Specifications

Type: Digital Input
Description: Unless superseded by a higher priority
PTT input (see Table 1), when the REM
LED on the front panel is illuminated, an
active level at this input will cause the
transmitter to transmit a carrier modulated
by the audio signal on the REMOTE TX
AUD input (pin 7).
Level: This input is active with input voltages
less than 0.8 volts and inactive with input
voltages greater than 3.5 volts or when
left unconnected. Voltages between 0.8
and 3.5 volts should be avoided, except
during switching. Voltages below 0 volts
and above 5 volts should always be
avoided. The driving source should be
able to sink up to 5 mA to produce an ac-
tive level.
Pin Number: 3
Name: REMOTE RX AUD
Type: Analog Output
Description: Buffered and squelched de-emphasized
receive audio output. This output is un-
balanced to ground unless the optional
balanced 600 ohm interface board is in-
stalled. When this board is installed, this
output is one half of a balanced output.
The other half would be on Pin 12.
Impedance: 600 ohm nominal, AC coupled.
Level: When the receiver is receiving a noise
quieted signal that is modulated at ± 3
kHz by a 1 kHz tone, this output will vary
between 75 mv and 1.5 volts RMS open
circuit depending upon the setting of
R480 on the main PC board.
Frequency
Response:
From 300 Hz to 3 kHz within +1/-3 dB of
a 6 dB/octave de-emphasis curve.
Pin Number: 4
Name:
DATA PTT
Type: Digital Input
Description: Unless superseded by a higher priority
PTT input, an active level at this input
will cause the transmitter to transmit a
carrier modulated by the signal on the
DATA IN input (pin 11).
Level: This input is active with input voltages
less than 0.8 volts and inactive with input
voltages greater than 3.5 volts or when
left unconnected. Voltages between 0.8
and 3.5 volts should be avoided, except
during switching. Voltages below 0 volts
and above 5 volts should always be
avoided. The driving source should be
able to sink up to 5 mA to produce an ac-
tive level.
Pin Number: 5
Name:
INTERCONNECT PTT
Type: Digital Input
Description: Unless superseded by a higher priority
PTT input, an active level at this input
will cause the transmitter to transmit a
carrier modulated by the audio signal on
the INTRCNT. TX AUD input (pin 14).
Level: This input is active with input voltages
less than 0.8 volts and inactive with input
voltages greater than 3.5 volts or when
left unconnected. Voltages between 0.8
and 3.5 volts should be avoided, except
during switching. Voltages below 0 volts
and above 5 volts should always be
avoided. The driving source should be
able to sink up to 5 mA to produce an ac-
tive logic level.
Pin Number: 6
Name: +13.8VSW OUT
Type: Analog Output
Description: This is the output of the internal 13.8 volt
power supply. Since this supply also sup-
plies current for the radio, loads con-
nected to this pin should be limited to less
than 1 A current drain. This line is un-
fused, except for the primary fuse inside
the power supply, but has internal shut-
down on excessive load currents.
AE/LZB 119 1882 R1B
16