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Page 8 VL-1000 Operating Manual
5. PTT Jacks
Shorting the center pins of these jacks to
ground activates the amplifier for transmission.
This function will normally be provided by am-
plifier control contacts in the T/R relay (or open-
collector NPN transistor) in the exciter. Open
circuit voltage at this PTT jack is 5V DC, and
maximum closed circuit current required is 10
mA.
6. ALC Jacks
These RCA jacks provide the ALC (output)
voltage for control of the exciter’s RF drive
level. The ALC control voltage range is 0 to
10 VDC.
7. GND Terminal Post
Connect this terminal to a good earth ground
using the shortest practical length of heavy
braided cable. All other station equipment
should be grounded to the same ground sys-
tem.
1. ANTENNA Jacks
Connect these type M (SO-239) jacks to
your antennas using large (RG-213 or larger)
50 Ω impedance coaxial cable with mating
plugs (Type M/PL-259).
2. REMOTE Switch
When this switch is in the ON position, the
VP-1000’s +48V DC supply voltage will be con-
trolled by the transceiver’s power switch if you
are using a Yaesu transceiver with a B
AND DATA
cable.
3. BAND-DATA 1 Jack
This 8-pin DIN jack provides for a supplied
control cable for the Yaesu transceivers, to al-
low automatic band selection, T/R control, and
power on/off control.
4. BAND-DATA 2 Jack
This D-sub 15-pin jack provides the same
connections as does the BAND-DATA 1 Jack,
plus additional connections for special appli-
cations.
Rear Panel Connectors and Switch
10


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