Troubleshooting
ITR2000A Tone Remote Desk Set
04/15 26
Problem Possible
Solution
Low TX audio.
Verify that the ITR2000A TX output level is properly set and ensure that
there is no more than 20 dB of loss in the telephone line, which can cause
degradation of the audio signal.
Verify that the microphone sensitivity is set properly:
1.
Using an RF service monitor set to the transmit frequency of the radio,
transmit from the ITR2000A and speak into the handset. Note the
transmit deviation level.
2.
Refer to the “Microphone Sensitivity” section and adjust the handset
transmit level output up or down for the desired modulation level.
Refer to page 18. It may be necessary to adjust the transmit audio
output on the tone remote adapter at the station.
Distorted TX audio.
Verify that the tone remote adapter’s transmit audio output level is not set
too high for the station’s rated input level. Refer to the station and tone
remote adapter manuals for proper setting and adjustment procedures.
Verify that the microphone sensitivity is set properly. Use an RF service
monitor set to the station transmit frequency. Transmit from the ITR2000A
and speak into the handset. Note the transmit level. Refer to the
“Microphone Sensitivity” section and adjust the handset transmit level
output up or down for the desired deviation. Refer to the “Line Output
Adjustment Level” table on page 20 of the “Installation” section for nominal
transmit output levels, and follow the “Adjustments and Diagnostics”
information to set the transmit output level for the internal microphone.
ITR2000A does not
transmit or receive.
Ensure that the ITR2000A is connected to an ac or dc (if using a dc power
supply option) power source.
Check for a blown fuse.
No audio on local speaker
Ensure that the volume is not turned down all the way, and the handset is
on-hook. If receive audio is not switched to the local speaker when the
handset is on-hook, the handset may be defective.
Ensure the local speaker is not muted.
Parallel status updating is
not working properly.
Ensure that the F1 through the F4 buttons on parallel ITR2000As are
programmed identically for the same function tone settings. If the
ITR2000A decodes a function tone not programmed into one of four
buttons, the F1 button LED flashes to indicate an unknown function decode.
Fuse Replacement
CAUTION
For continued safe operation, replace fuses with the same type:
F401 is a Bussman GMA 1 amp FB fuse.
Содержание ITR2000A
Страница 28: ...CARD Suite Software ITR2000A Tone Remote Desk Set 04 15 24...
Страница 31: ...27 04 15 Circuit Boards...
Страница 32: ...Circuit Boards ITR2000A Tone Remote Desk Set 28...
Страница 33: ...ITR2000A Tone Remote Desk Set Circuit Boards 29...
Страница 34: ...Circuit Boards ITR2000A Tone Remote Desk Set 30...
Страница 35: ...31 04 15 Schematics...
Страница 36: ...Schematics ITR2000A Tone Remote Desk Set 32 Line Interface Schematic Sheet 1...
Страница 37: ...ITR2000A Tone Remote Desk Set Schematics 33 User Audio I O Schematic Diagram Sheet 2...
Страница 38: ...Schematics ITR2000A Tone Remote Desk Set 34 Control Microprocessor I O Schematic Diagram Sheet 3...
Страница 39: ...ITR2000A Tone Remote Desk Set Schematics 35 DSP Block Schematic Diagram Sheet 4...
Страница 40: ...Schematics ITR2000A Tone Remote Desk Set 36 Tone Keypanel Schematic Diagram Sheet 5...
Страница 41: ...ITR2000A Tone Remote Desk Set Schematics 37 Power Supply Schematic Diagram Sheet 6...
Страница 42: ...Schematics ITR2000A Tone Remote Desk Set 38 Signaling Section Schematic Diagram Sheet 7...
Страница 44: ...Notes ITR2000A Tone Remote Desk Set 40...
