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ArcLight Hub User’s Guide
Component Operating Procedures
Rev. 001 1081006 5-59
Figure 5-37. VPCMA-70 Front Panel Controls and Indicators
Table 5-14. VPCMA-70 Front Panel Controls and Indicators
Item Function
Liquid Crystal
Display
Backlit LCD used in conjunction with the cursor, numeric, ENTER and CLEAR
keys to show and change parameters.
Cursor Keys Used to move up, down, left, or right through menus and menu items displayed on
LCD. Also allows positive/negative sign change.
Numeric Entry
Keys Used to enter numbers 0 through 9.
ENTER Key First press activates entry mode. Second press enters parameter shown on display
into memory.
CLEAR Key Clears entry, and goes back to previous Main Menu.
Status LEDs -----------------------------------------
PCMA ENABLE Lights green when VPCMA is enabled
PCMA LOCK
Lights green when VPCMA is locked (VPCMA must be enabled first)
FAULT Lights red when there is an internal failure. Indicates that the alarm relay is
indicating a fault.
TEST Lights yellow when operating in one of the test modes
POWER Lights green when input power is applied.
Lights green when in remote mode. When in remote mode, the canceller front
panel status displays are available but data entry is disabled.
REMOTE
LED sequence during BIT (POWER LED remains on at all times).
Single pass – All LEDs flash once
Multi-pass – All LEDs sequence as follows:
1 TEST = ALL
2 TEST = REMOTE
3 TEST = TEST
4 TEST = FAULT
5 TEST = TX ACTIVITY
6 TEST = TX ENABLE
7 TEST = ALL (repeats again in sequence)