
Chapter 3. Operation
Front Panel Operation
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PWR  | ERR ALM  | LB  | 
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  | ENTER  | |
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TD  | RD  | RS  | CS  | 
  | SCROLL  | 
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  | CANCEL  | ||||
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Displays:  | 
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1 PWR:  | 
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  | LED "ON" when power is received by TSU.  | ||
2 ERR:  | 
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  | LED "ON" when errored events have happened in the  | ||
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  | last second.  | 
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3 ALM | LED "ON" when an alarm condition exists.  | 
4 LB  | LED "ON" when unit is in loopback.  | 
5 TD  | LED "ON" when DTE data is being transmitted.  | 
6 RD  | LED "ON" when DTE data is being received.  | 
7 RS  | LED "ON" when RTS active from DTE.  | 
8 CS  | LED "ON" when TSU has CTS active toward DTE.  | 
9 LCD WINDOW | A 2X16 Liquid Crystal Display (LCD) window that dis-  | 
  | plays menu items used in configuration and displays  | 
  | information useful in monitoring the unit.  | 
Operation Keys:
10 UP/DOWN Scroll Scroll keys used to traverse up/down menu trees, in-
Keyscrease/decrease numeric values and scroll through selections.
11 ENTER | Used to choose paths and make selections.  | 
12 CANCEL | Used to exit selections or menu tree branches.  | 
  | Figure  | 
TSU User Manual  |