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Page Title:
Table 2-9A. 1-KHZ Electronic Switch Logic |
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|  TM
11-5820-919-40-1
When voice
tone level adjust and applied to the
Voice Transmission.
2-79.
1-kHz electronic switch. When the CW
transmission (V-TR) has been selected on
Key signal is applied to the 1-kHz elec-
the control panel and a handset (or head-
tronic switch from the control panel,
set) is used, the Xmt Audio is routed
the 1-kHz tone is routed through the
through the collector to the emitter of
the microphone switch and to the trans-
electronic switch to the third frequency
mit audio amplifier.
No attenuation
converter and to the sidetone level
adjust.
The 1-kHz tone is present when-
takes place.
ever the telegrapher's key is pressed
2-80.
CW Key Transmission.
When V-TR
(CW Key 0). The 1-kHz electronic switch
operates in the same manner during Tune
has been selected on the control panel
In Progress to generate the Tune In
and a telegrapher's key is used, the
Progress tone. Table 2-9A describes
transmit audio amplifier is bypassed.
The 1-kHz tone is received from the syn-
the logic for the 1-kHz electronic
switch.
thesizer and routed through the 1-kHz
1-KHZ
ELECTRONIC
SWITCH
LOGIC
Input
CW
Tune
In
Progress
1-kHz
Switch
Results
I
1
Open
1
Closed
1
0
0
Closed
1
Closed
0
0
0 = gnd
1 = open
When data
attenuator of the microphone attenuator
Data
Transmission.
2-81.
switch. The Xmt Audio is attenuated to
transmission (D-TR) has been selected on
-36 dbm when the input is 0 dbm. Refer
the control panel, Data Enable enables
to table 2-10 for microphone/data
the microphone attenuator control, and
attenuator switch logic.
the Xmt Audio is routed through the
MICROPHONE/DATA
ATTENUATOR
SWITCH
LOGIC
Input
Transmit
Audio
Data Enable
Not
attenuated
0
Attenuated
1
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