CX261 Installation and User Guide v1.5
20
APPENDIX
PCB jumper location and settings
The CX261 has various internal PCB-mounted jumpers, the setting of which may require alteration during installation. The table
below lists each switch and jumper and its purpose, together with the factory default setting.
JUMPER
FUNCTION
SETTINGS
DEFAULT
J1
Mic 1 phantom power
OFF: Mic phantom power OFF
ON: Mic phantom power ON
OFF
J2
Mic 2 phantom power
J3
Priority release time
3S: 3 seconds. release time
6S: 6 seconds release time
ABSENT: 12 seconds release time
3S
J4
Mono/stereo operation
MONO: L&R music inputs are summed
STEREO: normal operation
STEREO
J5 (A&B)
L6 priority (left & right)
OFF: no priority – normal operation
ON: L6 has VOX-triggered priority over other sources
OFF
J6
MIC 1 access bypass
PRESENT: MIC 1 always active
ABSENT – use M1 pin on access port to activate MIC 1
PRESENT
J7
MIC 2 access bypass
PRESENT: MIC 2 always active
ABSENT – use M1 pin on access port to activate MIC 2
PRESENT
J8
MOH source select
SEL: MOH/Auxiliary output follows music source selection
L2: MOH/Auxiliary output is always LINE 2
SEL
J9
Music Mute configuration
NO: external contact closure required for muting
NC: external contact opening required for muting
NO
J10
MIC 1 over MIC 2 priority
OFF: Mics have equal priority
ON: MIC 1 has priority over MIC 2
OFF
J11
MIC 1 priority trigger
AVO: MIC 1 priority triggered by announcement (VOX)
ACC: MIC 1 priority triggered by contact closure
ABSENT: no MIC 1 priority: music remains at full level during announcements
AVO
J12
MIC 2 priority trigger
AVO: MIC 2 priority triggered by announcement (VOX)
ACC: MIC 2 priority triggered by contact closure
ABSENT: no MIC 2 priority: music remains at full level during announcements
AVO
J13
Mic over music priority
OFF: music remains during announcement
ON: music mutes during announcement
ON
J14
REM mode source selection
FR: permits front panel source selection in REM mode
SW: front panel source selection disabled in REM mode
SW
J15
Music limiter threshold
0dBu: music level limited to 0 dBu
+6dBu: music level limited to +6 dBu
ABSENT: No music limiting action
0dBu
J16
TEL input impedance
PRESENT: Mic 1 input impedance 600 ohms
ABSENT: Mic 1 input impedance 48 kohms
PRESENT
* J5 consists of two jumpers; they should be moved as a pair