Triplett CableRater- PN: 3279 - Manual (Page 19)

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The CableRater is limited to testing Gain up to about 40dB. Attempting to mea-
sure higher gains will produce inaccurate results.
To test the Gain of an amplifier, first calibrate the Transmitter as described in 9.4.
Then connect the CableRater Transmitter’s output to the amplifier’s input, and
the amplifier’s output to the CableRater Receiver’s input, as shown in Figure 9.
Press the ‘Meter’ button on the Receiver and read the Gain on the LCD display.
UNLOCK
Figure 9
Transmitter, Amplifier, and Receiver
The maximum output level that an amplifier can produce must be considered.
Most common amplifiers cannot produce output levels exceeding about 40dBmV.
Since the output level of the CableRater Transmitter is 10dBmV, an amplifier
with a 30dB gain connected directly to the Transmitter output will produce a
40dBmV (10dBmV + 30dBmV = 40dBmV) signal at the amplifier output... if the
amplifier doesn’t ‘saturate’. “Saturation” occurs when an amplifier can’t pro-