Connectors And Keyboard - Promax PROLITE-23 Manual De Instrucciones

4.2 Connectors and keyboard.

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[1] Optical input connector.
[2] Connector of external power supply.
[3] RS-232 interface connector.
[4] Measurement units.
Press this key to switch the measurement mode between absolute power (dBm)
and relative loss (dB). Hold the key until "HELD" is displayed (approximately
several seconds) switches to µW mode.
[5] Reference value.
Press this key to display the reference value stored in memory. Hold the key
down until "HELD" appears in the display (approximately several seconds), and
store this value in internal memory as the reference power level. When Prolite-23
is switched to dB mode, LCD displays the difference in dB between the reference
level and the current input signal.
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Figure 3.- Panel of Prolite-23
USER'S MANUAL. PROLITE-23
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06-2008