Connection & Configuration (18-0015) AM-48 Test Set
0015-S066-8
Switch 13 Settings . The connections for the settings of Switch 13 are
listed below:
<TERM>
Receive line terminated with a resistive impedance as
selected by Switch 11.
<BRDG> Receive line unterminated and bridged only with the
impedance of the measurement circuitry (>25KΩ) across
the receive pair.
Note: In 2-wire mode, the signal generator source impedance will
terminate the line with 600Ω or 900Ω with Switch 13 in
either <TERM> or <BRDG>. However, if SEND is in QUIET
mode, Switch 13 will be able to function. In 2-wire QUIET
send mode, setting Switch 13 to <BRDG> will disconnect the
signal generator from the send pair and the send pair source
impedance will be >25KΩ. There will be an error of 6 dB if
<BRDG> is incorrectly selected when the line should be
terminated with <TERM>.
Switch 11 Settings . The connections for the settings of Switch 11 are
listed below:
<600Ω> 600Ω applied across the Receive pair when Switch 13 is
set to <TERM>.
Send pair source impedance set at 600Ω.
<900Ω> 900Ω applied across the Receive pair when Switch 13 is
set to <TERM>.
Send pair source impedance set at 900Ω.
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