Yaesu VR-5000 Operating Manual page 14

Installation
MUTE Terminal Connections
The MUTE jack on the rear panel allows the receiver to be silenced during transmission,
should the VR-5000 be utilized with an external transmitter (not available from Yaesu).
Typically, such a transmitter will have an internal relay, the contacts of which will close to
ground during transmission; connection of a cable connected to this type of switching
system will cause the audio output from the VR-5000 to be cut off (when the center con-
ductor is shorted to ground).
If an external transmitter is used, it is
important also to disconnect all anten-
nas connected to the VR-5000 during
transmission. An external switch or re-
lay will be required for this task.
Ω ～
EXT SP (4
REC Jack Connections
The rear panel's REC jack provides constant-level "Line Out" audio output, suitable for
connection to a tape recorder, modem, or computer sound card for recording or data-
decoding purposes. The front panel Volume control does not affect the output level at this
jack, which is 8 mV (rms) at 1 kΩ impedance.
EXT SP Jack Connections
An external loudspeaker may be connected to the rear panel's EXT SP jack. The external
loudspeaker should have an impedance between 4Ω and 16Ω. Do not connect earphones
to this jack, as the output level is high enough to yield the potential for hearing damage.
12
DC 13.5V
EXT SP
GND
Ω)
16
Transmmiter triggerd relay
MUTE
GND
Normally Closed (N.C)
MUTE
ANT B
REC +8V IF OUT
GND
8 mV (rms) at 1 k
VR-5000 O
Normally Open (N.O)
Common
B A
ANT
ANT A
CAT
Ω
impedance
M