Triplett CableRater- PN: 3279 - Manual (Page 10)

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9.1.3 ZERO CALIBRATE Knob
The ZERO CALIBRATE knob is used to ‘calibrate’ the Transmitter to the Receiver
(more on this later). It can be turned clockwise or counterclockwise to increase
or decrease the level of the test signal generated by the Transmitter.
9.1.4 OUTPUT Connector
The OUTPUT connector is a standard F connector (the kind commonly used for
cable TV installations). The test signal generated by the Transmitter comes out
of this connector or ‘jack’. This jack is usually connected to the input of the cable
TV distribution system being tested, or, if testing individual components (like a
Splitter or Amplifier), to the input of the device being tested. This sometimes
requires the use of a ‘patch cable’.
9.2 Description of Receiver
9.2.1 Meter Push On/Off Button
The Meter Push On/Off button is used to turn the Receiver On and Off. If the
Receiver is Off, pressing the button will turn it On. If the Receiver is On, pressing
the button will turn it Off.
When first turned On, the Receiver’s LCD display may momentarily show ran-
dom numbers or symbols, but within a few seconds, the display should indicate
the correct level.
When turned Off, the Receiver goes into a low power standby mode waiting for
the next button press. It can remain in this mode for months without depleting
the battery. If the Backlight is turned On when the Receiver is turned Off, the
Backlight is turned off also.
9.2.2 Backlight Push On/Off Button
The Backlight Push On/Off button is used to turn the LCD display Backlight On
and Off. The button only works if the power to the Receiver is already On. If the
Receiver is On, pressing the button will turn the Backlight On. If the Backlight is
On, pressing the button will turn it Off.
The Backlight uses a lot of power, more power than the rest of the electronics in
the Receiver, and if left on will cut the battery life significantly. For this reason, a
separate button allows the user to decide if he needs the Backlight or not.
The Backlight is not bright, and may not be seen in normal room lighting, but it
is clearly visible in the dark, allowing the user to take readings in poorly lit sur-
roundings.