Talk Forward
The Talk Forward Button allows the operator to speak directly to the patient
using the Mic/Monitor headset. Pressing and holding the Talk Forward button
interrupts the stimulus that is being presented and activates the microphone in all
selected transducers on Channel 1 and Channel 2. The GSI Pello resumes the test
status when the pushbutton is released. The light pipe around the Talk Forward
button will be illuminated when enabled.
Interlock
The Interlock pushbutton locks the presentation function of the two channels
together so that stimulating one channel will also stimulate the other, according
to the status of the Interrupt button of Channel 1 and Channel 2. When the
Interlock is active, an icon is displayed on the LCD and the light pipe around the
button is illuminated.
Tracking
The Tracking pushbutton allows the Channel 2 signal level to track the Channel 1
signal level. When in Tracking, any dB change to the Channel 1 dB HL causes
the Channel 2 dB HL to change by the same amount, until the limit of the
Channel 1 transducer is reached. If the dB HL limit is reached in Channel 2
before Channel 1, the Channel 2 dB HL display will temporarily flash and remain
at this level. Tracking remains on. When the Channel 1 dB returns to a level at
which the selected difference between the two channels can resume, Channel 2
again tracks Channel 1. When tracking is selected, an icon will appear on the
screen and the light pipe will be illuminated. It is possible to manually change the
level of Channel 2 to alter the dB difference between the two channels without
deselecting Tracking.
Status / Audiogram Button
The Status / Audiogram button is used to select the format for the screen display.
Pressing it will change the screen between displaying the Status (table) screen
and the Audiogram screen for the Tone, High Frequency, TEN and Speech Test
Types. On the Tone test type, this button allows access to the Fine Frequency
Resolution (optional) for detailed frequency testing.
Data Transfer
When the Data Transfer button is pressed, a data record containing the stored test
data is transmitted to an external computer. Data is transferred as a complete
battery of all saved test results. The data transfer format is configurable – see
details regarding the data format options in the GSI Instrument Services manual.