Table of Contents
Advertisement
Figure 34: DCC Adjustments, Test Points, and Indicators
950/702-xxxx
Dual Channel Card Part Number
Channel B
Channel B Test Points
o
TX
Transmit audio, before adjustment. 2.2Vpp max
o
Not used
o
AGC
AGC'd Receive audio. 2.2 Vpp max
o
RX
Pre-AGC Receive audio
o
GND
Signal Ground
B
Channel B Level Adjustments
4W
o
RX
Four-Wire Receive Level
2w
o
RX
Two-Wire Receive Level/TX Monitor Level
o
TX
Transmit Level
Channel A
Channel A Test Points
o
TX
Transmit audio, before adjustment. 2.2Vpp max
o
Not used
o
AGC
AGC'd Receive audio. 2.2 Vpp max
o
RX
Pre-AGC Receive audio
o
GND
Signal Ground
A
Channel A Level Adjustments
4W
o
RX
Four-Wire Receive Level
2w
o
RX
Two-Wire Receive Level/TX Monitor Level
o
TX
Transmit Level
Channel B
Channel B Status Indicators
O
CALL
Green CALL. On while VOX activity
O
LOTL
Red Line-Operated-TX-Lamp. On while remote console Xmiting *
O
BSYIN
Red BUSY-IN. On while local parallel console Xmiting
O
XMIT
Red XMIT. On while this channel is transmitting
Channel A
Channel A Status Indicators
O
CALL
Green CALL. On while VOX activity
O
LOTL
Red Line-Operated-TX-Lamp. On while remote console Xmiting *
O
BSYIN
Red BUSY-IN. On while local parallel console Xmiting
O
XMIT
Red XMIT. On while this channel is transmitting
o
+5V
+5 volt (approximately) Audio Supply Test Point
o
GND
Audio Supply Ground
o
-5V
-5 volt (approximately) Audio Supply Test Point
* FCN/GT test points are present only on Tone Control DCC. LOTL is present on Local Control DCC.
Overview
179
Advertisement
Table of Contents
