Transducers; Front Panel Controls/Rear Panel Connectors; Headset - Welch Allyn Grason-Stadler GSI 17 Series Service Manual

1.7 STIMULUS TYPES
Continuous Tone
Continuous FM Tone
Pulsed Tone
SIGNAL FORMAT
Continuous - Signal steady as long as Present Bar is depressed.
Pulsed -
Pulsed Rate:
Pulse rate is synchronized to the "Present Bar" so that
first and last pulse will have 200 ms on time.
DUTY CYCLE
50%
RISE/FALL TIME
20-50 ms
ON/OFF RATIO (BETWEEN PULSES)
>20 dB
FREQUENCY MODULATION
FM Rate:
5 Hz
FM Deviation:
1.8

TRANSDUCERS

HEADSET

TDH39 Earphones with 60 ohm impedance
1.9 FRONT PANEL CONTROLS AND REAR PANEL CONNECTORS
FRONT PANEL
CONTROLS
Frequency Selection
HL Select
Mode Selector (Pulsed/Steady/FM)
Routing (Left/Right)
Present Bar
Power Switch
"+10 d B " Push-Button
2.5 Pulses/sec
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