TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSE
No receive sound from TH1
1) RX Level control not turned up
2) Connect LED not lit
3) Phone line from wall jack to TH1 not connected
4) The Send to Bus dipswitch is in the Off position
(switch to On)
No transmit sound from TH1
to remote site
1) TX Level control not turned up
2) Aux Output level control on AC1 not turned up
3) Aux Output not connected to IN(+) and IN(-).
Feedback or hollow sound
1) Not enough Echo Suppression (increase Echo
Suppression)
2) Large variations in phone line impedance (set Auto
Initialize On)
SPECIFICATIONS
Power Requirements:
200mA at
±
15V
Connectors:
Audio: Depluggable terminal blocks
Telephone/Line: RJ-11 Modular
Remote Control: DB-9
Output Audio:
100 Ohms, actively balanced
Input Audio:
Actively balanced, RF filtered
Input Impedance:
10k
Ω
, balanced
5k
Ω
, unbalanced
Telephone Hybrid:
Standard hybrid transformer with DSP line return
cancellation
Auto Answer:
Selectable - answers after first complete ring
Remote Volume Control:
Range: +6dB to -24dB and Off in 1dB steps.
Range Limit: Selectable - No limit,
+3dB/-6dB, +6dB/-6dB, +6dB/-12dB
Echo Suppression:
Selectable: Auto, 12dB, 18dB, 24dB
Call Frequency Response:
±
1dB 200Hz to 3.5kHz
Caller THD (250Hz to 3.3KHz):
Less than 0.1% (0dBu out)
Send THD (250Hz to 3.3KHz):
Less than 0.1% (0dBu out)
Maximum Output Level:
+26dBu
10
Содержание TH1
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