and the gain control.
telemetry.
The lock-on control is only used for telephone
The horizontal and vertical position and intensity controls
for the oscilloscope are located on the scope mounting plate.
All
of these controls are on the front pane) (Fig. 17)
Procedure
l.
Connect cables from the 110 volt 60 cps line, recorder
and radio.
2.
Turn line switch on and press the release button.
Ze
After five minutes warm-up, bring the recorder to zero
by adjusting the zero set control (R-67).
‘The zero
test button is pressed to check the zero of the
recorder when telemetering rather than the release
‘switch, since it does not affect the counting and
switching circuits.
Therefore, the recorder will rise
to the proper reading immediately after th
release
of the button.
Commence telemetering by pressing the read button and
adjusting the level (gain) control (R-3) until the height
of the pulses as observed on the oscilloscope is approximately 2/3 the height of the scope face.
The switching
relays will be heard if the circuit is operating properly.
Note:
When the telemeter radio channel is used for voice communication,
the release button should be pressed, otherwise the central station
will be actuated by the voice signal resulting in erratic fluctuations
of the recorder.
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