Triplett CableRater- PN: 3279 - Manual (Page 11)

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9.2.3 Input Connector
The Input connector is a standard female F connector (the kind commonly used
for cable TV installations). The Transmitter’s test signal is applied to this con-
nector or ‘jack’. Usually the test signal has been passed through a cable TV
distribution system, and it is appearing at a ‘Cable TV outlet’. The ‘outlet’, if
configured as a cable terminated in a male F connector, can be connected di-
rectly to the Receiver’s Input jack. If terminated in a wall plate with a female F
connector, a patch cable will be required to connect the test signal to the Input
jack.
If testing individual components (like a Splitter or Amplifier), the output of the
device being tested is connected to the Input of the Receiver. This often requires
the use of a ‘patch cable’.
9.2.4 LCD Display
The LCD display reads Gain or Loss in dB (deciBels). It also provides informa-
tion about the battery condition, the APO mode, and whether an adequate test
signal is being ‘received’.
9.2.4.1 Underrange Indication
If no test signal, or inadequate test signal is applied to the Receiver, the LCD
displays an Underrange condition (see Figure 4).
Figure 4
If the Receiver is turned On without a connection to the Input jack, the Underrange
indication is expected.
If a cable is connected to the Input jack, and the Underrange indication is ob-
served when the Receiver is turned On, the cable is not connected to the test
signal (from the CableRater Transmitter), or something between the Transmitter
and Receiver is introducing so much Loss that the signal is unmeasureable.