51
Vega’s C-
6124
6.4 LEVEL ADJUSTMENTS
The above figure shows a top view and side view of the TLM card with the adjustment points labeled. The
side view is the view one would have if the back cover of either the Switch Bus Module (SBM) or the End
Bus Module (EBM) were removed for card adjustments. The potentiometers that are most likely to be
adjusted are available without taking the card out of the chassis.
6.4.1 TRANSMIT SIDE ADJUSTMENTS
The transmit side audio is a summation of four different audio sources – microphone audio, crosspatch
audio, single tones, and DTMF tones. The following is a list of the potentiometers that affect the transmit
path. The “Access” field identifies the potentiometers as one that is internal or external. An external
adjustment is one that can be accessed by just taking the back panel off. An internal adjustment requires
that the card be pulled out of the console to be adjusted. For internal adjustments it is recommended that an
extender card be purchased from the factory.
Reference
Access
Description
RV7
internal
Microphone audio
RV8
internal
Crosspatch transmit
RV4
external
Transmit driver
RV6
internal
Tone output
RV10
internal
Notch frequency phase control
RV11
internal
Notch frequency adjust
RV15
internal
DTMF output levels
RV1: RX INPUT LEVEL
TP9: RX INPUT LEVEL
RV4: TX OUTPUT LEVEL
RV2: TX MONITOR LEVEL
TP8: TX MONITOR LEVEL
RV9: LAM LEVEL
RV14: RECORDER OUTPUT
RV6
RV14
RV9
RV2
RV4
RV1
TP9
TP8
TP11
RV3
TP17
RV7
RV8
TP3
TP12
TP6
TP2
RV13
RV12
RV11
RV10
TP4
RV5
RV15
