Unit Description (18-0015) AM-48 Test Set
0015-S033-10
8
Two-position toggle plus momentary switch.
• Set <SF SKP> to skip the signaling frequency band of
2450 Hz to 2750 Hz (2130 Hz to 2430 Hz for
AM-48E), avoiding the accidental transmission of
signaling frequencies.
• Set <NOR> to allow the internal signal generator to be
stepped through all frequencies within its range while
in the SWEEP and VAR
SEND modes.
• Press <X TONE> to momentarily send a 2713 Hz tone,
overriding the internal signal generator. This feature
is useful for actuating loopback devices. See ¶6.6
under "
Loopback Testing " for the procedure to use the
Western Electric Model 829 loopback device.
9
Dual momentary switch.
• Press <RCL/STO> to recall and/or store up to 10 test
setups. See ¶7.36 for details.
• Press <PRINT> to send unit setup and measurement
results to the printer port, <PRT>. See ¶3.9 and 7.39
for details.
10
Three-position slide switch. See Figure 6-1 and 6-2 for
2-wire and 4-wire line connections associted with this
switch.
• Set <2W> to connect the internal measurement
circuitry and signal generator across the 2-wire line at
the <SND> jack. The signal generator source
impedance of 600 or 900 ohms terminates the line in
all signal generator modes except QUIET.
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