Operation - JK Audio innkeeper 1rx Digital Hybrid User Manual

Operation

Send Signal Level
The <Send> LEDs display the signal level as it goes out to the phone line. The
goal is to drive the phone line at high enough levels to avoid phone line noise,
but not so loud as to cause excessive clipping. Adjust the <Send> level control
until you see occasional flashes of the second green LED (-9dB) and very rarely
any flashes of the red -3dB peak Send LED. These flashes should occur only
during loud speech bursts. If the red LED stays lit for extended periods you can
assume that much of your speech is being clipped or distorted. In this case you
should lower the <Send> volume control.
Receive Signal Level
The <Receive> LEDs display the signal coming from the phone line and out of
the DSP. The <Caller> level control does not change what you see on these
LEDs. Adjust the <Caller> level control to give you the best signal at your
equipment.
AGC
When the Automatic Gain Control <AGC> is used, innkeeper 1rx automatically
adjusts the <Caller> level to maintain acceptable levels between calls. In this
way an unusually loud caller will be similar in level to the unusually soft caller.
Caller Ducking
The Caller <Ducking> option lowers the level of the Caller's audio by 9 dB when
local audio is present. This is a good way to regulate those obnoxious callers
when the talent is speaking.
Presence
The <Presence> feature is a custom digital filter that boosts low frequencies in
the 120Hz to 500Hz region to compensate for losses in the telephone network.
This is a single ended algorithm that treats only the Caller signal before it leaves
the digital hybrid. You may notice that it has more of an effect on low pitched, or
deeper voices.
1 kHz Tone Generator
The <1 kHz tone> generator is a three-state button used for setting levels on
your other equipment. It is not used to null the phone line. When pressed once a
full scale 0dB maximum output level signal is sent down the phone line. This will
allow you to calibrate levels at the other end of the call. When pressed again, this
same signal is sent to the <Caller> output only. This will allow you to calibrate the
signal level at your console. The tone generator is disabled when pressed a
third time.
Auto-Answer
The <Auto-Answer> feature will answer on the first ring. When <Auto-Answer>
is enabled, you can still make calls manually using the <Call> button.
When finished, you can either drop the call manually or allow the call to
Auto-Disconnect. innkeeper will look for a CPC (Calling-Party-Control)disconnect
signal or ROH (Receiver-Off-Hook) message from the phone company to
determine when a call has disconnected. This can take up to a minute.
8 innkeeper 1rx™ Digital Hybrid