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Model 701-312 Page/Party
Problem
Feedback occurs only during
page.
Sidetone (how the operator
hears his own voice) requires
adjustment.
Crosstalk occurs.
Specifications
Amplifier
Power requirements
Voltage......................................................................... 90–140 V ac range, 50/60 Hz, 115 V ac nominal
Power consumed: Zero/max. signal (12 watts) .............................................10 VA, 4.5 W/50 VA, 27 W
Construction/finish........ ........................................................16-gauge cold-rolled steel/gray baked enamel
Handset
Microphone ........................................................................................................ Dynamic, noise-canceling
Receiver ........................................................................Dynamic, hearing aid compatible per FCC Part 68
Cable.........................................................................................................Retractile, 6-foot extended PVC
Material..................................................................................................................................... Gray ABS
External controls.................................................................................Push-to-page switch or push-to-page
Handset Amplifier
Output level....................................................................................... 1.5 Vrms nominal into 600 ohm load
Output limiter .................................................................................................................1.5 Vrms nominal
Gain ................................................................................................... 55 dB nominal (below limiter level);
Frequency response..............................................................................................250–4,000 Hz, +/-1.5 dB
Distortion .................................................................................................. 1.5% maximum THD @ 1 kHz
Controls..............................................................................Microphone gain, receiver volume and sidetone
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-319.doc
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®
600-Ohm Handset/Speaker Amplifier
Use the muting feature in the amplifier enclosure at the terminal blocks.
Connect the violet wire at terminal 8 to terminal 7.
1. Adjust the receiver sidetone at the amplifier, using the extension
ribbon cable as described above.
2. Check that the line balance assembly resistors are connected
properly.
One or more system cable pairs may be improperly terminated. Visually
inspect the system cable connections for accidental crossing of the cable
pairs or grounds.
Pub. 42004-319
Solution
handset pressbar, handset hook-switch
adjustable from 40 to 63 dB
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