuration 025 9533Y...
Страница 6: ...6 025 9533Y...
Страница 28: ...Introduction 28 025 9533Y...
Страница 88: ...Common Control Equipment Installation 88 025 9533Y Figure 22 Console Duplex Wall Jacks...
Страница 110: ...Common Control Equipment Installation 110 025 9533Y...
Страница 172: ...Console Installation 172 025 9533Y...
Страница 192: ...Audio Level Adjustments 192 025 9533Y...
Страница 230: ...Accessory Installation 230 025 9533Y...
Страница 236: ...Console ANI Programming 236 025 9533Y...
Страница 339: ...339 RSMP Operation Figure 99 Main Screen...
Страница 350: ...Radio System Management Program 350 025 9533Y...
Страница 362: ...Appendix B Troubleshooting 362 025 9533Y...
Страница 417: ...417 Index wiring accessories 164 wall jack 86 wiring diagram for M4219 244 X XMT button labels 332 XP settings 247...
Страница 418: ...Index 418 025 9533Y...