Spectracom 8194B, Инструкция по эксплуатации

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8194B, 8195B, 8197B Spectracom Corporation
GPS Ageless Master Oscillator Instruction Manual 5-18
5.7.6.2 Delayed PTT Output
Signal: Digital
Connector:
12 Pin Pluggable Header J4 Pin 9 [ or 6 Pin Header J6 Pin 6, ]
Signal Level:
Output structure is a Solid State Switch consisting of two
MOSFETS (AC and DC operation) that present a high
resistance when off and less than 0.4 ohms when on.
Pulse Width:
Follows PTT Input plus an adjustable delay (100 – 500
milliseconds), factory set to 150 milliseconds.
Delay Control:
The trailing edge of the PTT output is delayed 100 – 500
milliseconds from the trailing edge of the PTT input, factory
set to 150 milliseconds.
Delayed PTT Operation: CTCSS tones are gated by PTT; the PTT input active
immediately causes the PTT Output to go active. PTT
inactive will cause the PTT output to go inactive after the
PTT delay. The delay is factory set to 150 milliseconds.
5.7.6.3 PTT Input
Signal:
Digital CMOS levels
Connector:
12 Pin Pluggable Header J4 Pin 5 [ or 6 Pin Header J2
Pin 5].
Signal Level:
CMOS 0.5-4.5 volts or contact closure to ground, minimum
sink current = 0.01 amps. Turn on current equals 10 ma and
turn off current equals 1ua. Turn on voltage equals 0.8 volts
and turn off voltage equals 4.5 volts
Impedance: 2700
ohms
Polarity:
H3 position A for PTT on with closed circuit
H3 position B for PTT on with open circuit