Section 2. Specifications
2-2
INTERFACE
Connections
Rx audio, Tx key, CTCSS / DCS encode, Tx audio (mic), 12
VAC or DC power, ground. Optional carrier detect, alarm input
and aux output.
Connector type
Detachable screw terminal.
Rx input impedance
50 K
Ω
AC coupled. For connection to unsquelched
discriminator audio.
CTCSS / DCS output Level: 0 to 4 Volts p-p. Impedance: Less than 1 K
Ω
AC
coupled.
Transmitter type
Direct FM, or phase modulation. Flat or de-emphasized CTCSS
encode.
Transmitter keying
SPDT relay.
Carrier detect
Internal noise detector or external carrier detect input. External
input threshold adjustable 0 to 7 VDC.
Adjustments
Four adjustments from rear panel: Rx input gain, CTCSS / DCS
encode gain, Tx audio output gain, and carrier detect threshold.
Configuration
switches
Eight switches on rear panel: Rx audio gain high/low, repeat
audio flat/de-emphasized, encode gain high/low, encode flat/de-
emphasized, tx audio gain high/low, COR source
internal/external, COR polarity positive/negative, COR pull up
on/off.
RS-232 serial data
port
Front panel DB9 connector (non-standard pinout). Interface
cables available.
Alarm / Remote PTT
input
Activated via contact closure to ground.
Cables, interface
notes
Available for most repeaters and two-way radios.
