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MOUSE OVER FEATURE FOR DESCRIPTION
CLICK ON FEATURE FOR DETAILS
L-260 SWITCH IDENTIFICATION:
POWER:
MAIN - Applies DC / AC power to the panel and connectors
P1 and P3
SPEAKER - Applies DC power from Main to Speaker
channel in P1
PHONE - Applies DC power from Main to Phone channel
in P1
METERING:
DC VOLTS - Panel meter monitors DC voltage applied to the Unit Under
Test.
MAIN - Panel meter monitors all DC current to UUT.
PHONE - Panel meter monitors DC current to phone channel of UUT.
SPEAKER - Panel meter monitors DC current to Speaker channel of UUT
RMS VOLTS - Panel meter monitors the RMS Voltage of the signal selected
by the RMS METERED switch.
RMS METERED:
This switch selects the output channel (9) or input channel (3) for monitoring
by the panel meter.
Output:
PHONE - Panel meter monitors the phone line selected by Phone Lines Out
(12).
MIKE AUDIO - Panel meter monitors the mike line out selected by Mike Line
Outputs (6) switch.
SPEAKER - Panel meter monitors the speaker line output
PA - Panel meter monitors the PA line output.
EXT - Panel meter monitors the EXT line output.
X-CON - Panel meter monitors the cross connection for the intercom
channel
AUX 1 - Panel meter monitors varying outputs depending on the UUT.
AUX 2 - Panel meter monitors varying outputs depending on the UUT.
AUX 3 - Panel meter monitors varying outputs depending on the UUT
Input:
REC IN - Panel meter monitors Com and Nav Receiver inputs selected by
Receiver Audio (12) switch.
MIKE - Panel meter monitors mike audio input selected by Mike Audio
Inputs
C-MIKE - Panel meter monitors crew mike audio input selected by Crew Mike
Audio Inputs (6) switch.
150 OHM / 600 OHM switch used to select a
load for the phone output. Center Off no panel load.
8 OHM / 4 OHM switch used to select a load
for the speaker output. Center Off no panel load.
2K OHM switch used to select a load for x-con line.
Center Off no panel load.
RECEIVER AUDIO - switch connects Receiver
Audio Jacks to selected COM or REC audio inputs.
PHONE LINES OUT - Selects phone channel
output line for metering and/or monitoring by panel
.
VOLUME - Adjust the volume at the L-260 panel
speaker.
UNSWITCHED 2 / OFF / UNSWITCHED 1
- Connect the Receiver Audio tip jacks to selected unswitched audio input.
S1 THRU S7 - Used for varying options depending
on the Unit Under Test.
MIKE LINE OUTPUTS - Selects both audio
and key mike line output for metering and/or monitoring by the panel.
MIKE AUDIO INPUTS - Connects mike audio
jack and the tip jacks to selected mike audio input.
MIKE KEY INPUTS - Connects mike key line to
selected mike key input.
MIKE KEY - Switch grounds mike key line.
KEY OUT LAMP
Lamp lights when selected mike key line is grounded.
CREW MIKE AUDIO INPUTS - Connect
audio generator signal to selected crew-member intercom line.
HEADSET / OFF / PANEL SPEAKER
- The HEADSET position is for a quick headset test. The PANEL SPEAKER position
allows the L-260 panel speaker to output the selected audio at the RMS METERED
switch.
TIP JACK IDENTIFICATION:
RMS METERED - Can be used to externally
meter selected audio output or input lines. Can be used to connect a watt meter
to a selected audio line.
SPEAKER - Can be used to externally meter
speaker line or to connect a custom load.
PA - Can be used to externally meter PA line or to
connect a custom load.
EXT - Can be used to externally meter the external
speaker line or connect custom load.
X CON - Used as both output and input. As output
used to externally meter intercom cross connect line. As input used to apply
audio signal to cross connect line. Also to connect a custom load to line.
RECEIVER AUDIO - Connect signal
generator to selected Com receiver / Nav receiver audio input line.
PHONE LINE OUT - Can be used to
externally meter selected phone line output.
MIKE LINE OUTPUTS - Can be used to
externally meter selected mike audio output.
CREW MIKE AUDIO INPUTS - Connect
signal generator to selected Crew intercom mike audio line.
MIKE AUDIO INPUTS - Connect signal
generator to selected mike input.
MIKE JACK - Connect a power mike or carbon mike
for mike input for pilot / copilot.
PHONE JACK - Connect headphones or watt meter to
selected phone output.
HEADSET JACK - Connection for both mike and
headphone audio.
CONNECTORS:
P1 DD-50S
Mike lines, Comm Receiver, Nav Receiver, and unswitched audio inputs to UUT.
Also S5 and S6 double throw center off switch lines.
P2 DB-25S
Speaker, Phone, PA, EXT, XCON, AUX1-3 audio outputs. DC power to UUT.
Four 8 ohm load resistors and S7 double throw center off switch lines.
P3 DC-37S Pilot,
Copilot, Crew Phone lines from UUT. Comm and AUX mike audio and key
lines from UUT. Also S1, S2, S3, S4 double throw center off switch lines.
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